/*
* Copyright (C) 2009 eXo Platform SAS.
*
* 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.exoplatform.services.jcr.dataflow.persistent;
import org.exoplatform.services.jcr.datamodel.IllegalPathException;
import org.exoplatform.services.jcr.datamodel.ItemData;
import org.exoplatform.services.jcr.datamodel.QPath;
import org.exoplatform.services.jcr.impl.Constants;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
/**
* Created by The eXo Platform SAS. <br>
*
* Immutable ItemData from persistent storage
*
* @author Gennady Azarenkov
* @version $Id$
*/
public abstract class PersistedItemData implements ItemData, Externalizable
{
/**
* SerialVersionUID to serialization.
*/
private static final long serialVersionUID = -3845740801904303663L;
protected String id;
protected QPath qpath;
protected String parentId;
protected int version;
private final static int NOT_NULL_VALUE = 1;
private final static int NULL_VALUE = -1;
/**
* Empty constructor to serialization.
*/
public PersistedItemData()
{
}
public PersistedItemData(String id, QPath qpath, String parentId, int version)
{
if (id.equals(parentId))
{
throw new IllegalArgumentException("Item can't have itself as parent.");
}
this.id = id;
this.qpath = qpath;
this.parentId = parentId;
this.version = version;
}
/**
* @see org.exoplatform.services.jcr.datamodel.ItemData#getQPath()
*/
public QPath getQPath()
{
return qpath;
}
/**
* @see org.exoplatform.services.jcr.datamodel.ItemData#getIdentifier()
*/
public String getIdentifier()
{
return id;
}
/**
* @see org.exoplatform.services.jcr.datamodel.ItemData#getPersistedVersion()
*/
public int getPersistedVersion()
{
return version;
}
/**
* @see org.exoplatform.services.jcr.datamodel.ItemData#getParentIdentifier()
*/
public String getParentIdentifier()
{
return parentId;
}
/**
* @see java.lang.Object#equals(java.lang.Object)
*/
public boolean equals(Object obj)
{
if (obj == this)
{
return true;
}
if (obj == null)
{
return false;
}
if (obj instanceof ItemData)
{
return getIdentifier().hashCode() == ((ItemData)obj).getIdentifier().hashCode();
}
return false;
}
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
{
byte[] buf;
try
{
buf = new byte[in.readInt()];
in.readFully(buf);
String sQPath = new String(buf, Constants.DEFAULT_ENCODING);
qpath = QPath.parse(sQPath);
}
catch (final IllegalPathException e)
{
throw new IOException("Deserialization error. " + e)
{
/**
* {@inheritDoc}
*/
@Override
public Throwable getCause()
{
return e;
}
};
}
buf = new byte[in.readInt()];
in.readFully(buf);
id = new String(buf);
int isNull = in.readInt();
if (isNull == NOT_NULL_VALUE)
{
buf = new byte[in.readInt()];
in.readFully(buf);
parentId = new String(buf);
}
version = in.readInt();
}
public void writeExternal(ObjectOutput out) throws IOException
{
byte[] buf = qpath.getAsString().getBytes(Constants.DEFAULT_ENCODING);
out.writeInt(buf.length);
out.write(buf);
out.writeInt(id.getBytes().length);
out.write(id.getBytes());
if (parentId != null)
{
out.writeInt(NOT_NULL_VALUE);
out.writeInt(parentId.getBytes().length);
out.write(parentId.getBytes());
}
else
{
out.writeInt(NULL_VALUE);
}
out.writeInt(version);
}
/**
* @see java.lang.Object#toString()
*/
@Override
public String toString()
{
return this.getClass().getSimpleName() + " [id=" + id + ", qpath=" + qpath + ", parentId=" + parentId + ", version=" + version
+ "]";
}
}