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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.ast.AccessSpecifier;
import com.github.javaparser.ast.Node;
import com.github.javaparser.resolution.MethodUsage;
import com.github.javaparser.resolution.declarations.ResolvedMethodDeclaration;
import com.github.javaparser.resolution.declarations.ResolvedParameterDeclaration;
import com.github.javaparser.resolution.declarations.ResolvedReferenceTypeDeclaration;
import com.github.javaparser.resolution.declarations.ResolvedTypeParameterDeclaration;
import com.github.javaparser.resolution.types.ResolvedType;
import com.github.javaparser.symbolsolver.core.resolution.Context;
import com.github.javaparser.symbolsolver.declarations.common.MethodDeclarationCommonLogic;
import com.github.javaparser.symbolsolver.model.resolution.TypeSolver;
import javassist.CtMethod;
import javassist.NotFoundException;
import javassist.bytecode.BadBytecode;
import javassist.bytecode.SignatureAttribute;
import java.lang.reflect.Modifier;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
/**
* @author Federico Tomassetti
*/
public class JavassistMethodDeclaration implements ResolvedMethodDeclaration {
private CtMethod ctMethod;
private TypeSolver typeSolver;
public JavassistMethodDeclaration(CtMethod ctMethod, TypeSolver typeSolver) {
this.ctMethod = ctMethod;
this.typeSolver = typeSolver;
}
@Override
public boolean isDefaultMethod() {
return ctMethod.getDeclaringClass().isInterface() && !isAbstract();
}
@Override
public boolean isStatic() {
return Modifier.isStatic(ctMethod.getModifiers());
}
@Override
public String toString() {
return "JavassistMethodDeclaration{" +
"ctMethod=" + ctMethod +
'}';
}
@Override
public String getName() {
return ctMethod.getName();
}
@Override
public boolean isField() {
return false;
}
@Override
public boolean isParameter() {
return false;
}
@Override
public boolean isType() {
return false;
}
@Override
public ResolvedReferenceTypeDeclaration declaringType() {
if (ctMethod.getDeclaringClass().isInterface()) {
return new JavassistInterfaceDeclaration(ctMethod.getDeclaringClass(), typeSolver);
} else {
return new JavassistClassDeclaration(ctMethod.getDeclaringClass(), typeSolver);
}
}
@Override
public ResolvedType getReturnType() {
try {
if (ctMethod.getGenericSignature() != null) {
javassist.bytecode.SignatureAttribute.Type genericSignatureType = SignatureAttribute.toMethodSignature(ctMethod.getGenericSignature()).getReturnType();
return JavassistUtils.signatureTypeToType(genericSignatureType, typeSolver, this);
} else {
return JavassistFactory.typeUsageFor(ctMethod.getReturnType(), typeSolver);
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
} catch (BadBytecode e) {
throw new RuntimeException(e);
}
}
@Override
public int getNumberOfParams() {
try {
return ctMethod.getParameterTypes().length;
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
}
@Override
public ResolvedParameterDeclaration getParam(int i) {
try {
boolean variadic = false;
if ((ctMethod.getModifiers() & javassist.Modifier.VARARGS) > 0) {
variadic = i == (ctMethod.getParameterTypes().length - 1);
}
if (ctMethod.getGenericSignature() != null) {
SignatureAttribute.MethodSignature methodSignature = SignatureAttribute.toMethodSignature(ctMethod.getGenericSignature());
SignatureAttribute.Type signatureType = methodSignature.getParameterTypes()[i];
return new JavassistParameterDeclaration(JavassistUtils.signatureTypeToType(signatureType, typeSolver, this), typeSolver, variadic);
} else {
return new JavassistParameterDeclaration(ctMethod.getParameterTypes()[i], typeSolver, variadic);
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
} catch (BadBytecode badBytecode) {
throw new RuntimeException(badBytecode);
}
}
public MethodUsage getUsage(Node node) {
throw new UnsupportedOperationException();
}
public MethodUsage resolveTypeVariables(Context context, List<ResolvedType> parameterTypes) {
return new MethodDeclarationCommonLogic(this, typeSolver).resolveTypeVariables(context, parameterTypes);
}
@Override
public boolean isAbstract() {
return Modifier.isAbstract(ctMethod.getModifiers());
}
@Override
public List<ResolvedTypeParameterDeclaration> getTypeParameters() {
try {
if (ctMethod.getGenericSignature() == null) {
return Collections.emptyList();
}
SignatureAttribute.MethodSignature methodSignature = SignatureAttribute.toMethodSignature(ctMethod.getGenericSignature());
return Arrays.stream(methodSignature.getTypeParameters()).map((jasTp) -> new JavassistTypeParameter(jasTp, this, typeSolver)).collect(Collectors.toList());
} catch (BadBytecode badBytecode) {
throw new RuntimeException(badBytecode);
}
}
@Override
public AccessSpecifier accessSpecifier() {
throw new UnsupportedOperationException();
}
@Override
public int getNumberOfSpecifiedExceptions() {
try {
return ctMethod.getExceptionTypes().length;
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
}
@Override
public ResolvedType getSpecifiedException(int index) {
if (index < 0 || index >= getNumberOfSpecifiedExceptions()) {
throw new IllegalArgumentException(String.format("No exception with index %d. Number of exceptions: %d",
index, getNumberOfSpecifiedExceptions()));
}
try {
return JavassistFactory.typeUsageFor(ctMethod.getExceptionTypes()[index], typeSolver);
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
}
}
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