As a bit more detail....
The invocation handler has a selection of member variables, if set the
getters from the common interface return the proxy values, otherwise
they return the values from the referenced subject.
This is a snippet from the code:
public class MyProxy implements InvocationHandler
{
private static final String GET_NAME_METHOD = "getName";
private static final String GET_DESCRIPTION_METHOD = "getDescription";
private String _subjectId = null;
private transient MyInterface _subject = null;
private Class<? extends MyInterface> _subjectType = null;
private String _name = null;
private String _description = null;
public MyProxy(String subjectId, Class<? extends MyInterface> type,
String name, String description)
{
_subjectType = type;
_subjectId = subjectId;
_name = name;
_description = description;
}
private String getName()
{
...
}
private String getDescription()
{
...
}
/**
* @see java.lang.reflect.InvocationHandler#invoke(java.lang.Object,
java.lang.reflect.Method, java.lang.Object[])
*/
public Object invoke(Object obj, Method method, Object[] args)
throws Throwable
{
String methodName = method.getName();
if (GET_NAME_METHOD.equals(methodName))
{
return getName();
}
if (GET_DESCRIPTION_METHOD.equals(methodName))
{
return getDescription();
}
return method.invoke(obj, args);
}
}
Regards,
Mike
2009/5/26 Mike Watson <[email protected]>:
> Hi,
>
> If I have two classes C1 and C2, with valid bindings and implementing
> a common interface, and I want to use the java.lang.reflect.Proxy
> approach to create a dynamic proxy with either C1 or C2 as the subject
> (i.e. implementing an InvocationHandler). Is there any way I can
> create a binding for two instances of the dynamic proxies (say C1Proxy
> and C2Proxy)?
>
> It seems like I should be able to do this through the use of a factory
> and/or custom serializer but I can't quite see how I could reuse the
> same proxy code for both types. Can anyone think of how I might do
> this or am I dreaming?
>
> Regards,
>
> Mike
>
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