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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/typesystem/TypeSystemParser.java @ 11467:43eab069ca9b

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Truffle-DSL: improved error recovery of type systems and improved error testability infrastructure.
author Christian Humer <christian.humer@gmail.com>
date Thu, 29 Aug 2013 19:19:00 +0200
parents 4830676526e3
children 2fb276f5e3e9
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1 /*
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2 * Copyright (c) 2012, 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.typesystem;
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25 import static com.oracle.truffle.dsl.processor.Utils.*;
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27 import java.lang.annotation.*;
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28 import java.util.*;
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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.lang.model.util.*;
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34 import com.oracle.truffle.api.dsl.*;
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35 import com.oracle.truffle.dsl.processor.*;
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36 import com.oracle.truffle.dsl.processor.template.*;
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38 public class TypeSystemParser extends TemplateParser<TypeSystemData> {
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39
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40 public static final List<Class<? extends Annotation>> ANNOTATIONS = Arrays.asList(TypeSystem.class, ExpectError.class);
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41
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42 public TypeSystemParser(ProcessorContext c) {
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43 super(c);
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44 }
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46 @Override
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47 public Class<? extends Annotation> getAnnotationType() {
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48 return TypeSystem.class;
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49 }
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51 @Override
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52 protected TypeSystemData parse(Element element, AnnotationMirror mirror) {
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53 TypeElement templateType = (TypeElement) element;
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54 AnnotationMirror templateTypeAnnotation = mirror;
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55 TypeSystemData typeSystem = new TypeSystemData(templateType, templateTypeAnnotation);
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56
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57 // annotation type on class path!?
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58 TypeElement annotationTypeElement = processingEnv.getElementUtils().getTypeElement(getAnnotationType().getCanonicalName());
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59 if (annotationTypeElement == null) {
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60 typeSystem.addError("Required class %s is not on the classpath.", getAnnotationType().getName());
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61 }
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62 if (templateType.getModifiers().contains(Modifier.PRIVATE)) {
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63 typeSystem.addError("A @%s must have at least package protected visibility.", getAnnotationType().getName());
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64 }
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66 if (templateType.getModifiers().contains(Modifier.FINAL)) {
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67 typeSystem.addError("The @%s must not be final.", getAnnotationType().getName());
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68 }
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69 if (typeSystem.hasErrors()) {
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70 return typeSystem;
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71 }
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73 typeSystem.setTypes(parseTypes(typeSystem));
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74 if (typeSystem.getTypes() == null) {
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75 return typeSystem;
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76 }
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78 TypeMirror genericType = context.getType(Object.class);
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79 TypeData voidType = new TypeData(typeSystem, typeSystem.getTypes().size(), null, context.getType(void.class), context.getType(Void.class));
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81 typeSystem.setGenericType(genericType);
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82 typeSystem.setVoidType(voidType);
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84 verifyExclusiveMethodAnnotation(typeSystem, TypeCast.class, TypeCheck.class);
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86 List<Element> elements = new ArrayList<>(context.getEnvironment().getElementUtils().getAllMembers(templateType));
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87 List<ImplicitCastData> implicitCasts = new ImplicitCastParser(context, typeSystem).parse(elements);
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88 List<TypeCastData> casts = new TypeCastParser(context, typeSystem).parse(elements);
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89 List<TypeCheckData> checks = new TypeCheckParser(context, typeSystem).parse(elements);
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90
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91 if (casts == null || checks == null || implicitCasts == null) {
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92 return typeSystem;
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93 }
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94 typeSystem.setCasts(casts);
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95 typeSystem.setChecks(checks);
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97 if (typeSystem.hasErrors()) {
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98 return typeSystem;
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99 }
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101 for (TypeCheckData check : checks) {
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102 check.getCheckedType().addTypeCheck(check);
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103 }
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104
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105 for (TypeCastData cast : casts) {
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106 cast.getTargetType().addTypeCast(cast);
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107 }
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108
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109 verifyGenericTypeChecksAndCasts(typeSystem);
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110 verifyMethodSignatures(typeSystem);
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111 verifyNamesUnique(typeSystem);
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112
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113 return typeSystem;
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114 }
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115
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116 private static void verifyGenericTypeChecksAndCasts(TypeSystemData typeSystem) {
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117 for (TypeData type : typeSystem.getTypes()) {
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118 if (!type.getTypeChecks().isEmpty()) {
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119 boolean hasGeneric = false;
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120 for (TypeCheckData typeCheck : type.getTypeChecks()) {
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121 if (typeCheck.isGeneric()) {
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122 hasGeneric = true;
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123 break;
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124 }
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125 }
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126 if (!hasGeneric) {
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127 type.addError("No generic but specific @%s method %s for type %s specified. " + "Specify a generic @%s method with parameter type %s to resolve this.",
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128 TypeCheck.class.getSimpleName(), TypeSystemCodeGenerator.isTypeMethodName(type), Utils.getSimpleName(type.getBoxedType()), TypeCheck.class.getSimpleName(),
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129 Object.class.getSimpleName());
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130 }
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131 }
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132 if (!type.getTypeCasts().isEmpty()) {
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133 boolean hasGeneric = false;
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134 for (TypeCastData typeCast : type.getTypeCasts()) {
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135 if (typeCast.isGeneric()) {
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136 hasGeneric = true;
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137 break;
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138 }
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139 }
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140 if (!hasGeneric) {
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141 type.addError("No generic but specific @%s method %s for type %s specified. " + "Specify a generic @%s method with parameter type %s to resolve this.",
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142 TypeCast.class.getSimpleName(), TypeSystemCodeGenerator.asTypeMethodName(type), Utils.getSimpleName(type.getBoxedType()), TypeCast.class.getSimpleName(),
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143 Object.class.getSimpleName());
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144 }
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145 }
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146 }
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147 }
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148
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149 private List<TypeData> parseTypes(TypeSystemData typeSystem) {
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150 List<TypeData> types = new ArrayList<>();
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151 List<TypeMirror> typeMirrors = Utils.getAnnotationValueList(TypeMirror.class, typeSystem.getTemplateTypeAnnotation(), "value");
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152 if (typeMirrors.isEmpty()) {
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153 typeSystem.addError("At least one type must be defined.");
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154 return types;
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155 }
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156
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157 final AnnotationValue annotationValue = Utils.getAnnotationValue(typeSystem.getTemplateTypeAnnotation(), "value");
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158 final TypeMirror objectType = context.getType(Object.class);
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159
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160 int index = 0;
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161 for (TypeMirror primitiveType : typeMirrors) {
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162 TypeMirror boxedType = Utils.boxType(context, primitiveType);
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163 TypeData typeData = new TypeData(typeSystem, index, annotationValue, primitiveType, boxedType);
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164
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165 if (isPrimitiveWrapper(primitiveType)) {
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166 typeData.addError("Types must not contain primitive wrapper types.");
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167 }
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168
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169 if (Utils.typeEquals(boxedType, objectType)) {
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170 typeData.addError("Types must not contain the generic type java.lang.Object.");
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171 }
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172
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173 types.add(typeData);
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174 index++;
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175 }
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176
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177 verifyTypeOrder(types);
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178
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179 types.add(new TypeData(typeSystem, index, annotationValue, objectType, objectType));
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180
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181 return types;
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182 }
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183
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184 private static void verifyTypeOrder(List<TypeData> types) {
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185 Map<String, List<String>> invalidTypes = new HashMap<>();
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186
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187 for (int i = types.size() - 1; i >= 0; i--) {
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188 TypeData typeData = types.get(i);
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189 TypeMirror type = typeData.getBoxedType();
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190 if (invalidTypes.containsKey(Utils.getQualifiedName(type))) {
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191 typeData.addError("Invalid type order. The type(s) %s are inherited from a earlier defined type %s.", invalidTypes.get(Utils.getQualifiedName(type)), Utils.getQualifiedName(type));
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192 }
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193 List<String> nextInvalidTypes = Utils.getQualifiedSuperTypeNames(Utils.fromTypeMirror(type));
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194 nextInvalidTypes.add(getQualifiedName(type));
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195
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196 for (String qualifiedName : nextInvalidTypes) {
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197 List<String> inheritedTypes = invalidTypes.get(qualifiedName);
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198 if (inheritedTypes == null) {
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199 inheritedTypes = new ArrayList<>();
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200 invalidTypes.put(qualifiedName, inheritedTypes);
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201 }
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202 inheritedTypes.add(Utils.getQualifiedName(typeData.getBoxedType()));
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203 }
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204 }
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205 }
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206
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207 private boolean isPrimitiveWrapper(TypeMirror type) {
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208 Types types = context.getEnvironment().getTypeUtils();
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209 for (TypeKind kind : TypeKind.values()) {
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210 if (!kind.isPrimitive()) {
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211 continue;
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212 }
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213 if (Utils.typeEquals(type, types.boxedClass(types.getPrimitiveType(kind)).asType())) {
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214 return true;
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215 }
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216 }
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217 return false;
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218 }
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219
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220 private void verifyMethodSignatures(TypeSystemData typeSystem) {
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221 Set<String> generatedIsMethodNames = new HashSet<>();
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222 Set<String> generatedAsMethodNames = new HashSet<>();
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223 Set<String> generatedExpectMethodNames = new HashSet<>();
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224
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225 for (TypeData typeData : typeSystem.getTypes()) {
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226 generatedIsMethodNames.add(TypeSystemCodeGenerator.isTypeMethodName(typeData));
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227 generatedAsMethodNames.add(TypeSystemCodeGenerator.asTypeMethodName(typeData));
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228 generatedExpectMethodNames.add(TypeSystemCodeGenerator.expectTypeMethodName(typeData));
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229 }
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230
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231 List<ExecutableElement> methods = ElementFilter.methodsIn(typeSystem.getTemplateType().getEnclosedElements());
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232 for (ExecutableElement method : methods) {
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233 if (method.getModifiers().contains(Modifier.PRIVATE)) {
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234 // will not conflict overridden methods
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235 continue;
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236 } else if (method.getParameters().size() != 1) {
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237 continue;
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238 }
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239 String methodName = method.getSimpleName().toString();
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240 if (generatedIsMethodNames.contains(methodName)) {
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241 verifyIsMethod(typeSystem, method);
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242 } else if (generatedAsMethodNames.contains(methodName)) {
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243 verifyAsMethod(typeSystem, method);
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244 } else if (generatedExpectMethodNames.contains(methodName)) {
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245 verifyExpectMethod(typeSystem);
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246 }
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247 }
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248 }
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249
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250 private boolean verifyIsMethod(TypeSystemData typeSystem, ExecutableElement method) {
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251 AnnotationMirror mirror = Utils.findAnnotationMirror(processingEnv, method, TypeCheck.class);
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252 if (mirror == null) {
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253 typeSystem.addError("Method starting with the pattern is${typeName} must be annotated with @%s.", TypeCheck.class.getSimpleName());
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254 return false;
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255 }
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256 return true;
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257 }
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258
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259 private boolean verifyAsMethod(TypeSystemData typeSystem, ExecutableElement method) {
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260 AnnotationMirror mirror = Utils.findAnnotationMirror(processingEnv, method, TypeCast.class);
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261 if (mirror == null) {
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262 typeSystem.addError("Method starting with the pattern as${typeName} must be annotated with @%s.", TypeCast.class.getSimpleName());
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263 return false;
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264 }
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265 return true;
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266 }
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267
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268 private static boolean verifyExpectMethod(TypeSystemData typeSystem) {
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269 typeSystem.addError("Method starting with the pattern expect${typeName} must not be declared manually.");
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270 return false;
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271 }
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272
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273 private static void verifyNamesUnique(TypeSystemData typeSystem) {
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274 List<TypeData> types = typeSystem.getTypes();
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275 for (int i = 0; i < types.size(); i++) {
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276 for (int j = i + 1; j < types.size(); j++) {
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277 String name1 = Utils.getSimpleName(types.get(i).getBoxedType());
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278 String name2 = Utils.getSimpleName(types.get(j).getBoxedType());
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279 if (name1.equalsIgnoreCase(name2)) {
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280 typeSystem.addError("Two types result in the same name: %s, %s.", name1, name2);
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281 }
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282 }
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283 }
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284 }
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285 }