package org.mandarax.zkb;
/*
* Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.beans.XMLDecoder;
import java.beans.XMLEncoder;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
import org.mandarax.util.xmlser.LogExceptionListener;
/**
* Object persistency service based on XML serialization.
* <strong>Warning:</strong>Requires JDK 1.4 or better!
* @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
* @version 3.4 <7 March 05>
* @since 2.2
*/
public class XMLSerializationOPS extends AbstractOPS {
/**
* Export objects.
* @param out an output stream
* @exception an io exception
*/
public void exportObjects(OutputStream out) throws IOException {
XMLEncoder encoder = new XMLEncoder(out);
encoder.setExceptionListener(new LogExceptionListener());
encoder.writeObject(objectsByUri);
encoder.close();
}
/**
* Import objects.
* @param in an input stream
* @exception an io exception
*/
public void importObjects(InputStream in) throws IOException {
// buffer, otherwise closing the decoder closes the stream
ByteArrayOutputStream buf = new ByteArrayOutputStream();
byte b = -1;
while ((b=(byte)in.read())>-1) buf.write(b);
InputStream bin = new ByteArrayInputStream(buf.toByteArray());
XMLDecoder decoder = new XMLDecoder(bin);
decoder.setExceptionListener(new LogExceptionListener());
reset();
objectsByUri = (Map)decoder.readObject();
reverseMap(objectsByUri,urisByObject);
decoder.close();
}
/**
* Get name.
* @return the name of the service
*/
public String getName() {
return "XML serialization";
}
/**
* Get a brief description.
* @return a brief description of the service
*/
public String getDescription() {
return "Object persistency service based on JDK XML serialization, requires JDK 1.4 or better";
}
/**
* Get the extension of the associated files.
* @return a file extension
*/
public String getExtension() {
return "xml";
}
}
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