Utils.java Source code

Introduction

Here is the source code for Utils.java

Source

import java.io.File;
import java.io.IOException;

public class Utils {
    /**
     * delete all files under this file and including this file
     * 
     * @param f
     * @throws IOException
     */
    public static void deleteAll(File f) throws IOException {
        recurse(f, new RecurseAction() {
            public void doFile(File file) throws IOException {
                file.delete();
                if (file.exists()) {
                    throw new IOException("Failed to delete  " + file.getPath());
                }
            }

            public void doBeforeFile(File f) {
            }

            public void doAfterFile(File f) {
            }
        });
    }

    public static void recurse(File f, RecurseAction action) throws IOException {
        action.doBeforeFile(f);
        if (f.isDirectory()) {
            File[] files = f.listFiles();
            if (files != null) {
                for (int i = 0; i < files.length; i++) {
                    if (files[i].isDirectory()) {
                        recurse(files[i], action);
                    } else {
                        action.doFile(files[i]);
                    }
                }
            }
        }
        action.doFile(f);
    }
}

interface RecurseAction {

    /**
     * @param file
     * @throws IOException
     */
    void doFile(File file) throws IOException;

    /**
     * @param f
     */
    void doBeforeFile(File f);

    /**
     * @param f
     */
    void doAfterFile(File f);

}