Interface MessageMapper_v0_3

All Known Implementing Classes:

MessageMapper_v0_3Impl

public interface MessageMapper_v0_3

Bidirectional mapper for converting Message between A2A Protocol v0.3 and v1.0.

Key differences:

• v0.3: Message is a record with accessor methods (e.g., role(), parts())
• v1.0: Message is a record with accessor methods (e.g., role(), parts())
• Role enum values have "ROLE_" prefix in v1.0
• Part types (TextPart, FilePart, DataPart) changed from classes to records in v1.0

Uses RoleMapper_v0_3 and PartMapper_v0_3 for nested conversions.

Field Summary

Fields

Modifier and Type	Field	Description
static final MessageMapper_v0_3	INSTANCE	Singleton instance accessed via A2AMappers_v0_3 factory.

Method Summary

Modifier and Type	Method	Description
default Message_v0_3	fromV10(Message v10)	Converts v1.0 Message to v0.3 Message.
default Message	toV10(Message_v0_3 v03)	Converts v0.3 Message to v1.0 Message.

Field Details

INSTANCE

static final MessageMapper_v0_3 INSTANCE

Singleton instance accessed via A2AMappers_v0_3 factory.

Method Details

toV10

default Message toV10(Message_v0_3 v03)

Converts v0.3 Message to v1.0 Message.

Converts all fields including role, parts, messageId, contextId, taskId, referenceTaskIds, metadata, and extensions.

Parameters:

v03 - the v0.3 message

Returns:

the equivalent v1.0 message

fromV10

default Message_v0_3 fromV10(Message v10)

Converts v1.0 Message to v0.3 Message.

Converts all fields including role, parts, messageId, contextId, taskId, referenceTaskIds, metadata, and extensions.

Parameters:

v10 - the v1.0 message

Returns:

the equivalent v0.3 message