Thu, 31 Aug 2017 18:10:36 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | /* |
aoqi@0 | 27 | * Licensed Materials - Property of IBM |
aoqi@0 | 28 | * RMI-IIOP v1.0 |
aoqi@0 | 29 | * Copyright IBM Corp. 1998 1999 All Rights Reserved |
aoqi@0 | 30 | * |
aoqi@0 | 31 | */ |
aoqi@0 | 32 | |
aoqi@0 | 33 | package sun.rmi.rmic.iiop; |
aoqi@0 | 34 | |
aoqi@0 | 35 | import java.util.Hashtable; |
aoqi@0 | 36 | import java.io.File; |
aoqi@0 | 37 | import java.io.FileInputStream; |
aoqi@0 | 38 | |
aoqi@0 | 39 | /** |
aoqi@0 | 40 | * DirectoryLoader is a simple ClassLoader which loads from a specified |
aoqi@0 | 41 | * file system directory. |
aoqi@0 | 42 | * @author Bryan Atsatt |
aoqi@0 | 43 | */ |
aoqi@0 | 44 | |
aoqi@0 | 45 | public class DirectoryLoader extends ClassLoader { |
aoqi@0 | 46 | |
aoqi@0 | 47 | private Hashtable cache; |
aoqi@0 | 48 | private File root; |
aoqi@0 | 49 | |
aoqi@0 | 50 | /** |
aoqi@0 | 51 | * Constructor. |
aoqi@0 | 52 | */ |
aoqi@0 | 53 | public DirectoryLoader (File rootDir) { |
aoqi@0 | 54 | cache = new Hashtable(); |
aoqi@0 | 55 | if (rootDir == null || !rootDir.isDirectory()) { |
aoqi@0 | 56 | throw new IllegalArgumentException(); |
aoqi@0 | 57 | } |
aoqi@0 | 58 | root = rootDir; |
aoqi@0 | 59 | } |
aoqi@0 | 60 | |
aoqi@0 | 61 | private DirectoryLoader () {} |
aoqi@0 | 62 | |
aoqi@0 | 63 | /** |
aoqi@0 | 64 | * Convenience version of loadClass which sets 'resolve' == true. |
aoqi@0 | 65 | */ |
aoqi@0 | 66 | public Class loadClass(String className) throws ClassNotFoundException { |
aoqi@0 | 67 | return loadClass(className, true); |
aoqi@0 | 68 | } |
aoqi@0 | 69 | |
aoqi@0 | 70 | /** |
aoqi@0 | 71 | * This is the required version of loadClass which is called |
aoqi@0 | 72 | * both from loadClass above and from the internal function |
aoqi@0 | 73 | * FindClassFromClass. |
aoqi@0 | 74 | */ |
aoqi@0 | 75 | public synchronized Class loadClass(String className, boolean resolve) |
aoqi@0 | 76 | throws ClassNotFoundException { |
aoqi@0 | 77 | Class result; |
aoqi@0 | 78 | byte classData[]; |
aoqi@0 | 79 | |
aoqi@0 | 80 | // Do we already have it in the cache? |
aoqi@0 | 81 | |
aoqi@0 | 82 | result = (Class) cache.get(className); |
aoqi@0 | 83 | |
aoqi@0 | 84 | if (result == null) { |
aoqi@0 | 85 | |
aoqi@0 | 86 | // Nope, can we get if from the system class loader? |
aoqi@0 | 87 | |
aoqi@0 | 88 | try { |
aoqi@0 | 89 | |
aoqi@0 | 90 | result = super.findSystemClass(className); |
aoqi@0 | 91 | |
aoqi@0 | 92 | } catch (ClassNotFoundException e) { |
aoqi@0 | 93 | |
aoqi@0 | 94 | // No, so try loading it... |
aoqi@0 | 95 | |
aoqi@0 | 96 | classData = getClassFileData(className); |
aoqi@0 | 97 | |
aoqi@0 | 98 | if (classData == null) { |
aoqi@0 | 99 | throw new ClassNotFoundException(); |
aoqi@0 | 100 | } |
aoqi@0 | 101 | |
aoqi@0 | 102 | // Parse the class file data... |
aoqi@0 | 103 | |
aoqi@0 | 104 | result = defineClass(classData, 0, classData.length); |
aoqi@0 | 105 | |
aoqi@0 | 106 | if (result == null) { |
aoqi@0 | 107 | throw new ClassFormatError(); |
aoqi@0 | 108 | } |
aoqi@0 | 109 | |
aoqi@0 | 110 | // Resolve it... |
aoqi@0 | 111 | |
aoqi@0 | 112 | if (resolve) resolveClass(result); |
aoqi@0 | 113 | |
aoqi@0 | 114 | // Add to cache... |
aoqi@0 | 115 | |
aoqi@0 | 116 | cache.put(className, result); |
aoqi@0 | 117 | } |
aoqi@0 | 118 | } |
aoqi@0 | 119 | |
aoqi@0 | 120 | return result; |
aoqi@0 | 121 | } |
aoqi@0 | 122 | |
aoqi@0 | 123 | /** |
aoqi@0 | 124 | * Reurn a byte array containing the contents of the class file. Returns null |
aoqi@0 | 125 | * if an exception occurs. |
aoqi@0 | 126 | */ |
aoqi@0 | 127 | private byte[] getClassFileData (String className) { |
aoqi@0 | 128 | |
aoqi@0 | 129 | byte result[] = null; |
aoqi@0 | 130 | FileInputStream stream = null; |
aoqi@0 | 131 | |
aoqi@0 | 132 | // Get the file... |
aoqi@0 | 133 | |
aoqi@0 | 134 | File classFile = new File(root,className.replace('.',File.separatorChar) + ".class"); |
aoqi@0 | 135 | |
aoqi@0 | 136 | // Now get the bits... |
aoqi@0 | 137 | |
aoqi@0 | 138 | try { |
aoqi@0 | 139 | stream = new FileInputStream(classFile); |
aoqi@0 | 140 | result = new byte[stream.available()]; |
aoqi@0 | 141 | stream.read(result); |
aoqi@0 | 142 | } catch(ThreadDeath death) { |
aoqi@0 | 143 | throw death; |
aoqi@0 | 144 | } catch (Throwable e) { |
aoqi@0 | 145 | } |
aoqi@0 | 146 | |
aoqi@0 | 147 | finally { |
aoqi@0 | 148 | if (stream != null) { |
aoqi@0 | 149 | try { |
aoqi@0 | 150 | stream.close(); |
aoqi@0 | 151 | } catch(ThreadDeath death) { |
aoqi@0 | 152 | throw death; |
aoqi@0 | 153 | } catch (Throwable e) { |
aoqi@0 | 154 | } |
aoqi@0 | 155 | } |
aoqi@0 | 156 | } |
aoqi@0 | 157 | |
aoqi@0 | 158 | return result; |
aoqi@0 | 159 | } |
aoqi@0 | 160 | } |