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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/java/transform/FixWarningsVisitor.java @ 16759:23415229349b

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Truffle-DSL: new package structure.
author Christian Humer <christian.humer@gmail.com>
date Mon, 11 Aug 2014 15:57:14 +0200
parents graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/codewriter/FixWarningsVisitor.java@bd28da642eea
children 45c8f64978d6
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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 static com.oracle.truffle.dsl.processor.java.ElementUtils.*;
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26 import static javax.lang.model.element.Modifier.*;
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27
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28 import java.io.*;
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29 import java.util.*;
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31 import javax.lang.model.element.*;
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32 import javax.lang.model.type.*;
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33
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34 import com.oracle.truffle.dsl.processor.*;
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35 import com.oracle.truffle.dsl.processor.java.*;
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36 import com.oracle.truffle.dsl.processor.java.model.*;
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37
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38 public class FixWarningsVisitor extends CodeElementScanner<Void, Void> {
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39
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40 private final Set<String> symbolsUsed = new HashSet<>();
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41
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42 private final ProcessorContext context;
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43 private final DeclaredType unusedAnnotation;
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44 private final DeclaredType overrideType;
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45
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46 public FixWarningsVisitor(ProcessorContext context, DeclaredType unusedAnnotation, DeclaredType overrideType) {
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47 this.context = context;
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48 this.unusedAnnotation = unusedAnnotation;
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49 this.overrideType = overrideType;
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50 }
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51
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52 @Override
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53 public Void visitType(CodeTypeElement e, Void p) {
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54 List<TypeElement> superTypes = ElementUtils.getSuperTypes(e);
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55 for (TypeElement type : superTypes) {
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56 String qualifiedName = ElementUtils.getQualifiedName(type);
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57 if (qualifiedName.equals(Serializable.class.getCanonicalName())) {
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58 if (!e.containsField("serialVersionUID")) {
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59 e.add(new CodeVariableElement(modifiers(PRIVATE, STATIC, FINAL), context.getType(long.class), "serialVersionUID", "1L"));
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60 }
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61 break;
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62 }
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63 }
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64
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65 return super.visitType(e, p);
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66 }
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67
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68 @Override
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69 public Void visitExecutable(CodeExecutableElement e, Void p) {
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70 if (e.getParameters().isEmpty()) {
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71 return null;
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72 } else if (e.getModifiers().contains(Modifier.ABSTRACT)) {
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73 return null;
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74 } else if (containsOverride(e)) {
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75 return null;
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76 }
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77
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78 symbolsUsed.clear();
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79 super.visitExecutable(e, p);
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80
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81 for (VariableElement parameter : e.getParameters()) {
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82 if (!symbolsUsed.contains(parameter.getSimpleName().toString())) {
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83 e.getAnnotationMirrors().add(createUnusedAnnotationMirror());
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84 break;
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85 }
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86 }
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87 return null;
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88 }
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89
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90 private boolean containsOverride(CodeExecutableElement e) {
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91 for (AnnotationMirror mirror : e.getAnnotationMirrors()) {
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92 if (ElementUtils.typeEquals(overrideType, mirror.getAnnotationType())) {
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93 return true;
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94 }
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95 }
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96 return false;
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97 }
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98
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99 private CodeAnnotationMirror createUnusedAnnotationMirror() {
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100 CodeAnnotationMirror mirror = new CodeAnnotationMirror(unusedAnnotation);
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101 mirror.setElementValue(mirror.findExecutableElement("value"), new CodeAnnotationValue("unused"));
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102 return mirror;
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103 }
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104
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105 @Override
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106 public void visitTree(CodeTree e, Void p) {
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107 if (e.getString() != null) {
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108 computeSymbols(e.getString());
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109 }
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110 super.visitTree(e, p);
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111 }
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112
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113 private void computeSymbols(String s) {
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114 // TODO there should not be any need for a StringTokenizer if we have a real AST for
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115 // method bodies. Also the current solution is not perfect. What if one token
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116 // is spread across multiple CodeTree instances? But for now that works.
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117 StringTokenizer tokenizer = new StringTokenizer(s, ".= :,()[];{}\"\"'' ", false);
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118 while (tokenizer.hasMoreElements()) {
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119 String token = tokenizer.nextToken().trim();
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120 if (token.length() > 0) {
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121 symbolsUsed.add(token);
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122 }
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123 }
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124 }
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125
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126 }