Package org.a2aproject.sdk.grpc.mapper

Interface StreamResponseMapper

All Known Implementing Classes:

StreamResponseMapperImpl

public interface StreamResponseMapper

Mapper between StreamingEventKind and StreamResponse.

StreamResponse uses a protobuf oneof field to represent polymorphic streaming events. StreamingEventKind is a sealed interface with four permitted implementations:

• Task - Complete task state
• Message - Full message
• TaskStatusUpdateEvent - Status update event
• TaskArtifactUpdateEvent - Artifact update event

This mapper provides bidirectional conversion using instanceof checks (toProto) and switch expressions on the oneof case (fromProto).

Field Summary

Fields

Modifier and Type	Field	Description
static final StreamResponseMapper	INSTANCE

Method Summary

Modifier and Type	Method	Description
default StreamingEventKind	fromProto(StreamResponse proto)	Converts proto StreamResponse to domain StreamingEventKind.
default StreamResponse	toProto(StreamingEventKind domain)	Converts domain StreamingEventKind to proto StreamResponse.

Field Details

INSTANCE

static final StreamResponseMapper INSTANCE

Method Details

toProto

default StreamResponse toProto(StreamingEventKind domain)

Converts domain StreamingEventKind to proto StreamResponse. Uses instanceof checks to determine which oneof field to set.

Parameters:

domain - the streaming event kind (Task, Message, TaskStatusUpdateEvent, or TaskArtifactUpdateEvent)

Returns:

the proto StreamResponse with the appropriate oneof field set

fromProto

default StreamingEventKind fromProto(StreamResponse proto)

Converts proto StreamResponse to domain StreamingEventKind. Uses switch expression on the oneof case to determine which type to return.

Parameters:

proto - the proto StreamResponse

Returns:

the corresponding domain streaming event kind

Throws:

IllegalArgumentException - if the oneof field is not set