NexconnChatSDK/ai.nexconn.chat.message/CustomMediaMessageContent

CustomMediaMessageContent

public abstract class CustomMediaMessageContent extends MediaMessageContent

Base class for custom media message content.

Extend this class to define custom message types that require file uploads (e.g., custom images, custom files). The SDK handles registration, sending (including file upload), and decoding automatically — no internal SDK types are needed.

Compared to CustomMessageContent:

Inherits from MediaMessageContent, which provides localPath, remoteUrl, name, and other media properties
The SDK automatically handles file uploads when sending

Subclasses must:

Provide a no-argument constructor (the SDK creates instances via reflection)
Implement messageType, persistentFlag, encodeFields, decodeFields

Usage example:

class CustomFileMessage : CustomMediaMessageContent() {
    var fileType: String = ""
    var fileSize: Long = 0L

    override fun messageType(): String = "app:customfile"

    override fun persistentFlag(): Int = MessagePersistent.COUNT

    override fun encodeFields(): Map<String, Any?> = mapOf(
        "fileType" to fileType,
        "fileSize" to fileSize
    )

    override fun decodeFields(fields: Map<String, Any?>) {
        fileType = fields["fileType"] as? String ?: ""
        fileSize = (fields["fileSize"] as? Number)?.toLong() ?: 0L
    }
}

NCEngine.registerCustomMessages(listOf(CustomFileMessage::class.java))

Constructors

CustomMediaMessageContent

public CustomMediaMessageContent CustomMediaMessageContent()

Inherited properties

private Long destructTime

Auto-destruct duration in seconds after the message is read.

private String extra

Extra data attached to the message content (sent along with the message, synced remotely).

private Boolean isDestruct

Whether this is a burn-after-reading message.

private String localPath

Local file path of the media content.

private MentionedInfo mentionedInfo

Mention (@) info.

private String name

Media content file name.

private String remoteUrl

Remote URL of the media content after upload.

Functions

public abstract Unit decodeFields(Map<String, Object> fields)

Decodes the message content from field data.

public abstract Map<String, Object> encodeFields()

Encodes the message content into serializable key-value pairs.

public abstract String messageType()

Message type identifier.

public abstract Integer persistentFlag()

Message storage policy flag.

searchableWords

public List<String> searchableWords()

Returns a list of keywords to be indexed for message search.

Inherited functions

getDestructTime

public final Long getDestructTime()

Auto-destruct duration in seconds after the message is read.

public final String getExtra()

Extra data attached to the message content (sent along with the message, synced remotely).

public final String getLocalPath()

Local file path of the media content.

getMentionedInfo

public final MentionedInfo getMentionedInfo()

Mention (@) info.

public final String getName()

Media content file name.

public final String getRemoteUrl()

Remote URL of the media content after upload.

public final Boolean isDestruct()

Whether this is a burn-after-reading message.

public final Unit setDestruct(Boolean isDestruct)

Whether this is a burn-after-reading message.

setDestructTime

public final Unit setDestructTime(Long destructTime)

Auto-destruct duration in seconds after the message is read.

public final Unit setExtra(String extra)

Extra data attached to the message content (sent along with the message, synced remotely).

public final Unit setLocalPath(String localPath)

Local file path of the media content.

setMentionedInfo

public final Unit setMentionedInfo(MentionedInfo mentionedInfo)

Mention (@) info.

public final Unit setName(String name)

Media content file name.

public final Unit setRemoteUrl(String remoteUrl)

Remote URL of the media content after upload.

public String toString()