/* 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. */
package cc.mallet.pipe;
import java.io.*;
import cc.mallet.types.Instance;
import cc.mallet.types.Token;
import cc.mallet.types.TokenSequence;
import cc.mallet.util.CharSequenceLexer;
import cc.mallet.util.Lexer;
/**
* Read from File or BufferedRead in the data field and produce a TokenSequence.
@author Andrew McCallum <a href="mailto:mccallum@cs.umass.edu">mccallum@cs.umass.edu</a>
*/
public class SourceLocation2TokenSequence extends Pipe implements Serializable
{
CharSequenceLexer lexer;
public SourceLocation2TokenSequence (CharSequenceLexer lexer)
{
this.lexer = lexer;
}
public Instance pipe (Instance carrier)
{
try {
if (carrier.getData() instanceof File)
carrier.setData(pipe ((File)carrier.getData()));
else if (carrier.getData() instanceof BufferedReader)
carrier.setData(pipe ((BufferedReader)carrier.getData()));
else
throw new IllegalArgumentException ("Doesn't handle class "+carrier.getClass());
} catch (IOException e) {
throw new IllegalArgumentException ("IOException");
}
return carrier;
}
public TokenSequence pipe (File file)
throws java.io.FileNotFoundException, java.io.IOException
{
return pipe (new BufferedReader (new FileReader (file)));
}
public TokenSequence pipe (BufferedReader br)
throws java.io.IOException
{
final int BUFSIZE = 2048;
char[] buf = new char[BUFSIZE];
int count;
StringBuffer sb = new StringBuffer (BUFSIZE);
do {
count = br.read (buf, 0, BUFSIZE);
sb.append (buf);
} while (count == BUFSIZE);
lexer.setCharSequence ((CharSequence)sb);
TokenSequence ts = new TokenSequence ();
while (lexer.hasNext())
ts.add (new Token ((String) lexer.next()));
return ts;
}
// 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 ();
}
}