/* Copyright (C) 2002 Univ. of Massachusetts Amherst, Computer Science Dept.
This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit).
http://www.cs.umass.edu/~mccallum/mallet
This software is provided under the terms of the Common Public License,
version 1.0, as published by http://www.opensource.org. For further
information, see the file `LICENSE' included with this distribution. */
/**
Include in the FeatureVector conjunctions of all its features.
Only works with binary FeatureVectors.
@author Andrew McCallum <a href="mailto:mccallum@cs.umass.edu">mccallum@cs.umass.edu</a>
*/
package cc.mallet.pipe;
import java.io.*;
import cc.mallet.types.FeatureSequence;
import cc.mallet.types.FeatureVector;
import cc.mallet.types.Instance;
// This class does not insist on getting its own Alphabet because it can rely on getting
// it from the FeatureSequence input.
/**
Include in the FeatureVector conjunctions of all its features.
Only works with binary FeatureVectors.
@author Andrew McCallum <a href="mailto:mccallum@cs.umass.edu">mccallum@cs.umass.edu</a>
*/
public class FeatureVectorConjunctions extends Pipe implements Serializable
{
public FeatureVectorConjunctions ()
{
super();
}
public Instance pipe (Instance carrier)
{
FeatureVector fv = (FeatureVector) carrier.getData();
carrier.setData(new FeatureVector (fv, fv.getAlphabet(), null, null));
return carrier;
}
// Serialization
private static final long serialVersionUID = 1;
private static final int CURRENT_SERIAL_VERSION = 0;
private void writeObject (ObjectOutputStream out) throws IOException {
out.writeInt (CURRENT_SERIAL_VERSION);
}
private void readObject (ObjectInputStream in) throws IOException, ClassNotFoundException {
int version = in.readInt ();
}
}