org.logicalcobwebs.proxool.proxy

Class 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.
Version:
$Revision: 1.2 $, $Date: 2004/07/13 21:06:18 $
Authors:
Bill Horsman
$Author: billhorsman $ (current maintainer)
Since:
Proxool 0.9

Constructor Summary

MethodMapper(Class concreteClass)

Method Summary

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

Constructor Details

MethodMapper

public MethodMapper(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 Details

getConcreteMethod

protected Method getConcreteMethod(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(Method injectableMethod,
                                   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)