Mercurial > hg > Members > kono > jpf-core

annotate src/peers/gov/nasa/jpf/vm/JPF_java_lang_reflect_Constructor.java @ 0:61d41facf527

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author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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children db918c531e6d
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18 package gov.nasa.jpf.vm;
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19
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20 import java.lang.reflect.Modifier;
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21
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22 import gov.nasa.jpf.Config;
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23 import gov.nasa.jpf.annotation.MJI;
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24 import gov.nasa.jpf.util.MethodInfoRegistry;
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25 import gov.nasa.jpf.util.RunListener;
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26 import gov.nasa.jpf.util.RunRegistry;
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27
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28 /**
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29 * native peer for rudimentary constructor reflection.
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30 *
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31 * Unfortunately, this is quite redundant to the Method peer, but Constructor
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32 * is not a Method subclass, and hence we can't rely on it's initialization
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33 */
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34 public class JPF_java_lang_reflect_Constructor extends NativePeer {
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35
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36 static MethodInfoRegistry registry;
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37
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38 public static boolean init (Config conf) {
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39 // this is an example of how to handle cross-initialization between
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40 // native peers - this might also get explicitly called by the java.lang.Class
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41 // peer, since it creates Constructor objects. Here we have to make sure
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42 // we only reset between JPF runs
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43
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44 if (registry == null){
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45 registry = new MethodInfoRegistry();
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46
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47 RunRegistry.getDefaultRegistry().addListener( new RunListener() {
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48 @Override
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49 public void reset (RunRegistry reg){
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50 registry = null;
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51 }
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52 });
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53 }
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54 return true;
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55 }
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56
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57 static int createConstructorObject (MJIEnv env, ClassInfo ciCtor, MethodInfo mi){
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58 // note - it is the callers responsibility to ensure Constructor is properly initialized
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59
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60 int regIdx = registry.registerMethodInfo(mi);
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61 int eidx = env.newObject(ciCtor);
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62 ElementInfo ei = env.getModifiableElementInfo(eidx);
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63
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64 ei.setIntField("regIdx", regIdx);
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65 return eidx;
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66 }
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67
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68 static MethodInfo getMethodInfo (MJIEnv env, int objRef){
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69 return registry.getMethodInfo(env,objRef, "regIdx");
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70 }
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71
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72 @MJI
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73 public int getName____Ljava_lang_String_2 (MJIEnv env, int objRef) {
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74 MethodInfo mi = getMethodInfo(env, objRef);
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75
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76 int nameRef = env.getReferenceField( objRef, "name");
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77 if (nameRef == MJIEnv.NULL) {
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78 nameRef = env.newString(mi.getName());
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79 env.setReferenceField(objRef, "name", nameRef);
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80 }
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81
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82 return nameRef;
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83 }
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84
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85 // <2do> .. and some more delegations to JPF_java_lang_Method
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86
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87 @MJI
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88 public int newInstance___3Ljava_lang_Object_2__Ljava_lang_Object_2 (MJIEnv env, int mthRef, int argsRef) {
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89 ThreadInfo ti = env.getThreadInfo();
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90 DirectCallStackFrame frame = ti.getReturnedDirectCall();
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91 MethodInfo miCallee = getMethodInfo(env,mthRef);
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92
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93 if (frame == null) { // first time
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94 ClassInfo ci = miCallee.getClassInfo();
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95
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96 if (ci.isAbstract()){
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97 env.throwException("java.lang.InstantiationException");
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98 return MJIEnv.NULL;
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99 }
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100
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101 int objRef = env.newObjectOfUncheckedClass( ci);
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102 frame = miCallee.createDirectCallStackFrame( ti, 1);
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103 frame.setReflection();
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104
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105 frame.setLocalReferenceVariable(0, objRef); // (1) store the objRef for retrieval during re-exec
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106
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107 int argOffset = frame.setReferenceArgument(0, objRef, null);
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108 if (!JPF_java_lang_reflect_Method.pushUnboxedArguments( env, miCallee, frame, argOffset, argsRef)) {
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109 // we've got a IllegalArgumentException
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110 return MJIEnv.NULL;
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111 }
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112 ti.pushFrame(frame);
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113
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114 ci.pushRequiredClinits(ti);
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115
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116 env.repeatInvocation();
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117 return MJIEnv.NULL;
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118
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119 } else { // reflection call returned
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120 int objRef = frame.getLocalVariable(0); // that's the object ref we stored in (1)
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121 return objRef;
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122 }
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123 }
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124
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125 @MJI
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126 public int getParameterTypes_____3Ljava_lang_Class_2 (MJIEnv env, int objRef){
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127 // kind of dangerous, but we don't refer to any fields and the underlying JPF construct
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128 // (MethodInfo) is the same, so we just delegate to avoid copying non-trivial code
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129 return JPF_java_lang_reflect_Method.getParameterTypes (env, getMethodInfo(env,objRef));
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130 }
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131
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132 @MJI
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133 public int getAnnotations_____3Ljava_lang_annotation_Annotation_2 (MJIEnv env, int objRef){
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134 // <2do> check if ctor annotations are inherited, which is a bit off
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135 return JPF_java_lang_reflect_Method.getAnnotations( env, getMethodInfo(env,objRef));
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136 }
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137
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138 @MJI
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139 public int getDeclaredAnnotations_____3Ljava_lang_annotation_Annotation_2 (MJIEnv env, int objRef){
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140 return JPF_java_lang_reflect_Method.getDeclaredAnnotations( env, getMethodInfo(env,objRef));
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141 }
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142
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143 @MJI
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144 public int getAnnotation__Ljava_lang_Class_2__Ljava_lang_annotation_Annotation_2 (MJIEnv env, int objRef, int annotationClsRef) {
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145 return JPF_java_lang_reflect_Method.getAnnotation( env, getMethodInfo(env,objRef), annotationClsRef);
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146 }
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147
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148 @MJI
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149 public int getParameterAnnotations_____3_3Ljava_lang_annotation_Annotation_2 (MJIEnv env, int objRef){
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150 return JPF_java_lang_reflect_Method.getParameterAnnotations( env, getMethodInfo(env,objRef));
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151 }
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152
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153 @MJI
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154 public int getModifiers____I (MJIEnv env, int objRef){
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155 MethodInfo mi = getMethodInfo(env, objRef);
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156 return mi.getModifiers();
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157 }
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158
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159 @MJI
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160 public int getDeclaringClass____Ljava_lang_Class_2 (MJIEnv env, int objRef){
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161 MethodInfo mi = getMethodInfo(env, objRef);
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162 ClassInfo ci = mi.getClassInfo();
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163 // can't get a Constructor object w/o having initialized it's declaring class first
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164 return ci.getClassObjectRef();
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165 }
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166
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167 @MJI
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168 public int toString____Ljava_lang_String_2 (MJIEnv env, int objRef){
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169 StringBuilder sb = new StringBuilder();
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170
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171 MethodInfo mi = getMethodInfo(env, objRef);
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172
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173 sb.append(Modifier.toString(mi.getModifiers()));
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174 sb.append(' ');
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175
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176 sb.append(mi.getClassInfo().getName());
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177 sb.append('(');
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178
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179 String[] at = mi.getArgumentTypeNames();
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180 for (int i=0; i<at.length; i++){
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181 if (i>0) sb.append(',');
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182 sb.append(at[i]);
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183 }
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184
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185 sb.append(')');
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186
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187 int sref = env.newString(sb.toString());
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188 return sref;
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189 }
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190
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191 @MJI
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192 public boolean equals__Ljava_lang_Object_2__Z (MJIEnv env, int objRef, int mthRef){
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193 ElementInfo ei = env.getElementInfo(mthRef);
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194 ClassInfo ci = ClassLoaderInfo.getSystemResolvedClassInfo(JPF_java_lang_Class.CONSTRUCTOR_CLASSNAME);
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195
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196 if (ei.getClassInfo() == ci){
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197 MethodInfo mi1 = getMethodInfo(env, objRef);
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198 MethodInfo mi2 = getMethodInfo(env, mthRef);
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199 if (mi1.getClassInfo() == mi2.getClassInfo()){
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200 if (mi1.getName().equals(mi2.getName())){
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201 if (mi1.getReturnType().equals(mi2.getReturnType())){
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202 byte[] params1 = mi1.getArgumentTypes();
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203 byte[] params2 = mi2.getArgumentTypes();
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204 if (params1.length == params2.length){
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205 for (int i = 0; i < params1.length; i++){
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206 if (params1[i] != params2[i])
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207 return false;
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208 }
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209 return true;
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210 }
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211 }
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212 }
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213 }
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214 }
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215 return false;
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216 }
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217
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218 @MJI
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219 public int hashCode____I (MJIEnv env, int objRef){
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220 MethodInfo ctor = getMethodInfo(env, objRef);
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221 return ctor.getClassName().hashCode();
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222 }
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223 }