Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.codegen.processor/src/com/oracle/truffle/codegen/processor/template/TemplateMethodParser.java @ 7679:5f3cba05c2fa
Cleanup and improved error messages.
author | Christian Humer <christian.humer@gmail.com> |
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date | Thu, 31 Jan 2013 16:21:46 +0100 |
parents | 5e3d1a68664e |
children | c17ee8823d72 |
rev | line source |
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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.codegen.processor.template; |
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24 |
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25 import static com.oracle.truffle.codegen.processor.Utils.*; |
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26 |
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27 import java.lang.annotation.*; |
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28 import java.util.*; |
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29 |
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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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33 |
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34 import com.oracle.truffle.codegen.processor.*; |
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35 import com.oracle.truffle.codegen.processor.template.ParameterSpec.Cardinality; |
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36 |
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37 public abstract class TemplateMethodParser<T extends Template, E extends TemplateMethod> { |
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38 |
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39 private final ProcessorContext context; |
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40 |
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41 protected final T template; |
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42 |
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43 private boolean emitErrors = true; |
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44 private boolean parseNullOnError = true; |
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45 |
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46 public TemplateMethodParser(ProcessorContext context, T template) { |
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47 this.template = template; |
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48 this.context = context; |
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49 } |
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50 |
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51 public boolean isEmitErrors() { |
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52 return emitErrors; |
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53 } |
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54 |
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55 public void setParseNullOnError(boolean nullOnError) { |
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56 this.parseNullOnError = nullOnError; |
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57 } |
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58 |
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59 public boolean isParseNullOnError() { |
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60 return parseNullOnError; |
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61 } |
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62 |
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63 public void setEmitErrors(boolean emitErrors) { |
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64 this.emitErrors = emitErrors; |
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65 } |
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66 |
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67 public ProcessorContext getContext() { |
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68 return context; |
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69 } |
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70 |
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71 public abstract MethodSpec createSpecification(ExecutableElement method, AnnotationMirror mirror); |
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72 |
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73 public abstract E create(TemplateMethod method); |
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74 |
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75 public abstract boolean isParsable(ExecutableElement method); |
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76 |
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77 public Class<? extends Annotation> getAnnotationType() { |
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78 return null; |
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79 } |
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80 |
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81 public final List<E> parse(List<? extends Element> elements) { |
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82 List<ExecutableElement> methods = new ArrayList<>(); |
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83 methods.addAll(ElementFilter.methodsIn(elements)); |
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84 |
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85 List<E> parsedMethods = new ArrayList<>(); |
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86 boolean valid = true; |
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87 for (ExecutableElement method : methods) { |
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88 if (!isParsable(method)) { |
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89 continue; |
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90 } |
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91 |
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92 Class<? extends Annotation> annotationType = getAnnotationType(); |
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93 AnnotationMirror mirror = null; |
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94 if (annotationType != null) { |
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95 mirror = Utils.findAnnotationMirror(getContext().getEnvironment(), method, annotationType); |
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96 } |
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97 |
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98 if (method.getModifiers().contains(Modifier.PRIVATE)) { |
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99 getContext().getLog().error(method, "Method must not be private."); |
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100 valid = false; |
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101 continue; |
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102 } |
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103 |
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104 E parsedMethod = parse(method, mirror); |
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105 if (parsedMethod != null) { |
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106 parsedMethods.add(parsedMethod); |
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107 } else { |
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108 valid = false; |
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109 } |
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110 } |
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111 if (!valid && parseNullOnError) { |
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112 return null; |
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113 } |
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114 return parsedMethods; |
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115 } |
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116 |
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117 private E parse(ExecutableElement method, AnnotationMirror annotation) { |
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118 MethodSpec methodSpecification = createSpecification(method, annotation); |
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119 if (methodSpecification == null) { |
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120 return null; |
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121 } |
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122 |
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123 List<TypeDef> typeDefs = createTypeDefinitions(methodSpecification.getReturnType(), methodSpecification.getParameters()); |
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124 |
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125 ParameterSpec returnTypeSpec = methodSpecification.getReturnType(); |
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126 List<ParameterSpec> parameterSpecs = new ArrayList<>(); |
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127 parameterSpecs.addAll(methodSpecification.getParameters()); |
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128 |
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129 ActualParameter returnTypeMirror = resolveTypeMirror(returnTypeSpec, method.getReturnType(), template); |
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130 if (returnTypeMirror == null) { |
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131 if (isEmitErrors()) { |
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132 String expectedReturnType = createTypeSignature(returnTypeSpec, typeDefs, true); |
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133 String actualReturnType = Utils.getSimpleName(method.getReturnType()); |
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134 |
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135 String message = String.format("The provided return type \"%s\" does not match expected return type \"%s\".\nExpected signature: \n %s", actualReturnType, expectedReturnType, |
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136 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs, typeDefs)); |
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137 |
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138 context.getLog().error(method, annotation, message); |
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139 } |
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140 return null; |
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141 } |
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142 |
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143 Iterator<? extends VariableElement> variableIterator = method.getParameters().iterator(); |
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144 Iterator<? extends ParameterSpec> specificationIterator = parameterSpecs.iterator(); |
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145 |
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146 List<ActualParameter> resolvedMirrors = new ArrayList<>(); |
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147 VariableElement parameter = null; |
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148 ParameterSpec specification = null; |
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149 while (specificationIterator.hasNext() || specification != null) { |
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150 if (specification == null) { |
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151 specification = specificationIterator.next(); |
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152 } |
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153 |
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154 if (parameter == null && variableIterator.hasNext()) { |
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155 parameter = variableIterator.next(); |
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156 } |
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157 |
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158 if (parameter == null) { |
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159 if (specification.getCardinality() == Cardinality.MULTIPLE) { |
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160 specification = null; |
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161 continue; |
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162 } else if (!specification.isOptional()) { |
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163 if (isEmitErrors()) { |
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164 // non option type specification found -> argument missing |
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165 String expectedType = createTypeSignature(specification, typeDefs, false); |
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166 |
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167 String message = String.format("Missing argument \"%s\".\nExpected signature: \n %s", expectedType, |
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168 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs, typeDefs)); |
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169 |
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170 context.getLog().error(method, message); |
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171 } |
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172 return null; |
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173 } else { |
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174 // specification is optional -> continue |
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175 specification = null; |
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176 continue; |
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177 } |
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178 } |
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179 |
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180 ActualParameter resolvedMirror = resolveTypeMirror(specification, parameter.asType(), template); |
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181 |
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182 if (resolvedMirror == null) { |
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183 if (specification.isOptional()) { |
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184 specification = null; |
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185 continue; |
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186 } |
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187 |
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188 if (isEmitErrors()) { |
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189 String expectedReturnType = createTypeSignature(specification, typeDefs, false); |
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190 String actualReturnType = Utils.getSimpleName(parameter.asType()) + " " + parameter.getSimpleName(); |
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191 |
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192 String message = String.format("The provided argument type \"%s\" does not match expected type \"%s\".\nExpected signature: \n %s", actualReturnType, expectedReturnType, |
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193 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs, typeDefs)); |
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194 |
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195 context.getLog().error(parameter, message); |
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196 } |
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197 return null; |
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198 } |
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199 |
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200 resolvedMirrors.add(resolvedMirror); |
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201 parameter = null; // consume parameter |
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202 |
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203 if (specification.getCardinality() != Cardinality.MULTIPLE) { |
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204 specification = null; |
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205 } |
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206 } |
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207 |
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208 if (variableIterator.hasNext()) { |
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209 parameter = variableIterator.next(); |
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210 if (isEmitErrors()) { |
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211 String actualReturnType = Utils.getSimpleName(parameter.asType()) + " " + parameter.getSimpleName(); |
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212 String message = String.format("No argument expected but found \"%s\".\nExpected signature: \n %s", actualReturnType, |
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213 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs, typeDefs)); |
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214 |
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215 context.getLog().error(parameter, message); |
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216 } |
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217 return null; |
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218 } |
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219 |
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220 ActualParameter[] paramMirrors = resolvedMirrors.toArray(new ActualParameter[resolvedMirrors.size()]); |
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221 return create(new TemplateMethod(template, methodSpecification, method, annotation, returnTypeMirror, paramMirrors)); |
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222 } |
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223 |
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224 private ActualParameter resolveTypeMirror(ParameterSpec specification, TypeMirror mirror, Template typeSystem) { |
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225 TypeMirror resolvedType = mirror; |
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226 if (hasError(resolvedType)) { |
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227 resolvedType = context.resolveNotYetCompiledType(mirror, typeSystem); |
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228 } |
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229 |
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230 if (!specification.matches(resolvedType)) { |
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231 return null; |
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232 } |
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233 return new ActualParameter(specification, resolvedType); |
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234 } |
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235 |
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236 protected static List<TypeDef> createTypeDefinitions(ParameterSpec returnType, List<? extends ParameterSpec> parameters) { |
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237 List<TypeDef> typeDefs = new ArrayList<>(); |
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238 |
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239 TypeMirror[] types = returnType.getAllowedTypes(); |
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240 List<ParameterSpec> allParams = new ArrayList<>(); |
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241 allParams.add(returnType); |
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242 allParams.addAll(parameters); |
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243 |
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244 int defIndex = 0; |
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245 for (ParameterSpec spec : allParams) { |
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246 TypeMirror[] allowedTypes = spec.getAllowedTypes(); |
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247 if (types != null && allowedTypes.length > 1) { |
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248 TypeDef foundDef = null; |
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249 for (TypeDef def : typeDefs) { |
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250 if (Arrays.equals(spec.getAllowedTypes(), def.getTypes())) { |
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251 foundDef = def; |
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252 break; |
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253 } |
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254 } |
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255 if (foundDef == null) { |
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256 foundDef = new TypeDef(types, "Types" + defIndex); |
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257 typeDefs.add(foundDef); |
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258 defIndex++; |
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259 } |
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260 |
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261 foundDef.getParameters().add(spec); |
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262 } |
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263 } |
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264 |
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265 return typeDefs; |
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266 } |
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267 |
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268 protected static class TypeDef { |
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269 |
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270 private final TypeMirror[] types; |
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271 private final String name; |
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272 private final List<ParameterSpec> parameters = new ArrayList<>(); |
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273 |
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274 public TypeDef(TypeMirror[] types, String name) { |
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275 this.types = types; |
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276 this.name = name; |
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277 } |
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278 |
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279 public List<ParameterSpec> getParameters() { |
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280 return parameters; |
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281 } |
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282 |
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283 public TypeMirror[] getTypes() { |
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284 return types; |
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285 } |
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286 |
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287 public String getName() { |
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288 return name; |
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289 } |
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290 } |
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291 |
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292 public static String createExpectedSignature(String methodName, ParameterSpec returnType, List<? extends ParameterSpec> parameters, List<TypeDef> typeDefs) { |
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293 StringBuilder b = new StringBuilder(); |
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294 |
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295 b.append(" "); |
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296 b.append(createTypeSignature(returnType, typeDefs, true)); |
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297 |
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298 b.append(" "); |
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299 b.append(methodName); |
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300 b.append("("); |
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301 |
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302 for (int i = 0; i < parameters.size(); i++) { |
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303 ParameterSpec specification = parameters.get(i); |
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304 if (specification.isOptional()) { |
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305 b.append("["); |
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306 } |
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307 if (specification.getCardinality() == Cardinality.MULTIPLE) { |
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308 b.append("{"); |
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309 } |
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310 |
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311 b.append(createTypeSignature(specification, typeDefs, false)); |
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312 |
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313 if (specification.isOptional()) { |
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314 b.append("]"); |
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315 } |
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316 |
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317 if (specification.getCardinality() == Cardinality.MULTIPLE) { |
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318 b.append("}"); |
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319 } |
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320 |
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321 if (i < parameters.size() - 1) { |
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322 b.append(", "); |
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323 } |
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324 |
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325 } |
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326 |
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327 b.append(")"); |
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328 |
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329 if (!typeDefs.isEmpty()) { |
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330 b.append("\n\n"); |
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331 |
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332 String lineSep = ""; |
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333 for (TypeDef def : typeDefs) { |
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334 b.append(lineSep); |
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335 b.append(" <").append(def.getName()).append(">"); |
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336 b.append(" = {"); |
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337 String separator = ""; |
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338 for (TypeMirror type : def.getTypes()) { |
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339 b.append(separator).append(Utils.getSimpleName(type)); |
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340 separator = ", "; |
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341 } |
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342 b.append("}"); |
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343 lineSep = "\n"; |
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344 |
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345 } |
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346 } |
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347 return b.toString(); |
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348 } |
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349 |
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350 private static String createTypeSignature(ParameterSpec spec, List<TypeDef> typeDefs, boolean typeOnly) { |
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351 StringBuilder builder = new StringBuilder(); |
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352 if (spec.getAllowedTypes().length > 1) { |
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353 TypeDef foundTypeDef = null; |
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354 for (TypeDef typeDef : typeDefs) { |
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355 if (typeDef.getParameters().contains(spec)) { |
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356 foundTypeDef = typeDef; |
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357 break; |
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358 } |
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359 } |
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360 if (foundTypeDef != null) { |
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361 builder.append("<" + foundTypeDef.getName() + ">"); |
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362 } |
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363 } else if (spec.getAllowedTypes().length == 1) { |
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364 builder.append(Utils.getSimpleName(spec.getAllowedTypes()[0])); |
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365 } else { |
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366 builder.append("void"); |
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367 } |
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368 if (!typeOnly) { |
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369 builder.append(" "); |
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370 builder.append(spec.getName()); |
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371 } |
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372 return builder.toString(); |
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373 } |
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374 |
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375 } |