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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/template/TemplateMethodParser.java @ 11180:a9cb98ff8fd9

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Truffle-DSL: Fixed compile error for nodes with no children and empty constructor.
author Christian Humer <christian.humer@gmail.com>
date Mon, 29 Jul 2013 16:50:10 +0200
parents 79041ab43660
children 89febfdb81d2
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.dsl.processor.template;
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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.node.NodeChildData.*;
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37 import com.oracle.truffle.dsl.processor.typesystem.*;
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39 public abstract class TemplateMethodParser<T extends Template, E extends TemplateMethod> {
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41 private final ProcessorContext context;
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43 protected final T template;
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45 private boolean emitErrors = true;
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46 private boolean parseNullOnError = true;
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47
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48 public TemplateMethodParser(ProcessorContext context, T template) {
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49 this.template = template;
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50 this.context = context;
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51 }
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53 public boolean isEmitErrors() {
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54 return emitErrors;
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55 }
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57 public void setParseNullOnError(boolean nullOnError) {
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58 this.parseNullOnError = nullOnError;
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59 }
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61 public boolean isParseNullOnError() {
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62 return parseNullOnError;
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63 }
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64
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65 public void setEmitErrors(boolean emitErrors) {
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66 this.emitErrors = emitErrors;
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67 }
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68
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69 public ProcessorContext getContext() {
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70 return context;
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71 }
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73 public TypeSystemData getTypeSystem() {
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74 return template.getTypeSystem();
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75 }
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76
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77 public abstract MethodSpec createSpecification(ExecutableElement method, AnnotationMirror mirror);
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78
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79 public abstract E create(TemplateMethod method);
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81 public abstract boolean isParsable(ExecutableElement method);
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83 public Class<? extends Annotation> getAnnotationType() {
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84 return null;
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85 }
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87 public final List<E> parse(List<? extends Element> elements) {
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88 List<ExecutableElement> methods = new ArrayList<>();
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89 methods.addAll(ElementFilter.methodsIn(elements));
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91 List<E> parsedMethods = new ArrayList<>();
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92 boolean valid = true;
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93 for (ExecutableElement method : methods) {
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94 if (!isParsable(method)) {
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95 continue;
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96 }
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97
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98 Class<? extends Annotation> annotationType = getAnnotationType();
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99 AnnotationMirror mirror = null;
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100 if (annotationType != null) {
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101 mirror = Utils.findAnnotationMirror(getContext().getEnvironment(), method, annotationType);
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102 }
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104 E parsedMethod = parse(method, mirror);
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105
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106 if (method.getModifiers().contains(Modifier.PRIVATE) && emitErrors) {
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107 parsedMethod.addError("Method must not be private.");
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108 valid = false;
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109 continue;
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110 }
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111
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112 if (parsedMethod != null) {
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113 parsedMethods.add(parsedMethod);
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114 } else {
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115 valid = false;
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116 }
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117 }
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118 Collections.sort(parsedMethods);
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119
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120 if (!valid && parseNullOnError) {
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121 return null;
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122 }
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123 return parsedMethods;
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124 }
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125
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126 private E parse(ExecutableElement method, AnnotationMirror annotation) {
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127 MethodSpec methodSpecification = createSpecification(method, annotation);
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128 if (methodSpecification == null) {
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129 return null;
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130 }
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131
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132 methodSpecification.applyTypeDefinitions("types");
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133
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134 String id = method.getSimpleName().toString();
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135 AnnotationMirror idAnnotation = Utils.findAnnotationMirror(context.getEnvironment(), method, NodeId.class);
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136 if (idAnnotation != null) {
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137 id = Utils.getAnnotationValue(String.class, idAnnotation, "value");
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138 }
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139
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140 ParameterSpec returnTypeSpec = methodSpecification.getReturnType();
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141
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142 ActualParameter returnTypeMirror = matchParameter(returnTypeSpec, method.getReturnType(), template, 0, false);
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143 if (returnTypeMirror == null) {
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144 if (emitErrors) {
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145 E invalidMethod = create(new TemplateMethod(id, template, methodSpecification, method, annotation, returnTypeMirror, Collections.<ActualParameter> emptyList()));
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146 String expectedReturnType = returnTypeSpec.toSignatureString(true);
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147 String actualReturnType = Utils.getSimpleName(method.getReturnType());
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148
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149 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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150 methodSpecification.toSignatureString(method.getSimpleName().toString()));
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151 invalidMethod.addError(message);
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152 return invalidMethod;
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153 } else {
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154 return null;
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155 }
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156 }
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157
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158 List<TypeMirror> parameterTypes = new ArrayList<>();
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159 for (VariableElement var : method.getParameters()) {
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160 parameterTypes.add(var.asType());
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161 }
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162
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163 List<ActualParameter> parameters = parseParameters(methodSpecification, parameterTypes);
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164 if (parameters == null) {
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165 if (isEmitErrors()) {
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166 E invalidMethod = create(new TemplateMethod(id, template, methodSpecification, method, annotation, returnTypeMirror, Collections.<ActualParameter> emptyList()));
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167 String message = String.format("Method signature %s does not match to the expected signature: \n%s", createActualSignature(methodSpecification, method),
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168 methodSpecification.toSignatureString(method.getSimpleName().toString()));
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169 invalidMethod.addError(message);
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170 return invalidMethod;
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171 } else {
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172 return null;
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173 }
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174 }
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175
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176 return create(new TemplateMethod(id, template, methodSpecification, method, annotation, returnTypeMirror, parameters));
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177 }
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178
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179 private static String createActualSignature(MethodSpec spec, ExecutableElement method) {
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180 StringBuilder b = new StringBuilder("(");
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181 String sep = "";
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182 for (TypeMirror implicitType : spec.getImplicitRequiredTypes()) {
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183 b.append(sep);
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184 b.append("implicit " + Utils.getSimpleName(implicitType));
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185 sep = ", ";
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186 }
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187 for (VariableElement var : method.getParameters()) {
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188 b.append(sep);
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189 b.append(Utils.getSimpleName(var.asType()));
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190 sep = ", ";
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191 }
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192 b.append(")");
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193 return b.toString();
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194 }
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195
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196 private List<ActualParameter> parseParameters(MethodSpec spec, List<TypeMirror> parameterTypes) {
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197 List<ActualParameter> parsedParams = new ArrayList<>();
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198 ConsumableListIterator<TypeMirror> types = new ConsumableListIterator<>(parameterTypes);
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199
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200 // parse optional parameters
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201 ConsumableListIterator<ParameterSpec> optionals = new ConsumableListIterator<>(spec.getOptional());
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202 for (TypeMirror type : types) {
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203 int oldIndex = types.getIndex();
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204 int optionalCount = 1;
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205 for (ParameterSpec paramspec : optionals) {
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206 ActualParameter optionalParam = matchParameter(paramspec, type, template, 0, false);
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207 if (optionalParam != null) {
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208 optionals.consume(optionalCount);
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209 types.consume();
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210 parsedParams.add(optionalParam);
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211 break;
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212 }
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213 optionalCount++;
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214 }
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215 if (oldIndex == types.getIndex()) {
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216 // nothing found anymore skip optional
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217 break;
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218 }
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219 }
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220
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221 List<TypeMirror> typesWithImplicit = new ArrayList<>(spec.getImplicitRequiredTypes());
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222 typesWithImplicit.addAll(types.toList());
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223 types = new ConsumableListIterator<>(typesWithImplicit);
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224
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225 int specificationParameterIndex = 0;
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226 ConsumableListIterator<ParameterSpec> required = new ConsumableListIterator<>(spec.getRequired());
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227 while (required.get() != null || types.get() != null) {
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228 if (required.get() == null || types.get() == null) {
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229 if (required.get() != null && required.get().getCardinality() == Cardinality.MANY) {
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230 required.consume();
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231 specificationParameterIndex = 0;
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232 continue;
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233 }
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234 break;
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235 }
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236 boolean implicit = types.getIndex() < spec.getImplicitRequiredTypes().size();
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237 ActualParameter resolvedParameter = matchParameter(required.get(), types.get(), template, specificationParameterIndex, implicit);
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238 if (resolvedParameter == null) {
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239 if (required.get().getCardinality() == Cardinality.MANY) {
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240 required.consume();
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241 continue;
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242 }
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243 // direct mismatch but required -> error
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244 return null;
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245 } else {
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246 parsedParams.add(resolvedParameter);
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247 types.consume();
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248 if (required.get().getCardinality() == Cardinality.ONE) {
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249 required.consume();
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250 specificationParameterIndex = 0;
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251 } else if (required.get().getCardinality() == Cardinality.MANY) {
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252 specificationParameterIndex++;
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253 }
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254 }
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255 }
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256
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257 if (!types.toList().isEmpty()) {
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258 // additional types -> error
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259 return null;
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260 }
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261
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262 if (!required.toList().isEmpty() && !spec.isVariableRequiredArguments()) {
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263 // additional specifications -> error
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264 return null;
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265 }
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266
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267 // success!
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268 return parsedParams;
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269 }
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270
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271 private ActualParameter matchParameter(ParameterSpec specification, TypeMirror mirror, Template originalTemplate, int index, boolean implicit) {
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272 TypeMirror resolvedType = mirror;
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273 if (hasError(resolvedType)) {
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274 resolvedType = context.resolveNotYetCompiledType(mirror, originalTemplate);
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275 }
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276
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277 if (!specification.matches(resolvedType)) {
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278 return null;
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279 }
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280
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281 TypeData resolvedTypeData = getTypeSystem().findTypeData(resolvedType);
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282 if (resolvedTypeData != null) {
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283 return new ActualParameter(specification, resolvedTypeData, index, implicit);
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284 } else {
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285 return new ActualParameter(specification, resolvedType, index, implicit);
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286 }
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287 }
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288
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289 /* Helper class for parsing. */
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290 private static class ConsumableListIterator<E> implements Iterable<E> {
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291
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292 private final List<E> data;
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293 private int index;
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294
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295 public ConsumableListIterator(List<E> data) {
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296 this.data = data;
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297 }
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298
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299 public E get() {
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300 if (index >= data.size()) {
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301 return null;
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302 }
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303 return data.get(index);
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304 }
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305
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306 public E consume() {
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307 return consume(1);
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308 }
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309
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310 public E consume(int count) {
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diff changeset
311 if (index + count <= data.size()) {
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312 index += count;
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313 return get();
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diff changeset
314 } else {
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diff changeset
315 throw new ArrayIndexOutOfBoundsException(count + 1);
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316 }
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317 }
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318
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319 public int getIndex() {
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320 return index;
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321 }
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322
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323 @Override
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324 public Iterator<E> iterator() {
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325 return toList().iterator();
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326 }
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327
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328 public List<E> toList() {
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329 if (index < data.size()) {
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330 return data.subList(index, data.size());
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331 } else {
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332 return Collections.<E> emptyList();
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333 }
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334 }
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335
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336 }
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337
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338 }