BaseChannel (Sendbird Chat SDK for Android reference)

java.lang.Object
- com.sendbird.android.BaseChannel

Direct Known Subclasses:

GroupChannel, OpenChannel
```
public abstract class BaseChannel
extends java.lang.Object
```
Objects representing a channel.

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`BaseChannel.ChannelType` Represents channel types.
`static interface`	`BaseChannel.CopyFileMessageHandler` ForwardFileMessage handler.
`static interface`	`BaseChannel.CopyUserMessageHandler` ForwardUserMessage handler.
`static interface`	`BaseChannel.DeleteMessageHandler` DeleteMessage handler.
`static interface`	`BaseChannel.DeleteMetaCounterHandler` DeleteMetaCounter handler.
`static interface`	`BaseChannel.DeleteMetaDataHandler` DeleteMetaData handler.
`static interface`	`BaseChannel.GetMessageChangeLogsByTokenHandler` GetMessageChangeLogsByToken handler.
`static interface`	`BaseChannel.GetMessageChangeLogsHandler` GetMessageChangeLogsHandler handler.
`static interface`	`BaseChannel.GetMessagesHandler` GetMessages handler.
`static interface`	`BaseChannel.GetMyMutedInfoHandler` GetMyMutedInfo handler.
`static interface`	`BaseChannel.MessageMetaArrayHandler` MessageMetaArray handler.
`static class`	`BaseChannel.MessageTypeFilter` Represents messages type filter to be used when messages list are read.
`static interface`	`BaseChannel.MetaCounterHandler` MetaCounter handler.
`static interface`	`BaseChannel.MetaDataHandler` MetaData handler.
`static interface`	`BaseChannel.ReactionHandler` Reaction handler.
`static class`	`BaseChannel.ReportCategory` Report category.
`static interface`	`BaseChannel.ReportHandler` Report handler.
`static interface`	`BaseChannel.ReportMessageHandler` ReportMessage handler.
`static interface`	`BaseChannel.ReportUserHandler` ReportUser handler.
`static interface`	`BaseChannel.ResendFileMessageHandler` ResendFileMessage handler.
`static interface`	`BaseChannel.ResendFileMessageWithProgressHandler` ResendFileMessage handler.
`static interface`	`BaseChannel.ResendUserMessageHandler` ResendUserMessage handler.
`static interface`	`BaseChannel.SendFileMessageHandler` SendFileMessage handler.
`static interface`	`BaseChannel.SendFileMessagesHandler` SendFileMessages handler.
`static interface`	`BaseChannel.SendFileMessagesWithProgressHandler` SendFileMessages handler.
`static interface`	`BaseChannel.SendFileMessageWithProgressHandler` SendFileMessage handler.
`static interface`	`BaseChannel.SendUserMessageHandler` SendUserMessage handler.
`static interface`	`BaseChannel.TranslateUserMessageHandler` TranslateUserMessage handler.
`static interface`	`BaseChannel.UpdateFileMessageHandler` A handler to receive a callback from `updateFileMessage(long, String, String, UpdateFileMessageHandler)`.
`static interface`	`BaseChannel.UpdateUserMessageHandler` A handler to receive a callback from `updateUserMessage(long, String, String, String, UpdateUserMessageHandler)`.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`void`	`addMessageMetaArrayValues(BaseMessage message, java.util.List<MessageMetaArray> metaArrays, BaseChannel.MessageMetaArrayHandler handler)` Adds message meta array values.
`void`	`addMessageMetaArrayValues(BaseMessage message, java.util.Map<java.lang.String,java.util.List<java.lang.String>> metaArrayMap, BaseChannel.MessageMetaArrayHandler handler)` Deprecated. As of 3.0.99, replaced by `addMessageMetaArrayValues(BaseMessage, List, MessageMetaArrayHandler)`.
`void`	`addOperators(java.util.Collection<java.lang.String> userIds, AddOperatorsHandler handler)` Add operators to the channel.
`void`	`addReaction(BaseMessage message, java.lang.String key, BaseChannel.ReactionHandler handler)` Adds `Reaction`.
`static BaseChannel`	`buildFromSerializedData(byte[] data)` Builds `GroupChannel` or `OpenChannel` instance from serialized data generated by `serialize()`.
`boolean`	`cancelFileMessageUpload(java.lang.String requestId)` Cancels an ongoing `FileMessage` upload.
`FileMessage`	`copyFileMessage(BaseChannel targetChannel, FileMessage fileMessage, BaseChannel.CopyFileMessageHandler handler)` Copies a file message from this channel to the target channel.
`UserMessage`	`copyUserMessage(BaseChannel targetChannel, UserMessage userMessage, BaseChannel.CopyUserMessageHandler handler)` Copies a user message from this channel to the target channel.
`MessageListQuery`	`createMessageListQuery()` Deprecated. As of 3.0.25, replaced by `getNextMessagesByTimestamp(long, boolean, int, boolean, MessageTypeFilter, String, List, boolean, boolean, GetMessagesHandler)`, `getPreviousMessagesByTimestamp(long, boolean, int, boolean, MessageTypeFilter, String, List, boolean, boolean, GetMessagesHandler)`.
`void`	`createMessageMetaArrayKeys(BaseMessage message, java.util.List<java.lang.String> metaArrayKeys, BaseChannel.MessageMetaArrayHandler handler)` Creates message meta array keys.
`void`	`createMetaCounters(java.util.Map<java.lang.String,java.lang.Integer> metaCounterMap, BaseChannel.MetaCounterHandler handler)` Creates meta counters.
`void`	`createMetaData(java.util.Map<java.lang.String,java.lang.String> metaDataMap, BaseChannel.MetaDataHandler handler)` Creates meta data.
`OperatorListQuery`	`createOperatorListQuery()` Creates a query instance to get the operator list from this channel.
`PreviousMessageListQuery`	`createPreviousMessageListQuery()` Creates previous message list query for this channel.
`void`	`decreaseMetaCounters(java.util.Map<java.lang.String,java.lang.Integer> metaCounterMap, BaseChannel.MetaCounterHandler handler)` Decreases meta counters.
`void`	`deleteAllMetaCounters(BaseChannel.DeleteMetaCounterHandler handler)` Deletes all meta counters.
`void`	`deleteAllMetaData(BaseChannel.DeleteMetaDataHandler handler)` Deletes all meta data.
`void`	`deleteMessage(BaseMessage message, BaseChannel.DeleteMessageHandler handler)` Deletes a message.
`void`	`deleteMessageMetaArrayKeys(BaseMessage message, java.util.List<java.lang.String> metaArrayKeys, BaseChannel.MessageMetaArrayHandler handler)` Deletes message meta array keys.
`void`	`deleteMetaCounter(java.lang.String key, BaseChannel.DeleteMetaCounterHandler handler)` Deletes a meta counter.
`void`	`deleteMetaData(java.lang.String key, BaseChannel.DeleteMetaDataHandler handler)` Deletes a meta data.
`void`	`deleteReaction(BaseMessage message, java.lang.String key, BaseChannel.ReactionHandler handler)` Deletes `Reaction`.
`boolean`	`equals(java.lang.Object o)`
`void`	`getAllMetaCounters(BaseChannel.MetaCounterHandler handler)` Get all meta counters.
`void`	`getAllMetaData(BaseChannel.MetaDataHandler handler)` Gets all meta data.
`java.util.Map<java.lang.String,java.lang.String>`	`getCachedMetaData()` Returns all locally cached metadata as a map.
`java.lang.String`	`getCoverUrl()` Returns cover image URL.
`long`	`getCreatedAt()` Returns channel creation time.
`java.lang.String`	`getData()` Returns channel data.
`void`	`getMessageChangeLogsByTimestamp(long ts, BaseChannel.GetMessageChangeLogsHandler handler)` Requests message change logs after given timestamp.
`void`	`getMessageChangeLogsByTimestamp(long ts, boolean includeMetaArray, BaseChannel.GetMessageChangeLogsHandler handler)` Requests message change logs after given timestamp.
`void`	`getMessageChangeLogsByTimestamp(long ts, boolean includeMetaArray, boolean includeReactions, BaseChannel.GetMessageChangeLogsHandler handler)` Requests message change logs after given timestamp.
`void`	`getMessageChangeLogsByToken(java.lang.String token, BaseChannel.GetMessageChangeLogsByTokenHandler handler)` Requests the message changelogs from given token.
`void`	`getMessageChangeLogsByToken(java.lang.String token, boolean includeMetaArray, BaseChannel.GetMessageChangeLogsByTokenHandler handler)` Requests the message changelogs from given token.
`void`	`getMessageChangeLogsByToken(java.lang.String token, boolean includeMetaArray, boolean includeReactions, BaseChannel.GetMessageChangeLogsHandler handler)` Requests message change logs after given timestamp.
`void`	`getMessageChangeLogsSinceTimestamp(long ts, MessageChangeLogsParams params, BaseChannel.GetMessageChangeLogsHandler handler)` Requests message change logs after given timestamp.
`void`	`getMessageChangeLogsSinceToken(java.lang.String token, MessageChangeLogsParams params, BaseChannel.GetMessageChangeLogsHandler handler)` Requests message change logs after given token.
`void`	`getMessagesByMessageId(long messageId, MessageListParams params, BaseChannel.GetMessagesHandler handler)` Retrieves previous or next messages based on the message ID in a specific channel.
`void`	`getMessagesByTimestamp(long ts, MessageListParams params, BaseChannel.GetMessagesHandler handler)` Retrieves previous or next messages based on the timestamp in a specific channel.
`void`	`getMetaCounters(java.util.Collection<java.lang.String> keys, BaseChannel.MetaCounterHandler handler)` Gets meta counters.
`void`	`getMetaData(java.util.Collection<java.lang.String> keys, BaseChannel.MetaDataHandler handler)` Gets meta data.
`void`	`getMyMutedInfo(BaseChannel.GetMyMutedInfoHandler handler)` Gets my muted information in this channel.
`java.lang.String`	`getName()` Returns topic or name of the channel.
`void`	`getNextMessagesById(long msgId, boolean isInclusive, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, BaseChannel.GetMessagesHandler handler)` Requests the next messages from given ID.
`void`	`getNextMessagesById(long msgId, boolean isInclusive, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, BaseChannel.GetMessagesHandler handler)` Requests the next messages from given ID.
`void`	`getNextMessagesById(long msgId, boolean isInclusive, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, BaseChannel.GetMessagesHandler handler)` Requests the next messages from given ID.
`void`	`getNextMessagesById(long msgId, boolean isInclusive, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, boolean includeReactions, BaseChannel.GetMessagesHandler handler)` Requests the next messages from given ID.
`void`	`getNextMessagesByTimestamp(long ts, boolean isInclusive, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, BaseChannel.GetMessagesHandler handler)` Requests the next messages from given timestamp.
`void`	`getNextMessagesByTimestamp(long ts, boolean isInclusive, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, BaseChannel.GetMessagesHandler handler)` Requests the next messages from given timestamp.
`void`	`getNextMessagesByTimestamp(long ts, boolean isInclusive, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, BaseChannel.GetMessagesHandler handler)` Requests the next messages from given timestamp.
`void`	`getNextMessagesByTimestamp(long ts, boolean isInclusive, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, boolean includeReactions, BaseChannel.GetMessagesHandler handler)` Requests the next messages from given timestamp.
`void`	`getPreviousAndNextMessagesById(long msgId, int prevResultSize, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, BaseChannel.GetMessagesHandler handler)` Requests the messages created earlier or later than the given ID.
`void`	`getPreviousAndNextMessagesById(long msgId, int prevResultSize, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, BaseChannel.GetMessagesHandler handler)` Requests the messages created earlier or later than the given ID.
`void`	`getPreviousAndNextMessagesById(long msgId, int prevResultSize, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, BaseChannel.GetMessagesHandler handler)` Requests the messages created earlier or later than the given ID.
`void`	`getPreviousAndNextMessagesById(long msgId, int prevResultSize, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, boolean includeReactions, BaseChannel.GetMessagesHandler handler)` Requests the messages created earlier or later than the given ID.
`void`	`getPreviousAndNextMessagesByTimestamp(long ts, int prevResultSize, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, BaseChannel.GetMessagesHandler handler)` Requests the messages created before and after the given timestamp.
`void`	`getPreviousAndNextMessagesByTimestamp(long ts, int prevResultSize, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, BaseChannel.GetMessagesHandler handler)` Requests the messages created before and after the given timestamp.
`void`	`getPreviousAndNextMessagesByTimestamp(long ts, int prevResultSize, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, BaseChannel.GetMessagesHandler handler)` Requests the messages created before and after the given timestamp.
`void`	`getPreviousAndNextMessagesByTimestamp(long ts, int prevResultSize, int nextResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, boolean includeReactions, BaseChannel.GetMessagesHandler handler)` Requests the messages created before and after the given timestamp.
`void`	`getPreviousMessagesById(long msgId, boolean isInclusive, int prevResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, BaseChannel.GetMessagesHandler handler)` Requests the previous messages from given ID.
`void`	`getPreviousMessagesById(long msgId, boolean isInclusive, int prevResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, BaseChannel.GetMessagesHandler handler)` Requests the previous messages from given ID.
`void`	`getPreviousMessagesById(long msgId, boolean isInclusive, int prevResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, BaseChannel.GetMessagesHandler handler)` Requests the previous messages from given ID.
`void`	`getPreviousMessagesById(long msgId, boolean isInclusive, int prevResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, boolean includeReactions, BaseChannel.GetMessagesHandler handler)` Requests the previous messages from given ID.
`void`	`getPreviousMessagesByTimestamp(long ts, boolean isInclusive, int prevResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, BaseChannel.GetMessagesHandler handler)` Requests the previous messages from given timestamp.
`void`	`getPreviousMessagesByTimestamp(long ts, boolean isInclusive, int prevResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, BaseChannel.GetMessagesHandler handler)` Requests the previous messages from given timestamp.
`void`	`getPreviousMessagesByTimestamp(long ts, boolean isInclusive, int prevResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, BaseChannel.GetMessagesHandler handler)` Requests the previous messages from given timestamp.
`void`	`getPreviousMessagesByTimestamp(long ts, boolean isInclusive, int prevResultSize, boolean reverse, BaseChannel.MessageTypeFilter messageType, java.lang.String customType, java.util.List<java.lang.String> senderUserIds, boolean includeMetaArray, boolean includeReactions, BaseChannel.GetMessagesHandler handler)` Requests the previous messages from given timestamp.
`java.lang.String`	`getUrl()` Returns unique channel URL.
`int`	`hashCode()`
`void`	`increaseMetaCounters(java.util.Map<java.lang.String,java.lang.Integer> metaCounterMap, BaseChannel.MetaCounterHandler handler)` Increases meta counters.
`boolean`	`isEphemeral()` Checks if this channel is ephemeral.
`boolean`	`isFrozen()` Checks if this channel is frozen.
`boolean`	`isGroupChannel()` Checks whether the instance is `GroupChannel` type.
`boolean`	`isOpenChannel()` Checks whether the instance is `OpenChannel` type.
`void`	`removeAllOperators(RemoveAllOperatorsHandler handler)` Remove all operators from the channel.
`void`	`removeMessageMetaArrayValues(BaseMessage message, java.util.List<MessageMetaArray> metaArrays, BaseChannel.MessageMetaArrayHandler handler)` Removes message meta array values.
`void`	`removeMessageMetaArrayValues(BaseMessage message, java.util.Map<java.lang.String,java.util.List<java.lang.String>> metaArrayMap, BaseChannel.MessageMetaArrayHandler handler)` Deprecated. As of 3.0.99, replaced by `removeMessageMetaArrayValues(BaseMessage, List, MessageMetaArrayHandler)`.
`void`	`removeOperators(java.util.Collection<java.lang.String> userIds, RemoveOperatorsHandler handler)` Remove operators from the channel.
`void`	`report(BaseChannel.ReportCategory reportCategory, java.lang.String reportDescription, BaseChannel.ReportHandler handler)` Reports this channel of inappropriate activities.
`void`	`reportMessage(BaseMessage message, BaseChannel.ReportCategory reportCategory, java.lang.String reportDescription, BaseChannel.ReportMessageHandler handler)` Reports a malicious message.
`void`	`reportUser(User offendingUser, BaseChannel.ReportCategory reportCategory, java.lang.String reportDescription, BaseChannel.ReportUserHandler handler)` Reports a user of suspicious activities.
`void`	`resendFileMessage(FileMessage fileMessage, java.io.File file, BaseChannel.ResendFileMessageHandler handler)` Resends a file with given file information.
`void`	`resendFileMessage(FileMessage fileMessage, java.io.File file, BaseChannel.ResendFileMessageWithProgressHandler handler)` Resends a file with given file information and gets callback for uploading progress.
`FileMessage`	`resendMessage(FileMessage fileMessage, java.io.File file, BaseChannel.ResendFileMessageHandler handler)` Resends a file with given file information.
`FileMessage`	`resendMessage(FileMessage fileMessage, java.io.File file, BaseChannel.ResendFileMessageWithProgressHandler handler)` Resends a file with given file information and gets callback for uploading progress.
`UserMessage`	`resendMessage(UserMessage userMessage, BaseChannel.ResendUserMessageHandler handler)` Resends a failed user message.
`void`	`resendUserMessage(UserMessage userMessage, BaseChannel.ResendUserMessageHandler handler)` Resends a failed user message.
`FileMessage`	`sendFileMessage(FileMessageParams params, BaseChannel.SendFileMessageHandler handler)` Sends a file with given file information.
`FileMessage`	`sendFileMessage(FileMessageParams params, BaseChannel.SendFileMessageWithProgressHandler handler)` Sends a file with given file information and gets callback for uploading progress.
`FileMessage`	`sendFileMessage(java.io.File file, java.lang.String name, java.lang.String type, int size, java.lang.String data, BaseChannel.SendFileMessageHandler handler)` Sends a file with given file information.
`FileMessage`	`sendFileMessage(java.io.File file, java.lang.String name, java.lang.String type, int size, java.lang.String data, BaseChannel.SendFileMessageWithProgressHandler handler)` Sends a file with given file information and gets callback for uploading progress.
`FileMessage`	`sendFileMessage(java.io.File file, java.lang.String name, java.lang.String type, int size, java.lang.String data, java.lang.String customType, BaseChannel.SendFileMessageHandler handler)` Deprecated. As of 3.0.75, replaced by `sendFileMessage(FileMessageParams, SendFileMessageHandler)`
`FileMessage`	`sendFileMessage(java.io.File file, java.lang.String name, java.lang.String type, int size, java.lang.String data, java.lang.String customType, BaseChannel.SendFileMessageWithProgressHandler handler)` Deprecated. As of 3.0.75, replaced by `sendFileMessage(FileMessageParams, SendFileMessageWithProgressHandler)`
`FileMessage`	`sendFileMessage(java.io.File file, java.lang.String name, java.lang.String type, int size, java.lang.String data, java.lang.String customType, java.util.List<FileMessage.ThumbnailSize> thumbnailSizes, BaseChannel.SendFileMessageHandler handler)` Sends a file with given file information.
`FileMessage`	`sendFileMessage(java.io.File file, java.lang.String name, java.lang.String type, int size, java.lang.String data, java.lang.String customType, java.util.List<FileMessage.ThumbnailSize> thumbnailSizes, BaseChannel.SendFileMessageWithProgressHandler handler)` Sends a file with given file information and gets callback for uploading progress.
`FileMessage`	`sendFileMessage(java.lang.String fileUrl, java.lang.String name, java.lang.String type, int size, java.lang.String data, BaseChannel.SendFileMessageHandler handler)` Sends a file with given file information.
`FileMessage`	`sendFileMessage(java.lang.String fileUrl, java.lang.String name, java.lang.String type, int size, java.lang.String data, java.lang.String customType, BaseChannel.SendFileMessageHandler handler)` Sends a file with given file information.
`java.util.List<FileMessage>`	`sendFileMessages(java.util.List<FileMessageParams> params, BaseChannel.SendFileMessagesHandler handler)` Sends files with given files information.
`java.util.List<FileMessage>`	`sendFileMessages(java.util.List<FileMessageParams> params, BaseChannel.SendFileMessagesWithProgressHandler handler)` Sends files with given files information and gets callback for uploading progress.
`UserMessage`	`sendUserMessage(java.lang.String message, BaseChannel.SendUserMessageHandler handler)` Sends a user message.
`UserMessage`	`sendUserMessage(java.lang.String message, java.lang.String data, BaseChannel.SendUserMessageHandler handler)` Deprecated. As of 3.0.75, replaced by `sendUserMessage(UserMessageParams, SendUserMessageHandler)`
`UserMessage`	`sendUserMessage(java.lang.String message, java.lang.String data, java.lang.String customType, BaseChannel.SendUserMessageHandler handler)` Deprecated. As of 3.0.75, replaced by `sendUserMessage(UserMessageParams, SendUserMessageHandler)`
`UserMessage`	`sendUserMessage(java.lang.String message, java.lang.String data, java.lang.String customType, java.util.List<java.lang.String> targetLanguages, BaseChannel.SendUserMessageHandler handler)` Sends a user message.
`UserMessage`	`sendUserMessage(UserMessageParams params, BaseChannel.SendUserMessageHandler handler)` Sends a user message.
`byte[]`	`serialize()` Serializes the `GroupChannel` or `OpenChannel` instance.
`java.lang.String`	`toString()`
`void`	`translateUserMessage(UserMessage userMessage, java.util.List<java.lang.String> targetLanguages, BaseChannel.TranslateUserMessageHandler handler)` Translates a user message.
`void`	`updateFileMessage(long messageId, FileMessageParams params, BaseChannel.UpdateFileMessageHandler handler)` Updates a `FileMessage` that was previously sent in the channel.
`void`	`updateFileMessage(long messageId, java.lang.String data, java.lang.String customType, BaseChannel.UpdateFileMessageHandler handler)` Updates a `FileMessage` that was previously sent in the channel.
`void`	`updateMetaCounters(java.util.Map<java.lang.String,java.lang.Integer> metaCounterMap, BaseChannel.MetaCounterHandler handler)` Updates meta counters.
`void`	`updateMetaData(java.util.Map<java.lang.String,java.lang.String> metaDataMap, BaseChannel.MetaDataHandler handler)` Updates meta data.
`void`	`updateUserMessage(long messageId, java.lang.String body, java.lang.String data, java.lang.String customType, BaseChannel.UpdateUserMessageHandler handler)` Updates a `UserMessage` that was previously sent in the channel.
`void`	`updateUserMessage(long messageId, UserMessageParams params, BaseChannel.UpdateUserMessageHandler handler)` Updates a `UserMessage` that was previously sent in the channel.

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Method Detail
  - buildFromSerializedData
```
public static BaseChannel buildFromSerializedData(byte[] data)
```
    Builds GroupChannel or OpenChannel instance from serialized data generated by serialize().
    
    Parameters:
    
    data - Serialized GroupChannel or OpenChannel data.
    
    Returns:
    
    GroupChannel or OpenChannel instance.
    
    Since:
    
    3.0.19
  - serialize
```
public byte[] serialize()
```
    Serializes the GroupChannel or OpenChannel instance. This byte array can be stored in the database in your application. The instance can be restored by buildFromSerializedData(byte[]).
    
    Returns:
    
    Serialized GroupChannel or OpenChannel data.
    
    Since:
    
    3.0.19
  - getData
```
public java.lang.String getData()
```
    Returns channel data.
    
    Returns:
    
    String data.
  - getUrl
```
public java.lang.String getUrl()
```
    Returns unique channel URL.
    
    Returns:
    
    The URL.
  - getCreatedAt
```
public long getCreatedAt()
```
    Returns channel creation time.
    
    Returns:
    
    Timestamp in milliseconds.
  - getName
```
public java.lang.String getName()
```
    Returns topic or name of the channel.
    
    Returns:
    
    Channel name.
  - getCoverUrl
```
public java.lang.String getCoverUrl()
```
    Returns cover image URL.
    
    Returns:
    
    The image URL.
  - isOpenChannel
```
public boolean isOpenChannel()
```
    Checks whether the instance is OpenChannel type.
    
    Returns:
    
    Returns true if the channel is OpenChannel type.
  - isGroupChannel
```
public boolean isGroupChannel()
```
    Checks whether the instance is GroupChannel type.
    
    Returns:
    
    Returns true if the channel is GroupChannel type.
  - isFrozen
```
public boolean isFrozen()
```
    Checks if this channel is frozen.
    
    Returns:
    
    true if this channel is frozen.
    
    Since:
    
    3.0.51
  - isEphemeral
```
public boolean isEphemeral()
```
    Checks if this channel is ephemeral.
    
    Returns:
    
    true if this channel is ephemeral.
    
    Since:
    
    3.0.52
  - createPreviousMessageListQuery
```
public PreviousMessageListQuery createPreviousMessageListQuery()
```
    Creates previous message list query for this channel.
    
    Returns:
    
    Query to use.
  - createMessageListQuery
```
@Deprecated
public MessageListQuery createMessageListQuery()
```
    Deprecated. As of 3.0.25, replaced by getNextMessagesByTimestamp(long, boolean, int, boolean, MessageTypeFilter, String, List, boolean, boolean, GetMessagesHandler), getPreviousMessagesByTimestamp(long, boolean, int, boolean, MessageTypeFilter, String, List, boolean, boolean, GetMessagesHandler).
    
    Creates message list query for this channel.
    
    Returns:
    
    Query to use.
  - createOperatorListQuery
```
public OperatorListQuery createOperatorListQuery()
```
    Creates a query instance to get the operator list from this channel.
    
    Returns:
    
    Query to use.
    
    Since:
    
    3.0.57
  - getMessagesByMessageId
```
public void getMessagesByMessageId(long messageId,
                                   MessageListParams params,
                                   BaseChannel.GetMessagesHandler handler)
```
    Retrieves previous or next messages based on the message ID in a specific channel. The result is passed to handler as list.
    
    Parameters:
    
    messageId - Specifies the message ID to be the reference point for messages to retrieve.
    
    params - Params for getting message list. See MessageListParams
    
    handler - Callback handler.
    
    Since:
    
    3.0.130
  - getMessagesByTimestamp
```
public void getMessagesByTimestamp(long ts,
                                   MessageListParams params,
                                   BaseChannel.GetMessagesHandler handler)
```
    Retrieves previous or next messages based on the timestamp in a specific channel. The result is passed to handler as list.
    
    Parameters:
    
    ts - Specifies the timestamp to be the reference point for messages to retrieve, in Unix milliseconds format.
    
    params - Params for getting message list. See MessageListParams
    
    handler - Callback handler.
    
    Since:
    
    3.0.130
  - getNextMessagesByTimestamp
```
public void getNextMessagesByTimestamp(long ts,
                                       boolean isInclusive,
                                       int nextResultSize,
                                       boolean reverse,
                                       BaseChannel.MessageTypeFilter messageType,
                                       java.lang.String customType,
                                       BaseChannel.GetMessagesHandler handler)
```
    Requests the next messages from given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created after this timestamp will be returned.
    
    isInclusive - Whether messages sent exactly on the timestamp should be loaded.
    
    nextResultSize - The number of messages sent after the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    handler - Callback handler.
    
    Since:
    
    3.0.20
  - getNextMessagesByTimestamp
```
public void getNextMessagesByTimestamp(long ts,
                                       boolean isInclusive,
                                       int nextResultSize,
                                       boolean reverse,
                                       BaseChannel.MessageTypeFilter messageType,
                                       java.lang.String customType,
                                       java.util.List<java.lang.String> senderUserIds,
                                       BaseChannel.GetMessagesHandler handler)
```
    Requests the next messages from given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created after this timestamp will be returned.
    
    isInclusive - Whether messages sent exactly on the timestamp should be loaded.
    
    nextResultSize - The number of messages sent after the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    handler - Callback handler.
    
    Since:
    
    3.0.66
  - getNextMessagesByTimestamp
```
public void getNextMessagesByTimestamp(long ts,
                                       boolean isInclusive,
                                       int nextResultSize,
                                       boolean reverse,
                                       BaseChannel.MessageTypeFilter messageType,
                                       java.lang.String customType,
                                       java.util.List<java.lang.String> senderUserIds,
                                       boolean includeMetaArray,
                                       BaseChannel.GetMessagesHandler handler)
```
    Requests the next messages from given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created after this timestamp will be returned.
    
    isInclusive - Whether messages sent exactly on the timestamp should be loaded.
    
    nextResultSize - The number of messages sent after the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - getNextMessagesByTimestamp
```
public void getNextMessagesByTimestamp(long ts,
                                       boolean isInclusive,
                                       int nextResultSize,
                                       boolean reverse,
                                       BaseChannel.MessageTypeFilter messageType,
                                       java.lang.String customType,
                                       java.util.List<java.lang.String> senderUserIds,
                                       boolean includeMetaArray,
                                       boolean includeReactions,
                                       BaseChannel.GetMessagesHandler handler)
```
    Requests the next messages from given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created after this timestamp will be returned.
    
    isInclusive - Whether messages sent exactly on the timestamp should be loaded.
    
    nextResultSize - The number of messages sent after the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    includeReactions - If true the result will be returned with message reactions.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - getPreviousMessagesByTimestamp
```
public void getPreviousMessagesByTimestamp(long ts,
                                           boolean isInclusive,
                                           int prevResultSize,
                                           boolean reverse,
                                           BaseChannel.MessageTypeFilter messageType,
                                           java.lang.String customType,
                                           BaseChannel.GetMessagesHandler handler)
```
    Requests the previous messages from given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created before this timestamp will be returned.
    
    isInclusive - Whether messages sent exactly on the timestamp should be loaded.
    
    prevResultSize - The number of messages sent to prior to the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    handler - Callback handler.
    
    Since:
    
    3.0.20
  - getPreviousMessagesByTimestamp
```
public void getPreviousMessagesByTimestamp(long ts,
                                           boolean isInclusive,
                                           int prevResultSize,
                                           boolean reverse,
                                           BaseChannel.MessageTypeFilter messageType,
                                           java.lang.String customType,
                                           java.util.List<java.lang.String> senderUserIds,
                                           BaseChannel.GetMessagesHandler handler)
```
    Requests the previous messages from given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created before this timestamp will be returned.
    
    isInclusive - Whether messages sent exactly on the timestamp should be loaded.
    
    prevResultSize - The number of messages sent to prior to the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    handler - Callback handler.
    
    Since:
    
    3.0.66
  - getPreviousMessagesByTimestamp
```
public void getPreviousMessagesByTimestamp(long ts,
                                           boolean isInclusive,
                                           int prevResultSize,
                                           boolean reverse,
                                           BaseChannel.MessageTypeFilter messageType,
                                           java.lang.String customType,
                                           java.util.List<java.lang.String> senderUserIds,
                                           boolean includeMetaArray,
                                           BaseChannel.GetMessagesHandler handler)
```
    Requests the previous messages from given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created before this timestamp will be returned.
    
    isInclusive - Whether messages sent exactly on the timestamp should be loaded.
    
    prevResultSize - The number of messages sent to prior to the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - getPreviousMessagesByTimestamp
```
public void getPreviousMessagesByTimestamp(long ts,
                                           boolean isInclusive,
                                           int prevResultSize,
                                           boolean reverse,
                                           BaseChannel.MessageTypeFilter messageType,
                                           java.lang.String customType,
                                           java.util.List<java.lang.String> senderUserIds,
                                           boolean includeMetaArray,
                                           boolean includeReactions,
                                           BaseChannel.GetMessagesHandler handler)
```
    Requests the previous messages from given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created before this timestamp will be returned.
    
    isInclusive - Whether messages sent exactly on the timestamp should be loaded.
    
    prevResultSize - The number of messages sent to prior to the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    includeReactions - If true the result will be returned with message reactions.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - getPreviousAndNextMessagesByTimestamp
```
public void getPreviousAndNextMessagesByTimestamp(long ts,
                                                  int prevResultSize,
                                                  int nextResultSize,
                                                  boolean reverse,
                                                  BaseChannel.MessageTypeFilter messageType,
                                                  java.lang.String customType,
                                                  BaseChannel.GetMessagesHandler handler)
```
    Requests the messages created before and after the given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created before and after this timestamp will be returned.
    
    prevResultSize - The number of messages sent to prior to the timestamp that should be loaded.
    
    nextResultSize - The number of messages sent after the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    handler - Callback handler.
    
    Since:
    
    3.0.20
  - getPreviousAndNextMessagesByTimestamp
```
public void getPreviousAndNextMessagesByTimestamp(long ts,
                                                  int prevResultSize,
                                                  int nextResultSize,
                                                  boolean reverse,
                                                  BaseChannel.MessageTypeFilter messageType,
                                                  java.lang.String customType,
                                                  java.util.List<java.lang.String> senderUserIds,
                                                  BaseChannel.GetMessagesHandler handler)
```
    Requests the messages created before and after the given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created before and after this timestamp will be returned.
    
    prevResultSize - The number of messages sent to prior to the timestamp that should be loaded.
    
    nextResultSize - The number of messages sent after the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    handler - Callback handler.
    
    Since:
    
    3.0.66
  - getPreviousAndNextMessagesByTimestamp
```
public void getPreviousAndNextMessagesByTimestamp(long ts,
                                                  int prevResultSize,
                                                  int nextResultSize,
                                                  boolean reverse,
                                                  BaseChannel.MessageTypeFilter messageType,
                                                  java.lang.String customType,
                                                  java.util.List<java.lang.String> senderUserIds,
                                                  boolean includeMetaArray,
                                                  BaseChannel.GetMessagesHandler handler)
```
    Requests the messages created before and after the given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created before and after this timestamp will be returned.
    
    prevResultSize - The number of messages sent to prior to the timestamp that should be loaded.
    
    nextResultSize - The number of messages sent after the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - getPreviousAndNextMessagesByTimestamp
```
public void getPreviousAndNextMessagesByTimestamp(long ts,
                                                  int prevResultSize,
                                                  int nextResultSize,
                                                  boolean reverse,
                                                  BaseChannel.MessageTypeFilter messageType,
                                                  java.lang.String customType,
                                                  java.util.List<java.lang.String> senderUserIds,
                                                  boolean includeMetaArray,
                                                  boolean includeReactions,
                                                  BaseChannel.GetMessagesHandler handler)
```
    Requests the messages created before and after the given timestamp. The result is passed to handler as list.
    
    Parameters:
    
    ts - Starting message timestamp to load. Messages created before and after this timestamp will be returned.
    
    prevResultSize - The number of messages sent to prior to the timestamp that should be loaded.
    
    nextResultSize - The number of messages sent after the timestamp that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    includeReactions - If true the result will be returned with message reactions.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - getNextMessagesById
```
public void getNextMessagesById(long msgId,
                                boolean isInclusive,
                                int nextResultSize,
                                boolean reverse,
                                BaseChannel.MessageTypeFilter messageType,
                                java.lang.String customType,
                                BaseChannel.GetMessagesHandler handler)
```
    Requests the next messages from given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages have greater than this ID will be returned.
    
    isInclusive - Whether the message exactly on the ID should be loaded.
    
    nextResultSize - The number of messages sent after the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    handler - Callback handler.
    
    Since:
    
    3.0.20
  - getNextMessagesById
```
public void getNextMessagesById(long msgId,
                                boolean isInclusive,
                                int nextResultSize,
                                boolean reverse,
                                BaseChannel.MessageTypeFilter messageType,
                                java.lang.String customType,
                                java.util.List<java.lang.String> senderUserIds,
                                BaseChannel.GetMessagesHandler handler)
```
    Requests the next messages from given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages have greater than this ID will be returned.
    
    isInclusive - Whether the message exactly on the ID should be loaded.
    
    nextResultSize - The number of messages sent after the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    handler - Callback handler.
    
    Since:
    
    3.0.66
  - getNextMessagesById
```
public void getNextMessagesById(long msgId,
                                boolean isInclusive,
                                int nextResultSize,
                                boolean reverse,
                                BaseChannel.MessageTypeFilter messageType,
                                java.lang.String customType,
                                java.util.List<java.lang.String> senderUserIds,
                                boolean includeMetaArray,
                                BaseChannel.GetMessagesHandler handler)
```
    Requests the next messages from given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages have greater than this ID will be returned.
    
    isInclusive - Whether the message exactly on the ID should be loaded.
    
    nextResultSize - The number of messages sent after the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - getNextMessagesById
```
public void getNextMessagesById(long msgId,
                                boolean isInclusive,
                                int nextResultSize,
                                boolean reverse,
                                BaseChannel.MessageTypeFilter messageType,
                                java.lang.String customType,
                                java.util.List<java.lang.String> senderUserIds,
                                boolean includeMetaArray,
                                boolean includeReactions,
                                BaseChannel.GetMessagesHandler handler)
```
    Requests the next messages from given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages have greater than this ID will be returned.
    
    isInclusive - Whether the message exactly on the ID should be loaded.
    
    nextResultSize - The number of messages sent after the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    includeReactions - If true the result will be returned with message reactions.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - getPreviousMessagesById
```
public void getPreviousMessagesById(long msgId,
                                    boolean isInclusive,
                                    int prevResultSize,
                                    boolean reverse,
                                    BaseChannel.MessageTypeFilter messageType,
                                    java.lang.String customType,
                                    BaseChannel.GetMessagesHandler handler)
```
    Requests the previous messages from given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages have less than this ID will be returned.
    
    isInclusive - Whether the message exactly on the ID should be loaded.
    
    prevResultSize - The number of messages sent to prior to the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    handler - Callback handler.
    
    Since:
    
    3.0.20
  - getPreviousMessagesById
```
public void getPreviousMessagesById(long msgId,
                                    boolean isInclusive,
                                    int prevResultSize,
                                    boolean reverse,
                                    BaseChannel.MessageTypeFilter messageType,
                                    java.lang.String customType,
                                    java.util.List<java.lang.String> senderUserIds,
                                    BaseChannel.GetMessagesHandler handler)
```
    Requests the previous messages from given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages have less than this ID will be returned.
    
    isInclusive - Whether the message exactly on the ID should be loaded.
    
    prevResultSize - The number of messages sent to prior to the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    handler - Callback handler.
    
    Since:
    
    3.0.66
  - getPreviousMessagesById
```
public void getPreviousMessagesById(long msgId,
                                    boolean isInclusive,
                                    int prevResultSize,
                                    boolean reverse,
                                    BaseChannel.MessageTypeFilter messageType,
                                    java.lang.String customType,
                                    java.util.List<java.lang.String> senderUserIds,
                                    boolean includeMetaArray,
                                    BaseChannel.GetMessagesHandler handler)
```
    Requests the previous messages from given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages have less than this ID will be returned.
    
    isInclusive - Whether the message exactly on the ID should be loaded.
    
    prevResultSize - The number of messages sent to prior to the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - getPreviousMessagesById
```
public void getPreviousMessagesById(long msgId,
                                    boolean isInclusive,
                                    int prevResultSize,
                                    boolean reverse,
                                    BaseChannel.MessageTypeFilter messageType,
                                    java.lang.String customType,
                                    java.util.List<java.lang.String> senderUserIds,
                                    boolean includeMetaArray,
                                    boolean includeReactions,
                                    BaseChannel.GetMessagesHandler handler)
```
    Requests the previous messages from given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages have less than this ID will be returned.
    
    isInclusive - Whether the message exactly on the ID should be loaded.
    
    prevResultSize - The number of messages sent to prior to the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    includeReactions - If true the result will be returned with message reactions.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - getPreviousAndNextMessagesById
```
public void getPreviousAndNextMessagesById(long msgId,
                                           int prevResultSize,
                                           int nextResultSize,
                                           boolean reverse,
                                           BaseChannel.MessageTypeFilter messageType,
                                           java.lang.String customType,
                                           BaseChannel.GetMessagesHandler handler)
```
    Requests the messages created earlier or later than the given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages created before and after the ID will be returned.
    
    prevResultSize - The number of messages sent to prior to the ID that should be loaded.
    
    nextResultSize - The number of messages sent after the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    handler - Callback handler.
    
    Since:
    
    3.0.20
  - getPreviousAndNextMessagesById
```
public void getPreviousAndNextMessagesById(long msgId,
                                           int prevResultSize,
                                           int nextResultSize,
                                           boolean reverse,
                                           BaseChannel.MessageTypeFilter messageType,
                                           java.lang.String customType,
                                           java.util.List<java.lang.String> senderUserIds,
                                           BaseChannel.GetMessagesHandler handler)
```
    Requests the messages created earlier or later than the given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages created before and after the ID will be returned.
    
    prevResultSize - The number of messages sent to prior to the ID that should be loaded.
    
    nextResultSize - The number of messages sent after the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    handler - Callback handler.
    
    Since:
    
    3.0.66
  - getPreviousAndNextMessagesById
```
public void getPreviousAndNextMessagesById(long msgId,
                                           int prevResultSize,
                                           int nextResultSize,
                                           boolean reverse,
                                           BaseChannel.MessageTypeFilter messageType,
                                           java.lang.String customType,
                                           java.util.List<java.lang.String> senderUserIds,
                                           boolean includeMetaArray,
                                           BaseChannel.GetMessagesHandler handler)
```
    Requests the messages created earlier or later than the given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages created before and after the ID will be returned.
    
    prevResultSize - The number of messages sent to prior to the ID that should be loaded.
    
    nextResultSize - The number of messages sent after the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - getPreviousAndNextMessagesById
```
public void getPreviousAndNextMessagesById(long msgId,
                                           int prevResultSize,
                                           int nextResultSize,
                                           boolean reverse,
                                           BaseChannel.MessageTypeFilter messageType,
                                           java.lang.String customType,
                                           java.util.List<java.lang.String> senderUserIds,
                                           boolean includeMetaArray,
                                           boolean includeReactions,
                                           BaseChannel.GetMessagesHandler handler)
```
    Requests the messages created earlier or later than the given ID. The result is passed to handler as list.
    
    Parameters:
    
    msgId - Starting message ID to load. Messages created before and after the ID will be returned.
    
    prevResultSize - The number of messages sent to prior to the ID that should be loaded.
    
    nextResultSize - The number of messages sent after the ID that should be loaded.
    
    reverse - If true the result will be returned by creation time descending order.
    
    messageType - Returns messages whose type matches BaseChannel.MessageTypeFilter.
    
    customType - Returns messages that have a matching custom type. If left blank, messages of all custom types are returned.
    
    senderUserIds - Returns messages whose sender user id matches sender user ids.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    includeReactions - If true the result will be returned with message reactions.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - getMessageChangeLogsByToken
```
public void getMessageChangeLogsByToken(java.lang.String token,
                                        BaseChannel.GetMessageChangeLogsByTokenHandler handler)
```
    Requests the message changelogs from given token. The result is passed to handler.
    
    Parameters:
    
    token - Token to get next message changelogs. If the token is null, the result will be passed from the beginning.
    
    handler - Callback handler.
    
    Since:
    
    3.0.36
  - getMessageChangeLogsByToken
```
public void getMessageChangeLogsByToken(java.lang.String token,
                                        boolean includeMetaArray,
                                        BaseChannel.GetMessageChangeLogsByTokenHandler handler)
```
    Requests the message changelogs from given token. The result is passed to handler.
    
    Parameters:
    
    token - Token to get next message changelogs. If the token is null, the result will be passed from the beginning.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - getMessageChangeLogsByToken
```
public void getMessageChangeLogsByToken(java.lang.String token,
                                        boolean includeMetaArray,
                                        boolean includeReactions,
                                        BaseChannel.GetMessageChangeLogsHandler handler)
```
    Requests message change logs after given timestamp. The result is passed to handler.
    
    Parameters:
    
    token - Token to get next message changelogs. If the token is null, the result will be passed from the beginning.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    includeReactions - If true the result will be returned with message reactions.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - getMessageChangeLogsSinceToken
```
public void getMessageChangeLogsSinceToken(java.lang.String token,
                                           MessageChangeLogsParams params,
                                           BaseChannel.GetMessageChangeLogsHandler handler)
```
    Requests message change logs after given token. The result is passed to handler.
    
    Parameters:
    
    token - Specifies the token to be the reference point for the changelogs to retrieve. If the token is null, the result will be passed from the beginning.
    
    params - Params for getting change logs. See MessageChangeLogsParams
    
    handler - Callback handler.
    
    Since:
    
    3.0.130
  - getMessageChangeLogsByTimestamp
```
public void getMessageChangeLogsByTimestamp(long ts,
                                            BaseChannel.GetMessageChangeLogsHandler handler)
```
    Requests message change logs after given timestamp. The result is passed to handler.
    
    Parameters:
    
    ts - Specifies the timestamp to be the reference point for changelogs to retrieve, in Unix milliseconds format.
    
    handler - Callback handler.
    
    Since:
    
    3.0.83
  - getMessageChangeLogsByTimestamp
```
public void getMessageChangeLogsByTimestamp(long ts,
                                            boolean includeMetaArray,
                                            BaseChannel.GetMessageChangeLogsHandler handler)
```
    Requests message change logs after given timestamp. The result is passed to handler.
    
    Parameters:
    
    ts - Timestamp to load change logs. Change logs after this timestamp will be returned.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    handler - Callback handler.
    
    Since:
    
    3.0.83
  - getMessageChangeLogsByTimestamp
```
public void getMessageChangeLogsByTimestamp(long ts,
                                            boolean includeMetaArray,
                                            boolean includeReactions,
                                            BaseChannel.GetMessageChangeLogsHandler handler)
```
    Requests message change logs after given timestamp. The result is passed to handler.
    
    Parameters:
    
    ts - Timestamp to load change logs. Change logs after this timestamp will be returned.
    
    includeMetaArray - If true the result will be returned with message meta array.
    
    includeReactions - If true the result will be returned with message reactions.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - getMessageChangeLogsSinceTimestamp
```
public void getMessageChangeLogsSinceTimestamp(long ts,
                                               MessageChangeLogsParams params,
                                               BaseChannel.GetMessageChangeLogsHandler handler)
```
    Requests message change logs after given timestamp. The result is passed to handler.
    
    Parameters:
    
    ts - Timestamp to load change logs. Change logs after this timestamp will be returned.
    
    params - Params for getting change logs. See MessageChangeLogsParams
    
    handler - Callback handler.
    
    Since:
    
    3.0.130
  - sendFileMessage
```
public FileMessage sendFileMessage(java.lang.String fileUrl,
                                   java.lang.String name,
                                   java.lang.String type,
                                   int size,
                                   java.lang.String data,
                                   BaseChannel.SendFileMessageHandler handler)
```
    Sends a file with given file information. File size value will only be used when sending a file message with a url. When sending a file message with local file, Sendbird calculates the file size on your behalf and file size value will be ignored.
    
    Parameters:
    
    fileUrl - URL of file to be sent.
    
    name - File name.
    
    type - File type. MIME is preferred.
    
    size - File size.
    
    data - Custom field. This can be used to customize the message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
  - sendFileMessage
```
public FileMessage sendFileMessage(java.lang.String fileUrl,
                                   java.lang.String name,
                                   java.lang.String type,
                                   int size,
                                   java.lang.String data,
                                   java.lang.String customType,
                                   BaseChannel.SendFileMessageHandler handler)
```
    Sends a file with given file information. File size value will only be used when sending a file message with a url. When sending a file message with local file, Sendbird calculates the file size on your behalf and file size value will be ignored.
    
    Parameters:
    
    fileUrl - URL of file to be sent.
    
    name - File name.
    
    type - File type. MIME is preferred.
    
    size - File size.
    
    data - Custom field. This can be used to customize the message.
    
    customType - Custom type. This can be used to set custom type of the message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
    
    Since:
    
    3.0.5
  - sendFileMessage
```
public FileMessage sendFileMessage(java.io.File file,
                                   java.lang.String name,
                                   java.lang.String type,
                                   int size,
                                   java.lang.String data,
                                   BaseChannel.SendFileMessageHandler handler)
```
    Sends a file with given file information. File size value will only be used when sending a file message with a url. When sending a file message with local file, Sendbird calculates the file size on your behalf and file size value will be ignored.
    
    Parameters:
    
    file - File to be sent.
    
    name - File name.
    
    type - File type. MIME is preferred.
    
    size - File size.
    
    data - Custom field. This can be used to customize the message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
  - sendFileMessage
```
@Deprecated
public FileMessage sendFileMessage(java.io.File file,
                                               java.lang.String name,
                                               java.lang.String type,
                                               int size,
                                               java.lang.String data,
                                               java.lang.String customType,
                                               BaseChannel.SendFileMessageHandler handler)
```
    Deprecated. As of 3.0.75, replaced by sendFileMessage(FileMessageParams, SendFileMessageHandler)
    
    Sends a file with given file information. File size value will only be used when sending a file message with a url. When sending a file message with local file, Sendbird calculates the file size on your behalf and file size value will be ignored.
    
    Parameters:
    
    file - File to be sent.
    
    name - File name.
    
    type - File type. MIME is preferred.
    
    size - File size.
    
    data - Custom field. This can be used to customize the message.
    
    customType - Custom type. This can be used to set custom type of the message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
    
    Since:
    
    3.0.5
  - sendFileMessage
```
public FileMessage sendFileMessage(java.io.File file,
                                   java.lang.String name,
                                   java.lang.String type,
                                   int size,
                                   java.lang.String data,
                                   java.lang.String customType,
                                   java.util.List<FileMessage.ThumbnailSize> thumbnailSizes,
                                   BaseChannel.SendFileMessageHandler handler)
```
    Sends a file with given file information. File size value will only be used when sending a file message with a url. When sending a file message with local file, Sendbird calculates the file size on your behalf and file size value will be ignored.
    
    Parameters:
    
    file - File to be sent.
    
    name - File name.
    
    type - File type. MIME is preferred.
    
    size - File size.
    
    data - Custom field. This can be used to customize the message.
    
    customType - Custom type. This can be used to set custom type of the message.
    
    thumbnailSizes - Thumbnail sizes to be generated. If you want to automatically generate thumbnails of the file to be sent, pass this option as a List of FileMessage.ThumbnailSize.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
    
    Since:
    
    3.0.14
  - sendFileMessage
```
public FileMessage sendFileMessage(java.io.File file,
                                   java.lang.String name,
                                   java.lang.String type,
                                   int size,
                                   java.lang.String data,
                                   BaseChannel.SendFileMessageWithProgressHandler handler)
```
    Sends a file with given file information and gets callback for uploading progress. File size value will only be used when sending a file message with a url. When sending a file message with local file, Sendbird calculates the file size on your behalf and file size value will be ignored.
    
    Parameters:
    
    file - File to be sent.
    
    name - File name.
    
    type - File type. MIME is preferred.
    
    size - File size.
    
    data - Custom field. This can be used to customize the message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
    
    Since:
    
    3.0.23
  - sendFileMessage
```
@Deprecated
public FileMessage sendFileMessage(java.io.File file,
                                               java.lang.String name,
                                               java.lang.String type,
                                               int size,
                                               java.lang.String data,
                                               java.lang.String customType,
                                               BaseChannel.SendFileMessageWithProgressHandler handler)
```
    Deprecated. As of 3.0.75, replaced by sendFileMessage(FileMessageParams, SendFileMessageWithProgressHandler)
    
    Sends a file with given file information and gets callback for uploading progress. File size value will only be used when sending a file message with a url. When sending a file message with local file, Sendbird calculates the file size on your behalf and file size value will be ignored.
    
    Parameters:
    
    file - File to be sent.
    
    name - File name.
    
    type - File type. MIME is preferred.
    
    size - File size.
    
    data - Custom field. This can be used to customize the message.
    
    customType - Custom type. This can be used to set custom type of the message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
    
    Since:
    
    3.0.23
  - sendFileMessage
```
public FileMessage sendFileMessage(java.io.File file,
                                   java.lang.String name,
                                   java.lang.String type,
                                   int size,
                                   java.lang.String data,
                                   java.lang.String customType,
                                   java.util.List<FileMessage.ThumbnailSize> thumbnailSizes,
                                   BaseChannel.SendFileMessageWithProgressHandler handler)
```
    Sends a file with given file information and gets callback for uploading progress. File size value will only be used when sending a file message with a url. When sending a file message with local file, Sendbird calculates the file size on your behalf and file size value will be ignored.
    
    Parameters:
    
    file - File to be sent.
    
    name - File name.
    
    type - File type. MIME is preferred.
    
    size - File size.
    
    data - Custom field. This can be used to customize the message.
    
    customType - Custom type. This can be used to set custom type of the message.
    
    thumbnailSizes - Thumbnail sizes to be generated. If you want to automatically generate thumbnails of the file to be sent, pass this option as a List of FileMessage.ThumbnailSize.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
    
    Since:
    
    3.0.23
  - sendFileMessage
```
public FileMessage sendFileMessage(FileMessageParams params,
                                   BaseChannel.SendFileMessageHandler handler)
```
    Sends a file with given file information.
    
    Parameters:
    
    params - Params of file message. Refer to FileMessageParams.
    
    handler - Callback handler.
    
    Returns:
    
    FileMessage instance with request ID.
    
    Since:
    
    3.0.52
  - sendFileMessage
```
public FileMessage sendFileMessage(FileMessageParams params,
                                   BaseChannel.SendFileMessageWithProgressHandler handler)
```
    Sends a file with given file information and gets callback for uploading progress.
    
    Parameters:
    
    params - Params of file message. Refer to FileMessageParams.
    
    handler - Callback handler.
    
    Returns:
    
    FileMessage instance with request ID.
    
    Since:
    
    3.0.52
  - sendFileMessages
```
public java.util.List<FileMessage> sendFileMessages(java.util.List<FileMessageParams> params,
                                                    BaseChannel.SendFileMessagesHandler handler)
```
    Sends files with given files information. The maximum number of files is 20.
    
    Parameters:
    
    params - List of params of file message. Refer to FileMessageParams.
    
    handler - Callback handler.
    
    Returns:
    
    List of FileMessage instance with request ID.
    
    Since:
    
    3.0.76
  - sendFileMessages
```
public java.util.List<FileMessage> sendFileMessages(java.util.List<FileMessageParams> params,
                                                    BaseChannel.SendFileMessagesWithProgressHandler handler)
```
    Sends files with given files information and gets callback for uploading progress. The maximum number of files is 20. This method handles FileMessageParams only which have set binary file not URL.
    
    Parameters:
    
    params - List of params of file message. Refer to FileMessageParams.
    
    handler - Callback handler.
    
    Returns:
    
    List of FileMessage instance with request ID.
    
    Since:
    
    3.0.76
  - sendUserMessage
```
public UserMessage sendUserMessage(java.lang.String message,
                                   BaseChannel.SendUserMessageHandler handler)
```
    Sends a user message.
    
    Parameters:
    
    message - String message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary UserMessage instance with request ID.
  - sendUserMessage
```
@Deprecated
public UserMessage sendUserMessage(java.lang.String message,
                                               java.lang.String data,
                                               BaseChannel.SendUserMessageHandler handler)
```
    Deprecated. As of 3.0.75, replaced by sendUserMessage(UserMessageParams, SendUserMessageHandler)
    
    Sends a user message.
    
    Parameters:
    
    message - String message.
    
    data - Custom field. This can be used to customize the message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary UserMessage instance with request ID.
  - sendUserMessage
```
@Deprecated
public UserMessage sendUserMessage(java.lang.String message,
                                               java.lang.String data,
                                               java.lang.String customType,
                                               BaseChannel.SendUserMessageHandler handler)
```
    Deprecated. As of 3.0.75, replaced by sendUserMessage(UserMessageParams, SendUserMessageHandler)
    
    Sends a user message.
    
    Parameters:
    
    message - String message.
    
    data - Custom field. This can be used to customize the message.
    
    customType - Custom type. This can be used to set custom type of the message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary UserMessage instance with request ID.
    
    Since:
    
    3.0.5
  - sendUserMessage
```
public UserMessage sendUserMessage(java.lang.String message,
                                   java.lang.String data,
                                   java.lang.String customType,
                                   java.util.List<java.lang.String> targetLanguages,
                                   BaseChannel.SendUserMessageHandler handler)
```
    Sends a user message.
    
    Parameters:
    
    message - String message.
    
    data - Custom field. This can be used to customize the message.
    
    customType - Custom type. This can be used to set custom type of the message.
    
    targetLanguages - Target language codes (for example "es" for spanish) the message will be translated to.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary UserMessage instance with request ID.
    
    Since:
    
    3.0.6
  - sendUserMessage
```
public UserMessage sendUserMessage(UserMessageParams params,
                                   BaseChannel.SendUserMessageHandler handler)
```
    Sends a user message.
    
    Parameters:
    
    params - Params of user message. Refer to UserMessageParams.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary UserMessage instance with request ID.
    
    Since:
    
    3.0.52
  - resendMessage
```
public UserMessage resendMessage(UserMessage userMessage,
                                 BaseChannel.ResendUserMessageHandler handler)
```
    Resends a failed user message.
    
    Parameters:
    
    userMessage - Failed user message.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary UserMessage instance with request ID.
    
    Since:
    
    3.0.121
  - resendMessage
```
public FileMessage resendMessage(FileMessage fileMessage,
                                 java.io.File file,
                                 BaseChannel.ResendFileMessageHandler handler)
```
    Resends a file with given file information.
    
    Parameters:
    
    fileMessage - Failed fileMessage.
    
    file - File to resend. If there is a file url in fileMessage, this will be ignored.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
    
    Since:
    
    3.0.121
  - resendMessage
```
public FileMessage resendMessage(FileMessage fileMessage,
                                 java.io.File file,
                                 BaseChannel.ResendFileMessageWithProgressHandler handler)
```
    Resends a file with given file information and gets callback for uploading progress.
    
    Parameters:
    
    fileMessage - Failed file message.
    
    file - File to resend. If there is a file url in fileMessage, this will be ignored.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
    
    Since:
    
    3.0.121
  - resendFileMessage
```
public void resendFileMessage(FileMessage fileMessage,
                              java.io.File file,
                              BaseChannel.ResendFileMessageHandler handler)
```
    Resends a file with given file information.
    
    Parameters:
    
    fileMessage - Failed fileMessage.
    
    file - File to resend. If there is a file url in fileMessage, this will be ignored.
    
    handler - Callback handler.
    
    Since:
    
    3.0.99
  - resendFileMessage
```
public void resendFileMessage(FileMessage fileMessage,
                              java.io.File file,
                              BaseChannel.ResendFileMessageWithProgressHandler handler)
```
    Resends a file with given file information and gets callback for uploading progress.
    
    Parameters:
    
    fileMessage - Failed file message.
    
    file - File to resend. If there is a file url in fileMessage, this will be ignored.
    
    handler - Callback handler.
    
    Since:
    
    3.0.99
  - resendUserMessage
```
public void resendUserMessage(UserMessage userMessage,
                              BaseChannel.ResendUserMessageHandler handler)
```
    Resends a failed user message.
    
    Parameters:
    
    userMessage - Failed user message.
    
    handler - Callback handler.
    
    Since:
    
    3.0.96
  - translateUserMessage
```
public void translateUserMessage(UserMessage userMessage,
                                 java.util.List<java.lang.String> targetLanguages,
                                 BaseChannel.TranslateUserMessageHandler handler)
```
    Translates a user message.
    
    Parameters:
    
    userMessage - User message to translate.
    
    targetLanguages - Target language codes (for example "es" for spanish) the message will be translated to.
    
    handler - Callback handler.
    
    Since:
    
    3.0.99
  - copyFileMessage
```
public FileMessage copyFileMessage(BaseChannel targetChannel,
                                   FileMessage fileMessage,
                                   BaseChannel.CopyFileMessageHandler handler)
```
    Copies a file message from this channel to the target channel.
    
    Parameters:
    
    targetChannel - Target channel.
    
    fileMessage - Message to be forwarded.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary FileMessage instance with request ID.
    
    Since:
    
    3.0.31
  - copyUserMessage
```
public UserMessage copyUserMessage(BaseChannel targetChannel,
                                   UserMessage userMessage,
                                   BaseChannel.CopyUserMessageHandler handler)
```
    Copies a user message from this channel to the target channel.
    
    Parameters:
    
    targetChannel - Target channel.
    
    userMessage - Message to be forwarded.
    
    handler - Callback handler.
    
    Returns:
    
    Temporary UserMessage instance with request ID.
    
    Since:
    
    3.0.31
  - createMetaCounters
```
public void createMetaCounters(java.util.Map<java.lang.String,java.lang.Integer> metaCounterMap,
                               BaseChannel.MetaCounterHandler handler)
```
    Creates meta counters. This can be used to customize the channel.
    
    Parameters:
    
    metaCounterMap - Meta counter key-value map.
    
    handler - Callback handler.
  - updateMetaCounters
```
public void updateMetaCounters(java.util.Map<java.lang.String,java.lang.Integer> metaCounterMap,
                               BaseChannel.MetaCounterHandler handler)
```
    Updates meta counters.
    
    Parameters:
    
    metaCounterMap - Meta counter key-value map to update.
    
    handler - Callback handler.
  - increaseMetaCounters
```
public void increaseMetaCounters(java.util.Map<java.lang.String,java.lang.Integer> metaCounterMap,
                                 BaseChannel.MetaCounterHandler handler)
```
    Increases meta counters. This increases atomically the keyed meta counter by the specified value.
    
    Parameters:
    
    metaCounterMap - Meta counter key-value map to increase by the specified value.
    
    handler - Callback handler.
  - decreaseMetaCounters
```
public void decreaseMetaCounters(java.util.Map<java.lang.String,java.lang.Integer> metaCounterMap,
                                 BaseChannel.MetaCounterHandler handler)
```
    Decreases meta counters. This decreases atomically the keyed meta counter by the specified value.
    
    Parameters:
    
    metaCounterMap - Meta counter key-value map to decrease by the specified value.
    
    handler - Callback handler.
  - getMetaCounters
```
public void getMetaCounters(java.util.Collection<java.lang.String> keys,
                            BaseChannel.MetaCounterHandler handler)
```
    Gets meta counters.
    
    Parameters:
    
    keys - Meta counters to get.
    
    handler - Callback handler.
  - getAllMetaCounters
```
public void getAllMetaCounters(BaseChannel.MetaCounterHandler handler)
```
    Get all meta counters.
    
    Parameters:
    
    handler - Callback handler.
  - deleteMetaCounter
```
public void deleteMetaCounter(java.lang.String key,
                              BaseChannel.DeleteMetaCounterHandler handler)
```
    Deletes a meta counter.
    
    Parameters:
    
    key - Meta counter key to delete.
    
    handler - Callback handler.
  - deleteAllMetaCounters
```
public void deleteAllMetaCounters(BaseChannel.DeleteMetaCounterHandler handler)
```
    Deletes all meta counters.
    
    Parameters:
    
    handler - Callback handler.
  - createMetaData
```
public void createMetaData(java.util.Map<java.lang.String,java.lang.String> metaDataMap,
                           BaseChannel.MetaDataHandler handler)
```
    Creates meta data. This can be used to customize the channel.
    
    Parameters:
    
    metaDataMap - Meta data key-value map.
    
    handler - Callback handler.
  - updateMetaData
```
public void updateMetaData(java.util.Map<java.lang.String,java.lang.String> metaDataMap,
                           BaseChannel.MetaDataHandler handler)
```
    Updates meta data.
    
    Parameters:
    
    metaDataMap - Meta data key-value map to update.
    
    handler - Callback handler.
  - getMetaData
```
public void getMetaData(java.util.Collection<java.lang.String> keys,
                        BaseChannel.MetaDataHandler handler)
```
    Gets meta data.
    
    Parameters:
    
    keys - Meta data to get.
    
    handler - Callback handler.
  - getAllMetaData
```
public void getAllMetaData(BaseChannel.MetaDataHandler handler)
```
    Gets all meta data.
    
    Parameters:
    
    handler - Callback handler.
  - deleteMetaData
```
public void deleteMetaData(java.lang.String key,
                           BaseChannel.DeleteMetaDataHandler handler)
```
    Deletes a meta data.
    
    Parameters:
    
    key - Meta data key to delete.
    
    handler - Callback handler.
  - deleteAllMetaData
```
public void deleteAllMetaData(BaseChannel.DeleteMetaDataHandler handler)
```
    Deletes all meta data.
    
    Parameters:
    
    handler - Callback handler.
  - deleteMessage
```
public void deleteMessage(BaseMessage message,
                          BaseChannel.DeleteMessageHandler handler)
```
    Deletes a message.
    
    Parameters:
    
    message - Message to delete.
    
    handler - Callback handler.
  - updateUserMessage
```
public void updateUserMessage(long messageId,
                              java.lang.String body,
                              java.lang.String data,
                              java.lang.String customType,
                              BaseChannel.UpdateUserMessageHandler handler)
```
    Updates a UserMessage that was previously sent in the channel.
    
    Parameters:
    
    messageId - The ID of the message. This must be a message that exists in the channel's history, or an error will be returned.
    
    body - The new message body. This argument is optional and can be null.
    
    data - The new Data associated with the message. This argument is optional and can be null.
    
    customType - The new Custom Type associated with the message. This argument is optional and can be null.
    
    handler - An BaseChannel.UpdateUserMessageHandler to receive the callback from this method.
    
    Since:
    
    3.0.27
  - updateUserMessage
```
public void updateUserMessage(long messageId,
                              UserMessageParams params,
                              BaseChannel.UpdateUserMessageHandler handler)
```
    Updates a UserMessage that was previously sent in the channel.
    
    Parameters:
    
    messageId - The ID of the message. This must be a message that exists in the channel's history, or an error will be returned.
    
    params - UserMessageParams.
    
    handler - An BaseChannel.UpdateFileMessageHandler to receive the callback from this method.
    
    Since:
    
    3.0.71
  - updateFileMessage
```
public void updateFileMessage(long messageId,
                              java.lang.String data,
                              java.lang.String customType,
                              BaseChannel.UpdateFileMessageHandler handler)
```
    Updates a FileMessage that was previously sent in the channel. Note that the file itself cannot be changed; only the fields stored within the message can be modified.
    
    Parameters:
    
    messageId - The ID of the message. This must be a message that exists in the channel's history, or an error will be returned.
    
    data - The new Data associated with the message. This argument is optional and can be null.
    
    customType - The new Custom Type associated with the message. This argument is optional and can be null.
    
    handler - An BaseChannel.UpdateFileMessageHandler to receive the callback from this method.
    
    Since:
    
    3.0.27
  - updateFileMessage
```
public void updateFileMessage(long messageId,
                              FileMessageParams params,
                              BaseChannel.UpdateFileMessageHandler handler)
```
    Updates a FileMessage that was previously sent in the channel. Note that the file itself cannot be changed; only the fields stored within the message can be modified.
    
    Parameters:
    
    messageId - The ID of the message. This must be a message that exists in the channel's history, or an error will be returned.
    
    params - FileMessageParams.
    
    handler - An BaseChannel.UpdateFileMessageHandler to receive the callback from this method.
    
    Since:
    
    3.0.71
  - cancelFileMessageUpload
```
public boolean cancelFileMessageUpload(java.lang.String requestId)
```
    Cancels an ongoing FileMessage upload.
    
    Parameters:
    
    requestId - The requestId of the message to cancel. This can be retrieved through FileMessage.getRequestId().
    
    Returns:
    
    true if the cancel request is processed; false if it is not, due to the send already being complete or the message with the requestId not being found.
    
    Since:
    
    3.0.27
  - addReaction
```
public void addReaction(BaseMessage message,
                        java.lang.String key,
                        BaseChannel.ReactionHandler handler)
```
    Adds Reaction.
    
    Parameters:
    
    message - BaseMessage message.
    
    key - String reaction key.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - deleteReaction
```
public void deleteReaction(BaseMessage message,
                           java.lang.String key,
                           BaseChannel.ReactionHandler handler)
```
    Deletes Reaction.
    
    Parameters:
    
    message - BaseMessage message.
    
    key - String reaction key.
    
    handler - Callback handler.
    
    Since:
    
    3.0.112
  - createMessageMetaArrayKeys
```
public void createMessageMetaArrayKeys(BaseMessage message,
                                       java.util.List<java.lang.String> metaArrayKeys,
                                       BaseChannel.MessageMetaArrayHandler handler)
```
    Creates message meta array keys.
    
    Parameters:
    
    message - Message.
    
    metaArrayKeys - Meta array keys.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - deleteMessageMetaArrayKeys
```
public void deleteMessageMetaArrayKeys(BaseMessage message,
                                       java.util.List<java.lang.String> metaArrayKeys,
                                       BaseChannel.MessageMetaArrayHandler handler)
```
    Deletes message meta array keys.
    
    Parameters:
    
    message - Message.
    
    metaArrayKeys - Meta array keys.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - addMessageMetaArrayValues
```
@Deprecated
public void addMessageMetaArrayValues(BaseMessage message,
                                                  java.util.Map<java.lang.String,java.util.List<java.lang.String>> metaArrayMap,
                                                  BaseChannel.MessageMetaArrayHandler handler)
```
    Deprecated. As of 3.0.99, replaced by addMessageMetaArrayValues(BaseMessage, List, MessageMetaArrayHandler).
    
    Adds message meta array values.
    
    Parameters:
    
    message - Message.
    
    metaArrayMap - Meta array key-value map.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - addMessageMetaArrayValues
```
public void addMessageMetaArrayValues(BaseMessage message,
                                      java.util.List<MessageMetaArray> metaArrays,
                                      BaseChannel.MessageMetaArrayHandler handler)
```
    Adds message meta array values.
    
    Parameters:
    
    message - Message.
    
    metaArrays - MessageMetaArray list.
    
    handler - Callback handler.
    
    Since:
    
    3.0.99
  - removeMessageMetaArrayValues
```
@Deprecated
public void removeMessageMetaArrayValues(BaseMessage message,
                                                     java.util.Map<java.lang.String,java.util.List<java.lang.String>> metaArrayMap,
                                                     BaseChannel.MessageMetaArrayHandler handler)
```
    Deprecated. As of 3.0.99, replaced by removeMessageMetaArrayValues(BaseMessage, List, MessageMetaArrayHandler).
    
    Removes message meta array values.
    
    Parameters:
    
    message - Message.
    
    metaArrayMap - Meta array key-value map.
    
    handler - Callback handler.
    
    Since:
    
    3.0.76
  - removeMessageMetaArrayValues
```
public void removeMessageMetaArrayValues(BaseMessage message,
                                         java.util.List<MessageMetaArray> metaArrays,
                                         BaseChannel.MessageMetaArrayHandler handler)
```
    Removes message meta array values.
    
    Parameters:
    
    message - Message.
    
    metaArrays - MessageMetaArray list.
    
    handler - Callback handler.
    
    Since:
    
    3.0.99
  - getMyMutedInfo
```
public void getMyMutedInfo(BaseChannel.GetMyMutedInfoHandler handler)
```
    Gets my muted information in this channel.
    
    Parameters:
    
    handler - Callback handler.
    
    Since:
    
    3.0.79
  - report
```
public void report(BaseChannel.ReportCategory reportCategory,
                   java.lang.String reportDescription,
                   BaseChannel.ReportHandler handler)
```
    Reports this channel of inappropriate activities.
    
    Parameters:
    
    reportCategory - BaseChannel.ReportCategory.
    
    reportDescription - Report description. (optional)
    
    handler - Callback handler.
    
    Since:
    
    3.0.105
  - reportUser
```
public void reportUser(User offendingUser,
                       BaseChannel.ReportCategory reportCategory,
                       java.lang.String reportDescription,
                       BaseChannel.ReportUserHandler handler)
```
    Reports a user of suspicious activities.
    
    Parameters:
    
    offendingUser - Offending user.
    
    reportCategory - BaseChannel.ReportCategory.
    
    reportDescription - Report description. (optional)
    
    handler - Callback handler.
    
    Since:
    
    3.0.105
  - reportMessage
```
public void reportMessage(BaseMessage message,
                          BaseChannel.ReportCategory reportCategory,
                          java.lang.String reportDescription,
                          BaseChannel.ReportMessageHandler handler)
```
    Reports a malicious message.
    
    Parameters:
    
    message - UserMessage or FileMessage.
    
    reportCategory - BaseChannel.ReportCategory.
    
    reportDescription - Report description. (optional)
    
    handler - Callback handler.
    
    Since:
    
    3.0.105
  - addOperators
```
public void addOperators(java.util.Collection<java.lang.String> userIds,
                         AddOperatorsHandler handler)
```
    Add operators to the channel. See https://docs.sendbird.com/platform/user_type#3_operator for the explanations on the operators.
    
    Parameters:
    
    userIds - user ids to add as operators. If empty or null, SendBirdException with error code 800110 is passed to the handler.
    
    handler - handler to register
    
    Since:
    
    3.0.137
  - removeOperators
```
public void removeOperators(java.util.Collection<java.lang.String> userIds,
                            RemoveOperatorsHandler handler)
```
    Remove operators from the channel. See https://docs.sendbird.com/platform/user_type#3_operator for the explanations on the operators.
    
    Parameters:
    
    userIds - user ids to remove from operators list. If empty or null, SendBirdException with error code 800110 is passed to the handler.
    
    handler - handler to register
    
    Since:
    
    3.0.137
  - removeAllOperators
```
public void removeAllOperators(RemoveAllOperatorsHandler handler)
```
    Remove all operators from the channel. See https://docs.sendbird.com/platform/user_type#3_operator for the explanations on the operators.
    
    Parameters:
    
    handler - handler to register
    
    Since:
    
    3.0.137
  - getCachedMetaData
```
public final java.util.Map<java.lang.String,java.lang.String> getCachedMetaData()
```
    Returns all locally cached metadata as a map. Cached metadata is updated under following circumstances:
    1. getMetaData(Collection, MetaDataHandler) returned successfully
    2. getAllMetaData(MetaDataHandler) returned successfully
    3. deleteMetaData(String, DeleteMetaDataHandler) returned successfully
    4. deleteAllMetaData(DeleteMetaDataHandler) returned successfully
    5. updateMetaData(Map, MetaDataHandler) returned successfully
    6. SendBird.ChannelHandler.onMetaDataCreated(BaseChannel, Map) is called
    7. SendBird.ChannelHandler.onMetaDataUpdated(BaseChannel, Map) is called
    8. SendBird.ChannelHandler.onMetaDataDeleted(BaseChannel, List) is called
    Please note that this method only caches values available in above methods: if getAllMetaData(MetaDataHandler) is never called on this instance, the map returned by this method may not contain all metadata mappings.
    Returns:
    
    map of currently cached metadata.
    
    Since:
    
    3.0.157
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - equals
```
public boolean equals(java.lang.Object o)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object

Class BaseChannel

Nested Class Summary

Method Summary

Methods inherited from class java.lang.Object

Method Detail

buildFromSerializedData

serialize

getData

getUrl

getCreatedAt

getName

getCoverUrl

isOpenChannel

isGroupChannel

isFrozen

isEphemeral

createPreviousMessageListQuery

createMessageListQuery

createOperatorListQuery

getMessagesByMessageId

getMessagesByTimestamp

getNextMessagesByTimestamp

getNextMessagesByTimestamp

getNextMessagesByTimestamp

getNextMessagesByTimestamp

getPreviousMessagesByTimestamp

getPreviousMessagesByTimestamp

getPreviousMessagesByTimestamp

getPreviousMessagesByTimestamp

getPreviousAndNextMessagesByTimestamp

getPreviousAndNextMessagesByTimestamp

getPreviousAndNextMessagesByTimestamp

getPreviousAndNextMessagesByTimestamp

getNextMessagesById

getNextMessagesById

getNextMessagesById

getNextMessagesById

getPreviousMessagesById

getPreviousMessagesById

getPreviousMessagesById

getPreviousMessagesById

getPreviousAndNextMessagesById

getPreviousAndNextMessagesById

getPreviousAndNextMessagesById

getPreviousAndNextMessagesById

getMessageChangeLogsByToken

getMessageChangeLogsByToken

getMessageChangeLogsByToken

getMessageChangeLogsSinceToken

getMessageChangeLogsByTimestamp

getMessageChangeLogsByTimestamp

getMessageChangeLogsByTimestamp

getMessageChangeLogsSinceTimestamp

sendFileMessage

sendFileMessage

sendFileMessage

sendFileMessage

sendFileMessage

sendFileMessage

sendFileMessage

sendFileMessage

sendFileMessage

sendFileMessage

sendFileMessages

sendFileMessages

sendUserMessage

sendUserMessage

sendUserMessage

sendUserMessage

sendUserMessage

resendMessage

resendMessage

resendMessage

resendFileMessage

resendFileMessage

resendUserMessage

translateUserMessage

copyFileMessage

copyUserMessage

createMetaCounters