/*
 * 
 * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * The contents of this file are subject to the Sun Community Source
 * License v3.0/Jini Technology Specific Attachment v 1.0 (the
 * "License"). You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 * http://wwws.sun.com/software/jini/licensing/SCSL3_JiniTSA1.html.
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * The Reference Code is Jini Technology Core Platform code, v2.0. The
 * Developer of the Reference Code is Sun Microsystems, Inc.
 * 
 * Contributor(s): Sun Microsystems, Inc.
 * 
 * The contents of this file comply with the Jini Technology Core
 * Platform Compatibility Kit, v2.0A.
 * 
 * Tester(s): Sun Microsystems, Inc.
 * 
 * Test Platform(s):
 * Java 2 SDK, Standard Edition, Version 1.4.2_03 for Solaris(TM)SPARC/x86
 * Java 2 SDK, Standard Edition, Version 1.4.2_03 for Linux (Intel x86)
 * Java 2 SDK, Standard Edition, Version 1.4.2_03 for Windows (Intel Platform)
 * 
 */
package com.sun.jini.system;

import java.lang.String;

import java.io.File;

import java.util.Observable;

/**
 * Class to recursively traverse a given directory. Each time
 * a file is found the Observer object added to this one will
 * be called.
 *
 * @author Sun Microsystems, Inc.
 *
 */
public class FileWalker extends Observable {

    /**
     * Method to call that starts the directory traversal.
     * Make sure that a FileObserver has been added prior
     * to invoking this method.
     * 
     * @param file  The top of the directory to traverse.
     * @param includeDirectories   If true it will recursively
     *                             traverse the given directory.
     *                             If false, just do the files 
     *                             currently found in the given
     *                             directory.
     * 
     * @see java.util.Observable
     * @see java.util.Observer
     * @see com.sun.jini.system.FileObserver
     */
    public void walk (File file, boolean includeDirectories) {
	if (file.isDirectory()) {
	    if (includeDirectories) {
		setChanged();
		notifyObservers(file);
	    }
	    String[] filenames = file.list();
	    if (filenames != null) {
		for (int i=0; i<filenames.length; i++) {
		    walk(new File(file,filenames[i]),includeDirectories);
		}
	    }
	} else {
	    setChanged();
	    notifyObservers(file);
	}
    }
}



