org.nuxeo.ecm.webengine.model.impl.DirectoryStack.java Source code

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Here is the source code for org.nuxeo.ecm.webengine.model.impl.DirectoryStack.java

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/*
 * (C) Copyright 2006-2008 Nuxeo SAS (http://nuxeo.com/) and contributors.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public License
 * (LGPL) version 2.1 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * Contributors:
 *     bstefanescu
 *
 * $Id$
 */

package org.nuxeo.ecm.webengine.model.impl;

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
 *
 */
public class DirectoryStack {

    private static final Log log = LogFactory.getLog(DirectoryStack.class);

    protected final List<File> dirs;

    public DirectoryStack() {
        dirs = new ArrayList<File>();
    }

    public DirectoryStack(List<File> entries) {
        this();
        dirs.addAll(entries);
    }

    public List<File> getDirectories() {
        return dirs;
    }

    public boolean isEmpty() {
        return dirs.isEmpty();
    }

    public void addDirectory(File dir) throws IOException {
        dirs.add(dir.getCanonicalFile());
    }

    /**
     * Gets the file given its name in this virtual directory.
     * <p>
     * The canonical file is returned if any file is found
     *
     * @param name the file name to lookup
     * @return the file in the canonical form
     *
     * @throws IOException
     */
    public File getFile(String name) throws IOException {
        for (File entry : dirs) {
            File file = new File(entry, name);
            if (file.exists()) {
                return file.getCanonicalFile();
            }
        }
        return null;
    }

    public File[] listFiles() {
        List<File> result = new ArrayList<File>();
        for (File entry : dirs) {
            File[] files = entry.listFiles();
            result.addAll(Arrays.asList(files));
        }
        return result.toArray(new File[result.size()]);
    }

    public File[] listFiles(FileFilter filter) {
        List<File> result = new ArrayList<File>();
        for (File entry : dirs) {
            File[] files = entry.listFiles(filter);
            result.addAll(Arrays.asList(files));
        }
        return result.toArray(new File[result.size()]);
    }

    public static void main(String[] args) {
        try {
            DirectoryStack vd = new DirectoryStack();
            vd.addDirectory(new File("/home/bstefanescu/Desktop"));
            vd.addDirectory(new File("/home/bstefanescu/src"));

            for (File file : vd.listFiles()) {
                System.out.println("> " + file);
            }
            System.out.println("dummy: " + vd.getFile("dummy"));
            System.out.println("dev: " + vd.getFile("dev"));
        } catch (IOException e) {
            log.error(e, e);
        }
    }

}