Package org.zkoss.lang.reflect

Class 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

      Constructors 
      Modifier Constructor Description
      protected FacadeInvoker​(java.lang.Object target)  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      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