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ojb.broker
Class VirtualProxy  

java.lang.Object
  ojb.broker.VirtualProxy

All Implemented Interfaces:

java.io.Serializable

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public abstract class VirtualProxy

extends java.lang.Object

implements java.io.Serializable

Proxy base class. can be used to implement lazy materialization techniques.

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Field Summary
private  ojb.broker.accesslayer.IndirectionHandler	indirectionHandler           reference to the IndirectionHandler that encapsulates the delegation mechanism

 

Constructor Summary

VirtualProxy()

VirtualProxy(Identity oid)           create a VirtualProxy from an identity

VirtualProxy(java.lang.reflect.InvocationHandler handler)           create a VirtualProxy from an identity

 

Method Summary
boolean	alreadyMaterialized()           returns true if the real subject already been loaded
static java.lang.Object	createProxy(java.lang.Class proxyClass, Identity realSubjectsIdentity)           static factory method creates VirtualProxy instances of a given subclass and an real subjects identity.
(package private)  Identity	getIdentity()
static ojb.broker.accesslayer.IndirectionHandler	getIndirectionHandler(VirtualProxy proxy)
java.lang.Object	getRealSubject()           returns the proxies real subject.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

indirectionHandler

private ojb.broker.accesslayer.IndirectionHandler indirectionHandler

reference to the IndirectionHandler that encapsulates the delegation mechanism

Constructor Detail

VirtualProxy

public VirtualProxy()

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VirtualProxy

public VirtualProxy(Identity oid)

create a VirtualProxy from an identity

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VirtualProxy

public VirtualProxy(java.lang.reflect.InvocationHandler handler)

create a VirtualProxy from an identity

Method Detail

getIndirectionHandler

public static ojb.broker.accesslayer.IndirectionHandler getIndirectionHandler(VirtualProxy proxy)

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alreadyMaterialized

public boolean alreadyMaterialized()

returns true if the real subject already been loaded

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createProxy

public static java.lang.Object createProxy(java.lang.Class proxyClass,
                                           Identity realSubjectsIdentity)
                                    throws java.lang.InstantiationException,
                                           java.lang.IllegalAccessException,
                                           java.lang.NoSuchMethodException,
                                           java.lang.reflect.InvocationTargetException

static factory method creates VirtualProxy instances of a given subclass and an real subjects identity.

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getRealSubject

public java.lang.Object getRealSubject()
                                throws PersistenceBrokerException

returns the proxies real subject. The subject will be materialized if necessary.

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getIdentity

Identity getIdentity()

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