1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/sun/rmi/rmic/iiop/ClassPathLoader.java Wed Apr 27 01:21:28 2016 +0800
1.3 @@ -0,0 +1,117 @@
1.4 +/*
1.5 + * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +package sun.rmi.rmic.iiop;
1.29 +
1.30 +import java.io.*;
1.31 +import sun.tools.java.ClassPath ;
1.32 +import sun.tools.java.ClassFile ;
1.33 +
1.34 +/**
1.35 + * A ClassLoader that will ultimately use a given sun.tools.java.ClassPath to
1.36 + * find the desired file. This works for any JAR files specified in the given
1.37 + * ClassPath as well -- reusing all of that wonderful sun.tools.java code.
1.38 + *
1.39 + *@author Everett Anderson
1.40 + */
1.41 +public class ClassPathLoader extends ClassLoader
1.42 +{
1.43 + private ClassPath classPath;
1.44 +
1.45 + public ClassPathLoader(ClassPath classPath) {
1.46 + this.classPath = classPath;
1.47 + }
1.48 +
1.49 + // Called by the super class
1.50 + protected Class findClass(String name) throws ClassNotFoundException
1.51 + {
1.52 + byte[] b = loadClassData(name);
1.53 + return defineClass(name, b, 0, b.length);
1.54 + }
1.55 +
1.56 + /**
1.57 + * Load the class with the given fully qualified name from the ClassPath.
1.58 + */
1.59 + private byte[] loadClassData(String className)
1.60 + throws ClassNotFoundException
1.61 + {
1.62 + // Build the file name and subdirectory from the
1.63 + // class name
1.64 + String filename = className.replace('.', File.separatorChar)
1.65 + + ".class";
1.66 +
1.67 + // Have ClassPath find the file for us, and wrap it in a
1.68 + // ClassFile. Note: This is where it looks inside jar files that
1.69 + // are specified in the path.
1.70 + ClassFile classFile = classPath.getFile(filename);
1.71 +
1.72 + if (classFile != null) {
1.73 +
1.74 + // Provide the most specific reason for failure in addition
1.75 + // to ClassNotFound
1.76 + Exception reportedError = null;
1.77 + byte data[] = null;
1.78 +
1.79 + try {
1.80 + // ClassFile is beautiful because it shields us from
1.81 + // knowing if it's a separate file or an entry in a
1.82 + // jar file.
1.83 + DataInputStream input
1.84 + = new DataInputStream(classFile.getInputStream());
1.85 +
1.86 + // Can't rely on input available() since it will be
1.87 + // something unusual if it's a jar file! May need
1.88 + // to worry about a possible problem if someone
1.89 + // makes a jar file entry with a size greater than
1.90 + // max int.
1.91 + data = new byte[(int)classFile.length()];
1.92 +
1.93 + try {
1.94 + input.readFully(data);
1.95 + } catch (IOException ex) {
1.96 + // Something actually went wrong reading the file. This
1.97 + // is a real error so save it to report it.
1.98 + data = null;
1.99 + reportedError = ex;
1.100 + } finally {
1.101 + // Just don't care if there's an exception on close!
1.102 + // I hate that close can throw an IOException!
1.103 + try { input.close(); } catch (IOException ex) {}
1.104 + }
1.105 + } catch (IOException ex) {
1.106 + // Couldn't get the input stream for the file. This is
1.107 + // probably also a real error.
1.108 + reportedError = ex;
1.109 + }
1.110 +
1.111 + if (data == null)
1.112 + throw new ClassNotFoundException(className, reportedError);
1.113 +
1.114 + return data;
1.115 + }
1.116 +
1.117 + // Couldn't find the file in the class path.
1.118 + throw new ClassNotFoundException(className);
1.119 + }
1.120 +}
