DataSource & ChatConfigurator

The DataSource framework is the most powerful customization mechanism in the UI Kit. It lets you globally modify how messages are rendered, what options appear on message bubbles, what attachment actions are available in the composer, and how text is formatted — all without touching individual components.

DataSource Interface

The DataSource interface defines how the UI Kit provides:

Message templates (how each message type is rendered)
Bubble content views (the actual views inside message bubbles)
Message options (actions on message bubbles like reply, copy, delete)
Attachment options (composer actions like camera, gallery, file)
AI options (AI-powered composer actions)
Text formatters (text processing for mentions, links, etc.)

DataSourceDecorator Pattern

DataSourceDecorator is an abstract class that wraps a DataSource and delegates all method calls to it. You extend it and override only the methods you want to customize. This is the decorator pattern — you layer behavior on top of the existing implementation.

ChatConfigurator

ChatConfigurator manages the active DataSource instance:

Method	Description
`ChatConfigurator.enable(Function1<DataSource, DataSource>)`	Register a decorator that wraps the current active DataSource
`ChatConfigurator.init()`	Reset to the default `MessagesDataSource`

You can chain multiple decorators by calling enable multiple times. Each call wraps the previous DataSource.

Example: Adding a Custom Message Option

Create a DataSourceDecorator that adds a “Translate” option to all text messages:

Kotlin
Java

class TranslateDataSource(dataSource: DataSource) : DataSourceDecorator(dataSource) {

    override fun getTextMessageOptions(
        context: Context,
        baseMessage: BaseMessage,
        group: Group?,
        additionParameter: AdditionParameter
    ): List<CometChatMessageOption> {
        val options = super.getTextMessageOptions(context, baseMessage, group, additionParameter).toMutableList()
        options.add(CometChatMessageOption(
            id = "translate",
            title = "Translate",
            icon = R.drawable.ic_translate,
            onClick = { translateMessage(baseMessage) }
        ))
        return options
    }
}

// Register the decorator
ChatConfigurator.enable { dataSource -> TranslateDataSource(dataSource) }

// Reset to defaults when needed
ChatConfigurator.init()

public class TranslateDataSource extends DataSourceDecorator {
    public TranslateDataSource(DataSource dataSource) {
        super(dataSource);
    }

    @Override
    public List<CometChatMessageOption> getTextMessageOptions(
            Context context, BaseMessage baseMessage, Group group, @NonNull AdditionParameter additionParameter) {
        List<CometChatMessageOption> options =
            new ArrayList<>(super.getTextMessageOptions(context, baseMessage, group, additionParameter));
        options.add(new CometChatMessageOption(
            "translate", "Translate", R.drawable.ic_translate,
            () -> translateMessage(baseMessage)
        ));
        return options;
    }
}

// Register the decorator
ChatConfigurator.enable(dataSource -> new TranslateDataSource(dataSource));

// Reset to defaults when needed
ChatConfigurator.init();

Message Template Methods

Message templates define how each message type is rendered. Override these to add custom message types or modify existing ones:

Method	Description
`getTextTemplate(AdditionParameter)`	Template for text messages
`getImageTemplate(AdditionParameter)`	Template for image messages
`getVideoTemplate(AdditionParameter)`	Template for video messages
`getAudioTemplate(AdditionParameter)`	Template for audio messages
`getFileTemplate(AdditionParameter)`	Template for file messages
`getFormTemplate(AdditionParameter)`	Template for form messages
`getSchedulerTemplate(AdditionParameter)`	Template for scheduler messages
`getCardTemplate(AdditionParameter)`	Template for card messages
`getAIAssistantTemplate(AdditionParameter)`	Template for AI assistant messages
`getMessageTemplates(AdditionParameter)`	All message templates combined
`getMessageTemplate(String category, String type, AdditionParameter)`	Template for a specific category/type

Bubble Content View Methods

Each message type has a pair of methods following the createView / bindView pattern:

Create Method	Bind Method	Message Type
`getTextBubbleContentView(...)`	`bindTextBubbleContentView(...)`	Text
`getImageBubbleContentView(...)`	`bindImageBubbleContentView(...)`	Image
`getVideoBubbleContentView(...)`	`bindVideoBubbleContentView(...)`	Video
`getAudioBubbleContentView(...)`	`bindAudioBubbleContentView(...)`	Audio
`getFileBubbleContentView(...)`	`bindFileBubbleContentView(...)`	File
`getFormBubbleContentView(...)`	`bindFormBubbleContentView(...)`	Form
`getSchedulerBubbleContentView(...)`	`bindSchedulerBubbleContentView(...)`	Scheduler
`getCardBubbleContentView(...)`	`bindCardBubbleContentView(...)`	Card
`getAIAssistantBubbleContentView(...)`	`bindAIAssistantBubbleContentView(...)`	AI Assistant

The get* method creates the View (called once per ViewHolder), and the bind* method populates it with data (called on each bind). Override these to completely replace how a message type is rendered inside its bubble.

Other DataSource Methods

Method	Description
`getAttachmentOptions(Context, User, Group, HashMap, AdditionParameter)`	Composer attachment actions
`getAIOptions(Context, User, Group, HashMap, AIOptionsStyle, AdditionParameter)`	Composer AI actions
`getCommonOptions(Context, BaseMessage, Group, AdditionParameter)`	Options common to all message types
`getMessageOptions(Context, BaseMessage, Group, AdditionParameter)`	All options for a message
`getTextFormatters(Context, AdditionParameter)`	Text formatters for message processing
`getLastConversationMessage(Context, Conversation, AdditionParameter)`	Last message preview in conversations list
`getAuxiliaryHeaderMenu(Context, User, Group, AdditionParameter)`	Auxiliary header menu view

Menu & Options — Component-level option customization.
Text Formatters — Custom text processing via DataSource.
Customization Overview — See all customization categories.

Documentation Index

​DataSource Interface

​DataSourceDecorator Pattern

​ChatConfigurator

​Example: Adding a Custom Message Option

​Message Template Methods

​Bubble Content View Methods

​Other DataSource Methods

​Related