Package org.axonframework.messaging.core.annotation

Class AbstractAnnotatedParameterResolverFactory<A extends Annotation,P>

java.lang.Object

org.axonframework.messaging.core.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:

AggregateTypeParameterResolverFactory, MessageIdentifierParameterResolverFactory, SequenceNumberParameterResolverFactory, SourceIdParameterResolverFactory, TimestampParameterResolverFactory

public abstract class AbstractAnnotatedParameterResolverFactory<A extends Annotation,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:

2.1.0

Author:

Mark Ingram

Constructor Summary

Constructors

Modifier	Constructor	Description
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

Modifier and Type	Method	Description
ParameterResolver<P>	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.
protected abstract ParameterResolver<P>	getResolver()

Methods inherited from class java.lang.Object

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

Constructor Details

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 Details

getResolver

protected abstract ParameterResolver<P> getResolver()

Returns:

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

createInstance

@Nullable
public ParameterResolver<P> 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.