Java Code Examples for org.eclipse.jdt.core.dom.ThisExpression#setQualifier()

private FieldAccess wrapAsFieldAccess(SimpleName fieldName, AST ast) {
	Name qualifierName = null;
	try {
		if (isDeclaredInLambdaExpression()) {
			String enclosingTypeName = getEnclosingTypeName();
			qualifierName = ast.newSimpleName(enclosingTypeName);
		}
	} catch (JavaModelException e) {
		// do nothing.
	}

	FieldAccess fieldAccess = ast.newFieldAccess();
	ThisExpression thisExpression = ast.newThisExpression();
	if (qualifierName != null) {
		thisExpression.setQualifier(qualifierName);
	}
	fieldAccess.setExpression(thisExpression);
	fieldAccess.setName(fieldName);
	return fieldAccess;
}
 

private MethodDeclaration createGetOuterHelper() {
	String outerTypeName= fType.getDeclaringClass().getTypeDeclaration().getName();

	MethodDeclaration helperMethod= fAst.newMethodDeclaration();
	helperMethod.modifiers().addAll(ASTNodeFactory.newModifiers(fAst, Modifier.PRIVATE));
	helperMethod.setName(fAst.newSimpleName(METHODNAME_OUTER_TYPE));
	helperMethod.setConstructor(false);
	helperMethod.setReturnType2(fAst.newSimpleType(fAst.newSimpleName(outerTypeName)));

	Block body= fAst.newBlock();
	helperMethod.setBody(body);

	ThisExpression thisExpression= fAst.newThisExpression();
	thisExpression.setQualifier(fAst.newSimpleName(outerTypeName));

	ReturnStatement endReturn= fAst.newReturnStatement();
	endReturn.setExpression(thisExpression);
	body.statements().add(endReturn);

	return helperMethod;
}
 

/**
 * {@inheritDoc}
 */
@Override
public void rewriteAST(CompilationUnitRewrite cuRewrite, LinkedProposalModel model) throws CoreException {
	ASTRewrite rewrite= cuRewrite.getASTRewrite();
	TextEditGroup group= createTextEditGroup(getDescription(), cuRewrite);
	AST ast= rewrite.getAST();

	FieldAccess fieldAccess= ast.newFieldAccess();

	ThisExpression thisExpression= ast.newThisExpression();
	if (fQualifier != null)
		thisExpression.setQualifier(ast.newName(fQualifier));

	fieldAccess.setExpression(thisExpression);
	fieldAccess.setName((SimpleName) rewrite.createMoveTarget(fName));

	rewrite.replace(fName, fieldAccess, group);
}
 

private Expression createEnclosingInstanceCreationString(final ASTNode node, final ICompilationUnit cu) throws JavaModelException {
	Assert.isTrue((node instanceof ClassInstanceCreation) || (node instanceof SuperConstructorInvocation));
	Assert.isNotNull(cu);
	Expression expression= null;
	if (node instanceof ClassInstanceCreation)
		expression= ((ClassInstanceCreation) node).getExpression();
	else
		expression= ((SuperConstructorInvocation) node).getExpression();
	final AST ast= node.getAST();
	if (expression != null)
		return expression;
	else if (JdtFlags.isStatic(fType))
		return null;
	else if (isInsideSubclassOfDeclaringType(node))
		return ast.newThisExpression();
	else if ((node.getStartPosition() >= fType.getSourceRange().getOffset() && ASTNodes.getExclusiveEnd(node) <= fType.getSourceRange().getOffset() + fType.getSourceRange().getLength())) {
		if (fCodeGenerationSettings.useKeywordThis || fEnclosingInstanceFieldName.equals(fNameForEnclosingInstanceConstructorParameter)) {
			final FieldAccess access= ast.newFieldAccess();
			access.setExpression(ast.newThisExpression());
			access.setName(ast.newSimpleName(fEnclosingInstanceFieldName));
			return access;
		} else
			return ast.newSimpleName(fEnclosingInstanceFieldName);
	} else if (isInsideTypeNestedInDeclaringType(node)) {
		final ThisExpression qualified= ast.newThisExpression();
		qualified.setQualifier(ast.newSimpleName(fType.getDeclaringType().getElementName()));
		return qualified;
	}
	return null;
}
 

private Expression createQualifiedReadAccessExpressionForEnclosingInstance(AST ast) {
	ThisExpression expression= ast.newThisExpression();
	expression.setQualifier(ast.newName(new String[] { fType.getElementName()}));
	FieldAccess access= ast.newFieldAccess();
	access.setExpression(expression);
	access.setName(ast.newSimpleName(fEnclosingInstanceFieldName));
	return access;
}
 

@Override
public final boolean visit(final FieldAccess node) {
	Assert.isNotNull(node);
	final Expression expression= node.getExpression();
	final IVariableBinding variable= node.resolveFieldBinding();
	final AST ast= fRewrite.getAST();
	if (expression instanceof ThisExpression) {
		if (Bindings.equals(fTarget, variable)) {
			if (fAnonymousClass > 0) {
				final ThisExpression target= ast.newThisExpression();
				target.setQualifier(ast.newSimpleName(fTargetType.getElementName()));
				fRewrite.replace(node, target, null);
			} else
				fRewrite.replace(node, ast.newThisExpression(), null);
			return false;
		} else {
			expression.accept(this);
			return false;
		}
	} else if (expression instanceof FieldAccess) {
		final FieldAccess access= (FieldAccess) expression;
		final IBinding binding= access.getName().resolveBinding();
		if (access.getExpression() instanceof ThisExpression && Bindings.equals(fTarget, binding)) {
			ASTNode newFieldAccess= getFieldReference(node.getName(), fRewrite);
			fRewrite.replace(node, newFieldAccess, null);
			return false;
		}
	} else if (expression != null) {
		expression.accept(this);
		return false;
	}
	return true;
}
 

private ASTNode[] createCallNodes(SnippetFinder.Match duplicate, int modifiers) {
	List<ASTNode> result = new ArrayList<>(2);

	IVariableBinding[] locals = fAnalyzer.getCallerLocals();
	for (int i = 0; i < locals.length; i++) {
		result.add(createDeclaration(locals[i], null));
	}

	MethodInvocation invocation = fAST.newMethodInvocation();
	invocation.setName(fAST.newSimpleName(fMethodName));
	ASTNode typeNode = ASTResolving.findParentType(fAnalyzer.getEnclosingBodyDeclaration());
	RefactoringStatus status = new RefactoringStatus();
	while (fDestination != typeNode) {
		fAnalyzer.checkInput(status, fMethodName, typeNode);
		if (!status.isOK()) {
			SimpleName destinationTypeName = fAST.newSimpleName(ASTNodes.getEnclosingType(fDestination).getName());
			if ((modifiers & Modifier.STATIC) == 0) {
				ThisExpression thisExpression = fAST.newThisExpression();
				thisExpression.setQualifier(destinationTypeName);
				invocation.setExpression(thisExpression);
			} else {
				invocation.setExpression(destinationTypeName);
			}
			break;
		}
		typeNode = typeNode.getParent();
	}

	List<Expression> arguments = invocation.arguments();
	for (int i = 0; i < fParameterInfos.size(); i++) {
		ParameterInfo parameter = fParameterInfos.get(i);
		arguments.add(ASTNodeFactory.newName(fAST, getMappedName(duplicate, parameter)));
	}
	if (fLinkedProposalModel != null) {
		LinkedProposalPositionGroupCore nameGroup = fLinkedProposalModel.getPositionGroup(KEY_NAME, true);
		nameGroup.addPosition(fRewriter.track(invocation.getName()), true);
	}

	ASTNode call;
	int returnKind = fAnalyzer.getReturnKind();
	switch (returnKind) {
		case ExtractMethodAnalyzer.ACCESS_TO_LOCAL:
			IVariableBinding binding = fAnalyzer.getReturnLocal();
			if (binding != null) {
				VariableDeclarationStatement decl = createDeclaration(getMappedBinding(duplicate, binding), invocation);
				call = decl;
			} else {
				Assignment assignment = fAST.newAssignment();
				assignment.setLeftHandSide(ASTNodeFactory.newName(fAST, getMappedBinding(duplicate, fAnalyzer.getReturnValue()).getName()));
				assignment.setRightHandSide(invocation);
				call = assignment;
			}
			break;
		case ExtractMethodAnalyzer.RETURN_STATEMENT_VALUE:
			ReturnStatement rs = fAST.newReturnStatement();
			rs.setExpression(invocation);
			call = rs;
			break;
		default:
			call = invocation;
	}

	if (call instanceof Expression && !fAnalyzer.isExpressionSelected()) {
		call = fAST.newExpressionStatement((Expression) call);
	}
	result.add(call);

	// We have a void return statement. The code looks like
	// extracted();
	// return;
	if (returnKind == ExtractMethodAnalyzer.RETURN_STATEMENT_VOID && !fAnalyzer.isLastStatementSelected()) {
		result.add(fAST.newReturnStatement());
	}
	return result.toArray(new ASTNode[result.size()]);
}
 

private static void addQualifierToOuterProposal(IInvocationContext context, MethodInvocation invocationNode,
		IMethodBinding binding, Collection<ChangeCorrectionProposal> proposals) {
	ITypeBinding declaringType= binding.getDeclaringClass();
	ITypeBinding parentType= Bindings.getBindingOfParentType(invocationNode);
	ITypeBinding currType= parentType;

	boolean isInstanceMethod= !Modifier.isStatic(binding.getModifiers());

	while (currType != null && !Bindings.isSuperType(declaringType, currType)) {
		if (isInstanceMethod && Modifier.isStatic(currType.getModifiers())) {
			return;
		}
		currType= currType.getDeclaringClass();
	}
	if (currType == null || currType == parentType) {
		return;
	}

	ASTRewrite rewrite= ASTRewrite.create(invocationNode.getAST());

	String label = Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_changetoouter_description,
			org.eclipse.jdt.ls.core.internal.corrections.ASTResolving.getTypeSignature(currType));
	ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, CodeActionKind.QuickFix, context.getCompilationUnit(),
			rewrite, IProposalRelevance.QUALIFY_WITH_ENCLOSING_TYPE);

	ImportRewrite imports= proposal.createImportRewrite(context.getASTRoot());
	ImportRewriteContext importRewriteContext= new ContextSensitiveImportRewriteContext(invocationNode, imports);
	AST ast= invocationNode.getAST();

	String qualifier= imports.addImport(currType, importRewriteContext);
	Name name= ASTNodeFactory.newName(ast, qualifier);

	Expression newExpression;
	if (isInstanceMethod) {
		ThisExpression expr= ast.newThisExpression();
		expr.setQualifier(name);
		newExpression= expr;
	} else {
		newExpression= name;
	}

	rewrite.set(invocationNode, MethodInvocation.EXPRESSION_PROPERTY, newExpression, null);

	proposals.add(proposal);
}
 

@Override
public final boolean visit(final SimpleName node) {
	Assert.isNotNull(node);
	final AST ast= node.getAST();
	final ASTRewrite rewrite= fRewrite;
	final IBinding binding= node.resolveBinding();
	if (binding instanceof ITypeBinding) {
		ITypeBinding type= (ITypeBinding) binding;
		String name= fTargetRewrite.getImportRewrite().addImport(type.getTypeDeclaration());
		if (name != null && name.indexOf('.') != -1) {
			fRewrite.replace(node, ASTNodeFactory.newName(ast, name), null);
			return false;
		}
	}
	if (Bindings.equals(fTarget, binding))
		if (fAnonymousClass > 0) {
			final ThisExpression target= ast.newThisExpression();
			target.setQualifier(ast.newSimpleName(fTargetType.getElementName()));
			fRewrite.replace(node, target, null);
		} else
			rewrite.replace(node, ast.newThisExpression(), null);
	else if (binding instanceof IVariableBinding) {
		final IVariableBinding variable= (IVariableBinding) binding;
		final IMethodBinding method= fDeclaration.resolveBinding();
		ITypeBinding declaring= variable.getDeclaringClass();
		if (method != null) {
			if (declaring != null && Bindings.isSuperType(declaring, method.getDeclaringClass(), false)) {
				declaring= declaring.getTypeDeclaration();
				if (JdtFlags.isStatic(variable))
					rewrite.replace(node, ast.newQualifiedName(ASTNodeFactory.newName(ast, fTargetRewrite.getImportRewrite().addImport(declaring)), ast.newSimpleName(node.getFullyQualifiedName())), null);
				else {
					final FieldAccess access= ast.newFieldAccess();
					access.setExpression(ast.newSimpleName(fTargetName));
					access.setName(ast.newSimpleName(node.getFullyQualifiedName()));
					rewrite.replace(node, access, null);
				}
			} else if (!(node.getParent() instanceof QualifiedName) && JdtFlags.isStatic(variable) && !fStaticImports.contains(variable) && !Checks.isEnumCase(node.getParent())) {
				rewrite.replace(node, ast.newQualifiedName(ASTNodeFactory.newName(ast, fTargetRewrite.getImportRewrite().addImport(declaring)), ast.newSimpleName(node.getFullyQualifiedName())), null);
			}
		}
	}
	return false;
}
 

/**
 * Attempts to qualify a "this" expression for a method invocation with an appropriate qualifier.
 * The invoked method is analyzed according to the following specs:
 *
 * 'this' must be qualified iff method is declared in an enclosing type or a supertype of an enclosing type
 *
 * 1) The method is declared somewhere outside of the cu of the invocation
 *      1a) inside a supertype of the current type
 *      1b) inside a supertype of an enclosing type
 * 2) The method is declared inside of the cu of the invocation
 * 		2a) inside the type of the invocation
 * 		2b) outside the type of the invocation
 *
 * In case of 1a) and 2b), qualify with the enclosing type.
 * @param expr a {@link ThisExpression}
 * @param originalInvocation the original method invocation
 * @param enclosing the enclosing member of the original method invocation
 * @param unitRewriter the rewrite
 * @return resulting status
 *
 */
private RefactoringStatus qualifyThisExpression(ThisExpression expr, MethodInvocation originalInvocation, IMember enclosing, CompilationUnitRewrite unitRewriter) {

	RefactoringStatus status= new RefactoringStatus();

	IMethodBinding methodBinding= originalInvocation.resolveMethodBinding();
	MethodDeclaration methodDeclaration= (MethodDeclaration) ASTNodes.findDeclaration(methodBinding, originalInvocation.getRoot());

	ITypeBinding currentTypeBinding= null;
	if (methodDeclaration != null) {
		// Case 1) : Declaring type is inside this cu => use its name if it's declared in an enclosing type
		if (ASTNodes.isParent(originalInvocation, methodDeclaration.getParent()))
			currentTypeBinding= methodBinding.getDeclaringClass();
		else
			currentTypeBinding= ASTNodes.getEnclosingType(originalInvocation);
	} else {
		// Case 2) : Declaring type is outside of this cu => find subclass in this cu
		ASTNode currentTypeDeclaration= getEnclosingTypeDeclaration(originalInvocation);
		currentTypeBinding= ASTNodes.getEnclosingType(currentTypeDeclaration);
		while (currentTypeDeclaration != null && (Bindings.findMethodInHierarchy(currentTypeBinding, methodBinding.getName(), methodBinding.getParameterTypes()) == null)) {
			currentTypeDeclaration= getEnclosingTypeDeclaration(currentTypeDeclaration.getParent());
			currentTypeBinding= ASTNodes.getEnclosingType(currentTypeDeclaration);
		}
	}

	if (currentTypeBinding == null) {
		status.merge(createWarningAboutCall(enclosing, originalInvocation, RefactoringCoreMessages.IntroduceIndirectionRefactoring_call_warning_declaring_type_not_found));
		return status;
	}

	currentTypeBinding= currentTypeBinding.getTypeDeclaration();

	ITypeBinding typeOfCall= ASTNodes.getEnclosingType(originalInvocation);
	if (!typeOfCall.equals(currentTypeBinding)) {
		if (currentTypeBinding.isAnonymous()) {
			// Cannot qualify, see bug 115277
			status.merge(createWarningAboutCall(enclosing, originalInvocation, RefactoringCoreMessages.IntroduceIndirectionRefactoring_call_warning_anonymous_cannot_qualify));
		} else {
			expr.setQualifier(unitRewriter.getAST().newSimpleName(currentTypeBinding.getName()));
		}
	} else {
		// do not qualify, only use "this.".
	}

	return status;
}
 

private ASTNode[] createCallNodes(SnippetFinder.Match duplicate, int modifiers) {
	List<ASTNode> result= new ArrayList<ASTNode>(2);

	IVariableBinding[] locals= fAnalyzer.getCallerLocals();
	for (int i= 0; i < locals.length; i++) {
		result.add(createDeclaration(locals[i], null));
	}

	MethodInvocation invocation= fAST.newMethodInvocation();
	invocation.setName(fAST.newSimpleName(fMethodName));
	ASTNode typeNode= ASTResolving.findParentType(fAnalyzer.getEnclosingBodyDeclaration());
	RefactoringStatus status= new RefactoringStatus();
	while (fDestination != typeNode) {
		fAnalyzer.checkInput(status, fMethodName, typeNode);
		if (!status.isOK()) {
			SimpleName destinationTypeName= fAST.newSimpleName(ASTNodes.getEnclosingType(fDestination).getName());
			if ((modifiers & Modifier.STATIC) == 0) {
				ThisExpression thisExpression= fAST.newThisExpression();
				thisExpression.setQualifier(destinationTypeName);
				invocation.setExpression(thisExpression);
			} else {
				invocation.setExpression(destinationTypeName);
			}
			break;
		}
		typeNode= typeNode.getParent();
	}

	List<Expression> arguments= invocation.arguments();
	for (int i= 0; i < fParameterInfos.size(); i++) {
		ParameterInfo parameter= fParameterInfos.get(i);
		arguments.add(ASTNodeFactory.newName(fAST, getMappedName(duplicate, parameter)));
	}
	if (fLinkedProposalModel != null) {
		LinkedProposalPositionGroup nameGroup= fLinkedProposalModel.getPositionGroup(KEY_NAME, true);
		nameGroup.addPosition(fRewriter.track(invocation.getName()), false);
	}

	ASTNode call;
	int returnKind= fAnalyzer.getReturnKind();
	switch (returnKind) {
		case ExtractMethodAnalyzer.ACCESS_TO_LOCAL:
			IVariableBinding binding= fAnalyzer.getReturnLocal();
			if (binding != null) {
				VariableDeclarationStatement decl= createDeclaration(getMappedBinding(duplicate, binding), invocation);
				call= decl;
			} else {
				Assignment assignment= fAST.newAssignment();
				assignment.setLeftHandSide(ASTNodeFactory.newName(fAST,
						getMappedBinding(duplicate, fAnalyzer.getReturnValue()).getName()));
				assignment.setRightHandSide(invocation);
				call= assignment;
			}
			break;
		case ExtractMethodAnalyzer.RETURN_STATEMENT_VALUE:
			ReturnStatement rs= fAST.newReturnStatement();
			rs.setExpression(invocation);
			call= rs;
			break;
		default:
			call= invocation;
	}

	if (call instanceof Expression && !fAnalyzer.isExpressionSelected()) {
		call= fAST.newExpressionStatement((Expression)call);
	}
	result.add(call);

	// We have a void return statement. The code looks like
	// extracted();
	// return;
	if (returnKind == ExtractMethodAnalyzer.RETURN_STATEMENT_VOID && !fAnalyzer.isLastStatementSelected()) {
		result.add(fAST.newReturnStatement());
	}
	return result.toArray(new ASTNode[result.size()]);
}
 

private static void addQualifierToOuterProposal(IInvocationContext context, MethodInvocation invocationNode, IMethodBinding binding, Collection<ICommandAccess> proposals) {
	ITypeBinding declaringType= binding.getDeclaringClass();
	ITypeBinding parentType= Bindings.getBindingOfParentType(invocationNode);
	ITypeBinding currType= parentType;

	boolean isInstanceMethod= !Modifier.isStatic(binding.getModifiers());

	while (currType != null && !Bindings.isSuperType(declaringType, currType)) {
		if (isInstanceMethod && Modifier.isStatic(currType.getModifiers())) {
			return;
		}
		currType= currType.getDeclaringClass();
	}
	if (currType == null || currType == parentType) {
		return;
	}

	ASTRewrite rewrite= ASTRewrite.create(invocationNode.getAST());

	String label= Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_changetoouter_description, ASTResolving.getTypeSignature(currType));
	Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
	ASTRewriteCorrectionProposal proposal= new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.QUALIFY_WITH_ENCLOSING_TYPE, image);

	ImportRewrite imports= proposal.createImportRewrite(context.getASTRoot());
	ImportRewriteContext importRewriteContext= new ContextSensitiveImportRewriteContext(invocationNode, imports);
	AST ast= invocationNode.getAST();

	String qualifier= imports.addImport(currType, importRewriteContext);
	Name name= ASTNodeFactory.newName(ast, qualifier);

	Expression newExpression;
	if (isInstanceMethod) {
		ThisExpression expr= ast.newThisExpression();
		expr.setQualifier(name);
		newExpression= expr;
	} else {
		newExpression= name;
	}

	rewrite.set(invocationNode, MethodInvocation.EXPRESSION_PROPERTY, newExpression, null);

	proposals.add(proposal);
}