Class CallbackContext

java.lang.Object

com.google.adk.agents.ReadonlyContext

com.google.adk.agents.CallbackContext

Direct Known Subclasses:

ToolContext

public class CallbackContext
extends ReadonlyContext

The context of various callbacks for an agent invocation.

Field Summary

Fields

Modifier and Type	Field	Description
protected EventActions	eventActions

Fields inherited from class com.google.adk.agents.ReadonlyContext

invocationContext

Constructor Summary

Constructors

Constructor	Description
CallbackContext(InvocationContext invocationContext, EventActions eventActions)	Initializes callback context.

Method Summary

Modifier and Type	Method	Description
EventActions	eventActions()	Returns the EventActions associated with this context.
io.reactivex.rxjava3.core.Maybe<com.google.genai.types.Part>	loadArtifact(String filename, Optional<Integer> version)	Loads an artifact from the artifact service associated with the current session.
void	saveArtifact(String filename, com.google.genai.types.Part artifact)	Saves an artifact and records it as a delta for the current session.
State	state()	Returns the delta-aware state of the current callback.

Methods inherited from class com.google.adk.agents.ReadonlyContext

agentName, branch, events, invocationId, sessionId, userContent

Methods inherited from class java.lang.Object

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

Field Details

eventActions

protected EventActions eventActions

Constructor Details

CallbackContext

public CallbackContext(InvocationContext invocationContext,
 EventActions eventActions)

Initializes callback context.

Parameters:

invocationContext - Current invocation context.

eventActions - Callback event actions.

Method Details

state

public State state()

Returns the delta-aware state of the current callback.

Overrides:

state in class ReadonlyContext

eventActions

public EventActions eventActions()

Returns the EventActions associated with this context.

loadArtifact

public io.reactivex.rxjava3.core.Maybe<com.google.genai.types.Part> loadArtifact(String filename,
 Optional<Integer> version)

Loads an artifact from the artifact service associated with the current session.

Parameters:

filename - Artifact file name.

version - Artifact version (optional).

Returns:

loaded part, or empty if not found.

Throws:

IllegalStateException - if the artifact service is not initialized.

saveArtifact

public void saveArtifact(String filename,
 com.google.genai.types.Part artifact)

Saves an artifact and records it as a delta for the current session.

Parameters:

filename - Artifact file name.

artifact - Artifact content to save.

Throws:

IllegalStateException - if the artifact service is not initialized.