001    /**
002     *  Licensed to the Apache Software Foundation (ASF) under one or more
003     *  contributor license agreements.  See the NOTICE file distributed with
004     *  this work for additional information regarding copyright ownership.
005     *  The ASF licenses this file to You under the Apache License, Version 2.0
006     *  (the "License"); you may not use this file except in compliance with
007     *  the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    package org.apache.geronimo.naming.reference;
018    
019    import javax.naming.NameNotFoundException;
020    
021    import org.apache.geronimo.gbean.AbstractName;
022    import org.apache.geronimo.gbean.AbstractNameQuery;
023    import org.apache.geronimo.kernel.GBeanNotFoundException;
024    import org.apache.geronimo.kernel.Kernel;
025    import org.apache.geronimo.kernel.repository.Artifact;
026    
027    /**
028     * @version $Rev: 534748 $ $Date: 2007-05-03 04:07:09 -0400 (Thu, 03 May 2007) $
029     */
030    public class PersistenceUnitReference extends ConfigurationAwareReference {
031    
032    
033        public PersistenceUnitReference(Artifact[] configId, AbstractNameQuery abstractNameQuery) {
034            super(configId, abstractNameQuery);
035        }
036    
037        public String getClassName() {
038            return "javax.persistence.EntityManagerFactory";
039        }
040    
041        public Object getContent() throws NameNotFoundException {
042        Kernel kernel = getKernel();
043    
044        AbstractName target;
045        try {
046            target = resolveTargetName();
047        } catch (GBeanNotFoundException e) {
048            throw (NameNotFoundException) new NameNotFoundException("Could not resolve name query: " + abstractNameQueries).initCause(e);
049        }
050    
051        Object entityManagerFactory;
052        try {
053            entityManagerFactory = kernel.getAttribute(target, "entityManagerFactory");
054        } catch (Exception e) {
055            throw (IllegalStateException) new IllegalStateException("Could not get EntityManagerFactory").initCause(e);
056        }
057        if (entityManagerFactory == null) {
058            throw new IllegalStateException("entity manager not returned. Target " + target + " not started");
059        }
060        return entityManagerFactory;
061    }
062    }