org.logicalcobwebs.proxool.proxy
Class MethodMapper

java.lang.Object
  org.logicalcobwebs.proxool.proxy.MethodMapper

public class MethodMapper
extends java.lang.Object

Handles the mapping between methods with identical signatures but that are not related by inheritance. This allows you to invoke a method on a class using an interface that it doesn't actually implement. It caches the result of its reflective lookup to save time. If the concreteClass does in fact implement the injectable interface then it quickly returns the method without the penalty of mapping using reflection.

Since:

Proxool 0.9

Version:

$Revision: 1.2 $, $Date: 2004/07/13 21:06:18 $

Author:

Bill Horsman, $Author: billhorsman $ (current maintainer)

Field Summary

private java.util.Map	cachedConcreteMethods
private java.lang.Class	concreteClass

Constructor Summary

MethodMapper(java.lang.Class concreteClass)

Method Summary

protected java.lang.reflect.Method	getConcreteMethod(java.lang.reflect.Method injectableMethod) Returns the method in the concrete class with an indentical signature to that passed as a parameter
void	overrideConcreteMethod(java.lang.reflect.Method injectableMethod, java.lang.reflect.Method overridenMethod) Don't use the one we calculate using getConcreteMethod(java.lang.reflect.Method), use this one instead.

Methods inherited from class java.lang.Object

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

Field Detail

concreteClass

private java.lang.Class concreteClass

cachedConcreteMethods

private java.util.Map cachedConcreteMethods

Constructor Detail

MethodMapper

public MethodMapper(java.lang.Class concreteClass)

Parameters:

concreteClass - the class that we want to invoke methods on. It should either implement all methods on the injectable interface, or provide methods with an identical signature.

Method Detail

getConcreteMethod

protected java.lang.reflect.Method getConcreteMethod(java.lang.reflect.Method injectableMethod)
                                              throws ProxoolException

Returns the method in the concrete class with an indentical signature to that passed as a parameter

Parameters:

injectableMethod - provides signature that we are trying to match

Returns:

the method in the concrete class that we can invoke as if it were in the interface

Throws:

ProxoolException - if the method is not found.

overrideConcreteMethod

public void overrideConcreteMethod(java.lang.reflect.Method injectableMethod,
                                   java.lang.reflect.Method overridenMethod)

Don't use the one we calculate using getConcreteMethod(java.lang.reflect.Method), use this one instead.

Parameters:

injectableMethod - the method supplied by the proxy

overridenMethod - the one we are going to use (probably the same as injectrableMethod actually)