/*
* Copyright (C) 2003-2010 eXo Platform SAS.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see<http://www.gnu.org/licenses/>.
*/
package org.exoplatform.services.jcr.datamodel;
import org.exoplatform.services.jcr.dataflow.ItemDataVisitor;
import org.exoplatform.services.jcr.impl.Constants;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import javax.jcr.RepositoryException;
/**
* Created by The eXo Platform SAS.
*
* <br>Date:
*
* @author <a href="karpenko.sergiy@gmail.com">Karpenko Sergiy</a>
* @version $Id: NullItemData.java 111 2008-11-11 11:11:11Z serg $
*/
public abstract class NullItemData implements ItemData, Externalizable
{
public static final String NULL_ID = "_null_id";
private String id;
private String parentId;
private QPathEntry name;
private QPath path;
public NullItemData(NodeData parent, QPathEntry name)
{
this.parentId = parent.getIdentifier();
this.path = QPath.makeChildPath(parent.getQPath(), name);
this.name = name;
this.id = NULL_ID;
}
public NullItemData(String id)
{
this.id = id;
}
public NullItemData()
{
this(NULL_ID);
}
public void accept(ItemDataVisitor visitor) throws RepositoryException
{
throw new UnsupportedOperationException("Method is not supported");
}
public String getIdentifier()
{
return id;
}
public String getParentIdentifier()
{
return parentId;
}
public int getPersistedVersion()
{
throw new UnsupportedOperationException("Method is not supported");
}
public QPath getQPath()
{
return path;
}
public QPathEntry getName()
{
return name;
}
/**
* {@inheritDoc}
*
* We need to make it serializable mostly for distributed cache in case we
* don't allow local caching
*/
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
{
byte[] buf = new byte[in.readInt()];
in.readFully(buf);
id = new String(buf, Constants.DEFAULT_ENCODING);
int length = in.readInt();
if (length > 0)
{
buf = new byte[length];
in.readFully(buf);
parentId = new String(buf, Constants.DEFAULT_ENCODING);
}
length = in.readInt();
if (length > 0)
{
buf = new byte[length];
in.readFully(buf);
try
{
name = QPathEntry.parse(new String(buf, Constants.DEFAULT_ENCODING));
}
catch (Exception e)
{
throw new IOException("Deserialization error, could not parse the name. ", e);
}
}
length = in.readInt();
if (length > 0)
{
buf = new byte[length];
in.readFully(buf);
try
{
path = QPath.parse(new String(buf, Constants.DEFAULT_ENCODING));
}
catch (Exception e)
{
throw new IOException("Deserialization error, could not parse the path. ", e);
}
}
}
/**
* {@inheritDoc}
*
* We need to make it serializable mostly for distributed cache in case we
* don't allow local caching
*/
public void writeExternal(ObjectOutput out) throws IOException
{
byte[] buf = id.getBytes(Constants.DEFAULT_ENCODING);
out.writeInt(buf.length);
out.write(buf);
if (parentId == null)
{
out.writeInt(-1);
}
else
{
buf = parentId.getBytes(Constants.DEFAULT_ENCODING);
out.writeInt(buf.length);
out.write(buf);
}
if (name == null)
{
out.writeInt(-1);
}
else
{
buf = name.getAsString(true).getBytes(Constants.DEFAULT_ENCODING);
out.writeInt(buf.length);
out.write(buf);
}
if (path == null)
{
out.writeInt(-1);
}
else
{
buf = path.getAsString().getBytes(Constants.DEFAULT_ENCODING);
out.writeInt(buf.length);
out.write(buf);
}
}
}