/***********************************************************************
This file is part of KEEL-software, the Data Mining tool for regression,
classification, clustering, pattern mining and so on.
Copyright (C) 2004-2010
F. Herrera (herrera@decsai.ugr.es)
L. S�nchez (luciano@uniovi.es)
J. Alcal�-Fdez (jalcala@decsai.ugr.es)
S. Garc�a (sglopez@ujaen.es)
A. Fern�ndez (alberto.fernandez@ujaen.es)
J. Luengo (julianlm@decsai.ugr.es)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU 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/
**********************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* SerializedObject.java
* Copyright (C) 2001 University of Waikato, Hamilton, New Zealand
*
*/
package keel.Algorithms.SVM.SMO.core;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
/**
* Class for storing an object in serialized form in memory. It can be used
* to make deep copies of objects, and also allows compression to conserve
* memory. <p>
*
* @author Richard Kirkby (rbk1@cs.waikato.ac.nz)
* @version $Revision: 1.1 $
*/
public class SerializedObject
implements Serializable {
/** for serialization */
private static final long serialVersionUID = 6635502953928860434L;
/** The array storing the object. */
private byte[] m_storedObjectArray;
/** Whether or not the object is compressed. */
private boolean m_isCompressed;
/**
* Creates a new serialized object (without compression).
*
* @param toStore the object to store
* @exception Exception if the object couldn't be serialized
*/
public SerializedObject(Object toStore) throws Exception {
this(toStore, false);
}
/**
* Creates a new serialized object.
*
* @param toStore the object to store
* @param compress whether or not to use compression
* @exception Exception if the object couldn't be serialized
*/
public SerializedObject(Object toStore, boolean compress) throws Exception {
ByteArrayOutputStream ostream = new ByteArrayOutputStream();
OutputStream os = ostream;
ObjectOutputStream p;
if (!compress)
p = new ObjectOutputStream(new BufferedOutputStream(os));
else
p = new ObjectOutputStream(new BufferedOutputStream(new GZIPOutputStream(os)));
p.writeObject(toStore);
p.flush();
p.close(); // used to be ostream.close() !
m_storedObjectArray = ostream.toByteArray();
m_isCompressed = compress;
}
/*
* Checks to see whether this object is equal to another.
*
* @param compareTo the object to compare to
* @return whether or not the objects are equal
*/
public final boolean equals(Object compareTo) {
if (compareTo == null) return false;
if (!compareTo.getClass().equals(this.getClass())) return false;
byte[] compareArray = ((SerializedObject)compareTo).m_storedObjectArray;
if (compareArray.length != m_storedObjectArray.length) return false;
for (int i=0; i<compareArray.length; i++) {
if (compareArray[i] != m_storedObjectArray[i]) return false;
}
return true;
}
/**
* Returns a hashcode for this object.
*
* @return the hashcode
*/
public int hashCode() {
return m_storedObjectArray.length;
}
/**
* Returns a serialized object.
*
* @return the restored object
* @exception Exception if the object couldn't be restored
*/
public Object getObject() {
try {
ByteArrayInputStream istream = new ByteArrayInputStream(m_storedObjectArray);
ObjectInputStream p;
if (!m_isCompressed)
p = new ObjectInputStream(new BufferedInputStream(istream));
else
p = new ObjectInputStream(new BufferedInputStream(new GZIPInputStream(istream)));
Object toReturn = p.readObject();
istream.close();
return toReturn;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}