Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/util/ObjectConverter.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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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
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19 package gov.nasa.jpf.util;
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20
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21 import gov.nasa.jpf.JPFException;
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22 import gov.nasa.jpf.vm.ClassInfo;
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23 import gov.nasa.jpf.vm.ClinitRequired;
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24 import gov.nasa.jpf.vm.ElementInfo;
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25 import gov.nasa.jpf.vm.FieldInfo;
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26 import gov.nasa.jpf.vm.Fields;
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27 import gov.nasa.jpf.vm.MJIEnv;
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28
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29 import java.lang.reflect.Array;
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30 import java.lang.reflect.Field;
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31
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32 /**
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33 * Object transformer from Java objects to JPF objects
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34 * @author Ivan Mushketik
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35 */
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36 public class ObjectConverter {
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37 /**
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38 * Create JPF object from Java object
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39 * @param env - MJI environment
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40 * @param javaObject - java object that is used to created JPF object from
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41 * @return reference to new JPF object
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42 */
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43 public static int JPFObjectFromJavaObject(MJIEnv env, Object javaObject) throws ClinitRequired {
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44 Class<?> javaClass = javaObject.getClass();
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45 String typeName = javaClass.getName();
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46 int newObjRef = env.newObject(typeName);
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47 ElementInfo newObjEI = env.getModifiableElementInfo(newObjRef);
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48
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49 ClassInfo ci = env.getClassInfo(newObjRef);
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50
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51 while (ci != null) {
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52 for (FieldInfo fi : ci.getDeclaredInstanceFields()) {
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53 if (!fi.isReference()) {
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54 setJPFPrimitive(newObjEI, fi, javaObject);
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55 }
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56 else {
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57 try {
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58 Field arrField = getField(fi.getName(), javaClass);
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59 arrField.setAccessible(true);
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60 Object fieldJavaObj = arrField.get(javaObject);
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61
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62 int fieldJPFObjRef;
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63 if (isArrayField(fi)) {
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64 fieldJPFObjRef = getJPFArrayRef(env, fieldJavaObj);
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65 } else {
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66 fieldJPFObjRef = JPFObjectFromJavaObject(env, fieldJavaObj);
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67 }
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68
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69 newObjEI.setReferenceField(fi, fieldJPFObjRef);
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70
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71 } catch (NoSuchFieldException nsfx){
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72 throw new JPFException("JPF object creation failed, no such field: " + fi.getFullName(), nsfx);
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73 } catch (IllegalAccessException iax){
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74 throw new JPFException("JPF object creation failed, illegal access: " + fi.getFullName(), iax);
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75 }
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76 }
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77 }
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78
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79 ci = ci.getSuperClass();
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80 }
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81
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82 return newObjRef;
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83 }
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84
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85 private Object createObject(String className) {
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86 return null;
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87 }
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88
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89 private static void setJPFPrimitive(ElementInfo newObjEI, FieldInfo fi, Object javaObject) {
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90 try {
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91
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92 String jpfTypeName = fi.getType();
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93 Class javaClass = javaObject.getClass();
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94 Field javaField = getField(fi.getName(), javaClass);
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95 javaField.setAccessible(true);
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96
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97 if (jpfTypeName.equals("char")) {
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98 newObjEI.setCharField(fi, javaField.getChar(javaObject));
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99 }
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100 else if (jpfTypeName.equals("byte")) {
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101 newObjEI.setByteField(fi, javaField.getByte(javaObject));
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102 }
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103 else if (jpfTypeName.equals("short")) {
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104 newObjEI.setShortField(fi, javaField.getShort(javaObject));
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105 }
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106 else if (jpfTypeName.equals("int")) {
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107 newObjEI.setIntField(fi, javaField.getInt(javaObject));
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108 }
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109 else if (jpfTypeName.equals("long")) {
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110 newObjEI.setLongField(fi, javaField.getLong(javaObject));
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111 }
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112 else if (jpfTypeName.equals("float")) {
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113 newObjEI.setFloatField(fi, javaField.getFloat(javaObject));
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114 }
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115 else if (jpfTypeName.equals("double")) {
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116 newObjEI.setDoubleField(fi, javaField.getDouble(javaObject));
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117 }
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118 }
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119 catch (Exception ex) {
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120 throw new JPFException(ex);
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121 }
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122 }
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123
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124 private static Field getField(String fieldName, Class javaClass) throws NoSuchFieldException {
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125 while (true) {
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126 try {
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127 Field field = javaClass.getDeclaredField(fieldName);
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128 return field;
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129 } catch (NoSuchFieldException ex) {
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130 // Try to search this field in a super class
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131 javaClass = javaClass.getSuperclass();
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132
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133 // No more super class. Wrong field
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134 if (javaClass == null) {
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135 throw ex;
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136 }
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137 }
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138 }
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139
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140 }
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141
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142 private static int getJPFArrayRef(MJIEnv env, Object javaArr) throws NoSuchFieldException, IllegalAccessException {
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143
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144 Class arrayElementClass = javaArr.getClass().getComponentType();
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145
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146 int javaArrLength = Array.getLength(javaArr);
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147 int arrRef;
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148
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149 if (arrayElementClass == Character.TYPE) {
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150 arrRef = env.newCharArray(javaArrLength);
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151 ElementInfo charArrRef = env.getModifiableElementInfo(arrRef);
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152 char[] charArr = charArrRef.asCharArray();
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153
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154 for (int i = 0; i < javaArrLength; i++) {
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155 charArr[i] = Array.getChar(javaArr, i);
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156 }
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157 }
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158 else if (arrayElementClass == Byte.TYPE) {
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159 arrRef = env.newByteArray(javaArrLength);
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160 ElementInfo byteArrRef = env.getModifiableElementInfo(arrRef);
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161 byte[] byteArr = byteArrRef.asByteArray();
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162
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163 for (int i = 0; i < javaArrLength; i++) {
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164 byteArr[i] = Array.getByte(javaArr, i);
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165 }
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166 }
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167 else if (arrayElementClass == Short.TYPE) {
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168 arrRef = env.newShortArray(javaArrLength);
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169 ElementInfo shortArrRef = env.getModifiableElementInfo(arrRef);
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170 short[] shortArr = shortArrRef.asShortArray();
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171
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172 for (int i = 0; i < javaArrLength; i++) {
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173 shortArr[i] = Array.getShort(javaArr, i);
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174 }
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175 }
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176 else if (arrayElementClass == Integer.TYPE) {
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177 arrRef = env.newIntArray(javaArrLength);
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178 ElementInfo intArrRef = env.getModifiableElementInfo(arrRef);
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179 int[] intArr = intArrRef.asIntArray();
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180
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181 for (int i = 0; i < javaArrLength; i++) {
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182 intArr[i] = Array.getInt(javaArr, i);
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183 }
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184 }
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185 else if (arrayElementClass == Long.TYPE) {
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186 arrRef = env.newLongArray(javaArrLength);
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187 ElementInfo longArrRef = env.getModifiableElementInfo(arrRef);
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188 long[] longArr = longArrRef.asLongArray();
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189
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190 for (int i = 0; i < javaArrLength; i++) {
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191 longArr[i] = Array.getLong(javaArr, i);
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192 }
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193 }
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194 else if (arrayElementClass == Float.TYPE) {
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195 arrRef = env.newFloatArray(javaArrLength);
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196 ElementInfo floatArrRef = env.getModifiableElementInfo(arrRef);
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197 float[] floatArr = floatArrRef.asFloatArray();
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198
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199 for (int i = 0; i < javaArrLength; i++) {
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200 floatArr[i] = Array.getFloat(javaArr, i);
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201 }
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202 }
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203 else if (arrayElementClass == Double.TYPE) {
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204 arrRef = env.newDoubleArray(javaArrLength);
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205 ElementInfo floatArrRef = env.getModifiableElementInfo(arrRef);
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206 double[] doubleArr = floatArrRef.asDoubleArray();
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207
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208 for (int i = 0; i < javaArrLength; i++) {
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209 doubleArr[i] = Array.getDouble(javaArr, i);
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210 }
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211 }
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212 else {
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213 arrRef = env.newObjectArray(arrayElementClass.getCanonicalName(), javaArrLength);
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214 ElementInfo arrayEI = env.getModifiableElementInfo(arrRef);
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215
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216 Fields fields = arrayEI.getFields();
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217
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218 for (int i = 0; i < javaArrLength; i++) {
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219 int newArrElRef;
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220 Object javaArrEl = Array.get(javaArr, i);
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diff changeset
221
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222 if (javaArrEl != null) {
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223 if (javaArrEl.getClass().isArray()) {
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224 newArrElRef = getJPFArrayRef(env, javaArrEl);
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225 }
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226 else {
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diff changeset
227 newArrElRef = JPFObjectFromJavaObject(env, javaArrEl);
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228 }
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229 }
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230 else {
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231 newArrElRef = MJIEnv.NULL;
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232 }
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diff changeset
233
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234 fields.setReferenceValue(i, newArrElRef);
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diff changeset
235 }
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diff changeset
236 }
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diff changeset
237
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238 return arrRef;
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239 }
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240
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diff changeset
241 // Do we need this??
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242 public static Object javaObjectFromJPFObject(ElementInfo ei) {
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diff changeset
243 try {
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244 String typeName = ei.getType();
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245 Class clazz = ClassLoader.getSystemClassLoader().loadClass(typeName);
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246
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diff changeset
247 Object javaObject = clazz.newInstance();
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diff changeset
248 ClassInfo ci = ei.getClassInfo();
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diff changeset
249 while (ci != null) {
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diff changeset
250
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251 for (FieldInfo fi : ci.getDeclaredInstanceFields()) {
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diff changeset
252 if (!fi.isReference()) {
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diff changeset
253 setJavaPrimitive(javaObject, ei, fi);
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diff changeset
254 }
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diff changeset
255 }
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diff changeset
256
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diff changeset
257 ci = ci.getSuperClass();
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diff changeset
258 }
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diff changeset
259
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diff changeset
260 return javaObject;
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diff changeset
261 } catch (Exception ex) {
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diff changeset
262 throw new JPFException(ex);
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diff changeset
263 }
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parents:
diff changeset
264 }
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diff changeset
265
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diff changeset
266 private static void setJavaPrimitive(Object javaObject, ElementInfo ei, FieldInfo fi) throws NoSuchFieldException, IllegalAccessException {
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diff changeset
267 String primitiveType = fi.getName();
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diff changeset
268 String fieldName = fi.getName();
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diff changeset
269
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diff changeset
270 Class javaClass = javaObject.getClass();
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diff changeset
271 Field javaField = javaClass.getDeclaredField(fieldName);
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diff changeset
272 javaField.setAccessible(true);
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diff changeset
273
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diff changeset
274 if (primitiveType.equals("char")) {
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diff changeset
275 javaField.setChar(javaObject, ei.getCharField(fi));
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diff changeset
276 }
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diff changeset
277 else if (primitiveType.equals("byte")) {
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diff changeset
278 javaField.setByte(javaObject, ei.getByteField(fi));
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diff changeset
279 }
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diff changeset
280 else if (primitiveType.equals("short")) {
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diff changeset
281 javaField.setShort(javaObject, ei.getShortField(fi));
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diff changeset
282 }
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diff changeset
283 else if (primitiveType.equals("int")) {
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diff changeset
284 javaField.setInt(javaObject, ei.getIntField(fi));
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diff changeset
285 }
61d41facf527 initial v8 import (history reset)
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parents:
diff changeset
286 else if (primitiveType.equals("long")) {
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287 javaField.setLong(javaObject, ei.getLongField(fi));
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288 }
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289 else if (primitiveType.equals("float")) {
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290 javaField.setFloat(javaObject, ei.getFloatField(fi));
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291 }
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292 else if (primitiveType.equals("double")) {
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293 javaField.setDouble(javaObject, ei.getDoubleField(fi));
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294 }
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295 else {
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296 throw new JPFException("Can't convert " + primitiveType + " to " +
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297 javaField.getClass().getCanonicalName());
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298 }
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299 }
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300
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301 private static boolean isArrayField(FieldInfo fi) {
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302 return fi.getType().lastIndexOf('[') >= 0;
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303 }
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304
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305
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306 }