| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.persistence; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.openjpa.kernel.DelegatingExtent; |
| |
| /** |
| * An extent is a logical view of all instances of a class. |
| * |
| * @author Abe White |
| * @since 0.4.1 |
| */ |
| public class ExtentImpl<T> |
| implements Extent<T> { |
| |
| private final EntityManagerImpl _em; |
| private final DelegatingExtent _extent; |
| private FetchPlan _fetch = null; |
| |
| /** |
| * Constructor; supply delegate. |
| */ |
| public ExtentImpl(EntityManagerImpl em, org.apache.openjpa.kernel.Extent<T> extent) { |
| _em = em; |
| _extent = new DelegatingExtent(extent, |
| PersistenceExceptions.getRollbackTranslator(em)); |
| } |
| |
| /** |
| * Delegate. |
| */ |
| @Override |
| public org.apache.openjpa.kernel.Extent<T> getDelegate() { |
| return _extent.getDelegate(); |
| } |
| |
| @Override |
| public Class<T> getElementClass() { |
| return _extent.getElementType(); |
| } |
| |
| @Override |
| public boolean hasSubclasses() { |
| return _extent.hasSubclasses(); |
| } |
| |
| @Override |
| public OpenJPAEntityManager getEntityManager() { |
| return _em; |
| } |
| |
| @Override |
| public FetchPlan getFetchPlan() { |
| _em.assertNotCloseInvoked(); |
| _extent.lock(); |
| try { |
| if (_fetch == null) |
| _fetch = ((EntityManagerFactoryImpl) _em. |
| getEntityManagerFactory()).toFetchPlan(_extent.getBroker(), |
| _extent.getFetchConfiguration()); |
| return _fetch; |
| } finally { |
| _extent.unlock(); |
| } |
| } |
| |
| @Override |
| public boolean getIgnoreChanges() { |
| return _extent.getIgnoreChanges(); |
| } |
| |
| @Override |
| public void setIgnoreChanges(boolean ignoreChanges) { |
| _em.assertNotCloseInvoked(); |
| _extent.setIgnoreChanges(ignoreChanges); |
| } |
| |
| @Override |
| public List<T> list() { |
| _em.assertNotCloseInvoked(); |
| return _extent.list(); |
| } |
| |
| @Override |
| public Iterator<T> iterator() { |
| _em.assertNotCloseInvoked(); |
| return _extent.iterator(); |
| } |
| |
| @Override |
| public void closeAll() { |
| _extent.closeAll(); |
| } |
| |
| @Override |
| public int hashCode() { |
| return ((_extent == null) ? 0 : _extent.hashCode()); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other == this) |
| return true; |
| if ((other == null) || (other.getClass() != this.getClass())) |
| return false; |
| if (_extent == null) |
| return false; |
| |
| return _extent.equals(((ExtentImpl) other)._extent); |
| } |
| } |