/******************************************************************************* | |
* Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved. | |
* This program and the accompanying materials are made available under the | |
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.indirection; | |
/** | |
* <b>Purpose</b>: | |
* Define an interface for a Container that can also act as an EclipseLink | |
* "indirection" object; i.e. the Container will only read its contents from | |
* the database when necessary (typically, on receipt of the first | |
* Container-related message). | |
* <p> | |
* | |
* @see org.eclipse.persistence.internal.indirection.TransparentIndirectionPolicy | |
* @author Big Country | |
* @since TOPLink/Java 2.5 | |
*/ | |
public interface IndirectContainer { | |
/** | |
* PUBLIC: | |
* This is used by the indirection policy to build the | |
* UOW clone of the container. | |
* @return org.eclipse.persistence.indirection.ValueHolderInterface A representation of the valueholder * which this container uses | |
*/ | |
public ValueHolderInterface getValueHolder(); | |
/** | |
* PUBLIC: | |
* Return whether the contents have been read from the database. | |
* This is used periodically by the indirection policy to determine whether | |
* to trigger the database read. | |
*/ | |
public boolean isInstantiated(); | |
/** | |
* PUBLIC: | |
* Set the valueHolder. | |
* This is used by the indirection policy to build the | |
* UOW clone of the container. | |
*/ | |
public void setValueHolder(ValueHolderInterface valueHolder); | |
} |