org.springframework.expression.spel.support
Class ReflectiveMethodResolver

java.lang.Object
  org.springframework.expression.spel.support.ReflectiveMethodResolver

All Implemented Interfaces:

MethodResolver

public class ReflectiveMethodResolver
extends java.lang.Object
implements MethodResolver

A method resolver that uses reflection to locate the method that should be invoked.

Since:

3.0

Author:

Andy Clement, Juergen Hoeller

Field Summary

private java.util.Map<java.lang.Class<?>,MethodFilter>	filters
private static java.lang.reflect.Method[]	NO_METHODS

Constructor Summary

ReflectiveMethodResolver()

Method Summary

void	registerMethodFilter(java.lang.Class<?> type, MethodFilter filter)
MethodExecutor	resolve(EvaluationContext context, java.lang.Object targetObject, java.lang.String name, java.util.List<TypeDescriptor> argumentTypes) Locate a method on a type.

Methods inherited from class java.lang.Object

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

Field Detail

NO_METHODS

private static java.lang.reflect.Method[] NO_METHODS

filters

private java.util.Map<java.lang.Class<?>,MethodFilter> filters

Constructor Detail

ReflectiveMethodResolver

public ReflectiveMethodResolver()

Method Detail

resolve

public MethodExecutor resolve(EvaluationContext context,
                              java.lang.Object targetObject,
                              java.lang.String name,
                              java.util.List<TypeDescriptor> argumentTypes)
                       throws AccessException

Locate a method on a type. There are three kinds of match that might occur:

1. An exact match where the types of the arguments match the types of the constructor
2. An in-exact match where the types we are looking for are subtypes of those defined on the constructor
3. A match where we are able to convert the arguments into those expected by the constructor, according to the registered type converter.

Specified by:

resolve in interface MethodResolver

Parameters:

context - the current evaluation context

targetObject - the object upon which the method is being called

argumentTypes - the arguments that the constructor must be able to handle

Returns:

a MethodExecutor that can invoke the method, or null if the method cannot be found

Throws:

AccessException

registerMethodFilter

public void registerMethodFilter(java.lang.Class<?> type,
                                 MethodFilter filter)