API: Chat Models

public class BedrockChatModel extends AbstractBedrockChatModel implements ChatModel {
    // Constructors
    public BedrockChatModel(String modelId);
    public BedrockChatModel(Builder builder);

    // Core methods
    public ChatResponse doChat(ChatRequest request);
    public BedrockChatRequestParameters defaultRequestParameters();
    public List<ChatModelListener> listeners();
    public ModelProvider provider();

    // Builder
    public static Builder builder();
}

public static class Builder extends AbstractBuilder<Builder> {
    // Bedrock-specific
    public Builder client(BedrockRuntimeClient client);
    public Builder maxRetries(Integer maxRetries);

    // Inherited from AbstractBuilder
    public Builder region(Region region);
    public Builder modelId(String modelId);
    public Builder defaultRequestParameters(ChatRequestParameters params);
    public Builder returnThinking(Boolean returnThinking);
    public Builder sendThinking(Boolean sendThinking);
    public Builder timeout(Duration timeout);
    public Builder logRequests(Boolean logRequests);
    public Builder logResponses(Boolean logResponses);
    public Builder logger(Logger logger);
    public Builder listeners(List<ChatModelListener> listeners);

    public BedrockChatModel build();
}

public class BedrockStreamingChatModel extends AbstractBedrockChatModel implements StreamingChatModel {
    // Constructors
    public BedrockStreamingChatModel(String modelId);
    public BedrockStreamingChatModel(Builder builder);

    // Core methods
    public void doChat(ChatRequest chatRequest, StreamingChatResponseHandler handler);
    public BedrockChatRequestParameters defaultRequestParameters();
    public List<ChatModelListener> listeners();
    public ModelProvider provider();

    // Builder
    public static Builder builder();
}

public static class Builder extends AbstractBuilder<Builder> {
    // Streaming-specific
    public Builder client(BedrockRuntimeAsyncClient client);

    // Inherited from AbstractBuilder (same as BedrockChatModel.Builder)
    public Builder region(Region region);
    public Builder modelId(String modelId);
    public Builder defaultRequestParameters(ChatRequestParameters params);
    public Builder returnThinking(Boolean returnThinking);
    public Builder sendThinking(Boolean sendThinking);
    public Builder timeout(Duration timeout);
    public Builder logRequests(Boolean logRequests);
    public Builder logResponses(Boolean logResponses);
    public Builder logger(Logger logger);
    public Builder listeners(List<ChatModelListener> listeners);

    public BedrockStreamingChatModel build();
}