ome.model.internal

Class GraphHolder

java.lang.Object

ome.model.internal.GraphHolder

public final class GraphHolder
extends Object

holds information regarding the graph to which an IObject belongs. hasToken(), tokenMatches(Token), and setToken(Token, Token) are final so that subclasses cannot intercept tokens.

Since:

3.0

Version:

3.0 (Internal version: $Rev$ $Date$)

Author:

Josh Moore josh.moore@gmx.de, josh

Constructor Summary

Constructors

Constructor and Description
GraphHolder()

Method Summary

Methods

Modifier and Type	Method and Description
IObject	getReplacement() a replacement is a managed entity instance which has the same primary key as this instance.
boolean	hasToken() tests if this GraphHolder contains a Token reference.
void	setReplacement(IObject replacement) used mostly by IUpdate.
void	setToken(Token previousToken, Token newToken) set the Token for this GraphHolder but only if you posses the current Token.
boolean	tokenMatches(Token token) check the Token for the IObject represented by this GraphHolder.

Methods inherited from class java.lang.Object

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

Constructor Detail

GraphHolder

public GraphHolder()

Method Detail

getReplacement

public IObject getReplacement()

a replacement is a managed entity instance which has the same primary key as this instance. Storing this value here allows for several optimizations.

Returns:

entity

setReplacement

public void setReplacement(IObject replacement)

used mostly by IUpdate. Improper use of this method may cause erratic behavior.

Parameters:

replacement -

hasToken

public final boolean hasToken()

tests if this GraphHolder contains a Token reference.

tokenMatches

public final boolean tokenMatches(Token token)

check the Token for the IObject represented by this GraphHolder. This can be seen to approximate "ownership" of this Object within the JVM.

Returns:

true only if the two instances are identical.

setToken

public final void setToken(Token previousToken,
            Token newToken)

set the Token for this GraphHolder but only if you posses the current Token. The first call to setToken(Token, Token) will succeed when token is null.

Parameters:

previousToken -

newToken -