org.axonframework.eventhandling.annotation
Class AbstractAnnotatedParameterResolverFactory<A,P>

java.lang.Object
  org.axonframework.eventhandling.annotation.AbstractAnnotatedParameterResolverFactory<A,P>

Type Parameters:

A - The type of annotation to check for

P - The type the parameter needs to be assignable from.

All Implemented Interfaces:

ParameterResolverFactory

Direct Known Subclasses:

SequenceNumberParameterResolverFactory, TimestampParameterResolverFactory

public abstract class AbstractAnnotatedParameterResolverFactory<A,P>
extends Object
implements ParameterResolverFactory

ParameterResolverFactory that will supply a parameter resolver when a matching parameter annotation is paired with a suitable type of parameter.

Handling is in place to ensure that primitive parameter types will be resolved correctly from their respective wrapper types.

Since:

2.1

Author:

Mark Ingram

Constructor Summary

protected

AbstractAnnotatedParameterResolverFactory(Class<A> annotationType, Class<P> declaredParameterType) Initialize a ParameterResolverFactory instance that resolves parameters of type declaredParameterType annotated with the given annotationType.

Method Summary

ParameterResolver	createInstance(Annotation[] memberAnnotations, Class<?> parameterType, Annotation[] parameterAnnotations) If available, creates a ParameterResolver instance that can provide a parameter of type parameterType for a given message.
protected abstract ParameterResolver<P>	getResolver()

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractAnnotatedParameterResolverFactory

protected AbstractAnnotatedParameterResolverFactory(Class<A> annotationType,
                                                    Class<P> declaredParameterType)

Initialize a ParameterResolverFactory instance that resolves parameters of type declaredParameterType annotated with the given annotationType.

Parameters:

annotationType - the type of annotation that a prospective parameter should declare

declaredParameterType - the type that the parameter value should be assignable to

Method Detail

getResolver

protected abstract ParameterResolver<P> getResolver()

Returns:

the parameter resolver that is supplied when a matching parameter is located

createInstance

public ParameterResolver createInstance(Annotation[] memberAnnotations,
                                        Class<?> parameterType,
                                        Annotation[] parameterAnnotations)

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:

memberAnnotations - annotations placed on the member (e.g. method)

parameterType - the parameter type to find a resolver for

parameterAnnotations - annotations placed on the parameter

Returns:

a suitable ParameterResolver, or null if none is found