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/*
* Copyright 2016 Federico Tomassetti
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.javaparser.symbolsolver.javassistmodel;
import com.github.javaparser.resolution.MethodUsage;
import com.github.javaparser.resolution.UnsolvedSymbolException;
import com.github.javaparser.resolution.declarations.ResolvedReferenceTypeDeclaration;
import com.github.javaparser.resolution.declarations.ResolvedTypeParameterDeclaration;
import com.github.javaparser.resolution.declarations.ResolvedTypeParametrizable;
import com.github.javaparser.resolution.types.*;
import com.github.javaparser.symbolsolver.core.resolution.Context;
import com.github.javaparser.symbolsolver.model.resolution.TypeSolver;
import com.github.javaparser.symbolsolver.model.typesystem.*;
import com.github.javaparser.symbolsolver.resolution.SymbolSolver;
import javassist.CtClass;
import javassist.CtMethod;
import javassist.NotFoundException;
import javassist.bytecode.BadBytecode;
import javassist.bytecode.SignatureAttribute;
import java.util.*;
import java.util.stream.Collectors;
/**
* @author Federico Tomassetti
*/
class JavassistUtils {
static Optional<MethodUsage> getMethodUsage(CtClass ctClass, String name, List<ResolvedType> argumentsTypes, TypeSolver typeSolver, Context invokationContext) {
// TODO avoid bridge and synthetic methods
for (CtMethod method : ctClass.getDeclaredMethods()) {
if (method.getName().equals(name)) {
// TODO check typeParametersValues
MethodUsage methodUsage = new MethodUsage(new JavassistMethodDeclaration(method, typeSolver));
if (argumentsTypes.size() < methodUsage.getNoParams()) {
// this method cannot be a good candidate (except if variadic ?)
continue;
}
try {
if (method.getGenericSignature() != null) {
SignatureAttribute.MethodSignature methodSignature = SignatureAttribute.toMethodSignature(method.getGenericSignature());
List<ResolvedType> parametersOfReturnType = parseTypeParameters(methodSignature.getReturnType().toString(), typeSolver, invokationContext);
ResolvedType newReturnType = methodUsage.returnType();
// consume one parametersOfReturnType at the time
if (newReturnType.isReferenceType() && parametersOfReturnType.size() > 0) {
newReturnType = newReturnType.asReferenceType().transformTypeParameters(tp -> parametersOfReturnType.remove(0));
}
methodUsage = methodUsage.replaceReturnType(newReturnType);
}
return Optional.of(methodUsage);
} catch (BadBytecode e) {
throw new RuntimeException(e);
}
}
}
try {
CtClass superClass = ctClass.getSuperclass();
if (superClass != null) {
Optional<MethodUsage> ref = new JavassistClassDeclaration(superClass, typeSolver).solveMethodAsUsage(name, argumentsTypes, typeSolver, invokationContext, null);
if (ref.isPresent()) {
return ref;
}
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
try {
for (CtClass interfaze : ctClass.getInterfaces()) {
Optional<MethodUsage> ref = new JavassistInterfaceDeclaration(interfaze, typeSolver).solveMethodAsUsage(name, argumentsTypes, typeSolver, invokationContext, null);
if (ref.isPresent()) {
return ref;
}
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
return Optional.empty();
}
private static List<ResolvedType> parseTypeParameters(String signature, TypeSolver typeSolver, Context invokationContext) {
String originalSignature = signature;
if (signature.contains("<")) {
signature = signature.substring(signature.indexOf('<') + 1);
if (!signature.endsWith(">")) {
throw new IllegalArgumentException();
}
signature = signature.substring(0, signature.length() - 1);
if (signature.contains(",")) {
throw new UnsupportedOperationException();
}
if (signature.startsWith("?")) {
// TODO: check bounds
List<ResolvedType> types = new ArrayList<>();
types.add(ResolvedWildcard.UNBOUNDED);
return types;
}
List<ResolvedType> typeParameters = parseTypeParameters(signature, typeSolver, invokationContext);
if (signature.contains("<")) {
signature = signature.substring(0, signature.indexOf('<'));
}
if (signature.contains(">")) {
throw new UnsupportedOperationException();
}
ResolvedType type = new SymbolSolver(typeSolver).solveTypeUsage(signature, invokationContext);
if (type.isReferenceType() && typeParameters.size() > 0) {
type = type.asReferenceType().transformTypeParameters(tp -> typeParameters.remove(0));
}
List<ResolvedType> types = new ArrayList<>();
types.add(type);
return types;
} else {
return Collections.emptyList();
}
}
static ResolvedType signatureTypeToType(SignatureAttribute.Type signatureType, TypeSolver typeSolver, ResolvedTypeParametrizable typeParametrizable) {
if (signatureType instanceof SignatureAttribute.ClassType) {
SignatureAttribute.ClassType classType = (SignatureAttribute.ClassType) signatureType;
List<ResolvedType> typeArguments = classType.getTypeArguments() == null ? Collections.emptyList() : Arrays.stream(classType.getTypeArguments()).map(ta -> typeArgumentToType(ta, typeSolver, typeParametrizable)).collect(Collectors.toList());
final String typeName =
classType.getDeclaringClass() != null ?
classType.getDeclaringClass().getName() + "." + classType.getName() :
classType.getName();
ResolvedReferenceTypeDeclaration typeDeclaration = typeSolver.solveType(
removeTypeArguments(internalNameToCanonicalName(typeName)));
return new ReferenceTypeImpl(typeDeclaration, typeArguments, typeSolver);
} else if (signatureType instanceof SignatureAttribute.TypeVariable) {
SignatureAttribute.TypeVariable typeVariableSignature = (SignatureAttribute.TypeVariable)signatureType;
Optional<ResolvedTypeParameterDeclaration> typeParameterDeclarationOpt = typeParametrizable.findTypeParameter(typeVariableSignature.getName());
if (!typeParameterDeclarationOpt.isPresent()) {
throw new UnsolvedSymbolException("Unable to solve TypeVariable " + typeVariableSignature);
}
ResolvedTypeParameterDeclaration typeParameterDeclaration = typeParameterDeclarationOpt.get();
return new ResolvedTypeVariable(typeParameterDeclaration);
} else if (signatureType instanceof SignatureAttribute.ArrayType) {
SignatureAttribute.ArrayType arrayType = (SignatureAttribute.ArrayType) signatureType;
return new ResolvedArrayType(signatureTypeToType(arrayType.getComponentType(), typeSolver, typeParametrizable));
} else if (signatureType instanceof SignatureAttribute.BaseType) {
SignatureAttribute.BaseType baseType = (SignatureAttribute.BaseType) signatureType;
if (baseType.toString().equals("void")) {
return ResolvedVoidType.INSTANCE;
} else {
return ResolvedPrimitiveType.byName(baseType.toString());
}
} else {
throw new RuntimeException(signatureType.getClass().getCanonicalName());
}
}
private static String removeTypeArguments(String typeName) {
if (typeName.contains("<")) {
return typeName.substring(0, typeName.indexOf('<'));
} else {
return typeName;
}
}
private static String internalNameToCanonicalName(String typeName) {
return typeName.replaceAll("\\$", ".");
}
private static ResolvedType objectTypeArgumentToType(SignatureAttribute.ObjectType typeArgument, TypeSolver typeSolver, ResolvedTypeParametrizable typeParametrizable) {
String typeName = typeArgument.jvmTypeName();
Optional<ResolvedType> type = getGenericParameterByName(typeName, typeParametrizable);
return type.orElseGet(() -> new ReferenceTypeImpl(
typeSolver.solveType(removeTypeArguments(internalNameToCanonicalName(typeName))),
typeSolver));
}
private static Optional<ResolvedType> getGenericParameterByName(String typeName, ResolvedTypeParametrizable typeParametrizable) {
Optional<ResolvedTypeParameterDeclaration> tp = typeParametrizable.findTypeParameter(typeName);
return tp.map(ResolvedTypeVariable::new);
}
private static ResolvedType typeArgumentToType(SignatureAttribute.TypeArgument typeArgument, TypeSolver typeSolver, ResolvedTypeParametrizable typeParametrizable) {
if (typeArgument.isWildcard()) {
if (typeArgument.getType() == null) {
return ResolvedWildcard.UNBOUNDED;
} else if (typeArgument.getKind() == '+') {
return ResolvedWildcard.extendsBound(objectTypeArgumentToType(typeArgument.getType(), typeSolver, typeParametrizable));
} else if (typeArgument.getKind() == '-') {
return ResolvedWildcard.superBound(objectTypeArgumentToType(typeArgument.getType(), typeSolver, typeParametrizable));
} else {
throw new UnsupportedOperationException();
}
} else {
return objectTypeArgumentToType(typeArgument.getType(), typeSolver, typeParametrizable);
}
}
}
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