A library that enables quick and easy creation of dynamically generated proxy wrappers around Java bean objects which fire an event whenever a setter method has been invoked.

Here we have a class PersonImpl which implements interface Person. The class has two properties: firstName and lastName. What we want to achieve is to have an event fire whenever one of the properties has been changed, but without changing the existing PersonImpl class and without explicitly creating another class. We could have a really large number of such classes or the classes may not even be known at the time.

So, what this library does is to generate a wrapper class implementing the same interface on the fly and redirect all method calls to the original object, except the setter methods which also have to fire the event.

    //create the original bean
    Person real = new PersonImpl();
	real.setFirstName("Chuck");
	real.setLastName("Norris");
		
	BoundBeanFactory factory = new BoundBeanFactory();
	//state which properties we want to track
	factory.setBoundProperties(new String[]{"firstName", "lastName"	});
	factory.setPropertyChangeListener(new DummyPropertyChangeListener());
		
	//now we get the proxy object
	//all tracked setters invoked on this object
	//will fire the event
	Person proxy = factory.createWrapperProxy(real, Person.class);
	
	//try and see
	proxy.setFirstName("Someone");
	proxy.setLastName("Else");

Copyright (C) 2013 Goran Jovic

Distributed under the Eclipse Public License.