001/*
002 * (C) Copyright 2006-2010 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 */
019package org.nuxeo.connect.update.standalone;
020
021import java.io.File;
022import java.io.FileInputStream;
023import java.io.IOException;
024import java.io.InputStream;
025import java.net.MalformedURLException;
026import java.net.URL;
027
028import org.nuxeo.connect.update.LocalPackage;
029import org.nuxeo.connect.update.PackageData;
030import org.nuxeo.connect.update.PackageException;
031import org.nuxeo.runtime.api.SharedResourceLoader;
032
033/**
034 * @author <a href="mailto:[email protected]">Bogdan Stefanescu</a>
035 */
036public class LocalPackageData implements PackageData {
037
038    protected File root;
039
040    // SharedResourceLoader is a URLClassLoader with a public addURL
041    protected SharedResourceLoader loader;
042
043    public LocalPackageData(ClassLoader parent, File file) throws IOException {
044        this.root = file.getCanonicalFile();
045        if (parent == null) {
046            parent = Thread.currentThread().getContextClassLoader();
047            if (parent == null) {
048                parent = getClass().getClassLoader();
049            }
050        }
051        try {
052            this.loader = new SharedResourceLoader(new URL[] {}, parent);
053            loader.addURL(root.toURI().toURL());
054        } catch (MalformedURLException e) {
055            throw new RuntimeException("Failed to create package class loader. Invalid package root: " + root, e);
056        }
057    }
058
059    public void setRoot(File file) {
060        this.root = file;
061    }
062
063    public ClassLoader getLoader() {
064        return loader;
065    }
066
067    public File getEntry(String path) {
068        return new File(root, path);
069    }
070
071    public InputStream getEntryAsStream(String path) throws IOException {
072        return new FileInputStream(getEntry(path));
073    }
074
075    public File getManifest() {
076        return getEntry(LocalPackage.MANIFEST);
077    }
078
079    public File getRoot() {
080        return root;
081    }
082
083    public Class<?> loadClass(String name) throws PackageException {
084        try {
085            return loader.loadClass(name);
086        } catch (ClassNotFoundException e) {
087            throw new PackageException("Failed to load class " + name + " from package: " + root.getName());
088        }
089    }
090
091}