org.eclipse.persistence.internal.identitymaps.IdentityMapKeyEnumeration Maven / Gradle / Ivy
/*
* Copyright (c) 1998, 2020 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 java.util.*;
/**
* Allows to iterate over {@link CacheKey} instances stored in the {@link IdentityMap}.
*/
public class IdentityMapKeyEnumeration extends AbstractIdentityMapEnumeration {
/**
* Creates an instance of {@link CacheKey} instances enumeration.
* Checking of read lock on the {@link CacheKey} instances is turned on.
*
* @param keys {@link Collection} of {@link CacheKey} instances to be iterated
*/
public IdentityMapKeyEnumeration(Collection keys) {
super(keys, true);
}
/**
* Creates an instance of {@link CacheKey} instances enumeration.
*
* @param keys {@link Collection} of {@link CacheKey} instances to be iterated
* @param shouldCheckReadLocks value of {@code true} if read lock on the {@link CacheKey}
* instances should be checked or {@code false} otherwise
*/
public IdentityMapKeyEnumeration(Collection keys, boolean shouldCheckReadLocks) {
super(keys, shouldCheckReadLocks);
}
/**
* Get next element of {@link CacheKey} enumeration if this enumeration
* object has at least one more element to provide.
*
* @return the next element of this enumeration
* @exception NoSuchElementException if no more elements exist
*/
@Override
public CacheKey nextElement() {
return getNextElement();
}
}