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annotate truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/parser/AbstractParser.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 9c8c0937da41
children
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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 com.oracle.truffle.dsl.processor.CompileErrorException;
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26 import com.oracle.truffle.dsl.processor.Log;
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27 import com.oracle.truffle.dsl.processor.ProcessorContext;
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28 import com.oracle.truffle.dsl.processor.java.ElementUtils;
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29 import com.oracle.truffle.dsl.processor.model.MessageContainer;
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30 import com.oracle.truffle.dsl.processor.model.MessageContainer.Message;
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31 import java.lang.annotation.Annotation;
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32 import java.util.ArrayList;
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33 import java.util.Collections;
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34 import java.util.HashSet;
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35 import java.util.List;
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36 import java.util.Set;
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37 import javax.annotation.processing.ProcessingEnvironment;
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38 import javax.lang.model.element.AnnotationMirror;
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39 import javax.lang.model.element.Element;
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40 import javax.lang.model.element.ElementKind;
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41 import javax.lang.model.element.ExecutableElement;
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42 import javax.tools.Diagnostic.Kind;
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43
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44 /**
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45 * THIS IS NOT PUBLIC API.
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46 */
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47 public abstract class AbstractParser<M extends MessageContainer> {
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48
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49 protected final ProcessorContext context;
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50 protected final ProcessingEnvironment processingEnv;
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51
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52 protected final Log log;
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53
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54 public AbstractParser() {
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55 this.context = ProcessorContext.getInstance();
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56 this.processingEnv = context.getEnvironment();
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57 this.log = context.getLog();
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58 }
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59
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60 public final M parse(Element element) {
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61 M model = null;
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62 try {
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63 AnnotationMirror mirror = null;
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64 if (getAnnotationType() != null) {
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65 mirror = ElementUtils.findAnnotationMirror(processingEnv, element.getAnnotationMirrors(), getAnnotationType());
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66 }
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67
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68 if (!context.getTruffleTypes().verify(context, element, mirror)) {
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69 return null;
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70 }
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71 model = parse(element, mirror);
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72 if (model == null) {
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73 return null;
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74 }
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75
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76 redirectMessages(new HashSet<MessageContainer>(), model, model);
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77 model.emitMessages(context, log);
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78 return filterErrorElements(model);
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79 } catch (CompileErrorException e) {
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80 log.message(Kind.WARNING, element, null, null, "The truffle processor could not parse class due to error: %s", e.getMessage());
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81 return null;
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82 }
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83 }
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84
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85 private void redirectMessages(Set<MessageContainer> visitedSinks, MessageContainer model, MessageContainer baseContainer) {
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86 List<Message> messages = model.getMessages();
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87 for (int i = messages.size() - 1; i >= 0; i--) {
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88 Message message = messages.get(i);
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89 if (!ElementUtils.isEnclosedIn(baseContainer.getMessageElement(), message.getOriginalContainer().getMessageElement())) {
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90 // redirect message
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91 MessageContainer original = message.getOriginalContainer();
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92 String text = wrapText(original.getMessageElement(), original.getMessageAnnotation(), message.getText());
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93 Message redirectedMessage = new Message(null, null, baseContainer, text, message.getKind());
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94 model.getMessages().remove(i);
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95 baseContainer.getMessages().add(redirectedMessage);
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96 }
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97 }
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98
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99 for (MessageContainer childContainer : model) {
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100 if (visitedSinks.contains(childContainer)) {
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101 continue;
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102 }
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103 visitedSinks.add(childContainer);
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104
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105 MessageContainer newBase = baseContainer;
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106 if (childContainer.getBaseContainer() != null) {
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107 newBase = childContainer.getBaseContainer();
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108 }
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109 redirectMessages(visitedSinks, childContainer, newBase);
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110 }
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111 }
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112
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113 private static String wrapText(Element element, AnnotationMirror mirror, String text) {
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114 StringBuilder b = new StringBuilder();
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115 if (element != null) {
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116 if (element.getKind() == ElementKind.METHOD) {
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117 b.append("Method " + ElementUtils.createReferenceName((ExecutableElement) element));
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118 } else {
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119 b.append("Element " + element.getSimpleName());
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120 }
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121 }
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122 if (mirror != null) {
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123 b.append(" at annotation @" + ElementUtils.getSimpleName(mirror.getAnnotationType()).trim());
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124 }
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125
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126 if (b.length() > 0) {
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127 b.append(" is erroneous: ").append(text);
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128 return b.toString();
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129 } else {
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130 return text;
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131 }
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132 }
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133
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134 protected M filterErrorElements(M model) {
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135 return model.hasErrors() ? null : model;
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136 }
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137
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138 protected abstract M parse(Element element, AnnotationMirror mirror);
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139
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140 public abstract Class<? extends Annotation> getAnnotationType();
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141
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142 public boolean isDelegateToRootDeclaredType() {
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143 return false;
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144 }
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145
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146 public List<Class<? extends Annotation>> getAllAnnotationTypes() {
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147 List<Class<? extends Annotation>> list = new ArrayList<>();
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148 if (getAnnotationType() != null) {
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149 list.add(getAnnotationType());
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150 }
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151 list.addAll(getTypeDelegatedAnnotationTypes());
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152 return list;
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153 }
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154
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155 public List<Class<? extends Annotation>> getTypeDelegatedAnnotationTypes() {
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156 return Collections.emptyList();
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157 }
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158
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159 }