| /* URLLoader.java -- base helper class for URLClassLoader |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.net.loader; |
| |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.net.URLStreamHandlerFactory; |
| import java.security.CodeSource; |
| import java.util.ArrayList; |
| import java.util.jar.Manifest; |
| |
| /** |
| * A <code>URLLoader</code> contains all logic to load resources from a |
| * given base <code>URL</code>. |
| */ |
| public abstract class URLLoader |
| { |
| /** |
| * Our classloader to get info from if needed. |
| */ |
| final URLClassLoader classloader; |
| |
| /** |
| * The base URL from which all resources are loaded. |
| */ |
| final URL baseURL; |
| |
| /** |
| * The stream handler factory. |
| */ |
| final URLStreamHandlerFactory factory; |
| |
| /** |
| * The source for stream handlers. |
| */ |
| final URLStreamHandlerCache cache; |
| |
| /** |
| * A <code>CodeSource</code> without any associated certificates. |
| * It is common for classes to not have certificates associated |
| * with them. If they come from the same <code>URLLoader</code> |
| * then it is safe to share the associated <code>CodeSource</code> |
| * between them since <code>CodeSource</code> is immutable. |
| */ |
| final CodeSource noCertCodeSource; |
| |
| public URLLoader(URLClassLoader classloader, URLStreamHandlerCache cache, |
| URLStreamHandlerFactory factory, |
| URL baseURL) |
| { |
| this(classloader, cache, factory, baseURL, baseURL); |
| } |
| |
| public URLLoader(URLClassLoader classloader, URLStreamHandlerCache cache, |
| URLStreamHandlerFactory factory, |
| URL baseURL, URL overrideURL) |
| { |
| this.classloader = classloader; |
| this.baseURL = baseURL; |
| this.factory = factory; |
| this.cache = cache; |
| this.noCertCodeSource = new CodeSource(overrideURL, null); |
| } |
| |
| /** |
| * Return the base URL of this loader. |
| */ |
| public final URL getBaseURL() |
| { |
| return baseURL; |
| } |
| |
| /** |
| * Returns a <code>Class</code> loaded by this |
| * <code>URLLoader</code>, or <code>null</code> when this loader |
| * either can't load the class or doesn't know how to load classes |
| * at all. Most subclasses do not need to override this; it is only |
| * useful in situations where the subclass has a more direct way of |
| * making <code>Class</code> objects. |
| */ |
| public Class getClass(String className) |
| { |
| return null; |
| } |
| |
| /** |
| * Returns a <code>Resource</code> loaded by this |
| * <code>URLLoader</code>, or <code>null</code> when no |
| * <code>Resource</code> with the given name exists. |
| */ |
| public abstract Resource getResource(String s); |
| |
| /** |
| * Returns the <code>Manifest</code> associated with the |
| * <code>Resource</code>s loaded by this <code>URLLoader</code> or |
| * <code>null</code> there is no such <code>Manifest</code>. |
| */ |
| public Manifest getManifest() |
| { |
| return null; |
| } |
| |
| /** |
| * Return a list of new URLLoader objects representing any |
| * class path entries added by this container. |
| */ |
| public ArrayList getClassPath() |
| { |
| return null; |
| } |
| } |