Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/template/TemplateMethodParser.java @ 11758:4ac92e735a16
pylint fixes (retry)
author | Mick Jordan <mick.jordan@oracle.com> |
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date | Mon, 23 Sep 2013 21:57:44 -0700 |
parents | 43eab069ca9b |
children | 2b9fcffd6f36 |
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.dsl.processor.template; |
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24 |
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25 import static com.oracle.truffle.dsl.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.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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38 |
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39 public abstract class TemplateMethodParser<T extends Template, E extends TemplateMethod> { |
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40 |
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41 private final ProcessorContext context; |
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42 |
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43 protected final T template; |
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44 |
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45 private boolean emitErrors = true; |
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46 private boolean parseNullOnError = false; |
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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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52 |
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53 public boolean isEmitErrors() { |
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54 return emitErrors; |
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55 } |
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56 |
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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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60 |
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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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72 |
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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, boolean invalid); |
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80 |
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81 public abstract boolean isParsable(ExecutableElement method); |
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82 |
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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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86 |
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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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90 |
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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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103 |
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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 annotated with @%s must not be private.", getAnnotationType().getSimpleName()); |
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108 parsedMethods.add(parsedMethod); |
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109 valid = false; |
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110 continue; |
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111 } |
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112 |
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113 if (parsedMethod != null) { |
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114 parsedMethods.add(parsedMethod); |
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115 } else { |
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116 valid = false; |
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117 } |
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118 } |
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119 Collections.sort(parsedMethods); |
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120 |
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121 if (!valid && parseNullOnError) { |
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122 return null; |
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123 } |
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124 return parsedMethods; |
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125 } |
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126 |
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127 private E parse(ExecutableElement method, AnnotationMirror annotation) { |
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128 MethodSpec methodSpecification = createSpecification(method, annotation); |
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129 if (methodSpecification == null) { |
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130 return null; |
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131 } |
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132 |
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133 methodSpecification.applyTypeDefinitions("types"); |
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134 |
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135 String id = method.getSimpleName().toString(); |
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136 AnnotationMirror idAnnotation = Utils.findAnnotationMirror(context.getEnvironment(), method, NodeId.class); |
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137 if (idAnnotation != null) { |
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138 id = Utils.getAnnotationValue(String.class, idAnnotation, "value"); |
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139 } |
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140 |
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141 ParameterSpec returnTypeSpec = methodSpecification.getReturnType(); |
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142 |
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143 ActualParameter returnTypeMirror = matchParameter(returnTypeSpec, method.getReturnType(), template, 0, false); |
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144 if (returnTypeMirror == null) { |
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145 if (emitErrors) { |
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146 E invalidMethod = create(new TemplateMethod(id, template, methodSpecification, method, annotation, returnTypeMirror, Collections.<ActualParameter> emptyList()), true); |
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147 String expectedReturnType = returnTypeSpec.toSignatureString(true); |
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148 String actualReturnType = Utils.getSimpleName(method.getReturnType()); |
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149 |
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150 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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151 methodSpecification.toSignatureString(method.getSimpleName().toString())); |
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152 invalidMethod.addError(message); |
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153 return invalidMethod; |
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154 } else { |
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155 return null; |
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156 } |
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157 } |
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158 |
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159 List<TypeMirror> parameterTypes = new ArrayList<>(); |
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160 for (VariableElement var : method.getParameters()) { |
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161 parameterTypes.add(var.asType()); |
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162 } |
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163 |
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164 List<ActualParameter> parameters = parseParameters(methodSpecification, parameterTypes); |
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165 if (parameters == null) { |
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166 if (isEmitErrors()) { |
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167 E invalidMethod = create(new TemplateMethod(id, template, methodSpecification, method, annotation, returnTypeMirror, Collections.<ActualParameter> emptyList()), true); |
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168 String message = String.format("Method signature %s does not match to the expected signature: \n%s", createActualSignature(methodSpecification, method), |
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169 methodSpecification.toSignatureString(method.getSimpleName().toString())); |
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170 invalidMethod.addError(message); |
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171 return invalidMethod; |
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172 } else { |
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173 return null; |
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174 } |
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175 } |
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176 |
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177 return create(new TemplateMethod(id, template, methodSpecification, method, annotation, returnTypeMirror, parameters), false); |
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178 } |
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179 |
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180 private static String createActualSignature(MethodSpec spec, ExecutableElement method) { |
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181 StringBuilder b = new StringBuilder("("); |
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182 String sep = ""; |
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183 for (TypeMirror implicitType : spec.getImplicitRequiredTypes()) { |
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184 b.append(sep); |
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185 b.append("implicit " + Utils.getSimpleName(implicitType)); |
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186 sep = ", "; |
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187 } |
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188 for (VariableElement var : method.getParameters()) { |
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189 b.append(sep); |
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190 b.append(Utils.getSimpleName(var.asType())); |
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191 sep = ", "; |
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192 } |
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193 b.append(")"); |
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194 return b.toString(); |
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195 } |
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196 |
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197 /* |
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198 * Parameter parsing tries to parse required arguments starting from offset 0 with increasing |
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199 * offset until it finds a signature end that matches the required specification. If there is no |
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200 * end matching the required arguments, parsing fails. Parameters prior to the parsed required |
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201 * ones are cut and used to parse the optional parameters. All those remaining parameters must |
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202 * be consumed otherwise its an error. |
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203 */ |
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204 private List<ActualParameter> parseParameters(MethodSpec spec, List<TypeMirror> parameterTypes) { |
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205 List<TypeMirror> implicitTypes = spec.getImplicitRequiredTypes(); |
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206 |
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207 int offset = -1; |
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208 List<ActualParameter> parsedRequired = null; |
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209 ConsumableListIterator<TypeMirror> types = null; |
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210 while (parsedRequired == null && offset < parameterTypes.size()) { |
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211 offset++; |
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212 types = new ConsumableListIterator<>(new ArrayList<>(implicitTypes)); |
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213 types.data.addAll(parameterTypes.subList(offset, parameterTypes.size())); |
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214 parsedRequired = parseParametersRequired(spec, types); |
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215 } |
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216 |
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217 if (parsedRequired == null && offset >= 0) { |
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218 return null; |
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219 } |
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220 |
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221 List<TypeMirror> potentialOptionals; |
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222 if (offset == -1) { |
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223 potentialOptionals = parameterTypes; |
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224 } else { |
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225 potentialOptionals = parameterTypes.subList(0, offset); |
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226 } |
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227 types = new ConsumableListIterator<>(potentialOptionals); |
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228 List<ActualParameter> parsedOptionals = parseParametersOptional(spec, types); |
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229 if (parsedOptionals == null) { |
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230 return null; |
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231 } |
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232 |
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233 List<ActualParameter> finalParameters = new ArrayList<>(); |
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234 finalParameters.addAll(parsedOptionals); |
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235 finalParameters.addAll(parsedRequired); |
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236 return finalParameters; |
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237 } |
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238 |
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239 private List<ActualParameter> parseParametersOptional(MethodSpec spec, ConsumableListIterator<TypeMirror> types) { |
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240 List<ActualParameter> parsedParams = new ArrayList<>(); |
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241 // parse optional parameters |
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242 ConsumableListIterator<ParameterSpec> optionals = new ConsumableListIterator<>(spec.getOptional()); |
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243 for (TypeMirror type : types) { |
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244 int oldIndex = types.getIndex(); |
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245 int optionalCount = 1; |
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246 for (ParameterSpec paramspec : optionals) { |
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247 ActualParameter optionalParam = matchParameter(paramspec, type, template, 0, false); |
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248 if (optionalParam != null) { |
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249 optionals.consume(optionalCount); |
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250 types.consume(); |
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251 parsedParams.add(optionalParam); |
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252 break; |
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253 } |
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254 optionalCount++; |
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255 } |
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256 if (oldIndex == types.getIndex()) { |
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257 // nothing found anymore skip optional |
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258 break; |
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259 } |
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260 } |
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261 if (types.getIndex() <= types.data.size() - 1) { |
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262 return null; |
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263 } |
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264 return parsedParams; |
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265 } |
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266 |
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267 private List<ActualParameter> parseParametersRequired(MethodSpec spec, ConsumableListIterator<TypeMirror> types) { |
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268 List<ActualParameter> parsedParams = new ArrayList<>(); |
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269 |
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270 int specificationParameterIndex = 0; |
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271 ConsumableListIterator<ParameterSpec> required = new ConsumableListIterator<>(spec.getRequired()); |
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272 while (required.get() != null || types.get() != null) { |
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273 if (required.get() == null || types.get() == null) { |
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274 if (required.get() != null && required.get().getCardinality() == Cardinality.MANY) { |
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275 required.consume(); |
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276 specificationParameterIndex = 0; |
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277 continue; |
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278 } |
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279 break; |
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280 } |
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281 boolean implicit = types.getIndex() < spec.getImplicitRequiredTypes().size(); |
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282 ActualParameter resolvedParameter = matchParameter(required.get(), types.get(), template, specificationParameterIndex, implicit); |
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283 if (resolvedParameter == null) { |
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284 if (required.get().getCardinality() == Cardinality.MANY) { |
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285 required.consume(); |
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286 continue; |
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287 } |
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288 // direct mismatch but required -> error |
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289 return null; |
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290 } else { |
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291 parsedParams.add(resolvedParameter); |
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292 types.consume(); |
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293 if (required.get().getCardinality() == Cardinality.ONE) { |
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294 required.consume(); |
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295 specificationParameterIndex = 0; |
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296 } else if (required.get().getCardinality() == Cardinality.MANY) { |
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297 specificationParameterIndex++; |
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298 } |
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299 } |
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300 } |
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301 |
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302 if (!types.toList().isEmpty()) { |
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303 // additional types -> error |
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304 return null; |
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305 } |
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306 |
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307 if (!required.toList().isEmpty() && !spec.isVariableRequiredArguments()) { |
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308 // additional specifications -> error |
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309 return null; |
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310 } |
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311 return parsedParams; |
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312 } |
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313 |
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314 private ActualParameter matchParameter(ParameterSpec specification, TypeMirror mirror, Template originalTemplate, int index, boolean implicit) { |
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315 TypeMirror resolvedType = mirror; |
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316 if (hasError(resolvedType)) { |
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317 resolvedType = context.resolveNotYetCompiledType(mirror, originalTemplate); |
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318 } |
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319 |
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320 if (!specification.matches(resolvedType)) { |
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321 return null; |
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322 } |
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323 |
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324 TypeData resolvedTypeData = getTypeSystem().findTypeData(resolvedType); |
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325 if (resolvedTypeData != null) { |
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326 return new ActualParameter(specification, resolvedTypeData, index, implicit); |
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327 } else { |
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328 return new ActualParameter(specification, resolvedType, index, implicit); |
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329 } |
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330 } |
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331 |
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332 /* Helper class for parsing. */ |
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333 private static class ConsumableListIterator<E> implements Iterable<E> { |
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334 |
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335 private final List<E> data; |
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336 private int index; |
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337 |
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338 public ConsumableListIterator(List<E> data) { |
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339 this.data = data; |
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340 } |
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341 |
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342 public E get() { |
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343 if (index >= data.size()) { |
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344 return null; |
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345 } |
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346 return data.get(index); |
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347 } |
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348 |
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349 public E consume() { |
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350 return consume(1); |
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351 } |
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352 |
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353 public E consume(int count) { |
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354 if (index + count <= data.size()) { |
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355 index += count; |
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356 return get(); |
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357 } else { |
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358 throw new ArrayIndexOutOfBoundsException(count + 1); |
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359 } |
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360 } |
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361 |
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362 public int getIndex() { |
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363 return index; |
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364 } |
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365 |
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366 @Override |
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367 public Iterator<E> iterator() { |
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368 return toList().iterator(); |
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369 } |
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370 |
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371 public List<E> toList() { |
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372 if (index < data.size()) { |
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373 return data.subList(index, data.size()); |
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374 } else { |
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375 return Collections.<E> emptyList(); |
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376 } |
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377 } |
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378 |
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379 } |
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380 |
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381 } |