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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/AnnotationProcessor.java @ 13710:36b53fe97fae

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Truffle-DSL: added default buffering to all java source code that is written. JavaFileObject#openWriter may return a non-buffered writer.
author Christian Humer <christian.humer@gmail.com>
date Mon, 20 Jan 2014 15:23:10 +0100
parents 79041ab43660
children bd28da642eea
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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;
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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.element.*;
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30 import javax.lang.model.type.*;
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31 import javax.tools.*;
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33 import com.oracle.truffle.dsl.processor.ast.*;
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34 import com.oracle.truffle.dsl.processor.codewriter.*;
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35 import com.oracle.truffle.dsl.processor.compiler.*;
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36 import com.oracle.truffle.dsl.processor.template.*;
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37
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38 /**
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39 * THIS IS NOT PUBLIC API.
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40 */
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41 class AnnotationProcessor<M extends Template> {
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42
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43 private final AbstractParser<M> parser;
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44 private final CompilationUnitFactory<M> factory;
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45 private final ProcessorContext context;
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46
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47 private final Set<String> processedElements = new HashSet<>();
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48
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49 public AnnotationProcessor(ProcessorContext context, AbstractParser<M> parser, CompilationUnitFactory<M> factory) {
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50 this.context = context;
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51 this.parser = parser;
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52 this.factory = factory;
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53 }
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54
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55 public AbstractParser<M> getParser() {
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56 return parser;
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57 }
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58
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59 public ProcessorContext getContext() {
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60 return context;
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61 }
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62
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63 @SuppressWarnings({"unchecked"})
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64 public void process(RoundEnvironment env, Element element, boolean callback) {
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65
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66 // since it is not guaranteed to be called only once by the compiler
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67 // we check for already processed elements to avoid errors when writing files.
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68 if (!callback && element instanceof TypeElement) {
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69 String qualifiedName = Utils.getQualifiedName((TypeElement) element);
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70 if (processedElements.contains(qualifiedName)) {
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71 return;
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72 }
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73 processedElements.add(qualifiedName);
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74 }
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75
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76 TypeElement type = (TypeElement) element;
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77
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78 M model = (M) context.getTemplate(type.asType(), false);
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79 boolean firstRun = !context.containsTemplate(type);
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80
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81 if (firstRun || !callback) {
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82 context.registerTemplate(type, null);
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83 model = parser.parse(env, element);
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84 context.registerTemplate(type, model);
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85
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86 if (model != null) {
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87 CodeCompilationUnit unit = factory.process(null, model);
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88 unit.setGeneratorAnnotationMirror(model.getTemplateTypeAnnotation());
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89 unit.setGeneratorElement(model.getTemplateType());
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90
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91 DeclaredType overrideType = (DeclaredType) context.getType(Override.class);
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92 DeclaredType unusedType = (DeclaredType) context.getType(SuppressWarnings.class);
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93 unit.accept(new GenerateOverrideVisitor(overrideType), null);
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94 unit.accept(new FixWarningsVisitor(context, unusedType, overrideType), null);
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95
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96 if (!callback) {
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97 unit.accept(new CodeWriter(context.getEnvironment(), element), null);
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98 }
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99 }
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100 }
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101 }
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103 private static class CodeWriter extends AbstractCodeWriter {
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104
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105 private final Element originalElement;
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106 private final ProcessingEnvironment env;
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108 public CodeWriter(ProcessingEnvironment env, Element originalElement) {
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109 this.env = env;
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110 this.originalElement = originalElement;
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111 }
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112
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113 @Override
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114 protected Writer createWriter(CodeTypeElement clazz) throws IOException {
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115 JavaFileObject jfo = env.getFiler().createSourceFile(clazz.getQualifiedName(), originalElement);
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116 return new BufferedWriter(jfo.openWriter());
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117 }
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118
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119 @Override
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120 protected void writeHeader() {
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121 if (env == null) {
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122 return;
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123 }
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124 String comment = CompilerFactory.getCompiler(originalElement).getHeaderComment(env, originalElement);
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125 if (comment != null) {
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126 writeLn(comment);
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127 }
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128 }
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130 }
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132 }