// -----------------------------------------------------------------------------
// DeleteDirectory.java
// -----------------------------------------------------------------------------

/*
 * =============================================================================
 * Copyright (c) 1998-2008 Jeffrey M. Hunter. All rights reserved.
 * 
 * All source code and material located at the Internet address of
 * http://www.idevelopment.info is the copyright of Jeffrey M. Hunter and
 * is protected under copyright laws of the United States. This source code may
 * not be hosted on any other site without my express, prior, written
 * permission. Application to host any of the material elsewhere can be made by
 * contacting me at jhunter@idevelopment.info.
 *
 * I have made every effort and taken great care in making sure that the source
 * code and other content included on my web site is technically accurate, but I
 * disclaim any and all responsibility for any loss, damage or destruction of
 * data or any other property which may arise from relying on it. I will in no
 * case be liable for any monetary damages arising from such loss, damage or
 * destruction.
 * 
 * As with any code, ensure to test this code in a development environment 
 * before attempting to run it in production.
 * =============================================================================
 */
 
import java.io.File;

/**
 * -----------------------------------------------------------------------------
 * This program demonstrates how to delete a directory. The first method
 * assumes the directory is empty. If the directory is not empty, it is 
 * necessary to first recursively delete all files and subdirectories in
 * the directory. This example will provide a demonstration for both methods.
 * 
 * @version 1.0
 * @author  Jeffrey M. Hunter  (jhunter@idevelopment.info)
 * @author  http://www.idevelopment.info
 * -----------------------------------------------------------------------------
 */

public class DeleteDirectory {


    /**
     * Deletes the directory passed in.
     * @param dir Directory to be deleted
     */
    private static void doDeleteEmptyDir(String dir) {

        boolean success = (new File(dir)).delete();

        if (success) {
            System.out.println("Successfully deleted empty directory: " + dir);
        } else {
            System.out.println("Failed to delete empty directory: " + dir);
        }

    }

    /**
     * Deletes all files and subdirectories under "dir".
     * @param dir Directory to be deleted
     * @return boolean Returns "true" if all deletions were successful.
     *                 If a deletion fails, the method stops attempting to 
     *                 delete and returns "false".
     */
    private static boolean deleteDir(File dir) {

        if (dir.isDirectory()) {
            String[] children = dir.list();
            for (int i=0; i<children.length; i++) {
                boolean success = deleteDir(new File(dir, children[i]));
                if (!success) {
                    return false;
                }
            }
        }

        // The directory is now empty so now it can be smoked
        return dir.delete();
    }



    /**
     * Sole entry point to the class and application.
     * @param args Array of String arguments.
     */
    public static void main(String[] args) {

        doDeleteEmptyDir("new_dir1");
        
        String newDir2 = "new_dir2";
        boolean success = deleteDir(new File(newDir2));
        if (success) {
            System.out.println("Successfully deleted populated directory: " + newDir2);
        } else {
            System.out.println("Failed to delete populated directory: " + newDir2);
        }
        
    }

}