/*
* 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
* @nojavadoc
*/
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 extent) {
_em = em;
_extent = new DelegatingExtent(extent,
PersistenceExceptions.getRollbackTranslator(em));
}
/**
* Delegate.
*/
public org.apache.openjpa.kernel.Extent getDelegate() {
return _extent.getDelegate();
}
public Class<T> getElementClass() {
return _extent.getElementType();
}
public boolean hasSubclasses() {
return _extent.hasSubclasses();
}
public OpenJPAEntityManager getEntityManager() {
return _em;
}
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();
}
}
public boolean getIgnoreChanges() {
return _extent.getIgnoreChanges();
}
public void setIgnoreChanges(boolean ignoreChanges) {
_em.assertNotCloseInvoked();
_extent.setIgnoreChanges(ignoreChanges);
}
public List<T> list() {
_em.assertNotCloseInvoked();
return _extent.list();
}
public Iterator<T> iterator() {
_em.assertNotCloseInvoked();
return _extent.iterator();
}
public void closeAll() {
_extent.closeAll();
}
public int hashCode() {
return _extent.hashCode();
}
public boolean equals(Object other) {
if (other == this)
return true;
if (!(other instanceof ExtentImpl))
return false;
return _extent.equals(((ExtentImpl) other)._extent);
}
}