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1 /* |
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2 * reserved comment block |
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3 * DO NOT REMOVE OR ALTER! |
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4 */ |
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5 package com.sun.org.apache.bcel.internal.util; |
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6 |
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7 /* ==================================================================== |
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8 * The Apache Software License, Version 1.1 |
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9 * |
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10 * Copyright (c) 2001 The Apache Software Foundation. All rights |
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11 * reserved. |
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12 * |
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13 * Redistribution and use in source and binary forms, with or without |
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14 * modification, are permitted provided that the following conditions |
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15 * are met: |
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16 * |
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17 * 1. Redistributions of source code must retain the above copyright |
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18 * notice, this list of conditions and the following disclaimer. |
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19 * |
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20 * 2. Redistributions in binary form must reproduce the above copyright |
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21 * notice, this list of conditions and the following disclaimer in |
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22 * the documentation and/or other materials provided with the |
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23 * distribution. |
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24 * |
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25 * 3. The end-user documentation included with the redistribution, |
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26 * if any, must include the following acknowledgment: |
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27 * "This product includes software developed by the |
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28 * Apache Software Foundation (http://www.apache.org/)." |
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29 * Alternately, this acknowledgment may appear in the software itself, |
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30 * if and wherever such third-party acknowledgments normally appear. |
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31 * |
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32 * 4. The names "Apache" and "Apache Software Foundation" and |
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33 * "Apache BCEL" must not be used to endorse or promote products |
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34 * derived from this software without prior written permission. For |
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35 * written permission, please contact apache@apache.org. |
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36 * |
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37 * 5. Products derived from this software may not be called "Apache", |
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38 * "Apache BCEL", nor may "Apache" appear in their name, without |
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39 * prior written permission of the Apache Software Foundation. |
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40 * |
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41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
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45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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52 * SUCH DAMAGE. |
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53 * ==================================================================== |
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54 * |
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55 * This software consists of voluntary contributions made by many |
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56 * individuals on behalf of the Apache Software Foundation. For more |
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57 * information on the Apache Software Foundation, please see |
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58 * <http://www.apache.org/>. |
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59 */ |
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60 |
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61 import java.io.*; |
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62 |
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63 import java.util.Map; |
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64 import java.util.HashMap; |
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65 |
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66 import com.sun.org.apache.bcel.internal.classfile.*; |
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67 |
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68 /** |
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69 * The repository maintains information about which classes have |
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70 * been loaded. |
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71 * |
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72 * It loads its data from the ClassLoader implementation |
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73 * passed into its constructor. |
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74 * |
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75 * @see com.sun.org.apache.bcel.internal.Repository |
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76 * |
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77 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
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78 * @author David Dixon-Peugh |
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79 */ |
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80 public class ClassLoaderRepository |
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81 implements Repository |
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82 { |
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83 private java.lang.ClassLoader loader; |
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84 private HashMap loadedClasses = |
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85 new HashMap(); // CLASSNAME X JAVACLASS |
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86 |
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87 public ClassLoaderRepository( java.lang.ClassLoader loader ) { |
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88 this.loader = loader; |
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89 } |
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90 |
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91 /** |
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92 * Store a new JavaClass into this Repository. |
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93 */ |
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94 public void storeClass( JavaClass clazz ) { |
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95 loadedClasses.put( clazz.getClassName(), |
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96 clazz ); |
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97 clazz.setRepository( this ); |
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98 } |
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99 |
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100 /** |
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101 * Remove class from repository |
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102 */ |
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103 public void removeClass(JavaClass clazz) { |
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104 loadedClasses.remove(clazz.getClassName()); |
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105 } |
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106 |
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107 /** |
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108 * Find an already defined JavaClass. |
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109 */ |
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110 public JavaClass findClass( String className ) { |
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111 if ( loadedClasses.containsKey( className )) { |
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112 return (JavaClass) loadedClasses.get( className ); |
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113 } else { |
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114 return null; |
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115 } |
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116 } |
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117 |
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118 /** |
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119 * Lookup a JavaClass object from the Class Name provided. |
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120 */ |
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121 public JavaClass loadClass( String className ) |
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122 throws ClassNotFoundException |
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123 { |
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124 String classFile = className.replace('.', '/'); |
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125 |
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126 JavaClass RC = findClass( className ); |
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127 if (RC != null) { return RC; } |
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128 |
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129 try { |
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130 InputStream is = |
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131 loader.getResourceAsStream( classFile + ".class" ); |
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132 |
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133 if(is == null) { |
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134 throw new ClassNotFoundException(className + " not found."); |
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135 } |
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136 |
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137 ClassParser parser = new ClassParser( is, className ); |
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138 RC = parser.parse(); |
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139 |
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140 storeClass( RC ); |
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141 |
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142 return RC; |
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143 } catch (IOException e) { |
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144 throw new ClassNotFoundException( e.toString() ); |
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145 } |
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146 } |
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147 |
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148 public JavaClass loadClass(Class clazz) throws ClassNotFoundException { |
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149 return loadClass(clazz.getName()); |
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150 } |
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151 |
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152 /** Clear all entries from cache. |
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153 */ |
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154 public void clear() { |
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155 loadedClasses.clear(); |
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156 } |
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157 } |