Util.java Source code

Introduction

Here is the source code for Util.java

Source

/* Copyright (C) 2003 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.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;

/**
 * 
 * 
 * @author <a href="mailto:casutton@cs.umass.edu">Charles Sutton</a>
 * @version $Id: ArrayUtils.java,v 1.1 2007/10/22 21:37:40 mccallum Exp $
 */
public class Util {

    /**
     * Creates a file, making sure that its name is unique.
    *  The file will be created as if by <tt>new File(dir, prefix+i+extension)</tt>,
    *  where i is an integer chosen such that the returned File does not exist.
    * @param dir Directory to use for the returned file
    * @param prefix Prefix of the file name (before the uniquifying integer)
    * @param extension Suffix of the file name (after the uniquifying integer)
     */
    public static File uniqueFile(File dir, String prefix, String extension) throws IOException {
        File f = null;
        int i = 0;
        boolean wasCreated = false;
        while (!wasCreated) {
            if (dir != null) {
                f = new File(dir, prefix + i + extension);
            } else {
                f = new File(prefix + i + extension);
            }
            wasCreated = f.createNewFile();
            i++;
        }
        return f;
    }

}