Class ResponseConverter

java.lang.Object

com.google.adk.a2a.converters.ResponseConverter

public final class ResponseConverter
extends Object

Utility for converting ADK events to A2A spec messages (and back).

Unparseable ADK metadata and unconvertible parts from a remote agent are logged and dropped; the rest of the event is still converted.

Method Summary

Modifier and Type	Method	Description
static Event	artifactToEvent(io.a2a.spec.Artifact artifact, InvocationContext invocationContext)	Converts an artifact to an ADK event.
static Optional<Event>	clientEventToEvent(io.a2a.client.ClientEvent event, InvocationContext invocationContext)	Converts a A2A ClientEvent to an ADK Event, based on the event type.
static Event	messageToEvent(io.a2a.spec.Message message, InvocationContext invocationContext)	Converts an A2A message back to ADK events.
static Event	messageToEvent(io.a2a.spec.Message message, InvocationContext invocationContext, boolean isPending)	Converts an A2A message back to ADK events.
static Event	messageToFailedEvent(io.a2a.spec.Message message, InvocationContext invocationContext)	Converts an A2A message for a failed task to ADK event filling in the error message.
static Event	taskToEvent(io.a2a.spec.Task task, InvocationContext invocationContext)	Converts an A2A Task to an ADK Event.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

clientEventToEvent

public static Optional<Event> clientEventToEvent(io.a2a.client.ClientEvent event,
 InvocationContext invocationContext)

Converts a A2A ClientEvent to an ADK Event, based on the event type. Returns an empty optional if the event should be ignored (e.g. if the event is not a final update for TaskArtifactUpdateEvent, if the message is empty for TaskStatusUpdateEvent, or if no part could be converted from a message or from the message of a status update that does not end the turn).

Throws:

IllegalArgumentException - if the event type is not supported.

artifactToEvent

public static Event artifactToEvent(io.a2a.spec.Artifact artifact,
 InvocationContext invocationContext)

Converts an artifact to an ADK event.

messageToFailedEvent

public static Event messageToFailedEvent(io.a2a.spec.Message message,
 InvocationContext invocationContext)

Converts an A2A message for a failed task to ADK event filling in the error message.

messageToEvent

public static Event messageToEvent(io.a2a.spec.Message message,
 InvocationContext invocationContext)

Converts an A2A message back to ADK events.

messageToEvent

public static Event messageToEvent(io.a2a.spec.Message message,
 InvocationContext invocationContext,
 boolean isPending)

Converts an A2A message back to ADK events. For streaming task in pending state it sets the thought field to true, to mark them as thought updates.

taskToEvent

public static Event taskToEvent(io.a2a.spec.Task task,
 InvocationContext invocationContext)

Converts an A2A Task to an ADK Event. If the artifacts are present, the last artifact is used. If not, the status message is used. If not, the last history message is used. If none of these are present, an empty event is returned.