1 /* |
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2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.mxtool.junit; |
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24 |
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25 import java.lang.reflect.Method; |
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26 import java.util.Arrays; |
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27 import java.util.Set; |
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28 |
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29 /** |
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30 * Facade for the {@code java.lang.Module} class introduced in JDK9 that allows tests to be |
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31 * developed against JDK8 but use module logic if deployed on JDK9. |
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32 */ |
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33 class JLModule { |
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34 |
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35 private final Object realModule; |
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36 |
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37 JLModule(Object module) { |
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38 this.realModule = module; |
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39 } |
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40 |
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41 private static final Class<?> moduleClass; |
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42 private static final Class<?> layerClass; |
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43 |
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44 private static final Method bootMethod; |
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45 private static final Method modulesMethod; |
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46 private static final Method getModuleMethod; |
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47 private static final Method getUnnamedModuleMethod; |
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48 private static final Method getNameMethod; |
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49 private static final Method getPackagesMethod; |
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50 private static final Method isExportedMethod; |
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51 private static final Method isExported2Method; |
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52 private static final Method addExportsMethod; |
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53 private static final Method addOpensMethod; |
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54 static { |
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55 try { |
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56 moduleClass = findModuleClass(); |
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57 Class<?> modulesClass = Class.forName("jdk.internal.module.Modules"); |
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58 layerClass = findModuleLayerClass(); |
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59 bootMethod = layerClass.getMethod("boot"); |
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60 modulesMethod = layerClass.getMethod("modules"); |
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61 getModuleMethod = Class.class.getMethod("getModule"); |
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62 getUnnamedModuleMethod = ClassLoader.class.getMethod("getUnnamedModule"); |
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63 getNameMethod = moduleClass.getMethod("getName"); |
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64 getPackagesMethod = moduleClass.getMethod("getPackages"); |
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65 isExportedMethod = moduleClass.getMethod("isExported", String.class); |
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66 isExported2Method = moduleClass.getMethod("isExported", String.class, moduleClass); |
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67 addExportsMethod = modulesClass.getDeclaredMethod("addExports", moduleClass, String.class, moduleClass); |
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68 addOpensMethod = getDeclaredMethodOptional(modulesClass, "addOpens", moduleClass, String.class, moduleClass); |
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69 } catch (Exception e) { |
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70 throw new AssertionError(e); |
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71 } |
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72 } |
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73 |
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74 // API change http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/afedee84773e. |
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75 protected static Class<?> findModuleClass() throws ClassNotFoundException { |
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76 try { |
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77 return Class.forName("java.lang.Module"); |
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78 } catch (ClassNotFoundException e) { |
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79 return Class.forName("java.lang.reflect.Module"); |
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80 } |
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81 } |
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82 |
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83 // API change http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/afedee84773e. |
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84 protected static Class<?> findModuleLayerClass() throws ClassNotFoundException { |
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85 try { |
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86 return Class.forName("java.lang.ModuleLayer"); |
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87 } catch (ClassNotFoundException e) { |
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88 return Class.forName("java.lang.reflect.Layer"); |
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89 } |
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90 } |
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91 |
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92 private static Method getDeclaredMethodOptional(Class<?> declaringClass, String name, Class<?>... parameterTypes) { |
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93 try { |
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94 return declaringClass.getDeclaredMethod(name, parameterTypes); |
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95 } catch (NoSuchMethodException e) { |
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96 return null; |
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97 } |
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98 } |
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99 |
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100 public static JLModule fromClass(Class<?> cls) { |
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101 try { |
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102 return new JLModule(getModuleMethod.invoke(cls)); |
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103 } catch (Exception e) { |
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104 throw new AssertionError(e); |
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105 } |
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106 } |
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107 |
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108 @SuppressWarnings("unchecked") |
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109 public static JLModule find(String name) { |
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110 try { |
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111 Object bootLayer = bootMethod.invoke(null); |
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112 Set<Object> modules = (Set<Object>) modulesMethod.invoke(bootLayer); |
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113 for (Object m : modules) { |
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114 JLModule module = new JLModule(m); |
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115 String mname = module.getName(); |
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116 if (mname.equals(name)) { |
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117 return module; |
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118 } |
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119 } |
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120 } catch (Exception e) { |
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121 throw new InternalError(e); |
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122 } |
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123 return null; |
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124 } |
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125 |
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126 public static JLModule getUnnamedModuleFor(ClassLoader cl) { |
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127 try { |
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128 return new JLModule(getUnnamedModuleMethod.invoke(cl)); |
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129 } catch (Exception e) { |
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130 throw new AssertionError(e); |
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131 } |
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132 } |
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133 |
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134 public String getName() { |
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135 try { |
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136 return (String) getNameMethod.invoke(realModule); |
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137 } catch (Exception e) { |
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138 throw new AssertionError(e); |
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139 } |
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140 } |
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141 |
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142 /** |
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143 * Exports all packages in this module to a given module. |
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144 */ |
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145 public void exportAllPackagesTo(JLModule module) { |
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146 if (this != module) { |
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147 for (String pkg : getPackages()) { |
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148 // Export all JVMCI packages dynamically instead |
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149 // of requiring a long list of -XaddExports |
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150 // options on the JVM command line. |
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151 if (!isExported(pkg, module)) { |
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152 addExports(pkg, module); |
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153 addOpens(pkg, module); |
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154 } |
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155 } |
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156 } |
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157 } |
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158 |
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159 @SuppressWarnings("unchecked") |
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160 public Iterable<String> getPackages() { |
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161 try { |
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162 // API change http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/afedee84773e#l1.15 |
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163 Object res = getPackagesMethod.invoke(realModule); |
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164 if (res instanceof String[]) { |
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165 return Arrays.asList((String[]) res); |
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166 } |
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167 return (Set<String>) res; |
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168 } catch (Exception e) { |
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169 throw new AssertionError(e); |
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170 } |
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171 } |
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172 |
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173 public boolean isExported(String pn) { |
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174 try { |
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175 return (Boolean) isExportedMethod.invoke(realModule, pn); |
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176 } catch (Exception e) { |
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177 throw new AssertionError(e); |
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178 } |
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179 } |
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180 |
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181 public boolean isExported(String pn, JLModule other) { |
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182 try { |
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183 return (Boolean) isExported2Method.invoke(realModule, pn, other.realModule); |
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184 } catch (Exception e) { |
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185 throw new AssertionError(e); |
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186 } |
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187 } |
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188 |
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189 public void addExports(String pn, JLModule other) { |
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190 try { |
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191 addExportsMethod.invoke(null, realModule, pn, other.realModule); |
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192 } catch (Exception e) { |
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193 throw new AssertionError(e); |
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194 } |
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195 } |
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196 |
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197 public void addOpens(String pn, JLModule other) { |
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198 if (addOpensMethod != null) { |
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199 try { |
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200 addOpensMethod.invoke(null, realModule, pn, other.realModule); |
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201 } catch (Exception e) { |
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202 throw new AssertionError(e); |
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203 } |
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204 } |
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205 } |
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206 |
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207 @Override |
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208 public String toString() { |
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209 return realModule.toString(); |
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210 } |
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211 } |
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