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annotate graal/com.oracle.truffle.codegen.processor/src/com/oracle/truffle/codegen/processor/template/TemplateMethodParser.java @ 7291:a748e4d44694

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Truffle API to specify type-specalized Node classes; annotation processor for automatic code generation of the type-specialized Node classes during the build process
author Christian Humer <christian.humer@gmail.com>
date Fri, 21 Dec 2012 10:44:31 -0800
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children 6343a09b2ec1
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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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30 import javax.lang.model.element.*;
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31 import javax.lang.model.type.*;
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33 import com.oracle.truffle.codegen.processor.*;
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34 import com.oracle.truffle.codegen.processor.template.ParameterSpec.Cardinality;
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35
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36 public abstract class TemplateMethodParser<E extends TemplateMethod> {
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37
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38 private final ProcessorContext context;
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39
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40 public TemplateMethodParser(ProcessorContext context) {
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41 this.context = context;
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42 }
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43
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44 public ProcessorContext getContext() {
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45 return context;
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46 }
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47
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48 public abstract MethodSpec createSpecification(ExecutableElement method, AnnotationMirror mirror);
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49
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50 public abstract E create(TemplateMethod method);
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51
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52 public abstract Class<? extends Annotation> getAnnotationType();
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54 public final E parse(ExecutableElement method, AnnotationMirror annotation, Template template) {
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55 MethodSpec methodSpecification = createSpecification(method, annotation);
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56 if (methodSpecification == null) {
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57 return null;
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58 }
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59
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60 ParameterSpec returnTypeSpec = methodSpecification.getReturnType();
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61 List<ParameterSpec> parameterSpecs = new ArrayList<>();
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62 parameterSpecs.addAll(methodSpecification.getParameters());
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63
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64 ActualParameter returnTypeMirror = resolveTypeMirror(returnTypeSpec, method.getReturnType(), template);
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65 if (returnTypeMirror == null) {
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66 String expectedReturnType = createTypeSignature(returnTypeSpec, true);
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67 String actualReturnType = Utils.getSimpleName(method.getReturnType());
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68
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69 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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70 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs));
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71
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72 context.getLog().error(method, annotation, message);
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73 return null;
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74 }
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76 Iterator< ? extends VariableElement> variableIterator = method.getParameters().iterator();
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77 Iterator< ? extends ParameterSpec> specificationIterator = parameterSpecs.iterator();
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78
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79 List<ActualParameter> resolvedMirrors = new ArrayList<>();
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80 VariableElement parameter = null;
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81 ParameterSpec specification = null;
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82 while (specificationIterator.hasNext() || specification != null) {
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83 if (specification == null) {
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84 specification = specificationIterator.next();
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85 }
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86
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87 if (parameter == null && variableIterator.hasNext()) {
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88 parameter = variableIterator.next();
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89 }
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90
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91 if (parameter == null) {
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92 if (specification.getCardinality() == Cardinality.MULTIPLE) {
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93 specification = null;
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94 continue;
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95 } else if (!specification.isOptional()) {
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96 // non option type specification found -> argument missing
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97 String expectedType = createTypeSignature(specification, false);
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98
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99 String message = String.format("Missing argument \"%s\".\nExpected signature: \n %s", expectedType,
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100 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs));
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101
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102 context.getLog().error(method, message);
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103 return null;
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104 } else {
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105 // specification is optional -> continue
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106 specification = null;
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107 continue;
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108 }
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109 }
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110
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111 ActualParameter resolvedMirror = resolveTypeMirror(specification, parameter.asType(), template);
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112
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113 if (resolvedMirror == null) {
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114 if (specification.isOptional()) {
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115 specification = null;
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116 continue;
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117 }
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118
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119 String expectedReturnType = createTypeSignature(specification, false);
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120 String actualReturnType = Utils.getSimpleName(parameter.asType()) + " " + parameter.getSimpleName();
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121
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122 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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123 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs));
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124
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125 context.getLog().error(parameter, message);
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126 return null;
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127 }
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128
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129 resolvedMirrors.add(resolvedMirror);
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130 parameter = null; // consume parameter
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131
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132 if (specification.getCardinality() != Cardinality.MULTIPLE) {
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133 specification = null;
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134 }
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135 }
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136
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137 if (variableIterator.hasNext()) {
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138 parameter = variableIterator.next();
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139 String actualReturnType = Utils.getSimpleName(parameter.asType()) + " " + parameter.getSimpleName();
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140 String message = String.format("No argument expected but found \"%s\".\nExpected signature: \n %s", actualReturnType,
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141 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs));
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142
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143 context.getLog().error(parameter, message);
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144 return null;
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145 }
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146
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147 ActualParameter[] paramMirrors = resolvedMirrors.toArray(new ActualParameter[resolvedMirrors.size()]);
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148 return create(new TemplateMethod(methodSpecification, method, annotation, returnTypeMirror, paramMirrors));
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149 }
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150
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151 private ActualParameter resolveTypeMirror(ParameterSpec specification, TypeMirror mirror, Template typeSystem) {
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152 TypeMirror resolvedType = mirror;
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153 if (hasError(resolvedType)) {
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154 resolvedType = context.resolveNotYetCompiledType(mirror, typeSystem);
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155 }
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156
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157 if (!specification.matches(resolvedType)) {
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158 return null;
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159 }
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160 return new ActualParameter(specification, resolvedType);
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161 }
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162
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163 public static String createExpectedSignature(String methodName, ParameterSpec returnType, List< ? extends ParameterSpec> parameters) {
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164 StringBuilder b = new StringBuilder();
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165
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166 b.append(" ");
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167 b.append(createTypeSignature(returnType, true));
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168
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169 b.append(" ");
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170 b.append(methodName);
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171 b.append("(");
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172
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173 for (int i = 0; i < parameters.size(); i++) {
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174 ParameterSpec specification = parameters.get(i);
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175 if (specification.isOptional()) {
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176 b.append("[");
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177 }
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178 if (specification.getCardinality() == Cardinality.MULTIPLE) {
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179 b.append("{");
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180 }
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181
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182 b.append(createTypeSignature(specification, false));
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183
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184 if (specification.isOptional()) {
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185 b.append("]");
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186 }
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187
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188 if (specification.getCardinality() == Cardinality.MULTIPLE) {
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189 b.append("}");
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190 }
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191
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192 if (i < parameters.size() - 1) {
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193 b.append(", ");
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194 }
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195
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196 }
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197
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198 b.append(")");
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199
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200 TypeMirror[] types = null;
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201
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202 //TODO allowed types may differ so different <Any> must be generated.
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203 if (returnType.getAllowedTypes().length > 1) {
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204 types = returnType.getAllowedTypes();
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205 }
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206 for (ParameterSpec param : parameters) {
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207 if (param.getAllowedTypes().length > 1) {
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208 types = param.getAllowedTypes();
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209 }
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210 }
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211 if (types != null) {
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212 b.append("\n\n ");
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213 b.append("<Any> = {");
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214 String separator = "";
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215 for (TypeMirror type : types) {
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216 b.append(separator).append(Utils.getSimpleName(type));
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217 separator = ", ";
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218 }
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219 b.append("}");
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220 }
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221 return b.toString();
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222 }
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223
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224 private static String createTypeSignature(ParameterSpec spec, boolean typeOnly) {
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225 StringBuilder builder = new StringBuilder();
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226 if (spec.getAllowedTypes().length > 1) {
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227 builder.append("<Any>");
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228 } else if (spec.getAllowedTypes().length == 1) {
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229 builder.append(Utils.getSimpleName(spec.getAllowedTypes()[0]));
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230 } else {
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231 builder.append("void");
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232 }
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233 if (!typeOnly) {
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234 builder.append(" ");
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235 builder.append(spec.getName());
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236 }
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237 return builder.toString();
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238 }
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239
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240
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241 }