org.zkoss.lang.reflect
Class FacadeInvoker

java.lang.Object
  org.zkoss.lang.reflect.FacadeInvoker

All Implemented Interfaces:

java.lang.reflect.InvocationHandler

public class FacadeInvoker
extends java.lang.Object
implements java.lang.reflect.InvocationHandler

The facade invocation handler. Like the facade pattern, this invocation handler is used to facade an object with a set of interfaces.

This Invocation handler assumes the object being facaded (a.k.a, the target) has all methods of these interfaces, but it might not implement all of these interfaces directly.

It happens when you need to provide interfaces to classes that come from third parties.

Example:

class A {
  public void f() {...}
}
interface I {
  public void f();
}
Then, you could do:
I i = (I)FacadeInvoker.newInstance(new A(), new Class[] {I});

Author:

tomyeh

Constructor Summary

protected

FacadeInvoker(java.lang.Object target)

Method Summary

java.lang.Object	invoke(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[] args)
static java.lang.Object	newInstance(java.lang.Object target, java.lang.Class[] interfaces) Creates an object that implements the giving interfaces by wrapping a giving object, target.
static java.lang.Object	newInstance(java.lang.Object target, java.lang.Class[] interfaces, java.lang.ClassLoader clsLoader) Creates an object that implements the giving interfaces by wrapping a giving object, target.

Methods inherited from class java.lang.Object

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

Constructor Detail

FacadeInvoker

protected FacadeInvoker(java.lang.Object target)

Method Detail

newInstance

public static final java.lang.Object newInstance(java.lang.Object target,
                                                 java.lang.Class[] interfaces,
                                                 java.lang.ClassLoader clsLoader)

Creates an object that implements the giving interfaces by wrapping a giving object, target.

The target must have all methods in all given interfaces, but might not implement all these interfaces.

newInstance

public static final java.lang.Object newInstance(java.lang.Object target,
                                                 java.lang.Class[] interfaces)

Creates an object that implements the giving interfaces by wrapping a giving object, target.

A shortcut: newInstance( target, interfaces, Thread.currentThread().getContextClassLoader()).

invoke

public java.lang.Object invoke(java.lang.Object proxy,
                               java.lang.reflect.Method method,
                               java.lang.Object[] args)
                        throws java.lang.Throwable

Specified by:

invoke in interface java.lang.reflect.InvocationHandler

Throws:

java.lang.Throwable