/*
* JBoss, Home of Professional Open Source.
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY 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 along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.serial.objectmetamodel;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import org.apache.log4j.Logger;
import org.jboss.serial.classmetamodel.ClassMetaData;
import org.jboss.serial.classmetamodel.ClassMetamodelFactory;
import org.jboss.serial.classmetamodel.StreamingClass;
import org.jboss.serial.exception.SerializationException;
import org.jboss.serial.objectmetamodel.ObjectsCache.JBossSeralizationInputInterface;
import org.jboss.serial.objectmetamodel.ObjectsCache.JBossSeralizationOutputInterface;
import org.jboss.serial.persister.ClassReferencePersister;
import org.jboss.serial.persister.PersistResolver;
import org.jboss.serial.persister.Persister;
import org.jboss.serial.util.ClassMetaConsts;
/**
* @author <a href="clebert.suconic@jboss.com">Clebert Suconic</a>
* @author <a href="ron.sigal@jboss.com">Ron Sigal</a>
* @version
* <p>
* Copyright Feb 1, 2009
* </p>
*/
public class DefaultObjectDescriptorStrategy implements ObjectDescriptorStrategy, ClassMetaConsts
{
private static final Logger log = Logger.getLogger(DefaultObjectDescriptorStrategy.class);
private static final boolean isDebug = log.isDebugEnabled();
public boolean writeObjectSpecialCase(JBossSeralizationOutputInterface output, ObjectsCache cache, Object obj) throws IOException
{
if (obj==null)
{
output.writeByte(DataContainerConstants.NULLREF);
return true;
}
if (obj!=null && ClassMetamodelFactory.isImmutable(obj.getClass()))
{
output.saveImmutable(cache,obj);
return true;
}
return false;
}
public boolean writeDuplicateObject(JBossSeralizationOutputInterface output, ObjectsCache cache, Object obj, ClassMetaData metaData) throws IOException
{
int description = cache.findIdInCacheWrite(obj, metaData.isImmutable());
if (description != 0)
{
if (isDebug)
{
log.debug("describeObject::a circular reference " + description);
}
output.writeByte(DataContainerConstants.OBJECTREF);
cache.getOutput().addObjectReference(description);
return true;
}
return false;
}
public Object replaceObjectByClass(ObjectsCache cache, Object obj, ClassMetaData metaData) throws IOException
{
if (obj instanceof Class)
{
return obj;
}
if (metaData.getWriteReplaceMethod()!=null)
{
if (isDebug)
{
log.debug("describeObject::Calling writeReplace for " + metaData.getClazz().getName());
}
try {
return metaData.getWriteReplaceMethod().invoke(obj,EMPTY_OBJECT_ARRAY);
} catch (Exception e) {
IOException io = new IOException("Metadata Serialization Error");
io.initCause(e);
throw io;
}
}
return obj;
}
public Object replaceObjectByStream(ObjectsCache cache, Object obj, ClassMetaData metaData) throws IOException
{
if (cache.getSubstitution()!=null)
{
if (isDebug)
{
log.debug("describeObject::checking substitution on interface");
}
return cache.getSubstitution().replaceObject(obj);
}
return obj;
}
public boolean doneReplacing(ObjectsCache cache, Object newObject, Object oldObject, ClassMetaData oldMetaData) throws IOException
{
return (newObject == null || newObject==oldObject || newObject.getClass()==oldMetaData.getClazz());
}
public void writeObject(JBossSeralizationOutputInterface output, ObjectsCache cache, ClassMetaData metadata, Object obj) throws IOException
{
Persister persister = PersistResolver.resolvePersister(obj,metadata);
output.writeByte(persister.getId());
persister.writeData(metadata, cache.getOutput(), obj, cache.getSubstitution());
}
public Object readObjectSpecialCase(JBossSeralizationInputInterface input, ObjectsCache cache, byte byteIdentify) throws IOException
{
return input.readImmutable(byteIdentify,cache);
}
public Object readObject(JBossSeralizationInputInterface input, ObjectsCache cache, StreamingClass streamingClass, int reference) throws IOException
{
ClassMetaData metaData = streamingClass.getMetadata();
if (isDebug)
{
log.debug("Reading object for id=" + reference + " classLoader=" + cache.getLoader() + " className = " + metaData.getClassName());
}
byte persisterId = input.readByte();
Persister persister = PersistResolver.resolvePersister(persisterId);
//Persister persister = PersistResolver.resolvePersister(description.getMetaData().getClazz(),
// description.getMetaData(),description.getMetaData().isArray());
/*ObjectDescription description = new ObjectDescription();
description.setMetaData(ClassMetamodelFactory.getClassMetaData(reference.getClassName(),cache.getLoader(),false));
cache.putObjectInCache(reference,description); */
Object value = persister.readData(cache.getLoader(), streamingClass, metaData, reference, cache, cache.getInput(), cache.getSubstitution());
if (!(persister instanceof ClassReferencePersister)) //JBSER-83
{
if (cache.getSubstitution()!=null)
{
value = cache.getSubstitution().replaceObject(value);
}
try
{
if (metaData.getReadResolveMethod()!=null)
{
if (isDebug)
{
log.debug("readObjectDescriptionFromStreaming::calling readResolve for className = " + metaData.getClassName());
}
value = metaData.getReadResolveMethod().invoke(value,new Object[]{});
cache.reassignObjectInCacheRead(reference,value);
}
}
catch (IllegalAccessException e)
{
throw new SerializationException(e);
}
catch (InvocationTargetException e)
{
throw new SerializationException(e);
}
}
return value;
}
}