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annotate graal/com.oracle.truffle.codegen.processor/src/com/oracle/truffle/codegen/processor/template/TemplateMethodParser.java @ 7530:5e3d1a68664e

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applied mx eclipseformat to all Java files
author Doug Simon <doug.simon@oracle.com>
date Wed, 23 Jan 2013 16:34:57 +0100
parents 6343a09b2ec1
children 5f3cba05c2fa
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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25 import static com.oracle.truffle.codegen.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.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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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 ParameterSpec returnTypeSpec = methodSpecification.getReturnType();
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124 List<ParameterSpec> parameterSpecs = new ArrayList<>();
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125 parameterSpecs.addAll(methodSpecification.getParameters());
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126
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127 ActualParameter returnTypeMirror = resolveTypeMirror(returnTypeSpec, method.getReturnType(), template);
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128 if (returnTypeMirror == null) {
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129 if (isEmitErrors()) {
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130 String expectedReturnType = createTypeSignature(returnTypeSpec, true);
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131 String actualReturnType = Utils.getSimpleName(method.getReturnType());
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132
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133 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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134 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs));
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135
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136 context.getLog().error(method, annotation, message);
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137 }
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138 return null;
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139 }
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140
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141 Iterator<? extends VariableElement> variableIterator = method.getParameters().iterator();
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142 Iterator<? extends ParameterSpec> specificationIterator = parameterSpecs.iterator();
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143
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144 List<ActualParameter> resolvedMirrors = new ArrayList<>();
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145 VariableElement parameter = null;
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146 ParameterSpec specification = null;
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147 while (specificationIterator.hasNext() || specification != null) {
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148 if (specification == null) {
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149 specification = specificationIterator.next();
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150 }
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151
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152 if (parameter == null && variableIterator.hasNext()) {
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153 parameter = variableIterator.next();
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154 }
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155
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156 if (parameter == null) {
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157 if (specification.getCardinality() == Cardinality.MULTIPLE) {
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158 specification = null;
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159 continue;
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160 } else if (!specification.isOptional()) {
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161 if (isEmitErrors()) {
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162 // non option type specification found -> argument missing
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163 String expectedType = createTypeSignature(specification, false);
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164
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165 String message = String.format("Missing argument \"%s\".\nExpected signature: \n %s", expectedType,
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166 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs));
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167
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168 context.getLog().error(method, message);
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169 }
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170 return null;
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171 } else {
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172 // specification is optional -> continue
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173 specification = null;
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174 continue;
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175 }
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176 }
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177
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178 ActualParameter resolvedMirror = resolveTypeMirror(specification, parameter.asType(), template);
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179
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180 if (resolvedMirror == null) {
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181 if (specification.isOptional()) {
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182 specification = null;
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183 continue;
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184 }
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185
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186 if (isEmitErrors()) {
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187 String expectedReturnType = createTypeSignature(specification, false);
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188 String actualReturnType = Utils.getSimpleName(parameter.asType()) + " " + parameter.getSimpleName();
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189
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190 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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191 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs));
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192
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193 context.getLog().error(parameter, message);
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194 }
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195 return null;
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196 }
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197
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198 resolvedMirrors.add(resolvedMirror);
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199 parameter = null; // consume parameter
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200
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201 if (specification.getCardinality() != Cardinality.MULTIPLE) {
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202 specification = null;
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203 }
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204 }
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205
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206 if (variableIterator.hasNext()) {
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207 parameter = variableIterator.next();
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208 if (isEmitErrors()) {
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209 String actualReturnType = Utils.getSimpleName(parameter.asType()) + " " + parameter.getSimpleName();
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210 String message = String.format("No argument expected but found \"%s\".\nExpected signature: \n %s", actualReturnType,
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211 createExpectedSignature(method.getSimpleName().toString(), returnTypeSpec, parameterSpecs));
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212
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213 context.getLog().error(parameter, message);
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214 }
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215 return null;
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216 }
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217
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218 ActualParameter[] paramMirrors = resolvedMirrors.toArray(new ActualParameter[resolvedMirrors.size()]);
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219 return create(new TemplateMethod(template, methodSpecification, method, annotation, returnTypeMirror, paramMirrors));
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220 }
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221
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222 private ActualParameter resolveTypeMirror(ParameterSpec specification, TypeMirror mirror, Template typeSystem) {
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223 TypeMirror resolvedType = mirror;
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224 if (hasError(resolvedType)) {
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225 resolvedType = context.resolveNotYetCompiledType(mirror, typeSystem);
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226 }
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227
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228 if (!specification.matches(resolvedType)) {
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229 return null;
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230 }
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231 return new ActualParameter(specification, resolvedType);
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232 }
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233
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234 public static String createExpectedSignature(String methodName, ParameterSpec returnType, List<? extends ParameterSpec> parameters) {
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235 StringBuilder b = new StringBuilder();
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236
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237 b.append(" ");
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238 b.append(createTypeSignature(returnType, true));
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239
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240 b.append(" ");
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241 b.append(methodName);
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242 b.append("(");
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243
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244 for (int i = 0; i < parameters.size(); i++) {
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245 ParameterSpec specification = parameters.get(i);
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246 if (specification.isOptional()) {
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247 b.append("[");
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248 }
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249 if (specification.getCardinality() == Cardinality.MULTIPLE) {
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250 b.append("{");
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251 }
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252
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253 b.append(createTypeSignature(specification, false));
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254
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255 if (specification.isOptional()) {
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256 b.append("]");
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257 }
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258
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259 if (specification.getCardinality() == Cardinality.MULTIPLE) {
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260 b.append("}");
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261 }
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262
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263 if (i < parameters.size() - 1) {
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264 b.append(", ");
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265 }
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266
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267 }
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268
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269 b.append(")");
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270
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271 TypeMirror[] types = null;
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272
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273 // TODO allowed types may differ so different <Any> must be generated.
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274 if (returnType.getAllowedTypes().length > 1) {
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275 types = returnType.getAllowedTypes();
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276 }
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277 for (ParameterSpec param : parameters) {
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278 if (param.getAllowedTypes().length > 1) {
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279 types = param.getAllowedTypes();
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280 }
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281 }
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282 if (types != null) {
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283 b.append("\n\n ");
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284 b.append("<Any> = {");
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285 String separator = "";
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286 for (TypeMirror type : types) {
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287 b.append(separator).append(Utils.getSimpleName(type));
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288 separator = ", ";
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289 }
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290 b.append("}");
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291 }
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292 return b.toString();
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293 }
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294
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295 private static String createTypeSignature(ParameterSpec spec, boolean typeOnly) {
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296 StringBuilder builder = new StringBuilder();
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297 if (spec.getAllowedTypes().length > 1) {
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298 builder.append("<Any>");
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299 } else if (spec.getAllowedTypes().length == 1) {
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300 builder.append(Utils.getSimpleName(spec.getAllowedTypes()[0]));
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301 } else {
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302 builder.append("void");
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303 }
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304 if (!typeOnly) {
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305 builder.append(" ");
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306 builder.append(spec.getName());
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307 }
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308 return builder.toString();
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309 }
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310
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311 }