Get a List of Files, and Check If Any Files Are Missing

package com.darwinsys;
 
/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */
 
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
 
/**
 * Get a list of files, and check if any files are missing.
 * 
 * @author Ian F. Darwin, http://www.darwinsys.com/
 * @version $Id: CheckFiles.java,v 1.3 2004/02/09 03:33:46 ian Exp $
 */
public class CheckFiles {
    public static void main(String[] argv) {
	CheckFiles cf = new CheckFiles();
	System.out.println("CheckFiles starting.");
	cf.getListFromFile();
	cf.getListFromDirectory();
	cf.reportMissingFiles();
	System.out.println("CheckFiles done.");
    }
 
    public String FILENAME = "filelist.txt";
 
    protected ArrayList listFromFile;
 
    protected ArrayList listFromDir = new ArrayList();
 
    protected void getListFromFile() {
	listFromFile = new ArrayList();
	BufferedReader is;
	try {
	    is = new BufferedReader(new FileReader(FILENAME));
	    String line;
	    while ((line = is.readLine()) != null)
		listFromFile.add(line);
	} catch (FileNotFoundException e) {
	    System.err.println("Can't open file list file.");
	    return;
	} catch (IOException e) {
	    System.err.println("Error reading file list");
	    return;
	}
    }
 
    /** Get list of names from the directory */
    protected void getListFromDirectory() {
	listFromDir = new ArrayList();
	String[] l = new java.io.File(".").list();
	for (int i = 0; i < l.length; i++)
	    listFromDir.add(l[i]);
    }
 
    protected void reportMissingFiles() {
	for (int i = 0; i < listFromFile.size(); i++)
	    if (!listFromDir.contains(listFromFile.get(i)))
		System.err.println("File " + listFromFile.get(i) + " missing.");
    }
}