javaparser-symbol-solver-core/src/main/java/com/github/javaparser/symbolsolver/javassistmodel/JavassistEnumDeclaration.java - platform/external/javaparser - Git at Google

 /*
  * 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.expr.MethodCallExpr;
 import com.github.javaparser.resolution.MethodUsage;
 import com.github.javaparser.resolution.UnsolvedSymbolException;
 import com.github.javaparser.resolution.declarations.*;
 import com.github.javaparser.resolution.types.ResolvedReferenceType;
 import com.github.javaparser.resolution.types.ResolvedType;
 import com.github.javaparser.symbolsolver.core.resolution.Context;
 import com.github.javaparser.symbolsolver.logic.AbstractTypeDeclaration;
 import com.github.javaparser.symbolsolver.model.resolution.SymbolReference;
 import com.github.javaparser.symbolsolver.model.resolution.TypeSolver;
 import com.github.javaparser.symbolsolver.resolution.MethodResolutionLogic;
 import com.github.javaparser.symbolsolver.resolution.SymbolSolver;
 import javassist.CtClass;
 import javassist.CtField;
 import javassist.CtMethod;
 import javassist.NotFoundException;
 import javassist.bytecode.AccessFlag;
 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 JavassistEnumDeclaration extends AbstractTypeDeclaration implements ResolvedEnumDeclaration {

     private CtClass ctClass;
     private TypeSolver typeSolver;
     private JavassistTypeDeclarationAdapter javassistTypeDeclarationAdapter;

     public JavassistEnumDeclaration(CtClass ctClass, TypeSolver typeSolver) {
         if (ctClass == null) {
             throw new IllegalArgumentException();
         }
         if (!ctClass.isEnum()) {
             throw new IllegalArgumentException("Trying to instantiate a JavassistEnumDeclaration with something which is not an enum: " + ctClass.toString());
         }
         this.ctClass = ctClass;
         this.typeSolver = typeSolver;
         this.javassistTypeDeclarationAdapter = new JavassistTypeDeclarationAdapter(ctClass, typeSolver);
     }

     @Override
     public AccessSpecifier accessSpecifier() {
         return JavassistFactory.modifiersToAccessLevel(ctClass.getModifiers());
     }

     @Override
     public String getPackageName() {
         return ctClass.getPackageName();
     }

     @Override
     public String getClassName() {
         String name = ctClass.getName().replace('$', '.');
         if (getPackageName() != null) {
             return name.substring(getPackageName().length() + 1, name.length());
         }
         return name;
     }

     @Override
     public String getQualifiedName() {
         return ctClass.getName().replace('$', '.');
     }

     @Override
     public List<ResolvedReferenceType> getAncestors() {
         // Direct ancestors of an enum are java.lang.Enum and interfaces
         List<ResolvedReferenceType> ancestors = new LinkedList<>();

         try {
             CtClass superClass = ctClass.getSuperclass();

             if (superClass != null) {
                 ResolvedType superClassTypeUsage = JavassistFactory.typeUsageFor(superClass, typeSolver);

                 if (superClassTypeUsage.isReferenceType()) {
                     ancestors.add(superClassTypeUsage.asReferenceType());
                 }
             }

             for (CtClass interfaze : ctClass.getInterfaces()) {
                 ResolvedType interfazeTypeUsage = JavassistFactory.typeUsageFor(interfaze, typeSolver);

                 if (interfazeTypeUsage.isReferenceType()) {
                     ancestors.add(interfazeTypeUsage.asReferenceType());
                 }
             }
         } catch (NotFoundException e) {
             throw new RuntimeException("Ancestor not found for " + ctClass.getName() + ".", e);
         }

         return ancestors;
     }

     @Override
     public ResolvedFieldDeclaration getField(String name) {
         Optional<ResolvedFieldDeclaration> field = javassistTypeDeclarationAdapter.getDeclaredFields().stream().filter(f -> f.getName().equals(name)).findFirst();

         return field.orElseThrow(() -> new RuntimeException("Field " + name + " does not exist in " + ctClass.getName() + "."));
     }

     @Override
     public boolean hasField(String name) {
         return javassistTypeDeclarationAdapter.getDeclaredFields().stream().anyMatch(f -> f.getName().equals(name));
     }

     @Override
     public List<ResolvedFieldDeclaration> getAllFields() {
         return javassistTypeDeclarationAdapter.getDeclaredFields();
     }

     @Override
     public Set<ResolvedMethodDeclaration> getDeclaredMethods() {
         return javassistTypeDeclarationAdapter.getDeclaredMethods();
     }

     @Override
     public boolean isAssignableBy(ResolvedType type) {
         throw new UnsupportedOperationException();
     }

     @Override
     public boolean isAssignableBy(ResolvedReferenceTypeDeclaration other) {
         throw new UnsupportedOperationException();
     }

     @Override
     public boolean hasDirectlyAnnotation(String canonicalName) {
         throw new UnsupportedOperationException();
     }

     @Override
     public String getName() {
         String[] nameElements = ctClass.getSimpleName().replace('$', '.').split("\\.");
         return nameElements[nameElements.length - 1];
     }

     @Override
     public List<ResolvedTypeParameterDeclaration> getTypeParameters() {
         return javassistTypeDeclarationAdapter.getTypeParameters();
     }

     @Override
     public Optional<ResolvedReferenceTypeDeclaration> containerType() {
         return javassistTypeDeclarationAdapter.containerType();
     }

     public SymbolReference<ResolvedMethodDeclaration> solveMethod(String name, List<ResolvedType> argumentsTypes, boolean staticOnly) {
         List<ResolvedMethodDeclaration> candidates = new ArrayList<>();
         Predicate<CtMethod> 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<ResolvedMethodDeclaration> ref = new JavassistClassDeclaration(superClass, 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 Optional<MethodUsage> solveMethodAsUsage(String name, List<ResolvedType> argumentsTypes, TypeSolver typeSolver,
                                                     Context invokationContext, List<ResolvedType> typeParameterValues) {
         return JavassistUtils.getMethodUsage(ctClass, name, argumentsTypes, typeSolver, invokationContext);
     }

     @Override
     public Set<ResolvedReferenceTypeDeclaration> 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 ResolvedReferenceTypeDeclaration getInternalType(String name) {
         /*
         The name of the ReferenceTypeDeclaration could be composed on 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<ResolvedReferenceTypeDeclaration> 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 on 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));
     }

     public SymbolReference<? extends ResolvedValueDeclaration> solveSymbol(String name, TypeSolver typeSolver) {
         for (CtField field : ctClass.getDeclaredFields()) {
             if (field.getName().equals(name)) {
                 return SymbolReference.solved(new JavassistFieldDeclaration(field, typeSolver));
             }
         }

         String[] interfaceFQNs = getInterfaceFQNs();
         for (String interfaceFQN : interfaceFQNs) {
             SymbolReference<? extends ResolvedValueDeclaration> interfaceRef = solveSymbolForFQN(name, typeSolver, interfaceFQN);
             if (interfaceRef.isSolved()) {
                 return interfaceRef;
             }
         }

         return SymbolReference.unsolved(ResolvedValueDeclaration.class);
     }

     private SymbolReference<? extends ResolvedValueDeclaration> solveSymbolForFQN(String symbolName, TypeSolver typeSolver, String fqn) {
         if (fqn == null) {
             return SymbolReference.unsolved(ResolvedValueDeclaration.class);
         }

         ResolvedReferenceTypeDeclaration fqnTypeDeclaration = typeSolver.solveType(fqn);
         return new SymbolSolver(typeSolver).solveSymbolInType(fqnTypeDeclaration, symbolName);
     }

     private String[] getInterfaceFQNs() {
         return ctClass.getClassFile().getInterfaces();
     }

     @Override
     public List<ResolvedEnumConstantDeclaration> getEnumConstants() {
         return Arrays.stream(ctClass.getFields())
                 .filter(f -> (f.getFieldInfo2().getAccessFlags() & AccessFlag.ENUM) != 0)
                 .map(f -> new JavassistEnumConstantDeclaration(f, typeSolver))
                 .collect(Collectors.toList());
     }
 }
	/*
	* 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.expr.MethodCallExpr;
	import com.github.javaparser.resolution.MethodUsage;
	import com.github.javaparser.resolution.UnsolvedSymbolException;
	import com.github.javaparser.resolution.declarations.*;
	import com.github.javaparser.resolution.types.ResolvedReferenceType;
	import com.github.javaparser.resolution.types.ResolvedType;
	import com.github.javaparser.symbolsolver.core.resolution.Context;
	import com.github.javaparser.symbolsolver.logic.AbstractTypeDeclaration;
	import com.github.javaparser.symbolsolver.model.resolution.SymbolReference;
	import com.github.javaparser.symbolsolver.model.resolution.TypeSolver;
	import com.github.javaparser.symbolsolver.resolution.MethodResolutionLogic;
	import com.github.javaparser.symbolsolver.resolution.SymbolSolver;
	import javassist.CtClass;
	import javassist.CtField;
	import javassist.CtMethod;
	import javassist.NotFoundException;
	import javassist.bytecode.AccessFlag;
	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 JavassistEnumDeclaration extends AbstractTypeDeclaration implements ResolvedEnumDeclaration {

	private CtClass ctClass;
	private TypeSolver typeSolver;
	private JavassistTypeDeclarationAdapter javassistTypeDeclarationAdapter;

	public JavassistEnumDeclaration(CtClass ctClass, TypeSolver typeSolver) {
	if (ctClass == null) {
	throw new IllegalArgumentException();
	}
	if (!ctClass.isEnum()) {
	throw new IllegalArgumentException("Trying to instantiate a JavassistEnumDeclaration with something which is not an enum: " + ctClass.toString());
	}
	this.ctClass = ctClass;
	this.typeSolver = typeSolver;
	this.javassistTypeDeclarationAdapter = new JavassistTypeDeclarationAdapter(ctClass, typeSolver);
	}

	@Override
	public AccessSpecifier accessSpecifier() {
	return JavassistFactory.modifiersToAccessLevel(ctClass.getModifiers());
	}

	@Override
	public String getPackageName() {
	return ctClass.getPackageName();
	}

	@Override
	public String getClassName() {
	String name = ctClass.getName().replace('$', '.');
	if (getPackageName() != null) {
	return name.substring(getPackageName().length() + 1, name.length());
	}
	return name;
	}

	@Override
	public String getQualifiedName() {
	return ctClass.getName().replace('$', '.');
	}

	@Override
	public List<ResolvedReferenceType> getAncestors() {
	// Direct ancestors of an enum are java.lang.Enum and interfaces
	List<ResolvedReferenceType> ancestors = new LinkedList<>();

	try {
	CtClass superClass = ctClass.getSuperclass();

	if (superClass != null) {
	ResolvedType superClassTypeUsage = JavassistFactory.typeUsageFor(superClass, typeSolver);

	if (superClassTypeUsage.isReferenceType()) {
	ancestors.add(superClassTypeUsage.asReferenceType());
	}
	}

	for (CtClass interfaze : ctClass.getInterfaces()) {
	ResolvedType interfazeTypeUsage = JavassistFactory.typeUsageFor(interfaze, typeSolver);

	if (interfazeTypeUsage.isReferenceType()) {
	ancestors.add(interfazeTypeUsage.asReferenceType());
	}
	}
	} catch (NotFoundException e) {
	throw new RuntimeException("Ancestor not found for " + ctClass.getName() + ".", e);
	}

	return ancestors;
	}

	@Override
	public ResolvedFieldDeclaration getField(String name) {
	Optional<ResolvedFieldDeclaration> field = javassistTypeDeclarationAdapter.getDeclaredFields().stream().filter(f -> f.getName().equals(name)).findFirst();

	return field.orElseThrow(() -> new RuntimeException("Field " + name + " does not exist in " + ctClass.getName() + "."));
	}

	@Override
	public boolean hasField(String name) {
	return javassistTypeDeclarationAdapter.getDeclaredFields().stream().anyMatch(f -> f.getName().equals(name));
	}

	@Override
	public List<ResolvedFieldDeclaration> getAllFields() {
	return javassistTypeDeclarationAdapter.getDeclaredFields();
	}

	@Override
	public Set<ResolvedMethodDeclaration> getDeclaredMethods() {
	return javassistTypeDeclarationAdapter.getDeclaredMethods();
	}

	@Override
	public boolean isAssignableBy(ResolvedType type) {
	throw new UnsupportedOperationException();
	}

	@Override
	public boolean isAssignableBy(ResolvedReferenceTypeDeclaration other) {
	throw new UnsupportedOperationException();
	}

	@Override
	public boolean hasDirectlyAnnotation(String canonicalName) {
	throw new UnsupportedOperationException();
	}

	@Override
	public String getName() {
	String[] nameElements = ctClass.getSimpleName().replace('$', '.').split("\\.");
	return nameElements[nameElements.length - 1];
	}

	@Override
	public List<ResolvedTypeParameterDeclaration> getTypeParameters() {
	return javassistTypeDeclarationAdapter.getTypeParameters();
	}

	@Override
	public Optional<ResolvedReferenceTypeDeclaration> containerType() {
	return javassistTypeDeclarationAdapter.containerType();
	}

	public SymbolReference<ResolvedMethodDeclaration> solveMethod(String name, List<ResolvedType> argumentsTypes, boolean staticOnly) {
	List<ResolvedMethodDeclaration> candidates = new ArrayList<>();
	Predicate<CtMethod> 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<ResolvedMethodDeclaration> ref = new JavassistClassDeclaration(superClass, 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 Optional<MethodUsage> solveMethodAsUsage(String name, List<ResolvedType> argumentsTypes, TypeSolver typeSolver,
	Context invokationContext, List<ResolvedType> typeParameterValues) {
	return JavassistUtils.getMethodUsage(ctClass, name, argumentsTypes, typeSolver, invokationContext);
	}

	@Override
	public Set<ResolvedReferenceTypeDeclaration> 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 ResolvedReferenceTypeDeclaration getInternalType(String name) {
	/*
	The name of the ReferenceTypeDeclaration could be composed on 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<ResolvedReferenceTypeDeclaration> 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 on 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));
	}

	public SymbolReference<? extends ResolvedValueDeclaration> solveSymbol(String name, TypeSolver typeSolver) {
	for (CtField field : ctClass.getDeclaredFields()) {
	if (field.getName().equals(name)) {
	return SymbolReference.solved(new JavassistFieldDeclaration(field, typeSolver));
	}
	}

	String[] interfaceFQNs = getInterfaceFQNs();
	for (String interfaceFQN : interfaceFQNs) {
	SymbolReference<? extends ResolvedValueDeclaration> interfaceRef = solveSymbolForFQN(name, typeSolver, interfaceFQN);
	if (interfaceRef.isSolved()) {
	return interfaceRef;
	}
	}

	return SymbolReference.unsolved(ResolvedValueDeclaration.class);
	}

	private SymbolReference<? extends ResolvedValueDeclaration> solveSymbolForFQN(String symbolName, TypeSolver typeSolver, String fqn) {
	if (fqn == null) {
	return SymbolReference.unsolved(ResolvedValueDeclaration.class);
	}

	ResolvedReferenceTypeDeclaration fqnTypeDeclaration = typeSolver.solveType(fqn);
	return new SymbolSolver(typeSolver).solveSymbolInType(fqnTypeDeclaration, symbolName);
	}

	private String[] getInterfaceFQNs() {
	return ctClass.getClassFile().getInterfaces();
	}

	@Override
	public List<ResolvedEnumConstantDeclaration> getEnumConstants() {
	return Arrays.stream(ctClass.getFields())
	.filter(f -> (f.getFieldInfo2().getAccessFlags() & AccessFlag.ENUM) != 0)
	.map(f -> new JavassistEnumConstantDeclaration(f, typeSolver))
	.collect(Collectors.toList());
	}
	}