/* * Copyright 2010-2013 Institut Pasteur. * * This file is part of Icy. * * Icy is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Icy 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Icy. If not, see <http://www.gnu.org/licenses/>. */ package icy.util; import icy.network.NetworkUtil; import icy.network.URLUtil; import java.io.IOException; import java.net.JarURLConnection; import java.net.URL; import java.util.jar.JarEntry; import java.util.jar.JarFile; /** * JAR utilities class * * @author Stephane */ public class JarUtil { public static final String FILE_EXTENSION = "jar"; public static final String FILE_DOT_EXTENSION = "." + FILE_EXTENSION; /** * Return true if specified URL is a JAR url */ public static boolean isJarURL(String path) { return (path != null) && path.toUpperCase().startsWith("JAR:") && URLUtil.isURL(path.substring(4)); } /** * Return a JAR URL from the specified path */ public static URL getJarURL(String path) { if (path == null) return null; if (path.toUpperCase().startsWith("JAR:")) return URLUtil.getURL(path.substring(4)); return URLUtil.getURL("jar:" + URLUtil.getURL(path) + "!/"); } /** * Return a JAR URL from the specified JAR path and JAR entry */ public static URL getJarURL(String jarPath, JarEntry entry) { return URLUtil.getURL(getJarURL(jarPath) + entry.getName()); } /** * Return a JAR File from the specified path */ public static JarFile getJarFile(String path) { try { if (isJarURL(path)) return ((JarURLConnection) NetworkUtil.openConnection(getJarURL(path), false, true)).getJarFile(); return new JarFile(path); } catch (IOException e) { return null; } } /** * Find a class entry in the specified JAR file */ public static JarEntry getJarClassEntry(JarFile file, String className) { return file.getJarEntry(className.replace('.', '/') + ".class"); } /** * Find the specified entry in the specified JAR file */ public static JarEntry getJarEntry(JarFile file, String entryName) { return file.getJarEntry(entryName); } }