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annotate truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/java/transform/FixWarningsVisitor.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 9c8c0937da41
children
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1 /*
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2 * Copyright (c) 2012, 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.transform;
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24
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25 import com.oracle.truffle.dsl.processor.java.ElementUtils;
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26 import static com.oracle.truffle.dsl.processor.java.ElementUtils.modifiers;
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27 import com.oracle.truffle.dsl.processor.java.model.CodeAnnotationMirror;
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28 import com.oracle.truffle.dsl.processor.java.model.CodeAnnotationValue;
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29 import com.oracle.truffle.dsl.processor.java.model.CodeElementScanner;
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30 import com.oracle.truffle.dsl.processor.java.model.CodeExecutableElement;
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31 import com.oracle.truffle.dsl.processor.java.model.CodeTree;
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32 import com.oracle.truffle.dsl.processor.java.model.CodeTypeElement;
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33 import com.oracle.truffle.dsl.processor.java.model.CodeVariableElement;
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34 import java.io.Serializable;
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35 import java.util.HashSet;
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36 import java.util.List;
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37 import java.util.Set;
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38 import java.util.StringTokenizer;
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39 import javax.annotation.processing.ProcessingEnvironment;
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40 import javax.lang.model.element.AnnotationMirror;
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41 import javax.lang.model.element.Element;
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42 import javax.lang.model.element.Modifier;
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43 import static javax.lang.model.element.Modifier.FINAL;
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44 import static javax.lang.model.element.Modifier.PRIVATE;
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45 import static javax.lang.model.element.Modifier.STATIC;
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46 import javax.lang.model.element.TypeElement;
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47 import javax.lang.model.element.VariableElement;
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48 import javax.lang.model.type.DeclaredType;
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49
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50 public class FixWarningsVisitor extends CodeElementScanner<Void, Void> {
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51
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52 private final Set<String> symbolsUsed = new HashSet<>();
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53
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54 private final ProcessingEnvironment processingEnv;
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55 private final DeclaredType unusedAnnotation;
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56 private final DeclaredType overrideType;
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57
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58 public FixWarningsVisitor(ProcessingEnvironment processingEnv, DeclaredType unusedAnnotation, DeclaredType overrideType) {
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59 this.processingEnv = processingEnv;
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60 this.unusedAnnotation = unusedAnnotation;
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61 this.overrideType = overrideType;
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62 }
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63
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64 @Override
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65 public Void visitType(CodeTypeElement e, Void p) {
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66 List<TypeElement> superTypes = ElementUtils.getSuperTypes(e);
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67 for (TypeElement type : superTypes) {
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68 String qualifiedName = ElementUtils.getQualifiedName(type);
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69 if (qualifiedName.equals(Serializable.class.getCanonicalName())) {
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70 if (!e.containsField("serialVersionUID")) {
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71 e.add(new CodeVariableElement(modifiers(PRIVATE, STATIC, FINAL), ElementUtils.getType(processingEnv, long.class), "serialVersionUID", "1L"));
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72 }
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73 break;
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74 }
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75 }
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76
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77 return super.visitType(e, p);
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78 }
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79
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80 @Override
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81 public Void visitExecutable(CodeExecutableElement e, Void p) {
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82 if (e.getParameters().isEmpty()) {
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83 return null;
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84 } else if (e.getModifiers().contains(Modifier.ABSTRACT)) {
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85 return null;
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86 } else if (containsOverride(e)) {
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87 return null;
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88 }
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90 symbolsUsed.clear();
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91 super.visitExecutable(e, p);
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92
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93 for (VariableElement parameter : e.getParameters()) {
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94 if (!symbolsUsed.contains(parameter.getSimpleName().toString())) {
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95 e.getAnnotationMirrors().add(createUnusedAnnotationMirror());
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96 break;
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97 }
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98 }
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99 return null;
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100 }
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102 private boolean containsOverride(CodeExecutableElement e) {
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103 for (AnnotationMirror mirror : e.getAnnotationMirrors()) {
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104 if (ElementUtils.typeEquals(overrideType, mirror.getAnnotationType())) {
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105 return true;
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106 }
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107 }
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108 return false;
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109 }
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110
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111 private CodeAnnotationMirror createUnusedAnnotationMirror() {
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112 CodeAnnotationMirror mirror = new CodeAnnotationMirror(unusedAnnotation);
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113 mirror.setElementValue(mirror.findExecutableElement("value"), new CodeAnnotationValue("unused"));
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114 return mirror;
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115 }
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116
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117 @Override
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118 public void visitTree(CodeTree e, Void p, Element enclosingElement) {
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119 if (e.getString() != null) {
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120 computeSymbols(e.getString());
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121 }
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122 super.visitTree(e, p, enclosingElement);
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123 }
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124
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125 private void computeSymbols(String s) {
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126 // TODO there should not be any need for a StringTokenizer if we have a real AST for
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127 // method bodies. Also the current solution is not perfect. What if one token
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128 // is spread across multiple CodeTree instances? But for now that works.
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129 StringTokenizer tokenizer = new StringTokenizer(s, ".= :,()[];{}\"\"'' ", false);
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130 while (tokenizer.hasMoreElements()) {
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131 String token = tokenizer.nextToken().trim();
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132 if (token.length() > 0) {
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133 symbolsUsed.add(token);
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134 }
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135 }
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136 }
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137
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138 }