/* 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.util.CharSequenceLexer;
/**
* Given a filename contained in a string, read in contents of file into a CharSequence.
@author Andrew McCallum <a href="mailto:mccallum@cs.umass.edu">mccallum@cs.umass.edu</a>
*/
public class Filename2CharSequence extends Pipe implements Serializable
{
public Filename2CharSequence ()
{
}
public Instance pipe (Instance carrier)
{
String filename = (String)carrier.getData();
try {
carrier.setData(pipe (new BufferedReader (new FileReader (filename))));
} catch (java.io.IOException e) {
throw new IllegalArgumentException ("IOException");
}
return carrier;
}
public CharSequence pipe (Reader reader)
throws java.io.IOException
{
final int BUFSIZE = 2048;
char[] buf = new char[BUFSIZE];
int count;
StringBuffer sb = new StringBuffer (BUFSIZE);
do {
count = reader.read (buf, 0, BUFSIZE);
if (count == -1)
break;
//System.out.println ("count="+count);
sb.append (buf, 0, count);
} while (count == BUFSIZE);
return sb;
}
// 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 ();
}
}