FileTreeFactory.java

package edu.washington.cs.oneswarm.ui.gwt.server;

import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import edu.washington.cs.oneswarm.ui.gwt.rpc.FileTree;

public class FileTreeFactory {
    public static void main(String[] args) {
        FileTree tree;
        try {
            tree = createFileTree(new File("/Volumes/im"));
            tree.print(0);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    public static FileTree createFileTree(File root) throws IOException {
        FileTree tree = new FileTree();

        if (root.isDirectory()) {
            File[] files = root.listFiles(new FilenameFilter() {
                public boolean accept(File dir, String name) {
                    return name.startsWith(".") == false && !ignored(name); // no
                                                                            // need
                                                                            // to
                                                                            // view
                                                                            // hidden
                                                                            // files
                }
            });
            if (files == null)
                return null;
            List<FileTree> children = new ArrayList<FileTree>(files.length);
            for (int i = 0; i < files.length; i++) {
                FileTree c = createFileTree(files[i]);
                if (c != null) // we might not have perms everywhere...
                    children.add(c);
            }
            tree.setChildren(children.toArray(new FileTree[0]));
        }
        tree.setName(root.getName());
        tree.setFullpath(root.getCanonicalPath());
        return tree;
    }

    public static boolean ignored(String name) {
        return name.equals("Desktop DF") || name.equals("Desktop DB") || name.equals("thumbs.db")
                || name.equals("desktop.ini");
    }

}