/* 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. */
/**
Tests membership of the token text in the provided list of words.
The lexicon words are provided in a file, one word per line.
@author Andrew McCallum <a href="mailto:mccallum@cs.umass.edu">mccallum@cs.umass.edu</a>
*/
package cc.mallet.pipe.tsf;
import java.io.*;
import cc.mallet.pipe.*;
import cc.mallet.types.*;
public class LexiconMembership extends Pipe implements Serializable
{
String name;
gnu.trove.THashSet lexicon;
boolean ignoreCase;
public LexiconMembership (String name, Reader lexiconReader, boolean ignoreCase)
{
this.name = name;
this.lexicon = new gnu.trove.THashSet ();
this.ignoreCase = ignoreCase;
LineNumberReader reader = new LineNumberReader (lexiconReader);
String line;
while (true) {
try {
line = reader.readLine();
} catch (IOException e) {
throw new IllegalStateException ();
}
if (line == null) {
break;
} else {
// System.out.println(name + " : " + (ignoreCase ? line.toLowerCase().intern() : line.intern()) );
lexicon.add (ignoreCase ? line.toLowerCase() : line);
}
}
if (lexicon.size() == 0)
throw new IllegalArgumentException ("Empty lexicon");
}
public LexiconMembership (String name, File lexiconFile, boolean ignoreCase) throws FileNotFoundException
{
this (name, new BufferedReader (new FileReader (lexiconFile)), ignoreCase);
}
public LexiconMembership (File lexiconFile, boolean ignoreCase) throws FileNotFoundException
{
this (lexiconFile.getName(), lexiconFile, ignoreCase);
}
public LexiconMembership (File lexiconFile) throws FileNotFoundException
{
this (lexiconFile.getName(), lexiconFile, true);
}
public Instance pipe (Instance carrier)
{
TokenSequence ts = (TokenSequence) carrier.getData();
for (int i = 0; i < ts.size(); i++) {
Token t = ts.get(i);
String s = t.getText();
String conS=s;
//dealing with ([a-z]+), ([a-z]+, [a-z]+), [a-z]+.
if(conS.startsWith("("))
conS = conS.substring(1);
if(conS.endsWith(")") || conS.endsWith("."))
conS = conS.substring(0, conS.length()-1);
if (lexicon.contains (ignoreCase ? s.toLowerCase() : s))
t.setFeatureValue (name, 1.0);
if(conS.compareTo(s) != 0) {
if (lexicon.contains (ignoreCase ? conS.toLowerCase() : conS))
t.setFeatureValue (name, 1.0);
}
}
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);
out.writeObject (name);
out.writeObject (lexicon);
out.writeBoolean (ignoreCase);
}
private void readObject (ObjectInputStream in) throws IOException, ClassNotFoundException {
int version = in.readInt ();
this.name = (String) in.readObject();
this.lexicon = (gnu.trove.THashSet) in.readObject();
this.ignoreCase = in.readBoolean();
}
}