| /* |
| * 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<CacheKey> { |
| |
| /** |
| * 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<CacheKey> 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<CacheKey> 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(); |
| } |
| |
| } |