Mercurial > jdk8-mips64-public > corba / file comparison
comparison: src/share/classes/sun/rmi/rmic/iiop/ClassPathLoader.java
src/share/classes/sun/rmi/rmic/iiop/ClassPathLoader.java
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| 1 /* | |
| 2 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. Oracle designates this | |
| 8 * particular file as subject to the "Classpath" exception as provided | |
| 9 * by Oracle in the LICENSE file that accompanied this code. | |
| 10 * | |
| 11 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 * accompanied this code). | |
| 16 * | |
| 17 * You should have received a copy of the GNU General Public License version | |
| 18 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 * | |
| 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 * or visit www.oracle.com if you need additional information or have any | |
| 23 * questions. | |
| 24 */ | |
| 25 package sun.rmi.rmic.iiop; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import sun.tools.java.ClassPath ; | |
| 29 import sun.tools.java.ClassFile ; | |
| 30 | |
| 31 /** | |
| 32 * A ClassLoader that will ultimately use a given sun.tools.java.ClassPath to | |
| 33 * find the desired file. This works for any JAR files specified in the given | |
| 34 * ClassPath as well -- reusing all of that wonderful sun.tools.java code. | |
| 35 * | |
| 36 *@author Everett Anderson | |
| 37 */ | |
| 38 public class ClassPathLoader extends ClassLoader | |
| 39 { | |
| 40 private ClassPath classPath; | |
| 41 | |
| 42 public ClassPathLoader(ClassPath classPath) { | |
| 43 this.classPath = classPath; | |
| 44 } | |
| 45 | |
| 46 // Called by the super class | |
| 47 protected Class findClass(String name) throws ClassNotFoundException | |
| 48 { | |
| 49 byte[] b = loadClassData(name); | |
| 50 return defineClass(name, b, 0, b.length); | |
| 51 } | |
| 52 | |
| 53 /** | |
| 54 * Load the class with the given fully qualified name from the ClassPath. | |
| 55 */ | |
| 56 private byte[] loadClassData(String className) | |
| 57 throws ClassNotFoundException | |
| 58 { | |
| 59 // Build the file name and subdirectory from the | |
| 60 // class name | |
| 61 String filename = className.replace('.', File.separatorChar) | |
| 62 + ".class"; | |
| 63 | |
| 64 // Have ClassPath find the file for us, and wrap it in a | |
| 65 // ClassFile. Note: This is where it looks inside jar files that | |
| 66 // are specified in the path. | |
| 67 ClassFile classFile = classPath.getFile(filename); | |
| 68 | |
| 69 if (classFile != null) { | |
| 70 | |
| 71 // Provide the most specific reason for failure in addition | |
| 72 // to ClassNotFound | |
| 73 Exception reportedError = null; | |
| 74 byte data[] = null; | |
| 75 | |
| 76 try { | |
| 77 // ClassFile is beautiful because it shields us from | |
| 78 // knowing if it's a separate file or an entry in a | |
| 79 // jar file. | |
| 80 DataInputStream input | |
| 81 = new DataInputStream(classFile.getInputStream()); | |
| 82 | |
| 83 // Can't rely on input available() since it will be | |
| 84 // something unusual if it's a jar file! May need | |
| 85 // to worry about a possible problem if someone | |
| 86 // makes a jar file entry with a size greater than | |
| 87 // max int. | |
| 88 data = new byte[(int)classFile.length()]; | |
| 89 | |
| 90 try { | |
| 91 input.readFully(data); | |
| 92 } catch (IOException ex) { | |
| 93 // Something actually went wrong reading the file. This | |
| 94 // is a real error so save it to report it. | |
| 95 data = null; | |
| 96 reportedError = ex; | |
| 97 } finally { | |
| 98 // Just don't care if there's an exception on close! | |
| 99 // I hate that close can throw an IOException! | |
| 100 try { input.close(); } catch (IOException ex) {} | |
| 101 } | |
| 102 } catch (IOException ex) { | |
| 103 // Couldn't get the input stream for the file. This is | |
| 104 // probably also a real error. | |
| 105 reportedError = ex; | |
| 106 } | |
| 107 | |
| 108 if (data == null) | |
| 109 throw new ClassNotFoundException(className, reportedError); | |
| 110 | |
| 111 return data; | |
| 112 } | |
| 113 | |
| 114 // Couldn't find the file in the class path. | |
| 115 throw new ClassNotFoundException(className); | |
| 116 } | |
| 117 } |
