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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/parser/MethodSpecParser.java @ 19289:62c43fcf5be2

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Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
author Christian Humer <christian.humer@gmail.com>
date Tue, 03 Feb 2015 15:07:07 +0100
parents 08aa0372dad4
children 18c0f02fa4d2
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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.parser;
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24
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25 import static com.oracle.truffle.dsl.processor.java.ElementUtils.*;
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26
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27 import java.util.*;
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28
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29 import javax.lang.model.element.*;
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30 import javax.lang.model.type.*;
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31
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32 import com.oracle.truffle.dsl.processor.java.*;
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33 import com.oracle.truffle.dsl.processor.java.model.*;
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34 import com.oracle.truffle.dsl.processor.model.*;
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35
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36 public final class MethodSpecParser {
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37
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38 private boolean emitErrors = true;
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39 private boolean useVarArgs = false;
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40
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41 private final Template template;
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42
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43 public MethodSpecParser(Template template) {
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44 this.template = template;
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45 }
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46
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47 public Template getTemplate() {
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48 return template;
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49 }
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50
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51 public TypeSystemData getTypeSystem() {
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52 return template.getTypeSystem();
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53 }
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54
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55 public boolean isEmitErrors() {
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56 return emitErrors;
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57 }
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58
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59 public boolean isUseVarArgs() {
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60 return useVarArgs;
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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 void setUseVarArgs(boolean useVarArgs) {
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68 this.useVarArgs = useVarArgs;
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69 }
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70
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71 public TemplateMethod parse(MethodSpec methodSpecification, ExecutableElement method, AnnotationMirror annotation, int naturalOrder) {
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72 if (methodSpecification == null) {
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73 return null;
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74 }
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75
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76 methodSpecification.applyTypeDefinitions("types");
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77
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78 String id = method.getSimpleName().toString();
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79 TypeMirror returnType = method.getReturnType();
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80 return parseImpl(methodSpecification, naturalOrder, id, method, annotation, returnType, method.getParameters());
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81 }
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82
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83 public TemplateMethod parseImpl(MethodSpec methodSpecification, int naturalOrder, String id, ExecutableElement method, AnnotationMirror annotation, TypeMirror returnType,
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84 List<? extends VariableElement> parameterTypes) {
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85 ParameterSpec returnTypeSpec = methodSpecification.getReturnType();
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86 Parameter returnTypeMirror = matchParameter(returnTypeSpec, new CodeVariableElement(returnType, "returnType"), -1, -1);
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87 if (returnTypeMirror == null) {
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88 if (emitErrors) {
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89 TemplateMethod invalidMethod = new TemplateMethod(id, naturalOrder, template, methodSpecification, method, annotation, returnTypeMirror, Collections.<Parameter> emptyList());
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90 String expectedReturnType = returnTypeSpec.toSignatureString(true);
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91 String actualReturnType = ElementUtils.getSimpleName(returnType);
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92
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93 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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94 methodSpecification.toSignatureString(method.getSimpleName().toString()));
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95 invalidMethod.addError(message);
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96 return invalidMethod;
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97 } else {
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98 return null;
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99 }
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100 }
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101
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102 List<Parameter> parameters = parseParameters(methodSpecification, parameterTypes, isUseVarArgs() && method != null ? method.isVarArgs() : false);
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103 if (parameters == null) {
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104 if (isEmitErrors() && method != null) {
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105 TemplateMethod invalidMethod = new TemplateMethod(id, naturalOrder, template, methodSpecification, method, annotation, returnTypeMirror, Collections.<Parameter> emptyList());
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106 String message = String.format("Method signature %s does not match to the expected signature: \n%s", createActualSignature(method),
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107 methodSpecification.toSignatureString(method.getSimpleName().toString()));
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108 invalidMethod.addError(message);
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109 return invalidMethod;
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110 } else {
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111 return null;
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112 }
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113 }
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114
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115 return new TemplateMethod(id, naturalOrder, template, methodSpecification, method, annotation, returnTypeMirror, parameters);
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116 }
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117
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118 private static String createActualSignature(ExecutableElement method) {
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119 StringBuilder b = new StringBuilder("(");
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120 String sep = "";
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121 if (method != null) {
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122 for (VariableElement var : method.getParameters()) {
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123 b.append(sep);
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124 b.append(ElementUtils.getSimpleName(var.asType()));
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125 sep = ", ";
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126 }
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127 }
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128 b.append(")");
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129 return b.toString();
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130 }
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131
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132 /*
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133 * Parameter parsing tries to parse required arguments starting from offset 0 with increasing
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134 * offset until it finds a signature end that matches the required specification. If there is no
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135 * end matching the required arguments, parsing fails. Parameters prior to the parsed required
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136 * ones are cut and used to parse the optional parameters.
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137 */
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138 private List<Parameter> parseParameters(MethodSpec spec, List<? extends VariableElement> parameterTypes, boolean varArgs) {
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139 List<Parameter> parsedRequired = null;
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140 int offset = 0;
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141 for (; offset <= parameterTypes.size(); offset++) {
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142 List<VariableElement> parameters = new ArrayList<>();
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143 parameters.addAll(parameterTypes.subList(offset, parameterTypes.size()));
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144 parsedRequired = parseParametersRequired(spec, parameters, varArgs);
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diff changeset
145 if (parsedRequired != null) {
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146 break;
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147 }
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148 }
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149
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150 if (parsedRequired == null) {
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151 return null;
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152 }
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153
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154 if (parsedRequired.isEmpty() && offset == 0) {
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155 offset = parameterTypes.size();
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156 }
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157 List<? extends VariableElement> potentialOptionals = parameterTypes.subList(0, offset);
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158 List<Parameter> parsedOptionals = parseParametersOptional(spec, potentialOptionals);
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159 if (parsedOptionals == null) {
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160 return null;
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161 }
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162
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163 List<Parameter> finalParameters = new ArrayList<>();
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164 finalParameters.addAll(parsedOptionals);
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165 finalParameters.addAll(parsedRequired);
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166 return finalParameters;
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167 }
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168
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169 private List<Parameter> parseParametersOptional(MethodSpec spec, List<? extends VariableElement> types) {
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170 List<Parameter> parsedParams = new ArrayList<>();
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171
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172 int typeStartIndex = 0;
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173 List<ParameterSpec> specifications = spec.getOptional();
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174 outer: for (int specIndex = 0; specIndex < specifications.size(); specIndex++) {
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175 ParameterSpec specification = specifications.get(specIndex);
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176 for (int typeIndex = typeStartIndex; typeIndex < types.size(); typeIndex++) {
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177 VariableElement variable = types.get(typeIndex);
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178 Parameter optionalParam = matchParameter(specification, variable, -1, -1);
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179 if (optionalParam != null) {
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diff changeset
180 parsedParams.add(optionalParam);
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181 typeStartIndex = typeIndex + 1;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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182 continue outer;
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183 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
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184 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
185 }
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parents:
diff changeset
186
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
187 if (typeStartIndex < types.size()) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
188 // not enough types found
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diff changeset
189 return null;
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diff changeset
190 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
191 return parsedParams;
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diff changeset
192 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
193
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194 private List<Parameter> parseParametersRequired(MethodSpec spec, List<VariableElement> types, boolean typeVarArgs) {
16851
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195 List<Parameter> parsedParams = new ArrayList<>();
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196 List<ParameterSpec> specifications = spec.getRequired();
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
197 boolean specVarArgs = spec.isVariableRequiredParameters();
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
198 int typeIndex = 0;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
199 int specificationIndex = 0;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
200
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
201 ParameterSpec specification;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
202 while ((specification = nextSpecification(specifications, specificationIndex, specVarArgs)) != null) {
19289
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diff changeset
203 VariableElement actualType = nextActualType(types, typeIndex, typeVarArgs);
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diff changeset
204 if (actualType == null) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
205 if (spec.isIgnoreAdditionalSpecifications()) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
206 break;
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parents:
diff changeset
207 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
208 return null;
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parents:
diff changeset
209 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
210
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
211 int typeVarArgsIndex = typeVarArgs ? typeIndex - types.size() + 1 : -1;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
212 int specVarArgsIndex = specVarArgs ? specificationIndex - specifications.size() + 1 : -1;
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diff changeset
213
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
214 if (typeVarArgsIndex >= 0 && specVarArgsIndex >= 0) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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diff changeset
215 // both specifications and types have a variable number of arguments
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
216 // we would get into an endless loop if we would continue
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
217 break;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
218 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
219
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
220 Parameter resolvedParameter = matchParameter(specification, actualType, specVarArgsIndex, typeVarArgsIndex);
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
221 if (resolvedParameter == null) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
222 return null;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
223 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
224 parsedParams.add(resolvedParameter);
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
225 typeIndex++;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
226 specificationIndex++;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
227 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
228
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diff changeset
229 // consume randomly ordered annotated parameters
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diff changeset
230 VariableElement variable;
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
231 while ((variable = nextActualType(types, typeIndex, typeVarArgs)) != null) {
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
232 Parameter matchedParamter = matchAnnotatedParameter(spec, variable);
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
233 if (matchedParamter == null) {
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
234 break;
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
235 }
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
236 parsedParams.add(matchedParamter);
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
237 typeIndex++;
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
238 }
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
239
16851
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
240 if (typeIndex < types.size()) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
241 if (spec.isIgnoreAdditionalParameters()) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
242 return parsedParams;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
243 } else {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
244 return null;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
245 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
246 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
247
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
248 return parsedParams;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
249 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
250
19289
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diff changeset
251 private Parameter matchAnnotatedParameter(MethodSpec spec, VariableElement variable) {
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
252 for (ParameterSpec parameterSpec : spec.getAnnotations()) {
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
253 if (parameterSpec.matches(variable)) {
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
254 Parameter matchedParameter = matchParameter(parameterSpec, variable, -1, -1);
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
255 if (matchedParameter != null) {
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
256 matchedParameter.setLocalName(variable.getSimpleName().toString());
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
257 return matchedParameter;
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
258 }
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
259 }
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
260 }
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
261 return null;
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
262 }
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
263
16851
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
264 private static ParameterSpec nextSpecification(List<ParameterSpec> specifications, int specIndex, boolean varArgs) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
265 if (varArgs && specIndex >= specifications.size() - 1 && !specifications.isEmpty()) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
266 return specifications.get(specifications.size() - 1);
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
267 } else if (specIndex < specifications.size()) {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
268 return specifications.get(specIndex);
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
269 } else {
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
270 return null;
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
271 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
272 }
2db61eddcb97 Truffle-DSL: argument syntax support for guards
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parents:
diff changeset
273
19289
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diff changeset
274 private static VariableElement nextActualType(List<VariableElement> types, int typeIndex, boolean varArgs) {
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275 if (varArgs && typeIndex >= types.size() - 1 && !types.isEmpty()) {
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276 // unpack varargs array argument
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277 VariableElement actualType = types.get(types.size() - 1);
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278 if (actualType.asType().getKind() == TypeKind.ARRAY) {
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279 actualType = new CodeVariableElement(((ArrayType) actualType.asType()).getComponentType(), actualType.getSimpleName().toString());
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280 }
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281 return actualType;
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282 } else if (typeIndex < types.size()) {
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283 return types.get(typeIndex);
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284 } else {
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285 return null;
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286 }
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287 }
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288
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289 private Parameter matchParameter(ParameterSpec specification, VariableElement variable, int specificationIndex, int varArgsIndex) {
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290 TypeMirror resolvedType = variable.asType();
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291 if (hasError(resolvedType)) {
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292 return null;
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293 }
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294
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295 if (!specification.matches(variable)) {
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296 return null;
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297 }
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298
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299 TypeData resolvedTypeData = getTypeSystem().findTypeData(resolvedType);
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300 if (resolvedTypeData != null) {
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301 return new Parameter(specification, resolvedTypeData, variable, specificationIndex, varArgsIndex);
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302 } else {
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303 return new Parameter(specification, variable, specificationIndex, varArgsIndex);
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304 }
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305 }
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306
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307 }