Mercurial > hg > truffle
annotate truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/LanguageRegistrationProcessor.java @ 21990:f878f9778548
Restrict LanguageRegistrationProcessor to process Registration annotation.\nFixes problems where it would consume DSL annotations.
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Wed, 08 Jul 2015 11:49:59 +0200 |
parents | 9c8c0937da41 |
children | 78c3d3d8d86e |
rev | line source |
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1 /* |
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2 * Copyright (c) 2012, 2015, 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; |
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24 |
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25 import java.io.*; |
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26 import java.util.*; |
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27 |
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28 import javax.annotation.processing.*; |
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29 import javax.lang.model.*; |
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30 import javax.lang.model.element.*; |
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31 import javax.lang.model.type.*; |
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32 import javax.tools.Diagnostic.Kind; |
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33 import javax.tools.*; |
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34 |
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35 import com.oracle.truffle.api.*; |
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36 import com.oracle.truffle.api.TruffleLanguage.Registration; |
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37 |
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38 @SupportedAnnotationTypes("com.oracle.truffle.api.TruffleLanguage.Registration") |
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39 public final class LanguageRegistrationProcessor extends AbstractProcessor { |
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40 private final List<TypeElement> registrations = new ArrayList<>(); |
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41 |
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42 @Override |
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43 public SourceVersion getSupportedSourceVersion() { |
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44 return SourceVersion.latest(); |
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45 } |
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46 |
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47 private void generateFile(List<TypeElement> languages) { |
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48 String filename = "META-INF/truffle/language"; |
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49 Properties p = new Properties(); |
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50 int cnt = 0; |
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51 for (TypeElement l : languages) { |
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52 Registration annotation = l.getAnnotation(Registration.class); |
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53 if (annotation == null) { |
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54 continue; |
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55 } |
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56 String prefix = "language" + ++cnt + "."; |
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57 String className = processingEnv.getElementUtils().getBinaryName(l).toString(); |
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58 p.setProperty(prefix + "name", annotation.name()); |
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59 p.setProperty(prefix + "version", annotation.version()); |
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60 p.setProperty(prefix + "className", className); |
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61 String[] mimes = annotation.mimeType(); |
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62 for (int i = 0; i < mimes.length; i++) { |
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63 p.setProperty(prefix + "mimeType." + i, mimes[i]); |
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64 } |
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65 } |
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66 if (cnt > 0) { |
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67 try { |
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68 FileObject file = processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", filename, languages.toArray(new Element[0])); |
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69 try (OutputStream os = file.openOutputStream()) { |
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70 p.store(os, "Generated by " + LanguageRegistrationProcessor.class.getName()); |
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71 } |
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72 } catch (IOException e) { |
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73 processingEnv.getMessager().printMessage(Kind.ERROR, e.getMessage(), languages.get(0)); |
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74 } |
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75 } |
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76 } |
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77 |
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78 @Override |
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79 public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) { |
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80 if (roundEnv.processingOver()) { |
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81 generateFile(registrations); |
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82 registrations.clear(); |
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83 return true; |
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84 } |
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85 for (Element e : roundEnv.getElementsAnnotatedWith(Registration.class)) { |
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86 Registration annotation = e.getAnnotation(Registration.class); |
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87 if (annotation != null && e.getKind() == ElementKind.CLASS) { |
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88 if (!e.getModifiers().contains(Modifier.PUBLIC)) { |
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89 emitError("Registered language class must be public", e); |
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90 continue; |
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91 } |
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92 if (e.getEnclosingElement().getKind() != ElementKind.PACKAGE && !e.getModifiers().contains(Modifier.STATIC)) { |
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93 emitError("Registered language inner-class must be static", e); |
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94 continue; |
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95 } |
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96 TypeMirror truffleLang = processingEnv.getElementUtils().getTypeElement(TruffleLanguage.class.getName()).asType(); |
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97 if (!processingEnv.getTypeUtils().isAssignable(e.asType(), truffleLang)) { |
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98 emitError("Registered language class must subclass TruffleLanguage", e); |
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99 continue; |
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100 } |
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101 boolean found = false; |
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102 for (Element mem : e.getEnclosedElements()) { |
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103 if (mem.getKind() != ElementKind.CONSTRUCTOR) { |
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104 continue; |
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105 } |
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106 ExecutableElement ee = (ExecutableElement) mem; |
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107 if (ee.getParameters().size() != 1) { |
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108 continue; |
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109 } |
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110 if (!ee.getModifiers().contains(Modifier.PUBLIC)) { |
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111 continue; |
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112 } |
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113 TypeMirror env = processingEnv.getElementUtils().getTypeElement(TruffleLanguage.Env.class.getCanonicalName()).asType(); |
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114 if (processingEnv.getTypeUtils().isSameType(ee.getParameters().get(0).asType(), env)) { |
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115 found = true; |
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116 break; |
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117 } |
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118 } |
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119 if (!found) { |
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120 emitError("Language must have a public constructor accepting TruffleLanguage.Env as parameter", e); |
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121 continue; |
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122 } |
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123 assertNoErrorExpected(e); |
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124 registrations.add((TypeElement) e); |
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125 } |
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126 } |
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127 |
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128 return true; |
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129 } |
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130 |
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131 void assertNoErrorExpected(Element e) { |
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132 ExpectError.assertNoErrorExpected(processingEnv, e); |
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133 } |
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134 |
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135 void emitError(String msg, Element e) { |
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136 if (ExpectError.isExpectedError(processingEnv, e, msg)) { |
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137 return; |
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138 } |
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139 processingEnv.getMessager().printMessage(Kind.ERROR, msg, e); |
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140 } |
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141 |
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142 } |