Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/java/transform/FixWarningsVisitor.java @ 18772:7fab6f106989
Truffle-DSL: avoid some checkstyle errors for generated code.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 05 Jan 2015 01:31:07 +0100 |
parents | 62cfffca9be2 |
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rev | line source |
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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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30 |
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31 import javax.annotation.processing.*; |
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32 import javax.lang.model.element.*; |
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33 import javax.lang.model.type.*; |
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34 |
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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 ProcessingEnvironment processingEnv; |
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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(ProcessingEnvironment processingEnv, DeclaredType unusedAnnotation, DeclaredType overrideType) { |
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47 this.processingEnv = processingEnv; |
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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), ElementUtils.getType(processingEnv, 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, Element enclosingElement) { |
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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, enclosingElement); |
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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 } |