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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/parser/AbstractParser.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/AbstractParser.java@bd28da642eea
children 89f635cbd85e
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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.parser;
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24
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25 import java.lang.annotation.*;
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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.element.*;
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30 import javax.tools.Diagnostic.Kind;
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31
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32 import com.oracle.truffle.dsl.processor.*;
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33 import com.oracle.truffle.dsl.processor.java.*;
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34 import com.oracle.truffle.dsl.processor.model.*;
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35 import com.oracle.truffle.dsl.processor.model.MessageContainer.Message;
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36
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37 /**
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38 * THIS IS NOT PUBLIC API.
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39 */
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40 public abstract class AbstractParser<M extends Template> {
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41
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42 protected final ProcessorContext context;
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43 protected final ProcessingEnvironment processingEnv;
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44
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45 protected final Log log;
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46
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47 public AbstractParser() {
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48 this.context = ProcessorContext.getInstance();
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49 this.processingEnv = context.getEnvironment();
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50 this.log = context.getLog();
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51 }
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52
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53 public final M parse(Element element) {
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54 M model = null;
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55 try {
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56 AnnotationMirror mirror = null;
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57 if (getAnnotationType() != null) {
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58 mirror = ElementUtils.findAnnotationMirror(processingEnv, element.getAnnotationMirrors(), getAnnotationType());
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59 }
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60
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61 if (!context.getTruffleTypes().verify(context, element, mirror)) {
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62 return null;
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63 }
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64 model = parse(element, mirror);
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65 if (model == null) {
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66 return null;
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67 }
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68
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69 redirectMessages(new HashSet<MessageContainer>(), model, model);
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70 model.emitMessages(context, log);
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71 return filterErrorElements(model);
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72 } catch (CompileErrorException e) {
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73 log.message(Kind.WARNING, element, null, null, "The truffle processor could not parse class due to error: %s", e.getMessage());
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74 return null;
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75 }
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76 }
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77
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78 private void redirectMessages(Set<MessageContainer> visitedSinks, MessageContainer model, MessageContainer baseContainer) {
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79 List<Message> messages = model.getMessages();
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80 for (int i = messages.size() - 1; i >= 0; i--) {
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81 Message message = messages.get(i);
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82 if (!ElementUtils.isEnclosedIn(baseContainer.getMessageElement(), message.getOriginalContainer().getMessageElement())) {
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83 // redirect message
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84 MessageContainer original = message.getOriginalContainer();
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85 String text = wrapText(original.getMessageElement(), original.getMessageAnnotation(), message.getText());
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86 Message redirectedMessage = new Message(null, baseContainer, text, message.getKind());
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87 model.getMessages().remove(i);
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88 baseContainer.getMessages().add(redirectedMessage);
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89 }
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90 }
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91
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92 for (MessageContainer childContainer : model) {
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93 if (visitedSinks.contains(childContainer)) {
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94 continue;
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95 }
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96 visitedSinks.add(childContainer);
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97
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98 MessageContainer newBase = baseContainer;
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99 if (childContainer.getBaseContainer() != null) {
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100 newBase = childContainer.getBaseContainer();
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101 }
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102 redirectMessages(visitedSinks, childContainer, newBase);
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103 }
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104 }
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105
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106 private static String wrapText(Element element, AnnotationMirror mirror, String text) {
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107 StringBuilder b = new StringBuilder();
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108 if (element != null) {
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109 b.append("Element " + element.toString());
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110 }
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111 if (mirror != null) {
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112 b.append(" at annotation @" + ElementUtils.getSimpleName(mirror.getAnnotationType()));
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113 }
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114
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115 if (b.length() > 0) {
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116 b.append(" is erroneous: ").append(text);
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117 return b.toString();
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118 } else {
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119 return text;
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120 }
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121 }
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122
10597
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123 protected M filterErrorElements(M model) {
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124 return model.hasErrors() ? null : model;
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125 }
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126
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127 protected abstract M parse(Element element, AnnotationMirror mirror);
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128
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129 public abstract Class<? extends Annotation> getAnnotationType();
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130
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131 public boolean isDelegateToRootDeclaredType() {
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132 return false;
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133 }
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134
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135 public List<Class<? extends Annotation>> getAllAnnotationTypes() {
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136 List<Class<? extends Annotation>> list = new ArrayList<>();
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137 if (getAnnotationType() != null) {
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138 list.add(getAnnotationType());
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139 }
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140 list.addAll(getTypeDelegatedAnnotationTypes());
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141 return list;
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142 }
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143
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144 public List<Class<? extends Annotation>> getTypeDelegatedAnnotationTypes() {
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145 return Collections.emptyList();
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146 }
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147
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148 }