1 /* |
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2 * Copyright (c) 2010, 2013, 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 |
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24 /* |
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25 * @test |
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26 * @bug 6337171 6996415 |
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27 * @ignore 6996758: Investigate better override bridges strategy |
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28 * @summary javac should create bridge methods when type variable bounds restricted |
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29 * @run main OverrideBridge |
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30 */ |
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31 |
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32 // fix, and test, has been disabled as a consequence of 6996415 |
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33 |
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34 import java.io.*; |
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35 import java.net.URI; |
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36 import java.util.ArrayList; |
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37 import java.util.Arrays; |
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38 import java.util.List; |
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39 import java.util.Map; |
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40 import java.util.HashMap; |
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41 import javax.tools.JavaCompiler; |
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42 import javax.tools.JavaFileObject; |
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43 import javax.tools.SimpleJavaFileObject; |
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44 import javax.tools.ToolProvider; |
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45 |
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46 import com.sun.source.util.JavacTask; |
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47 import com.sun.tools.classfile.ClassFile; |
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48 import com.sun.tools.classfile.ConstantPoolException; |
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49 import com.sun.tools.classfile.Descriptor.InvalidDescriptor; |
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50 import com.sun.tools.classfile.Method; |
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51 |
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52 public class OverrideBridge { |
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53 |
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54 enum Implementation { |
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55 IMPLICIT(""), |
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56 EXPLICIT("@Override public abstract X m(X x);"); |
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57 |
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58 String impl; |
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59 |
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60 Implementation(String impl) { |
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61 this.impl = impl; |
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62 } |
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63 } |
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64 |
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65 static class JavaSource extends SimpleJavaFileObject { |
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66 |
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67 final static String sourceStub = |
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68 "abstract class A<X> {\n" + |
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69 " public abstract X m(X x);\n" + |
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70 "}\n" + |
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71 "interface I<X> {\n" + |
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72 "X m(X x);\n" + |
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73 "}\n" + |
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74 "abstract class B<X extends B<X>> extends A<X> implements I<X> { #B }\n" + |
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75 "abstract class C<X extends C<X>> extends B<X> { #C }\n" + |
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76 "abstract class D<X extends D<X>> extends C<X> { #D }\n"; |
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77 |
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78 String source; |
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79 |
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80 public JavaSource(Implementation implB, Implementation implC, Implementation implD) { |
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81 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE); |
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82 source = sourceStub.replace("#B", implB.impl).replace("#C", implC.impl).replace("#D", implD.impl); |
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83 } |
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84 |
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85 @Override |
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86 public CharSequence getCharContent(boolean ignoreEncodingErrors) { |
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87 return source; |
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88 } |
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89 } |
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90 |
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91 public static void main(String... args) throws Exception { |
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92 Map<ClassFile, List<Method>> refMembers = |
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93 compile(Implementation.EXPLICIT, Implementation.EXPLICIT, Implementation.EXPLICIT, "ref"); |
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94 int i = 0; |
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95 for (Implementation implB : Implementation.values()) { |
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96 for (Implementation implC : Implementation.values()) { |
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97 for (Implementation implD : Implementation.values()) { |
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98 Map<ClassFile, List<Method>> membersToCheck = compile(implB, implC, implD, "out_" + i++); |
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99 check(refMembers, membersToCheck); |
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100 } |
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101 } |
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102 } |
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103 } |
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104 |
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105 static String workDir = System.getProperty("user.dir"); |
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106 |
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107 static Map<ClassFile, List<Method>> compile(Implementation implB, Implementation implC, Implementation implD, String destPath) throws Exception { |
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108 File destDir = new File(workDir, destPath); destDir.mkdir(); |
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109 final JavaCompiler tool = ToolProvider.getSystemJavaCompiler(); |
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110 JavaSource source = new JavaSource(implB, implC, implD); |
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111 JavacTask ct = (JavacTask)tool.getTask(null, null, null, |
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112 Arrays.asList("-d", destPath), null, Arrays.asList(source)); |
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113 ct.generate(); |
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114 Map<ClassFile, List<Method>> members = new HashMap<>(); |
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115 addMembers(destDir, members); |
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116 return members; |
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117 } |
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118 |
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119 static void addMembers(File destDir, Map<ClassFile, List<Method>> members) { |
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120 String[] names = { "B.class", "C.class", "D.class" }; |
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121 try { |
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122 for (String name : names) { |
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123 File f = new File(destDir, name); |
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124 ClassFile cf = ClassFile.read(f); |
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125 members.put(cf, readMethod(cf, "m")); |
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126 } |
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127 } catch (Exception e) { |
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128 e.printStackTrace(); |
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129 throw new Error("error reading classes"); |
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130 } |
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131 } |
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132 |
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133 static List<Method> readMethod(ClassFile cf, String name) throws ConstantPoolException { |
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134 List<Method> buf = new ArrayList<>(); |
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135 for (Method m : cf.methods) { |
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136 if (m.getName(cf.constant_pool).equals(name)) { |
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137 buf.add(m); |
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138 } |
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139 } |
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140 return buf; |
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141 } |
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142 |
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143 static void check(Map<ClassFile, List<Method>> refMembers, Map<ClassFile, List<Method>> membersToCheck) throws ConstantPoolException, InvalidDescriptor { |
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144 for (Map.Entry<ClassFile, List<Method>> ref : refMembers.entrySet()) { |
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145 ClassFile cRef = ref.getKey(); |
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146 for (Method mRef : ref.getValue()) { |
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147 boolean ok = false; |
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148 for (Map.Entry<ClassFile, List<Method>> toCheck : membersToCheck.entrySet()) { |
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149 ClassFile cToCheck = toCheck.getKey(); |
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150 for (Method mToCheck : toCheck.getValue()) { |
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151 if (cRef.getName().equals(cToCheck.getName()) && |
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152 mRef.descriptor.getReturnType(cRef.constant_pool).equals( |
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153 mToCheck.descriptor.getReturnType(cToCheck.constant_pool)) && |
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154 mRef.descriptor.getParameterTypes(cRef.constant_pool).equals( |
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155 mToCheck.descriptor.getParameterTypes(cToCheck.constant_pool))) { |
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156 ok = true; |
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157 } |
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158 } |
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159 } |
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160 if (!ok) { |
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161 throw new AssertionError("Matching method descriptor for " + mRef.descriptor.getParameterTypes(cRef.constant_pool) + "not found"); |
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162 } |
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163 } |
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164 } |
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165 } |
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166 } |
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