/*
* JBoss, Home of Professional Open Source
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags.
* See the copyright.txt in the distribution for a full listing
* of individual contributors.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* (C) 2005-2006,
* @author JBoss Inc.
*/
package com.arjuna.mwlabs.wst.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import com.arjuna.ats.arjuna.state.InputObjectState;
import com.arjuna.ats.arjuna.state.OutputObjectState;
import com.arjuna.mw.wstx.logging.wstxLogger;
import com.arjuna.webservices.util.ClassLoaderHelper;
import com.arjuna.wst.PersistableParticipant;
/**
* Helper class for persisting participants.
* @author kevin
*/
public class PersistableParticipantHelper
{
/**
* Save the resource state.
* @param os The output object stream.
* @param resource The resource to persist.
* @return true if successful, false otherwise.
* @message com.arjuna.mwlabs.wst.util.PersistableParticipantHelper_1 [com.arjuna.mwlabs.wst.util.PersistableParticipantHelper_1] - Participant not persistable.
* @message com.arjuna.mwlabs.wst.util.PersistableParticipantHelper_2 [com.arjuna.mwlabs.wst.util.PersistableParticipantHelper_2] - Error persisting participant.
*/
public static boolean save_state(final OutputObjectState os, final Object resource)
{
if (resource != null)
{
try
{
if (resource instanceof Serializable)
{
os.packBoolean(true) ;
final ByteArrayOutputStream baos = new ByteArrayOutputStream() ;
final ObjectOutputStream oos = new ObjectOutputStream(baos) ;
oos.writeObject(resource) ;
oos.flush() ;
os.packBytes(baos.toByteArray()) ;
}
else if (resource instanceof PersistableParticipant)
{
final PersistableParticipant participant = (PersistableParticipant)resource ;
os.packBoolean(false) ;
os.packString(resource.getClass().getName()) ;
participant.saveState(os) ;
}
else
{
wstxLogger.arjLoggerI18N.error("com.arjuna.mwlabs.wst.util.PersistableParticipantHelper_1") ;
return false ;
}
return true ;
}
catch(final Throwable th)
{
wstxLogger.arjLoggerI18N.error("com.arjuna.mwlabs.wst.util.PersistableParticipantHelper_2", th) ;
return false ;
}
}
else
return false;
}
/**
* Restore the resource state.
* @param is The input object stream.
* @return The resource if successful, null otherwise.
* @message com.arjuna.mwlabs.wst.util.PersistableParticipantHelper_3 [com.arjuna.mwlabs.wst.util.PersistableParticipantHelper_3] - Error restoring participant.
*/
public static Object restore_state(final InputObjectState ios)
{
try
{
final boolean serializable = ios.unpackBoolean() ;
if (serializable)
{
final ByteArrayInputStream bais = new ByteArrayInputStream(ios.unpackBytes()) ;
final ObjectInputStream ois = new ObjectInputStream(bais) ;
return ois.readObject() ;
}
else
{
final String className = ios.unpackString() ;
final Class resourceClass = ClassLoaderHelper.forName(PersistableParticipantHelper.class, className) ; // returns Class not instance
final Object resource = resourceClass.newInstance();
((PersistableParticipant)resource).restoreState(ios) ;
return resource ;
}
}
catch (final Throwable th)
{
wstxLogger.arjLoggerI18N.error("com.arjuna.mwlabs.wst.util.PersistableParticipantHelper_3", th) ;
return null ;
}
}
}