| /******************************************************************************* |
| * Copyright (c) 2008, 2010 VMware Inc. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * VMware Inc. - initial contribution |
| *******************************************************************************/ |
| |
| package org.eclipse.virgo.kernel.test; |
| |
| import java.io.File; |
| import java.io.FileReader; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| import java.io.StringReader; |
| import java.io.StringWriter; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| |
| import org.eclipse.virgo.util.io.FileCopyUtils; |
| |
| /** |
| * Utility class for extracting a {@link Reader} for manifest data in a JAR file and in exploded JAR directories. |
| * <p/> |
| * |
| * <strong>Concurrent Semantics</strong><br /> |
| * |
| * Threadsafe. |
| * |
| */ |
| public final class ManifestUtils { |
| |
| private static final String MANIFEST_DIRECTORY_LOCATION = "META-INF" + File.separator + "MANIFEST.MF"; |
| |
| private static final String MANIFEST_ENTRY = "META-INF/MANIFEST.MF"; |
| |
| /** |
| * Creates a {@link Reader} for the manifest in the supplied exploded JAR directory. |
| * |
| * @param directory the exploded JAR directory. |
| * @return the <code>Reader</code> or <code>null</code> if the manifest cannot be found. |
| */ |
| public static final Reader manifestReaderFromExplodedDirectory(File directory) { |
| if (directory == null || !directory.isDirectory()) { |
| throw new IllegalArgumentException("Must supply a valid directory"); |
| } |
| try { |
| File manifestFile = new File(directory.getAbsolutePath() + File.separator + MANIFEST_DIRECTORY_LOCATION); |
| if (manifestFile.exists()) { |
| return new FileReader(manifestFile); |
| } else { |
| return null; |
| } |
| } catch (IOException e) { |
| throw new RuntimeException("Unable to read MANIFEST for exploded directory '" + directory.getAbsolutePath() + "'.", e); |
| } |
| } |
| |
| /** |
| * Creates a {@link Reader} for the manifest in the supplied JAR file. |
| * |
| * @param file the JAR file. |
| * @return the <code>Reader</code> or <code>null</code> if the manifest cannot be found. |
| */ |
| public static final Reader manifestReaderFromJar(File file) { |
| JarFile jar = null; |
| try { |
| jar = new JarFile(file); |
| JarEntry entry = jar.getJarEntry(MANIFEST_ENTRY); |
| if (entry != null) { |
| StringWriter writer = new StringWriter(); |
| FileCopyUtils.copy(new InputStreamReader(jar.getInputStream(entry)), writer); |
| jar.close(); |
| return new StringReader(writer.toString()); |
| } else { |
| return null; |
| } |
| } catch (Exception e) { |
| throw new RuntimeException("Cannot read MANIFEST.MF from jar '" + file.getAbsolutePath() + "'.", e); |
| } finally { |
| if (jar != null) { |
| try { |
| jar.close(); |
| } catch (IOException ioe) { |
| throw new RuntimeException("Failed to close jar '" + file.getAbsolutePath() + "'.", ioe); |
| } |
| } |
| } |
| } |
| } |