| /* |
| * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package sun.rmi.rmic.iiop; |
| |
| import java.io.*; |
| import sun.tools.java.ClassPath ; |
| import sun.tools.java.ClassFile ; |
| |
| /** |
| * A ClassLoader that will ultimately use a given sun.tools.java.ClassPath to |
| * find the desired file. This works for any JAR files specified in the given |
| * ClassPath as well -- reusing all of that wonderful sun.tools.java code. |
| * |
| *@author Everett Anderson |
| */ |
| public class ClassPathLoader extends ClassLoader |
| { |
| private ClassPath classPath; |
| |
| public ClassPathLoader(ClassPath classPath) { |
| this.classPath = classPath; |
| } |
| |
| // Called by the super class |
| protected Class findClass(String name) throws ClassNotFoundException |
| { |
| byte[] b = loadClassData(name); |
| return defineClass(name, b, 0, b.length); |
| } |
| |
| /** |
| * Load the class with the given fully qualified name from the ClassPath. |
| */ |
| private byte[] loadClassData(String className) |
| throws ClassNotFoundException |
| { |
| // Build the file name and subdirectory from the |
| // class name |
| String filename = className.replace('.', File.separatorChar) |
| + ".class"; |
| |
| // Have ClassPath find the file for us, and wrap it in a |
| // ClassFile. Note: This is where it looks inside jar files that |
| // are specified in the path. |
| ClassFile classFile = classPath.getFile(filename); |
| |
| if (classFile != null) { |
| |
| // Provide the most specific reason for failure in addition |
| // to ClassNotFound |
| Exception reportedError = null; |
| byte data[] = null; |
| |
| try { |
| // ClassFile is beautiful because it shields us from |
| // knowing if it's a separate file or an entry in a |
| // jar file. |
| DataInputStream input |
| = new DataInputStream(classFile.getInputStream()); |
| |
| // Can't rely on input available() since it will be |
| // something unusual if it's a jar file! May need |
| // to worry about a possible problem if someone |
| // makes a jar file entry with a size greater than |
| // max int. |
| data = new byte[(int)classFile.length()]; |
| |
| try { |
| input.readFully(data); |
| } catch (IOException ex) { |
| // Something actually went wrong reading the file. This |
| // is a real error so save it to report it. |
| data = null; |
| reportedError = ex; |
| } finally { |
| // Just don't care if there's an exception on close! |
| // I hate that close can throw an IOException! |
| try { input.close(); } catch (IOException ex) {} |
| } |
| } catch (IOException ex) { |
| // Couldn't get the input stream for the file. This is |
| // probably also a real error. |
| reportedError = ex; |
| } |
| |
| if (data == null) |
| throw new ClassNotFoundException(className, reportedError); |
| |
| return data; |
| } |
| |
| // Couldn't find the file in the class path. |
| throw new ClassNotFoundException(className); |
| } |
| } |