ojb.broker.accesslayer
Class IndirectionHandler

java.lang.Object
  |
  +--ojb.broker.accesslayer.IndirectionHandler

All Implemented Interfaces:

java.lang.reflect.InvocationHandler, java.io.Serializable

public class IndirectionHandler

extends java.lang.Object

implements java.lang.reflect.InvocationHandler, java.io.Serializable

See Also:

Serialized Form

Constructor Summary

IndirectionHandler(Identity oid)

Method Summary

void	addListener(MaterializationListener l)
protected void	afterMaterialization()
boolean	alreadyMaterialized() returns true if the real subject already been loaded
protected void	beforeMaterialization()
protected PersistenceBroker	getBroker()
Identity	getIdentity()
java.lang.Object	getRealSubject() returns the proxies real subject.
java.lang.Object	invoke(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[] args) Processes a method invocation on a proxy instance and returns the result.
void	removeListener(MaterializationListener l)

Methods inherited from class java.lang.Object

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

Constructor Detail

IndirectionHandler

public IndirectionHandler(Identity oid)

Method Detail

addListener

public void addListener(MaterializationListener l)

removeListener

public void removeListener(MaterializationListener l)

beforeMaterialization

protected void beforeMaterialization()

afterMaterialization

protected void afterMaterialization()

getIdentity

public Identity getIdentity()

getBroker

protected PersistenceBroker getBroker()
                               throws PersistenceBrokerException

PersistenceBrokerException

invoke

public java.lang.Object invoke(java.lang.Object proxy,
                               java.lang.reflect.Method method,
                               java.lang.Object[] args)
                        throws java.lang.Throwable

Processes a method invocation on a proxy instance and returns the result. This method will be invoked on an invocation handler when a method is invoked on a proxy instance that it is associated with.

Specified by:

invoke in interface java.lang.reflect.InvocationHandler

Parameters:

proxy - the proxy instance that the method was invoked on

method - the Method instance corresponding to the interface method invoked on the proxy instance. The declaring class of the Method object will be the interface that the method was declared in, which may be a superinterface of the proxy interface that the proxy class inherits the method through.

args - an array of objects containing the values of the arguments passed in the method invocation on the proxy instance, or null if interface method takes no arguments. Arguments of primitive types are wrapped in instances of the appropriate primitive wrapper class, such as java.lang.Integer or java.lang.Boolean.

Returns:

the value to return from the method invocation on the proxy instance. If the declared return type of the interface method is a primitive type, then the value returned by this method must be an instance of the corresponding primitive wrapper class; otherwise, it must be a type assignable to the declared return type. If the value returned by this method is null and the interface method's return type is primitive, then a NullPointerException will be thrown by the method invocation on the proxy instance. If the value returned by this method is otherwise not compatible with the interface method's declared return type as described above, a ClassCastException will be thrown by the method invocation on the proxy instance.

Throws:

java.lang.Throwable - the exception to throw from the method invocation on the proxy instance. The exception's type must be assignable either to any of the exception types declared in the throws clause of the interface method or to the unchecked exception types java.lang.RuntimeException or java.lang.Error. If a checked exception is thrown by this method that is not assignable to any of the exception types declared in the throws clause of the interface method, then an UndeclaredThrowableException containing the exception that was thrown by this method will be thrown by the method invocation on the proxy instance.

See Also:

UndeclaredThrowableException

getRealSubject

public java.lang.Object getRealSubject()
                                throws PersistenceBrokerException

returns the proxies real subject. The subject will be materialized if necessary. Creation date: (08.11.2000 21:42:40)

PersistenceBrokerException

alreadyMaterialized

public boolean alreadyMaterialized()

returns true if the real subject already been loaded