org.eclipse.persistence.internal.identitymaps.NoIdentityMap Maven / Gradle / Ivy
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/*
* Copyright (c) 1998, 2024 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
// 12/14/2017-3.0 Tomas Kraus
// - 522635: ConcurrentModificationException when triggering lazy load from conforming query
package org.eclipse.persistence.internal.identitymaps;
import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.indirection.ValueHolderInterface;
import org.eclipse.persistence.internal.sessions.AbstractSession;
import org.eclipse.persistence.mappings.ForeignReferenceMapping;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Map;
import java.util.Set;
/**
* Purpose: Provide the capability to not cache objects at all.
*
Responsibilities:
* - Do nothing when an object is cached.
*
* @since TOPLink/Java 1.0
*/
public class NoIdentityMap extends AbstractIdentityMap {
public NoIdentityMap(int size, ClassDescriptor descriptor, AbstractSession session, boolean isolated) {
super(size, descriptor, session, isolated);
}
/**
* NoIdentityMap has no locks.
*/
@Override
public void collectLocks(Map> threadList) {
return;
}
/**
* Return an empty enumerator.
*/
@Override
public Enumeration