Package org.axonframework.modelling.entity.child

Class SingleEntityChildMetamodel<C,P>

java.lang.Object

org.axonframework.modelling.entity.child.AbstractEntityChildMetamodel<C,P>

org.axonframework.modelling.entity.child.SingleEntityChildMetamodel<C,P>

Type Parameters:

C - The type of the child entity.

P - The type of the parent entity.

All Implemented Interfaces:

EntityChildMetamodel<C,P>, EntityEvolver<P>

public class SingleEntityChildMetamodel<C,P>
extends AbstractEntityChildMetamodel<C,P>

An EntityChildMetamodel that handles commands and events for a single child entity. It will use the provided ChildEntityFieldDefinition to resolve the child entity from the parent entity. Once the entity is resolved, it will delegate the command- and event-handling to the child entity metamodel.

The commands and events will, by default, be forwarded unconditionally to the child entity. If you have multiple member fields, and want to match commands and events to a specific child entity, you can configure the CommandTargetResolver and EventTargetMatcher to match the child entity based on the command or event.

Since:

5.0.0

Author:

Mitchell Herrijgers

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SingleEntityChildMetamodel.Builder<C,P>	Builder for creating a SingleEntityChildMetamodel for the given parent class and child entity metamodel.

Field Summary

Fields inherited from class org.axonframework.modelling.entity.child.AbstractEntityChildMetamodel

commandTargetResolver, eventTargetMatcher, metamodel

Method Summary

Modifier and Type	Method	Description
protected P	applyEvolvedChildEntities(P entity, List<C> evolvedChildEntities)
EntityMetamodel<C>	entityMetamodel()	Returns the EntityMetamodel of the child entity this metamodel describes.
static <C, P> SingleEntityChildMetamodel.Builder<C,P>	forEntityModel(Class<P> parentClass, EntityMetamodel<C> metamodel)	Creates a new SingleEntityChildMetamodel.Builder for the given parent class and child entity metamodel.
protected List<C>	getChildEntities(P entity)
String	toString()

Methods inherited from class org.axonframework.modelling.entity.child.AbstractEntityChildMetamodel

canHandle, entityType, evolve, handle, supportedCommands

Methods inherited from class java.lang.Object

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

Method Details

getChildEntities

protected List<C> getChildEntities(P entity)

Specified by:

getChildEntities in class AbstractEntityChildMetamodel<C,P>

applyEvolvedChildEntities

protected P applyEvolvedChildEntities(P entity,
 List<C> evolvedChildEntities)

Specified by:

applyEvolvedChildEntities in class AbstractEntityChildMetamodel<C,P>

entityMetamodel

@Nonnull
public EntityMetamodel<C> entityMetamodel()

Description copied from interface: EntityChildMetamodel

Returns the EntityMetamodel of the child entity this metamodel describes.

Returns:

The EntityMetamodel of the child entity this metamodel describes.

toString

public String toString()

Overrides:

toString in class Object

forEntityModel

public static <C,
P>
SingleEntityChildMetamodel.Builder<C,P> forEntityModel(@Nonnull
 Class<P> parentClass,
 @Nonnull
 EntityMetamodel<C> metamodel)

Creates a new SingleEntityChildMetamodel.Builder for the given parent class and child entity metamodel. The ChildEntityFieldDefinition is required to resolve the child entity from the parent entity and evolve the parent entity based on the child entities.

Type Parameters:

C - The type of the child entity.

P - The type of the parent entity.

Parameters:

parentClass - The class of the parent entity.

metamodel - The EntityMetamodel of the child entity.

Returns:

A new SingleEntityChildMetamodel.Builder for the given parent class and child entity metamodel.