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annotate truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/java/compiler/JDTCompiler.java @ 22548:6b76a24fffbd default tip

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author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Thu, 14 Jan 2016 14:20:57 +0100
parents 4a43dc00a654
children
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1 /*
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2 * Copyright (c) 2012, 2014, 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.truffle.dsl.processor.java.compiler;
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24
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25 import com.oracle.truffle.dsl.processor.java.ElementUtils;
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26
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27 import java.util.ArrayList;
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28 import java.util.Arrays;
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29 import java.util.Collections;
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30 import java.util.Comparator;
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31 import java.util.HashMap;
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32 import java.util.List;
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33 import java.util.Map;
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34 import java.util.TreeMap;
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35
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36 import javax.annotation.processing.ProcessingEnvironment;
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37 import javax.lang.model.element.Element;
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38 import javax.lang.model.element.ExecutableElement;
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39 import javax.lang.model.element.TypeElement;
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41 public class JDTCompiler extends AbstractCompiler {
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43 public static boolean isValidElement(Element currentElement) {
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44 try {
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45 Class<?> elementClass = Class.forName("org.eclipse.jdt.internal.compiler.apt.model.ElementImpl");
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46 return elementClass.isAssignableFrom(currentElement.getClass());
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47 } catch (ClassNotFoundException e) {
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48 return false;
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49 }
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50 }
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51
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52 /**
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53 * @see "https://bugs.openjdk.java.net/browse/JDK-8039214"
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54 */
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55 @SuppressWarnings("unused")
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56 private static List<Element> newElementList(List<? extends Element> src) {
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57 List<Element> workaround = new ArrayList<Element>(src);
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58 return workaround;
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59 }
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60
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61 public List<? extends Element> getAllMembersInDeclarationOrder(ProcessingEnvironment environment, TypeElement type) {
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62 return sortBySourceOrder(newElementList(environment.getElementUtils().getAllMembers(type)));
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63 }
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64
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65 public List<? extends Element> getEnclosedElementsInDeclarationOrder(TypeElement type) {
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66 return sortBySourceOrder(newElementList(type.getEnclosedElements()));
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67 }
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68
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69 private static List<? extends Element> sortBySourceOrder(List<Element> elements) {
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70 Map<TypeElement, List<Element>> groupedByEnclosing = new HashMap<>();
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71 for (Element element : elements) {
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72 Element enclosing = element.getEnclosingElement();
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73 List<Element> grouped = groupedByEnclosing.get(enclosing);
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74 if (grouped == null) {
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75 grouped = new ArrayList<>();
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76 groupedByEnclosing.put((TypeElement) enclosing, grouped);
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77 }
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78 grouped.add(element);
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79 }
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80
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81 for (TypeElement enclosing : groupedByEnclosing.keySet()) {
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82 Collections.sort(groupedByEnclosing.get(enclosing), createSourceOrderComparator(enclosing));
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83 }
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84
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85 if (groupedByEnclosing.size() == 1) {
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86 return groupedByEnclosing.get(groupedByEnclosing.keySet().iterator().next());
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87 } else {
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88 List<TypeElement> enclosingTypes = new ArrayList<>(groupedByEnclosing.keySet());
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89
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90 Collections.sort(enclosingTypes, new Comparator<TypeElement>() {
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91 public int compare(TypeElement o1, TypeElement o2) {
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92 if (ElementUtils.isSubtype(o1.asType(), o2.asType())) {
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93 return 1;
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94 } else {
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95 return -1;
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96 }
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97 }
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98 });
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99
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100 List<Element> sourceOrderElements = new ArrayList<>();
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101 for (TypeElement typeElement : enclosingTypes) {
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102 sourceOrderElements.addAll(groupedByEnclosing.get(typeElement));
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103 }
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104 return sourceOrderElements;
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105 }
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106
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107 }
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108
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109 private static Comparator<Element> createSourceOrderComparator(final TypeElement enclosing) {
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110
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111 Comparator<Element> comparator = new Comparator<Element>() {
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112
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113 final List<Object> declarationOrder = lookupDeclarationOrder(enclosing);
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114
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115 public int compare(Element o1, Element o2) {
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116 try {
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117 Element enclosing1Element = o1.getEnclosingElement();
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118 Element enclosing2Element = o2.getEnclosingElement();
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119
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120 if (!ElementUtils.typeEquals(enclosing1Element.asType(), enclosing2Element.asType())) {
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121 throw new AssertionError();
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122 }
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123
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124 Object o1Binding = field(o1, "_binding");
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125 Object o2Binding = field(o2, "_binding");
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126
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127 int i1 = declarationOrder.indexOf(o1Binding);
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128 int i2 = declarationOrder.indexOf(o2Binding);
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129
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130 if (i1 == -1 || i2 == -1) {
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131 return 0;
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132 }
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133
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134 return i1 - i2;
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135 } catch (Exception e) {
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136 throw new RuntimeException(e);
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137 }
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138 }
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139 };
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140 return comparator;
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141 }
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142
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143 private static List<Object> lookupDeclarationOrder(TypeElement type) {
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144
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145 List<Object> declarationOrder;
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146 try {
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147 Object binding = field(type, "_binding");
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148 Class<?> sourceTypeBinding = Class.forName("org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding");
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149 Class<?> binaryTypeBinding = Class.forName("org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding");
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150
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151 declarationOrder = null;
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152 if (sourceTypeBinding.isAssignableFrom(binding.getClass())) {
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153 declarationOrder = findSourceTypeOrder(binding);
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154 } else if (binaryTypeBinding.isAssignableFrom(binding.getClass())) {
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155 declarationOrder = findBinaryTypeOrder(binding);
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156 }
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157 } catch (Exception e) {
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158 throw new RuntimeException(e);
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159 }
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160
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161 return declarationOrder;
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162 }
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163
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164 private static List<Object> findBinaryTypeOrder(Object binding) throws Exception {
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165 Object binaryType = lookupBinaryType(binding);
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166 final Object[] sortedMethods = (Object[]) method(binaryType, "getMethods");
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167
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168 List<Object> sortedElements = new ArrayList<>();
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169 if (sortedMethods != null) {
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170 sortedElements.addAll(Arrays.asList(sortedMethods));
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171 }
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172 final Object[] sortedFields = (Object[]) method(binaryType, "getFields");
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173 if (sortedFields != null) {
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174 sortedElements.addAll(Arrays.asList(sortedFields));
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175 }
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176 final Object[] sortedTypes = (Object[]) method(binaryType, "getMemberTypes", new Class<?>[0]);
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177 if (sortedTypes != null) {
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178 sortedElements.addAll(Arrays.asList(sortedTypes));
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179 }
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180
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181 Collections.sort(sortedElements, new Comparator<Object>() {
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182 public int compare(Object o1, Object o2) {
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183 try {
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184 int structOffset1 = (int) field(o1, "structOffset");
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185 int structOffset2 = (int) field(o2, "structOffset");
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186 return structOffset1 - structOffset2;
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187 } catch (Exception e) {
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188 throw new RuntimeException(e);
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189 }
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190 }
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191 });
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diff changeset
192
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diff changeset
193 Class<?> binaryMethod = Class.forName("org.eclipse.jdt.internal.compiler.env.IBinaryMethod");
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194 Class<?> binaryField = Class.forName("org.eclipse.jdt.internal.compiler.env.IBinaryField");
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195 Class<?> nestedType = Class.forName("org.eclipse.jdt.internal.compiler.env.IBinaryNestedType");
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196
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197 List<Object> bindings = new ArrayList<>();
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198 for (Object sortedElement : sortedElements) {
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199 Class<?> elementClass = sortedElement.getClass();
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200 if (binaryMethod.isAssignableFrom(elementClass)) {
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diff changeset
201 char[] selector = (char[]) method(sortedElement, "getSelector");
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202 Object[] foundBindings = (Object[]) method(binding, "getMethods", new Class<?>[]{char[].class}, selector);
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203 if (foundBindings == null || foundBindings.length == 0) {
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diff changeset
204 continue;
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diff changeset
205 } else if (foundBindings.length == 1) {
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diff changeset
206 bindings.add(foundBindings[0]);
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207 } else {
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diff changeset
208 char[] idescriptor = (char[]) method(sortedElement, "getMethodDescriptor");
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diff changeset
209 for (Object foundBinding : foundBindings) {
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diff changeset
210 char[] descriptor = (char[]) method(foundBinding, "signature");
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diff changeset
211 if (descriptor == null && idescriptor == null || Arrays.equals(descriptor, idescriptor)) {
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diff changeset
212 bindings.add(foundBinding);
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diff changeset
213 break;
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diff changeset
214 }
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215 }
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diff changeset
216 }
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217 } else if (binaryField.isAssignableFrom(elementClass)) {
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218 char[] selector = (char[]) method(sortedElement, "getName");
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219 Object foundField = method(binding, "getField", new Class<?>[]{char[].class, boolean.class}, selector, true);
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220 if (foundField != null) {
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221 bindings.add(foundField);
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222 }
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223 } else if (nestedType.isAssignableFrom(elementClass)) {
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224 char[] selector = (char[]) method(sortedElement, "getSourceName");
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225 Object foundType = method(binding, "getMemberType", new Class<?>[]{char[].class}, selector);
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226 if (foundType != null) {
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227 bindings.add(foundType);
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228 }
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229 } else {
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230 throw new AssertionError("Unexpected encountered type " + elementClass);
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231 }
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232 }
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233
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234 return bindings;
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235 }
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236
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237 private static Object lookupBinaryType(Object binding) throws Exception {
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238 Object lookupEnvironment = field(binding, "environment");
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239 Object compoundClassName = field(binding, "compoundName");
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240 Object nameEnvironment = field(lookupEnvironment, "nameEnvironment");
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241 Object nameEnvironmentAnswer = method(nameEnvironment, "findType", new Class<?>[]{char[][].class}, compoundClassName);
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242 Object binaryType = method(nameEnvironmentAnswer, "getBinaryType", new Class<?>[0]);
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243 return binaryType;
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244 }
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245
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246 private static List<Object> findSourceTypeOrder(Object binding) throws Exception {
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247 Object referenceContext = field(field(binding, "scope"), "referenceContext");
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248
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249 TreeMap<Integer, Object> orderedBindings = new TreeMap<>();
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250
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251 collectSourceOrder(orderedBindings, referenceContext, "methods");
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252 collectSourceOrder(orderedBindings, referenceContext, "fields");
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253 collectSourceOrder(orderedBindings, referenceContext, "memberTypes");
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254
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255 return new ArrayList<>(orderedBindings.values());
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256 }
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257
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258 private static void collectSourceOrder(TreeMap<Integer, Object> orderedBindings, Object referenceContext, String fieldName) throws Exception {
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259 Object[] declarations = (Object[]) field(referenceContext, fieldName);
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260 if (declarations != null) {
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261 for (int i = 0; i < declarations.length; i++) {
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262 Integer declarationSourceStart = (Integer) field(declarations[i], "declarationSourceStart");
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263 orderedBindings.put(declarationSourceStart, field(declarations[i], "binding"));
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264 }
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265 }
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266 }
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267
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268 @Override
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269 public String getMethodBody(ProcessingEnvironment env, ExecutableElement method) {
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270 try {
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271
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272 char[] source = getSource(method);
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273 if (source == null) {
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274 return null;
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275 }
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276
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277 /*
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278 * AbstractMethodDeclaration decl =
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279 * ((MethodBinding)(((ElementImpl)method)._binding)).sourceMethod(); int bodyStart =
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280 * decl.bodyStart; int bodyEnd = decl.bodyEnd;
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281 */
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282 Object decl = method(field(method, "_binding"), "sourceMethod");
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283 int bodyStart = (int) field(decl, "bodyStart");
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284 int bodyEnd = (int) field(decl, "bodyEnd");
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285
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286 int length = bodyEnd - bodyStart;
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287 char[] target = new char[length];
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288 System.arraycopy(source, bodyStart, target, 0, length);
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289
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290 return new String(target);
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291 } catch (Exception e) {
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292 return ElementUtils.printException(e);
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293 }
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294 }
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295
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296 private static char[] getSource(Element element) throws Exception {
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297 /*
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298 * Binding binding = ((ElementImpl)element)._binding; char[] source = null; if (binding
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299 * instanceof MethodBinding) { source = ((MethodBinding)
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300 * binding).sourceMethod().compilationResult.getCompilationUnit().getContents(); } else if
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301 * (binding instanceof SourceTypeBinding) { source =
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302 * ((SourceTypeBinding)binding).scope.referenceContext
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303 * .compilationResult.compilationUnit.getContents(); } return source;
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304 */
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305
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306 Object binding = field(element, "_binding");
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307 Class<?> methodBindingClass = Class.forName("org.eclipse.jdt.internal.compiler.lookup.MethodBinding");
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308 Class<?> referenceBindingClass = Class.forName("org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding");
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309
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310 char[] source = null;
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311 if (methodBindingClass.isAssignableFrom(binding.getClass())) {
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312 Object sourceMethod = method(binding, "sourceMethod");
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313 if (sourceMethod == null) {
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314 return null;
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315 }
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316 source = (char[]) method(method(field(sourceMethod, "compilationResult"), "getCompilationUnit"), "getContents");
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317 } else if (referenceBindingClass.isAssignableFrom(binding.getClass())) {
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318 source = (char[]) method(field(field(field(field(binding, "scope"), "referenceContext"), "compilationResult"), "compilationUnit"), "getContents");
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319 }
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320 return source;
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321 }
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322
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323 @Override
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324 public String getHeaderComment(ProcessingEnvironment env, Element type) {
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325 try {
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326 char[] source = getSource(type);
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327 if (source == null) {
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328 return null;
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329 }
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330 return parseHeader(new String(source));
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331 } catch (Exception e) {
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332 return ElementUtils.printException(e);
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333 }
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334 }
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335
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336 }