Recursively Listing All Files Below A Directory

// description of your code here
Simple iterator to iterate over all non-directory files the lie below a given directory. Demonstrates a use case for the FlatteningIterator snippet. 



package playground.library.files;

import java.io.File;
import java.io.FileFilter;
import java.util.Arrays;
import java.util.Iterator;
import playground.library.functional.iterator.FlatteningIterator;

/**
 * Iterates over all non-directory files contained in some subdirectory of the 
 * current one.
 *
 * @author david
 */
public class RecursiveFileListIterator implements Iterator
{
    private final FlatteningIterator flatteningIterator;
    
    public void remove() { } 
    
    public RecursiveFileListIterator(File file, FileFilter filter){
        this.flatteningIterator = new FlatteningIterator(new FileIterator(file, filter)); }
    
    public RecursiveFileListIterator(File file){
        this(file, null);}
    
    
    public boolean hasNext(){ 
        return flatteningIterator.hasNext();}
    
    public File next(){ 
        return (File)flatteningIterator.next();}
    
    
    /**
     * Iterator to iterate over all the files contained in a directory. It returns
     * a File object for non directories or a new FileIterator obejct for directories.
     */
    private static class FileIterator implements Iterator