Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/parser/MethodSpecParser.java @ 18775:a069a87b9a02
Truffle-DSL: Added tests and verification of overridable generic execute methods.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 05 Jan 2015 01:31:08 +0100 |
parents | 2db61eddcb97 |
children | 08aa0372dad4 |
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/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.truffle.dsl.processor.parser; import static com.oracle.truffle.dsl.processor.java.ElementUtils.*; import java.util.*; import javax.lang.model.element.*; import javax.lang.model.type.*; import com.oracle.truffle.dsl.processor.java.*; import com.oracle.truffle.dsl.processor.model.*; public final class MethodSpecParser { private boolean emitErrors = true; private boolean useVarArgs = false; private final Template template; public MethodSpecParser(Template template) { this.template = template; } public Template getTemplate() { return template; } public TypeSystemData getTypeSystem() { return template.getTypeSystem(); } public boolean isEmitErrors() { return emitErrors; } public boolean isUseVarArgs() { return useVarArgs; } public void setEmitErrors(boolean emitErrors) { this.emitErrors = emitErrors; } public void setUseVarArgs(boolean useVarArgs) { this.useVarArgs = useVarArgs; } public TemplateMethod parse(MethodSpec methodSpecification, ExecutableElement method, AnnotationMirror annotation, int naturalOrder) { if (methodSpecification == null) { return null; } methodSpecification.applyTypeDefinitions("types"); String id = method.getSimpleName().toString(); TypeMirror returnType = method.getReturnType(); List<TypeMirror> parameterTypes = new ArrayList<>(); for (VariableElement var : method.getParameters()) { parameterTypes.add(var.asType()); } return parseImpl(methodSpecification, naturalOrder, id, method, annotation, returnType, parameterTypes); } public TemplateMethod parseImpl(MethodSpec methodSpecification, int naturalOrder, String id, ExecutableElement method, AnnotationMirror annotation, TypeMirror returnType, List<TypeMirror> parameterTypes) { ParameterSpec returnTypeSpec = methodSpecification.getReturnType(); Parameter returnTypeMirror = matchParameter(returnTypeSpec, returnType, -1, -1); if (returnTypeMirror == null) { if (emitErrors) { TemplateMethod invalidMethod = new TemplateMethod(id, naturalOrder, template, methodSpecification, method, annotation, returnTypeMirror, Collections.<Parameter> emptyList()); String expectedReturnType = returnTypeSpec.toSignatureString(true); String actualReturnType = ElementUtils.getSimpleName(returnType); String message = String.format("The provided return type \"%s\" does not match expected return type \"%s\".\nExpected signature: \n %s", actualReturnType, expectedReturnType, methodSpecification.toSignatureString(method.getSimpleName().toString())); invalidMethod.addError(message); return invalidMethod; } else { return null; } } List<Parameter> parameters = parseParameters(methodSpecification, parameterTypes, isUseVarArgs() && method != null ? method.isVarArgs() : false); if (parameters == null) { if (isEmitErrors() && method != null) { TemplateMethod invalidMethod = new TemplateMethod(id, naturalOrder, template, methodSpecification, method, annotation, returnTypeMirror, Collections.<Parameter> emptyList()); String message = String.format("Method signature %s does not match to the expected signature: \n%s", createActualSignature(method), methodSpecification.toSignatureString(method.getSimpleName().toString())); invalidMethod.addError(message); return invalidMethod; } else { return null; } } return new TemplateMethod(id, naturalOrder, template, methodSpecification, method, annotation, returnTypeMirror, parameters); } private static String createActualSignature(ExecutableElement method) { StringBuilder b = new StringBuilder("("); String sep = ""; if (method != null) { for (VariableElement var : method.getParameters()) { b.append(sep); b.append(ElementUtils.getSimpleName(var.asType())); sep = ", "; } } b.append(")"); return b.toString(); } /* * Parameter parsing tries to parse required arguments starting from offset 0 with increasing * offset until it finds a signature end that matches the required specification. If there is no * end matching the required arguments, parsing fails. Parameters prior to the parsed required * ones are cut and used to parse the optional parameters. */ private List<Parameter> parseParameters(MethodSpec spec, List<TypeMirror> parameterTypes, boolean varArgs) { List<Parameter> parsedRequired = null; int offset = 0; for (; offset <= parameterTypes.size(); offset++) { List<TypeMirror> parameters = new ArrayList<>(); parameters.addAll(parameterTypes.subList(offset, parameterTypes.size())); parsedRequired = parseParametersRequired(spec, parameters, varArgs); if (parsedRequired != null) { break; } } if (parsedRequired == null) { return null; } if (parsedRequired.isEmpty() && offset == 0) { offset = parameterTypes.size(); } List<TypeMirror> potentialOptionals = parameterTypes.subList(0, offset); List<Parameter> parsedOptionals = parseParametersOptional(spec, potentialOptionals); if (parsedOptionals == null) { return null; } List<Parameter> finalParameters = new ArrayList<>(); finalParameters.addAll(parsedOptionals); finalParameters.addAll(parsedRequired); return finalParameters; } private List<Parameter> parseParametersOptional(MethodSpec spec, List<TypeMirror> types) { List<Parameter> parsedParams = new ArrayList<>(); int typeStartIndex = 0; List<ParameterSpec> specifications = spec.getOptional(); outer: for (int specIndex = 0; specIndex < specifications.size(); specIndex++) { ParameterSpec specification = specifications.get(specIndex); for (int typeIndex = typeStartIndex; typeIndex < types.size(); typeIndex++) { TypeMirror actualType = types.get(typeIndex); Parameter optionalParam = matchParameter(specification, actualType, -1, -1); if (optionalParam != null) { parsedParams.add(optionalParam); typeStartIndex = typeIndex + 1; continue outer; } } } if (typeStartIndex < types.size()) { // not enough types found return null; } return parsedParams; } private List<Parameter> parseParametersRequired(MethodSpec spec, List<TypeMirror> types, boolean typeVarArgs) { List<Parameter> parsedParams = new ArrayList<>(); List<ParameterSpec> specifications = spec.getRequired(); boolean specVarArgs = spec.isVariableRequiredParameters(); int typeIndex = 0; int specificationIndex = 0; ParameterSpec specification; while ((specification = nextSpecification(specifications, specificationIndex, specVarArgs)) != null) { TypeMirror actualType = nextActualType(types, typeIndex, typeVarArgs); if (actualType == null) { if (spec.isIgnoreAdditionalSpecifications()) { break; } return null; } int typeVarArgsIndex = typeVarArgs ? typeIndex - types.size() + 1 : -1; int specVarArgsIndex = specVarArgs ? specificationIndex - specifications.size() + 1 : -1; if (typeVarArgsIndex >= 0 && specVarArgsIndex >= 0) { // both specifications and types have a variable number of arguments // we would get into an endless loop if we would continue break; } Parameter resolvedParameter = matchParameter(specification, actualType, specVarArgsIndex, typeVarArgsIndex); if (resolvedParameter == null) { return null; } parsedParams.add(resolvedParameter); typeIndex++; specificationIndex++; } if (typeIndex < types.size()) { // additional types available if (spec.isIgnoreAdditionalParameters()) { return parsedParams; } else { return null; } } return parsedParams; } private static ParameterSpec nextSpecification(List<ParameterSpec> specifications, int specIndex, boolean varArgs) { if (varArgs && specIndex >= specifications.size() - 1 && !specifications.isEmpty()) { return specifications.get(specifications.size() - 1); } else if (specIndex < specifications.size()) { return specifications.get(specIndex); } else { return null; } } private static TypeMirror nextActualType(List<TypeMirror> types, int typeIndex, boolean varArgs) { if (varArgs && typeIndex >= types.size() - 1 && !types.isEmpty()) { // unpack varargs array argument TypeMirror actualType = types.get(types.size() - 1); if (actualType.getKind() == TypeKind.ARRAY) { actualType = ((ArrayType) actualType).getComponentType(); } return actualType; } else if (typeIndex < types.size()) { return types.get(typeIndex); } else { return null; } } private Parameter matchParameter(ParameterSpec specification, TypeMirror mirror, int specificationIndex, int varArgsIndex) { TypeMirror resolvedType = mirror; if (hasError(resolvedType)) { return null; } if (!specification.matches(resolvedType)) { return null; } TypeData resolvedTypeData = getTypeSystem().findTypeData(resolvedType); if (resolvedTypeData != null) { return new Parameter(specification, resolvedTypeData, specificationIndex, varArgsIndex); } else { return new Parameter(specification, resolvedType, specificationIndex, varArgsIndex); } } }