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A Symbol Solver for Java, built on top of JavaParser (core)
/*
* 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.Node;
import com.github.javaparser.symbolsolver.core.resolution.Context;
import com.github.javaparser.symbolsolver.javaparsermodel.LambdaArgumentTypePlaceholder;
import com.github.javaparser.symbolsolver.logic.AbstractClassDeclaration;
import com.github.javaparser.symbolsolver.model.declarations.*;
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.resolution.UnsolvedSymbolException;
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.resolution.MethodResolutionLogic;
import javassist.CtClass;
import javassist.CtField;
import javassist.CtMethod;
import javassist.NotFoundException;
import javassist.bytecode.AccessFlag;
import javassist.bytecode.BadBytecode;
import javassist.bytecode.SignatureAttribute;
import javassist.bytecode.SyntheticAttribute;
import java.lang.reflect.Modifier;
import java.util.*;
import java.util.function.Predicate;
import java.util.stream.Collectors;
/**
* @author Federico Tomassetti
*/
public class JavassistClassDeclaration extends AbstractClassDeclaration {
private CtClass ctClass;
private TypeSolver typeSolver;
private JavassistTypeDeclarationAdapter javassistTypeDeclarationAdapter;
public JavassistClassDeclaration(CtClass ctClass, TypeSolver typeSolver) {
if (ctClass == null) {
throw new IllegalArgumentException();
}
if (ctClass.isInterface() || ctClass.isAnnotation() || ctClass.isPrimitive() || ctClass.isEnum()) {
throw new IllegalArgumentException("Trying to instantiate a JavassistClassDeclaration with something which is not a class: " + ctClass.toString());
}
this.ctClass = ctClass;
this.typeSolver = typeSolver;
this.javassistTypeDeclarationAdapter = new JavassistTypeDeclarationAdapter(ctClass, typeSolver);
}
@Override
protected ReferenceType object() {
return new ReferenceTypeImpl(typeSolver.solveType(Object.class.getCanonicalName()), typeSolver);
}
@Override
public boolean hasDirectlyAnnotation(String canonicalName) {
throw new UnsupportedOperationException();
}
@Override
public Set getDeclaredMethods() {
return javassistTypeDeclarationAdapter.getDeclaredMethods();
}
@Override
public boolean isAssignableBy(ReferenceTypeDeclaration other) {
return isAssignableBy(new ReferenceTypeImpl(other, typeSolver));
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
JavassistClassDeclaration that = (JavassistClassDeclaration) o;
if (!ctClass.equals(that.ctClass)) return false;
return true;
}
@Override
public int hashCode() {
return ctClass.hashCode();
}
@Override
public String getPackageName() {
return ctClass.getPackageName();
}
@Override
public String getClassName() {
String className = ctClass.getName().replace('$', '.');
if (getPackageName() != null) {
return className.substring(getPackageName().length() + 1, className.length());
}
return className;
}
@Override
public String getQualifiedName() {
return ctClass.getName().replace('$', '.');
}
public Optional solveMethodAsUsage(String name, List argumentsTypes, TypeSolver typeSolver,
Context invokationContext, List typeParameterValues) {
return JavassistUtils.getMethodUsage(ctClass, name, argumentsTypes, typeSolver, invokationContext);
}
@Deprecated
public SymbolReference solveSymbol(String name, TypeSolver typeSolver) {
for (CtField field : ctClass.getDeclaredFields()) {
if (field.getName().equals(name)) {
return SymbolReference.solved(new JavassistFieldDeclaration(field, typeSolver));
}
}
try {
CtClass superClass = ctClass.getSuperclass();
if (superClass != null) {
SymbolReference ref = new JavassistClassDeclaration(superClass, typeSolver).solveSymbol(name, typeSolver);
if (ref.isSolved()) {
return ref;
}
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
try {
for (CtClass interfaze : ctClass.getInterfaces()) {
SymbolReference ref = new JavassistInterfaceDeclaration(interfaze, typeSolver).solveSymbol(name, typeSolver);
if (ref.isSolved()) {
return ref;
}
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
return SymbolReference.unsolved(ValueDeclaration.class);
}
@Override
public List getAncestors() {
List ancestors = new LinkedList<>();
if (getSuperClass() != null) {
ancestors.add(getSuperClass());
}
ancestors.addAll(getInterfaces());
return ancestors;
}
@Deprecated
public SymbolReference solveMethod(String name, List argumentsTypes, boolean staticOnly) {
List candidates = new ArrayList<>();
Predicate staticOnlyCheck = m -> !staticOnly || (staticOnly && Modifier.isStatic(m.getModifiers()));
for (CtMethod method : ctClass.getDeclaredMethods()) {
boolean isSynthetic = method.getMethodInfo().getAttribute(SyntheticAttribute.tag) != null;
boolean isNotBridge = (method.getMethodInfo().getAccessFlags() & AccessFlag.BRIDGE) == 0;
if (method.getName().equals(name) && !isSynthetic && isNotBridge && staticOnlyCheck.test(method)) {
candidates.add(new JavassistMethodDeclaration(method, typeSolver));
}
}
try {
CtClass superClass = ctClass.getSuperclass();
if (superClass != null) {
SymbolReference ref = new JavassistClassDeclaration(superClass, typeSolver).solveMethod(name, argumentsTypes, staticOnly);
if (ref.isSolved()) {
candidates.add(ref.getCorrespondingDeclaration());
}
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
try {
for (CtClass interfaze : ctClass.getInterfaces()) {
SymbolReference ref = new JavassistInterfaceDeclaration(interfaze, typeSolver).solveMethod(name, argumentsTypes, staticOnly);
if (ref.isSolved()) {
candidates.add(ref.getCorrespondingDeclaration());
}
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
return MethodResolutionLogic.findMostApplicable(candidates, name, argumentsTypes, typeSolver);
}
public Type getUsage(Node node) {
return new ReferenceTypeImpl(this, typeSolver);
}
@Override
public boolean isAssignableBy(Type type) {
if (type.isNull()) {
return true;
}
if (type instanceof LambdaArgumentTypePlaceholder) {
return isFunctionalInterface();
}
// TODO look into generics
if (type.describe().equals(this.getQualifiedName())) {
return true;
}
try {
if (this.ctClass.getSuperclass() != null
&& new JavassistClassDeclaration(this.ctClass.getSuperclass(), typeSolver).isAssignableBy(type)) {
return true;
}
for (CtClass interfaze : ctClass.getInterfaces()) {
if (new JavassistInterfaceDeclaration(interfaze, typeSolver).isAssignableBy(type)) {
return true;
}
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
return false;
}
@Override
public boolean isTypeParameter() {
return false;
}
@Override
public List getAllFields() {
return javassistTypeDeclarationAdapter.getDeclaredFields();
}
@Override
public String getName() {
return ctClass.getSimpleName();
}
@Override
public boolean isField() {
return false;
}
@Override
public boolean isParameter() {
return false;
}
@Override
public boolean isType() {
return true;
}
@Override
public boolean isClass() {
return !ctClass.isInterface();
}
@Override
public ReferenceType getSuperClass() {
try {
if (ctClass.getSuperclass() == null) {
return new ReferenceTypeImpl(typeSolver.solveType(Object.class.getCanonicalName()), typeSolver);
}
if (ctClass.getGenericSignature() == null) {
return new ReferenceTypeImpl(new JavassistClassDeclaration(ctClass.getSuperclass(), typeSolver), typeSolver);
}
SignatureAttribute.ClassSignature classSignature = SignatureAttribute.toClassSignature(ctClass.getGenericSignature());
return JavassistUtils.signatureTypeToType(classSignature.getSuperClass(), typeSolver, this).asReferenceType();
} catch (NotFoundException e) {
throw new RuntimeException(e);
} catch (BadBytecode e) {
throw new RuntimeException(e);
}
}
@Override
public List getInterfaces() {
try {
if (ctClass.getGenericSignature() == null) {
return Arrays.stream(ctClass.getInterfaces())
.map(i -> new JavassistInterfaceDeclaration(i, typeSolver))
.map(i -> new ReferenceTypeImpl(i, typeSolver))
.collect(Collectors.toList());
} else {
SignatureAttribute.ClassSignature classSignature = SignatureAttribute.toClassSignature(ctClass.getGenericSignature());
return Arrays.stream(classSignature.getInterfaces())
.map(i -> JavassistUtils.signatureTypeToType(i, typeSolver, this).asReferenceType())
.collect(Collectors.toList());
}
} catch (NotFoundException e) {
throw new RuntimeException(e);
} catch (BadBytecode e) {
throw new RuntimeException(e);
}
}
@Override
public boolean isInterface() {
return ctClass.isInterface();
}
@Override
public String toString() {
return "JavassistClassDeclaration {" + ctClass.getName() + '}';
}
@Override
public List getTypeParameters() {
return javassistTypeDeclarationAdapter.getTypeParameters();
}
@Override
public AccessLevel accessLevel() {
return JavassistFactory.modifiersToAccessLevel(ctClass.getModifiers());
}
@Override
public List getConstructors() {
return javassistTypeDeclarationAdapter.getConstructors();
}
@Override
public Optional containerType() {
return javassistTypeDeclarationAdapter.containerType();
}
@Override
public Set internalTypes() {
try {
/*
Get all internal types of the current class and get their corresponding ReferenceTypeDeclaration.
Finally, return them in a Set.
*/
return Arrays.stream(ctClass.getDeclaredClasses()).map(itype -> JavassistFactory.toTypeDeclaration(itype, typeSolver)).collect(Collectors.toSet());
} catch (NotFoundException e) {
throw new RuntimeException(e);
}
}
@Override
public ReferenceTypeDeclaration getInternalType(String name) {
/*
The name of the ReferenceTypeDeclaration could be composed of the internal class and the outer class, e.g. A$B. That's why we search the internal type in the ending part.
In case the name is composed of the internal type only, i.e. f.getName() returns B, it will also works.
*/
Optional type =
this.internalTypes().stream().filter(f -> f.getName().endsWith(name)).findFirst();
return type.orElseThrow(() ->
new UnsolvedSymbolException("Internal type not found: " + name));
}
@Override
public boolean hasInternalType(String name) {
/*
The name of the ReferenceTypeDeclaration could be composed of the internal class and the outer class, e.g. A$B. That's why we search the internal type in the ending part.
In case the name is composed of the internal type only, i.e. f.getName() returns B, it will also works.
*/
return this.internalTypes().stream().anyMatch(f -> f.getName().endsWith(name));
}
}