net.sf.composite.specialize.specializers
Class Jdk13ProxySpecializer

java.lang.Object
  net.sf.composite.specialize.specializers.BaseSpecializer
      net.sf.composite.specialize.specializers.Jdk13ProxySpecializer

All Implemented Interfaces:

Specializer

public class Jdk13ProxySpecializer
extends BaseSpecializer
implements Specializer

A composite specializer that is implemented using JDK 1.3 proxies. This specializer requires that the composite to be specialized has a public no-argument constructor. It also requires that the specialized type be an interface, and any methods that are to be executed on the composite are expressed in a separate interface (i.e. they cannot be specified in the implementation class only). Finally, component access methods must be specified in an interface. The SimpleComposite, RegistryComposite etc. interfaces can be used for this purpose.

The main benefit of this specializer is that it does not require the composite to implement all the interfaces to which it may be specialized. The main drawback is that the use of JDK proxies is much slower than regular method calls (such as you would get when using the CloningSpecializer.

Since:

Mar 11, 2005

Author:

Matt Sgarlata

Field Summary

Fields inherited from class net.sf.composite.specialize.specializers.BaseSpecializer

log

Constructor Summary

Jdk13ProxySpecializer()

Method Summary

protected java.lang.reflect.InvocationHandler	createInvocationHandler(java.lang.Object composite)
protected java.lang.Object	createNewComposite(java.lang.Object composite)
protected boolean	isSpecializableImpl(java.lang.Object composite, java.lang.Class specializedType) Implementation template method.
protected java.lang.Object	specializeImpl(java.lang.Object composite, java.lang.Class specializedType)

Methods inherited from class net.sf.composite.specialize.specializers.BaseSpecializer

getComponentAccessor, isSpecializable, setComponentAccessor, specialize

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.composite.specialize.Specializer

isSpecializable, specialize

Constructor Detail

Jdk13ProxySpecializer

public Jdk13ProxySpecializer()

Method Detail

isSpecializableImpl

protected boolean isSpecializableImpl(java.lang.Object composite,
                                      java.lang.Class specializedType)
                               throws java.lang.Exception

Description copied from class: BaseSpecializer

Implementation template method.

Specified by:

isSpecializableImpl in class BaseSpecializer

Returns:

boolean

Throws:

java.lang.Exception

createNewComposite

protected java.lang.Object createNewComposite(java.lang.Object composite)
                                       throws java.lang.Exception

Throws:

java.lang.Exception

createInvocationHandler

protected java.lang.reflect.InvocationHandler createInvocationHandler(java.lang.Object composite)
                                                               throws java.lang.Exception

Throws:

java.lang.Exception

specializeImpl

protected java.lang.Object specializeImpl(java.lang.Object composite,
                                          java.lang.Class specializedType)
                                   throws java.lang.Exception

Specified by:

specializeImpl in class BaseSpecializer

Throws:

java.lang.Exception