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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.reflectionmodel;
import com.github.javaparser.symbolsolver.core.resolution.Context;
import com.github.javaparser.symbolsolver.model.declarations.MethodDeclaration;
import com.github.javaparser.symbolsolver.model.declarations.ReferenceTypeDeclaration;
import com.github.javaparser.symbolsolver.model.declarations.TypeParameterDeclaration;
import com.github.javaparser.symbolsolver.model.methods.MethodUsage;
import com.github.javaparser.symbolsolver.model.resolution.SymbolReference;
import com.github.javaparser.symbolsolver.model.resolution.TypeSolver;
import com.github.javaparser.symbolsolver.model.typesystem.ReferenceType;
import com.github.javaparser.symbolsolver.model.typesystem.ReferenceTypeImpl;
import com.github.javaparser.symbolsolver.model.typesystem.Type;
import com.github.javaparser.symbolsolver.model.typesystem.TypeVariable;
import com.github.javaparser.symbolsolver.resolution.MethodResolutionLogic;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Collectors;
/**
* @author Federico Tomassetti
*/
class ReflectionMethodResolutionLogic {
static SymbolReference<MethodDeclaration> solveMethod(String name, List<Type> parameterTypes, boolean staticOnly,
TypeSolver typeSolver, ReferenceTypeDeclaration scopeType,
Class clazz){
List<MethodDeclaration> methods = new ArrayList<>();
Predicate<Method> staticOnlyCheck = m -> !staticOnly || (staticOnly && Modifier.isStatic(m.getModifiers()));
for (Method method : clazz.getMethods()) {
if (method.isBridge() || method.isSynthetic() || !method.getName().equals(name)|| !staticOnlyCheck.test(method)) continue;
MethodDeclaration methodDeclaration = new ReflectionMethodDeclaration(method, typeSolver);
methods.add(methodDeclaration);
}
for (ReferenceType ancestor : scopeType.getAncestors()) {
SymbolReference<MethodDeclaration> ref = MethodResolutionLogic.solveMethodInType(ancestor.getTypeDeclaration(), name, parameterTypes, staticOnly, typeSolver);
if (ref.isSolved()) {
methods.add(ref.getCorrespondingDeclaration());
}
}
if (scopeType.getAncestors().isEmpty()){
ReferenceTypeImpl objectClass = new ReferenceTypeImpl(new ReflectionClassDeclaration(Object.class, typeSolver), typeSolver);
SymbolReference<MethodDeclaration> ref = MethodResolutionLogic.solveMethodInType(objectClass.getTypeDeclaration(), name, parameterTypes, staticOnly, typeSolver);
if (ref.isSolved()) {
methods.add(ref.getCorrespondingDeclaration());
}
}
return MethodResolutionLogic.findMostApplicable(methods, name, parameterTypes, typeSolver);
}
static Optional<MethodUsage> solveMethodAsUsage(String name, List<Type> argumentsTypes, TypeSolver typeSolver,
Context invokationContext, List<Type> typeParameterValues,
ReferenceTypeDeclaration scopeType, Class clazz) {
if (typeParameterValues.size() != scopeType.getTypeParameters().size()) {
// if it is zero we are going to ignore them
if (!scopeType.getTypeParameters().isEmpty()) {
// Parameters not specified, so default to Object
typeParameterValues = new ArrayList<>();
for (int i = 0; i < scopeType.getTypeParameters().size(); i++) {
typeParameterValues.add(new ReferenceTypeImpl(new ReflectionClassDeclaration(Object.class, typeSolver), typeSolver));
}
}
}
List<MethodUsage> methods = new ArrayList<>();
for (Method method : clazz.getMethods()) {
if (method.getName().equals(name) && !method.isBridge() && !method.isSynthetic()) {
MethodDeclaration methodDeclaration = new ReflectionMethodDeclaration(method, typeSolver);
MethodUsage methodUsage = replaceParams(typeParameterValues, scopeType, methodDeclaration);
methods.add(methodUsage);
}
}
for(ReferenceType ancestor : scopeType.getAncestors()){
SymbolReference<MethodDeclaration> ref = MethodResolutionLogic.solveMethodInType(ancestor.getTypeDeclaration(), name, argumentsTypes, typeSolver);
if (ref.isSolved()){
MethodDeclaration correspondingDeclaration = ref.getCorrespondingDeclaration();
MethodUsage methodUsage = replaceParams(typeParameterValues, ancestor.getTypeDeclaration(), correspondingDeclaration);
methods.add(methodUsage);
}
}
if (scopeType.getAncestors().isEmpty()){
ReferenceTypeImpl objectClass = new ReferenceTypeImpl(new ReflectionClassDeclaration(Object.class, typeSolver), typeSolver);
SymbolReference<MethodDeclaration> ref = MethodResolutionLogic.solveMethodInType(objectClass.getTypeDeclaration(), name, argumentsTypes, typeSolver);
if (ref.isSolved()) {
MethodUsage usage = replaceParams(typeParameterValues, objectClass.getTypeDeclaration(), ref.getCorrespondingDeclaration());
methods.add(usage);
}
}
final List<Type> finalTypeParameterValues = typeParameterValues;
argumentsTypes = argumentsTypes.stream().map((pt) -> {
int i = 0;
for (TypeParameterDeclaration tp : scopeType.getTypeParameters()) {
pt = pt.replaceTypeVariables(tp, finalTypeParameterValues.get(i));
i++;
}
return pt;
}).collect(Collectors.toList());
return MethodResolutionLogic.findMostApplicableUsage(methods, name, argumentsTypes, typeSolver);
}
private static MethodUsage replaceParams(List<Type> typeParameterValues, ReferenceTypeDeclaration typeParametrizable, MethodDeclaration methodDeclaration) {
MethodUsage methodUsage = new MethodUsage(methodDeclaration);
int i = 0;
// Only replace if we have enough values provided
if (typeParameterValues.size() == typeParametrizable.getTypeParameters().size()){
for (TypeParameterDeclaration tp : typeParametrizable.getTypeParameters()) {
methodUsage = methodUsage.replaceTypeParameter(tp, typeParameterValues.get(i));
i++;
}
}
for (TypeParameterDeclaration methodTypeParameter : methodDeclaration.getTypeParameters()) {
methodUsage = methodUsage.replaceTypeParameter(methodTypeParameter, new TypeVariable(methodTypeParameter));
}
return methodUsage;
}
}
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