Package org.axonframework.modelling.annotation

Class InjectEntityParameterResolverFactory

java.lang.Object

org.axonframework.modelling.annotation.InjectEntityParameterResolverFactory

All Implemented Interfaces:

ParameterResolverFactory

public class InjectEntityParameterResolverFactory
extends Object
implements ParameterResolverFactory

ParameterResolverFactory implementation that provides ParameterResolvers for parameters annotated with InjectEntity.

The parameter can either be a ManagedEntity or the entity itself. The order of resolving the identity id is as specified on the InjectEntity annotation.

Since:

5.0.0

Author:

Mitchell Herrijgers

See Also:

• InjectEntity

Constructor Summary

Constructors

Constructor	Description
InjectEntityParameterResolverFactory(Configuration configuration)	Initialize the factory with the given configuration.

Method Summary

Modifier and Type	Method	Description
ParameterResolver<?>	createInstance(Executable executable, Parameter[] parameters, int parameterIndex)	If available, creates a ParameterResolver instance that can provide a parameter of type parameterType for a given message.

Methods inherited from class java.lang.Object

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

Constructor Details

InjectEntityParameterResolverFactory

public InjectEntityParameterResolverFactory(@Nonnull
 Configuration configuration)

Initialize the factory with the given configuration. The configuration should contain a StateManager to load entities from.

This constructor depends on the Configuration instead of the StateManager to prevent circular dependencies during creation of message handlers. For example, if the repository uses an annotation-based event state applier, it would construct methods, which would then require the StateManager to be created during the construction of the parameter resolvers. This would lead to a circular dependency.

Parameters:

configuration - The Configuration to use for loading entities.

Method Details

createInstance

@Nullable
public ParameterResolver<?> createInstance(@Nonnull
 Executable executable,
 @Nonnull
 Parameter[] parameters,
 int parameterIndex)

Description copied from interface: ParameterResolverFactory

If available, creates a ParameterResolver instance that can provide a parameter of type parameterType for a given message.

If the ParameterResolverFactory cannot provide a suitable ParameterResolver, returns null.

Specified by:

createInstance in interface ParameterResolverFactory

Parameters:

executable - The executable (constructor or method) to inspect.

parameters - The parameters on the executable to inspect.

parameterIndex - The index of the parameter to return a ParameterResolver for.

Returns:

A suitable ParameterResolver, or null if none is found.