001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.hibernate;
023
024import java.io.IOException;
025import java.io.ObjectInput;
026import java.io.Serializable;
027import java.util.Collections;
028import java.util.List;
029import java.util.concurrent.ConcurrentHashMap;
030
031import org.granite.messaging.amf.io.util.instantiator.AbstractInstantiator;
032import org.hibernate.proxy.HibernateProxy;
033
034/**
035 * @author Franck WOLFF
036 */
037public class HibernateProxyInstantiator extends AbstractInstantiator<HibernateProxy> {
038
039    private static final long serialVersionUID = 1L;
040
041    private final ConcurrentHashMap<String, ProxyFactory> proxyFactories;
042    private final String detachedState;
043    private Serializable id;
044
045    public HibernateProxyInstantiator(ConcurrentHashMap<String, ProxyFactory> proxyFactories, String detachedState) {
046        if (detachedState == null)
047            throw new IllegalStateException("Cannot create Hibernate proxy without detachedState");
048        this.proxyFactories = proxyFactories;
049        this.detachedState = detachedState;
050    }
051
052    public void readId(ObjectInput in) throws IOException, ClassNotFoundException {
053        this.id = (Serializable)in.readObject();
054    }
055
056    protected Serializable getId() {
057        return id;
058    }
059
060    @Override
061    public List<String> getOrderedFieldNames() {
062        return Collections.emptyList();
063    }
064
065    @Override
066    public HibernateProxy newInstance() throws IOException, ClassNotFoundException, InstantiationException {
067        final String[] tokens = detachedState.split("\\Q:\\E", -1);
068
069        ProxyFactory factory = proxyFactories.get(tokens[0]);
070        if (factory == null) {
071            factory = newProxyFactory(tokens[0]);
072            ProxyFactory previousFactory = proxyFactories.putIfAbsent(tokens[0], factory);
073            if (previousFactory != null)
074                factory = previousFactory;
075        }
076
077        return factory.getProxyInstance(tokens[1], tokens[2], id);
078    }
079    
080    protected ProxyFactory newProxyFactory(String initializerClassName) {
081        return new ProxyFactory(initializerClassName);
082    }
083}