oracle.toplink.essentials.internal.queryframework.SortedCollectionContainerPolicy Maven / Gradle / Ivy
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* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
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// Copyright (c) 1998, 2007, Oracle. All rights reserved.
package oracle.toplink.essentials.internal.queryframework;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.util.Comparator;
import java.lang.reflect.Constructor;
import oracle.toplink.essentials.exceptions.*;
import oracle.toplink.essentials.internal.security.PrivilegedAccessHelper;
import oracle.toplink.essentials.internal.security.PrivilegedGetConstructorFor;
import oracle.toplink.essentials.internal.security.PrivilegedInvokeConstructor;
import oracle.toplink.essentials.internal.security.PrivilegedNewInstanceFromClass;
/**
* Purpose: A SortedCollectionContainerPolicy is ContainerPolicy whose
* container class implements the SortedInterface interface.
* Added for BUG # 3233263
*
*
Responsibilities:
* Provide the functionality to operate on an instance of a SortedSet.
*
* @see ContainerPolicy
* @see MapContainerPolicy
*/
public class SortedCollectionContainerPolicy extends CollectionContainerPolicy {
protected Comparator m_comparator = null;
/**
* INTERNAL:
* Construct a new policy.
*/
public SortedCollectionContainerPolicy() {
super();
}
/**
* INTERNAL:
* Construct a new policy for the specified class.
*/
public SortedCollectionContainerPolicy(Class containerClass) {
super(containerClass);
}
/**
* INTERNAL:
* Sets a comparator object for this policy to use when instantiating
* a new SortedSet object.
*/
public void setComparator(Comparator comparator) {
m_comparator = comparator;
}
/**
* INTERNAL:
* Return the stored comparator
*/
public Comparator getComparator() {
return m_comparator;
}
/**
* INTERNAL
* Override from ContainerPolicy. Need to maintain the comparator in the
* new instance
*/
public Object containerInstance() {
try {
if (m_comparator != null) {
Object[] arguments = new Object[] { m_comparator };
Class[] constructClass = new Class[] { Comparator.class };
Constructor constructor = null;
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
constructor = (Constructor)AccessController.doPrivileged(new PrivilegedGetConstructorFor(getContainerClass(), constructClass, false));
return AccessController.doPrivileged(new PrivilegedInvokeConstructor(constructor, arguments));
} catch (PrivilegedActionException exception) {
throw QueryException.couldNotInstantiateContainerClass(getContainerClass(), exception.getException());
}
} else {
constructor = PrivilegedAccessHelper.getConstructorFor(getContainerClass(), constructClass, false);
return PrivilegedAccessHelper.invokeConstructor(constructor, arguments);
}
} else {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
return AccessController.doPrivileged(new PrivilegedNewInstanceFromClass(getContainerClass()));
} catch (PrivilegedActionException exception) {
throw QueryException.couldNotInstantiateContainerClass(getContainerClass(), exception.getException());
}
} else {
return PrivilegedAccessHelper.newInstanceFromClass(getContainerClass());
}
}
} catch (Exception ex) {
throw QueryException.couldNotInstantiateContainerClass(getContainerClass(), ex);
}
}
}