de.tsl2.nano.util

Class MultipleInheritanceProxy

java.lang.Object

de.tsl2.nano.util.MultipleInheritanceProxy

All Implemented Interfaces:

InvocationHandler

public class MultipleInheritanceProxy
extends Object
implements InvocationHandler

simple proxy mechanism to enhance implemenations through additional interfaces and their delegates. the order of the delegates will define the priority of the delegates. each delegate will be asked, if it implement the interface-method.

To work on delegator not directly implementing this interfaces, use DelegatorProxy.

Version:

$Revision: 1.0 $

Author:

ts 26.02.2010

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MultipleInheritanceProxy() Constructor
protected	MultipleInheritanceProxy(Collection<Object> delegates) Constructor

Method Summary

Modifier and Type	Method and Description
static <T> T	createEnhancedPresenter(Object instanceToEnhance, Object extendedImplementation, Class<T> cast, ClassLoader classLoader) combines two instances into one.
static Object	createMultipleInheritance(Class[] interfazes, Collection delegates, ClassLoader classLoader) creates a new proxy instance with BeanProxy as invocationhandler.
protected static Collection<Class>	getAllInterfaces(Class<?> cls) getAllInterfaces
Object	invoke(Object proxy, Method method, Object[] args) the first implementing delegate collection member will be used to invoke the given method.
String	toString() toString

Methods inherited from class java.lang.Object

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

Constructor Detail

MultipleInheritanceProxy

protected MultipleInheritanceProxy()

Constructor

MultipleInheritanceProxy

protected MultipleInheritanceProxy(Collection<Object> delegates)

Constructor

Parameters:

delegates - see delegates

Method Detail

createMultipleInheritance

public static Object createMultipleInheritance(Class[] interfazes,
                                               Collection delegates,
                                               ClassLoader classLoader)

creates a new proxy instance with BeanProxy as invocationhandler.

Parameters:

interfazes - interfaces to implement

delegates - implementation instances. the order is important!

classloader - classloader to use the interfaces and instances

Returns:

implementation of the given interfaces.

createEnhancedPresenter

public static final <T> T createEnhancedPresenter(Object instanceToEnhance,
                                                  Object extendedImplementation,
                                                  Class<T> cast,
                                                  ClassLoader classLoader)

combines two instances into one.

Parameters:

instanceToEnhance - object to enhance with functionality of extendedImplementation

extendedImplementation - object to be used as enhancer.

cast - interface to be returned

Returns:

combination of both implementations.

getAllInterfaces

protected static Collection<Class> getAllInterfaces(Class<?> cls)

getAllInterfaces

Parameters:

cls - clazz to evaluate

Returns:

all implementing interfaces (of all subclasses)

invoke

public Object invoke(Object proxy,
                     Method method,
                     Object[] args)
              throws Throwable

the first implementing delegate collection member will be used to invoke the given method.

Specified by:

invoke in interface InvocationHandler

Throws:

Throwable

See Also:

InvocationHandler.invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[])

toString

public String toString()

toString

Overrides:

toString in class Object

See Also:

Object.toString()