Package org.axonframework.messaging.core.annotation

Class HierarchicalParameterResolverFactory

java.lang.Object

org.axonframework.messaging.core.annotation.HierarchicalParameterResolverFactory

All Implemented Interfaces:

ParameterResolverFactory

public class HierarchicalParameterResolverFactory
extends Object
implements ParameterResolverFactory

ParameterResolverFactory that first tries to resolve a parameter using the child factory. If that fails, it tries the parent factory. This is useful to encapsulate a set of parameter resolvers that are only relevant in a specific context, such as a specific Module.

Since:

5.0.0

Author:

Mitchell Herrijgers

Method Summary

Modifier and Type	Method	Description
static HierarchicalParameterResolverFactory	create(ParameterResolverFactory parent, ParameterResolverFactory child)	Creates a new hierarchicalParameterResolverFactory that delegates to the given parent and child factories.
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

Method Details

create

public static HierarchicalParameterResolverFactory create(@Nonnull
 ParameterResolverFactory parent,
 @Nonnull
 ParameterResolverFactory child)

Creates a new hierarchicalParameterResolverFactory that delegates to the given parent and child factories. The child factory is tried first, and if it cannot resolve the parameter, the parent factory is tried.

Parameters:

parent - The parent ParameterResolverFactory to delegate to if the child cannot resolve the parameter.

child - The child ParameterResolverFactory to try first.

Returns:

A new hierarchical ParameterResolverFactory that delegates to the given factories.

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.