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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/LanguageRegistrationProcessor.java @ 21494:f5b49d881909

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Truffle-DSL: move internal @ExpectError annotation from public API to the test package only; share expect error handling between new processors.
author Christian Humer <christian.humer@gmail.com>
date Tue, 26 May 2015 20:04:08 +0200
parents bb51b9a142b3
children 31fc2fce38f3
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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.*")
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39 public final class LanguageRegistrationProcessor extends AbstractProcessor {
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40 @Override
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41 public SourceVersion getSupportedSourceVersion() {
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42 return SourceVersion.latest();
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43 }
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44
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45 private void createProviderFile(TypeElement language, Registration annotation) {
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46 String filename = "META-INF/truffle/language";
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47 try {
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48 FileObject file = processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", filename, language);
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49 Properties p = new Properties();
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50 String className = processingEnv.getElementUtils().getBinaryName(language).toString();
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51 p.setProperty("name", annotation.name());
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52 p.setProperty("className", className);
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53 String[] mimes = annotation.mimeType();
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54 for (int i = 0; i < mimes.length; i++) {
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55 p.setProperty("mimeType." + i, mimes[i]);
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56 }
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57 try (OutputStream os = file.openOutputStream()) {
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58 p.store(os, "Generated by " + LanguageRegistrationProcessor.class.getName());
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59 }
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60 } catch (IOException e) {
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61 processingEnv.getMessager().printMessage(Kind.ERROR, e.getMessage(), language);
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62 }
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63 }
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64
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65 @Override
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66 public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
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67 for (Element e : roundEnv.getElementsAnnotatedWith(Registration.class)) {
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68 Registration annotation = e.getAnnotation(Registration.class);
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69 if (annotation != null && e.getKind() == ElementKind.CLASS) {
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70 if (!e.getModifiers().contains(Modifier.PUBLIC)) {
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71 emitError("Registered language class must be public", e);
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72 continue;
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73 }
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74 if (e.getEnclosingElement().getKind() != ElementKind.PACKAGE && !e.getModifiers().contains(Modifier.STATIC)) {
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75 emitError("Registered language inner-class must be static", e);
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76 continue;
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77 }
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78 TypeMirror truffleLang = processingEnv.getElementUtils().getTypeElement(TruffleLanguage.class.getName()).asType();
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79 if (!processingEnv.getTypeUtils().isAssignable(e.asType(), truffleLang)) {
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80 emitError("Registered language class must subclass TruffleLanguage", e);
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81 continue;
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82 }
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83 boolean found = false;
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84 for (Element mem : e.getEnclosedElements()) {
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85 if (mem.getKind() != ElementKind.CONSTRUCTOR) {
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86 continue;
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87 }
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88 ExecutableElement ee = (ExecutableElement) mem;
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89 if (ee.getParameters().size() != 1) {
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90 continue;
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91 }
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92 if (!ee.getModifiers().contains(Modifier.PUBLIC)) {
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93 continue;
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94 }
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95 TypeMirror env = processingEnv.getElementUtils().getTypeElement(TruffleLanguage.Env.class.getCanonicalName()).asType();
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96 if (processingEnv.getTypeUtils().isSameType(ee.getParameters().get(0).asType(), env)) {
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97 found = true;
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98 break;
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99 }
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100 }
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101 if (!found) {
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102 emitError("Language must have a public constructor accepting TruffleLanguage.Env as parameter", e);
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103 continue;
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104 }
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105 assertNoErrorExpected(e);
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106 createProviderFile((TypeElement) e, annotation);
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107 }
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108 }
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109
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110 return true;
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111 }
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112
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113 void assertNoErrorExpected(Element e) {
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114 ExpectError.assertNoErrorExpected(processingEnv, e);
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115 }
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116
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117 void emitError(String msg, Element e) {
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118 if (ExpectError.isExpectedError(processingEnv, e, msg)) {
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119 return;
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120 }
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121 processingEnv.getMessager().printMessage(Kind.ERROR, msg, e);
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122 }
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123
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124 }