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/*******************************************************************************
* Copyright (c) 1998, 2015 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.internal.queries;
import java.util.*;
import org.eclipse.persistence.indirection.IndirectCollectionsFactory;
import org.eclipse.persistence.internal.sessions.AbstractSession;
/**
* PERF: Avoids reflection usage for IndirectList.
*
* @see ContainerPolicy
* @author Big Country
* @since TOPLink/Java 2.5
*/
public class IndirectListContainerPolicy extends ListContainerPolicy {
/**
* INTERNAL:
* Construct a new policy.
*/
public IndirectListContainerPolicy() {
super();
}
/**
* INTERNAL:
* Construct a new policy for the specified class.
*/
public IndirectListContainerPolicy(Class containerClass) {
super(containerClass);
}
/**
* INTERNAL:
* Return a clone of the specified container.
*/
public Object cloneFor(Object container) {
if (container == null) {
return null;
}
// Use Vector as new objects can have a Vector.
try {
return ((Vector)container).clone();
} catch (Exception notVector) {
// Could potentially be another Collection type as well.
return IndirectCollectionsFactory.createIndirectList((Collection)container);
}
}
/**
* INTERNAL:
* Just return the Vector.
*/
public Object buildContainerFromVector(Vector vector, AbstractSession session) {
return IndirectCollectionsFactory.createIndirectList(vector);
}
/**
* INTERNAL:
* Return a new Vector.
*/
public Object containerInstance() {
return IndirectCollectionsFactory.createIndirectList();
}
/**
* INTERNAL:
* Return a new Vector.
*/
public Object containerInstance(int initialCapacity) {
return IndirectCollectionsFactory.createIndirectList(initialCapacity);
}
}