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/*
* Copyright (c) 1998, 2018 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 v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.indirection;
/**
* <b>Purpose</b>: Interface to allow lazy loading of an object's relationships from the database.
*
* @see ValueHolder
* @see org.eclipse.persistence.internal.indirection.DatabaseValueHolder
*/
public interface ValueHolderInterface extends Cloneable {
/** Can be used to have transparent indirection toString instantiate the objects. */
public static boolean shouldToStringInstantiate = false;
/**
* PUBLIC:
* Copy the value holder (but not its' reference, shallow).
*/
public Object clone();
/**
* PUBLIC:
* Return the value.
*/
public Object getValue();
/**
* 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 value.
*/
public void setValue(Object value);
}
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