Examples with ThisExpression org.eclipse.jdt.core.dom.ThisExpression used on opensource projects

Example 11 with ThisExpression

use of org.eclipse.jdt.core.dom.ThisExpression in project flux by eclipse.

the class QuickAssistProcessor method getInvertEqualsProposal.

private static boolean getInvertEqualsProposal(IInvocationContext context, ASTNode node, Collection<ICommandAccess> resultingCollections) {
    if (!(node instanceof MethodInvocation)) {
        node = node.getParent();
        if (!(node instanceof MethodInvocation)) {
            return false;
        }
    }
    MethodInvocation method = (MethodInvocation) node;
    String identifier = method.getName().getIdentifier();
    if (!"equals".equals(identifier) && !"equalsIgnoreCase".equals(identifier)) {
        // $NON-NLS-1$ //$NON-NLS-2$
        return false;
    }
    List<Expression> arguments = method.arguments();
    if (arguments.size() != 1) {
        // overloaded equals w/ more than 1 argument
        return false;
    }
    Expression right = arguments.get(0);
    ITypeBinding binding = right.resolveTypeBinding();
    if (binding != null && !(binding.isClass() || binding.isInterface() || binding.isEnum())) {
        // overloaded equals w/ non-class/interface argument or null
        return false;
    }
    if (resultingCollections == null) {
        return true;
    }
    Expression left = method.getExpression();
    AST ast = method.getAST();
    ASTRewrite rewrite = ASTRewrite.create(ast);
    if (left == null) {
        // equals(x) -> x.equals(this)
        MethodInvocation replacement = ast.newMethodInvocation();
        replacement.setName((SimpleName) rewrite.createCopyTarget(method.getName()));
        replacement.arguments().add(ast.newThisExpression());
        replacement.setExpression((Expression) rewrite.createCopyTarget(right));
        rewrite.replace(method, replacement, null);
    } else if (right instanceof ThisExpression) {
        // x.equals(this) -> equals(x)
        MethodInvocation replacement = ast.newMethodInvocation();
        replacement.setName((SimpleName) rewrite.createCopyTarget(method.getName()));
        replacement.arguments().add(rewrite.createCopyTarget(left));
        rewrite.replace(method, replacement, null);
    } else {
        ASTNode leftExpression = left;
        while (leftExpression instanceof ParenthesizedExpression) {
            leftExpression = ((ParenthesizedExpression) left).getExpression();
        }
        rewrite.replace(right, rewrite.createCopyTarget(leftExpression), null);
        if (right instanceof CastExpression || right instanceof Assignment || right instanceof ConditionalExpression || right instanceof InfixExpression) {
            ParenthesizedExpression paren = ast.newParenthesizedExpression();
            paren.setExpression((Expression) rewrite.createCopyTarget(right));
            rewrite.replace(left, paren, null);
        } else {
            rewrite.replace(left, rewrite.createCopyTarget(right), null);
        }
    }
    String label = CorrectionMessages.QuickAssistProcessor_invertequals_description;
    // Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    LinkedCorrectionProposal proposal = new LinkedCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.INVERT_EQUALS);
    resultingCollections.add(proposal);
    return true;
}

Example 12 with ThisExpression

use of org.eclipse.jdt.core.dom.ThisExpression in project AutoRefactor by JnRouvignac.

the class CFGBuilder method addVariableAccess.

/**
 * @return whether the current variable access can throw an exception.
 */
private boolean addVariableAccess(final CFGBasicBlock basicBlock, final Expression node, final int flags, final ThrowerBlocks throwers) {
    if (node == null) {
        return false;
    }
    switch(node.getNodeType()) {
        case ASTNode.ARRAY_ACCESS:
            ArrayAccess aa = (ArrayAccess) node;
            addVariableAccess(basicBlock, aa.getArray(), flags, throwers);
            addVariableAccess(basicBlock, aa.getIndex(), flags, throwers);
            throwers.addThrow(aa, newException(node, ArrayIndexOutOfBoundsException.class.getCanonicalName()));
            return true;
        case ASTNode.ARRAY_CREATION:
            ArrayCreation ac = (ArrayCreation) node;
            boolean acMightThrow1 = addVariableAccess(basicBlock, ac.getInitializer(), flags, throwers);
            boolean acMightThrow2 = addVariableAccesses(basicBlock, ac.dimensions(), flags, throwers);
            return acMightThrow1 || acMightThrow2;
        case ASTNode.ARRAY_INITIALIZER:
            ArrayInitializer ai = (ArrayInitializer) node;
            return addVariableAccesses(basicBlock, ai.expressions(), flags, throwers);
        case ASTNode.ASSIGNMENT:
            Assignment a = (Assignment) node;
            boolean aMightThrow1 = addVariableAccess(basicBlock, a.getLeftHandSide(), VariableAccess.WRITE, throwers);
            boolean aMightThrow2 = addVariableAccess(basicBlock, a.getRightHandSide(), VariableAccess.READ, throwers);
            return aMightThrow1 || aMightThrow2;
        case ASTNode.BOOLEAN_LITERAL:
        case ASTNode.CHARACTER_LITERAL:
        case ASTNode.NULL_LITERAL:
        case ASTNode.NUMBER_LITERAL:
        case ASTNode.STRING_LITERAL:
        case ASTNode.TYPE_LITERAL:
            // Nothing to do
            return false;
        case ASTNode.CAST_EXPRESSION:
            CastExpression cae = (CastExpression) node;
            return addVariableAccess(basicBlock, cae.getExpression(), flags, throwers);
        case ASTNode.CLASS_INSTANCE_CREATION:
            ClassInstanceCreation classInstanceCreation = (ClassInstanceCreation) node;
            addVariableAccess(basicBlock, classInstanceCreation.getExpression(), flags, throwers);
            addVariableAccesses(basicBlock, classInstanceCreation.arguments(), flags, throwers);
            IMethodBinding cicBinding = classInstanceCreation.resolveConstructorBinding();
            if (cicBinding != null) {
                ITypeBinding[] declaredThrows = cicBinding.getExceptionTypes();
                throwers.addThrow(classInstanceCreation, declaredThrows);
                return declaredThrows.length > 0;
            }
            return false;
        case ASTNode.CONDITIONAL_EXPRESSION:
            ConditionalExpression coe = (ConditionalExpression) node;
            boolean mightThrow1 = addVariableAccess(basicBlock, coe.getExpression(), flags, throwers);
            boolean mightThrow2 = addVariableAccess(basicBlock, coe.getThenExpression(), flags, throwers);
            boolean mightThrow3 = addVariableAccess(basicBlock, coe.getElseExpression(), flags, throwers);
            return mightThrow1 || mightThrow2 || mightThrow3;
        case ASTNode.FIELD_ACCESS:
            FieldAccess fa = (FieldAccess) node;
            boolean mightThrow = addVariableAccess(basicBlock, fa.getExpression(), flags, throwers);
            basicBlock.addVariableAccess(new VariableAccess(fa, flags));
            if (is(flags, VariableAccess.READ)) {
                throwers.addThrow(fa, newException(node, NullPointerException.class.getCanonicalName()));
                mightThrow = true;
            }
            return mightThrow;
        case ASTNode.INFIX_EXPRESSION:
            InfixExpression infixExpression = (InfixExpression) node;
            boolean ieMightThrow1 = addVariableAccess(basicBlock, infixExpression.getLeftOperand(), flags, throwers);
            boolean ieMightThrow2 = addVariableAccess(basicBlock, infixExpression.getRightOperand(), flags, throwers);
            return ieMightThrow1 || ieMightThrow2;
        case ASTNode.INSTANCEOF_EXPRESSION:
            InstanceofExpression ioe = (InstanceofExpression) node;
            return addVariableAccess(basicBlock, ioe.getLeftOperand(), flags, throwers);
        case ASTNode.METHOD_INVOCATION:
            MethodInvocation methodInvocation = (MethodInvocation) node;
            addVariableAccess(basicBlock, methodInvocation.getExpression(), flags, throwers);
            addVariableAccesses(basicBlock, methodInvocation.arguments(), flags, throwers);
            IMethodBinding methodBinding = methodInvocation.resolveMethodBinding();
            if (methodBinding != null) {
                ITypeBinding[] declaredThrows = methodBinding.getExceptionTypes();
                throwers.addThrow(methodInvocation, declaredThrows);
                return declaredThrows.length > 0;
            }
            return false;
        case ASTNode.SIMPLE_NAME:
            SimpleName sn = (SimpleName) node;
            basicBlock.addVariableAccess(new VariableAccess(sn, flags));
            if (is(flags, VariableAccess.READ)) {
                throwers.addThrow(sn, newException(node, NullPointerException.class.getCanonicalName()));
                return true;
            }
            return false;
        case ASTNode.QUALIFIED_NAME:
            QualifiedName qn = (QualifiedName) node;
            basicBlock.addVariableAccess(new VariableAccess(qn, flags));
            throwers.addThrow(qn, newException(node, NullPointerException.class.getCanonicalName()));
            return true;
        case ASTNode.PARENTHESIZED_EXPRESSION:
            ParenthesizedExpression pe = (ParenthesizedExpression) node;
            return addVariableAccess(basicBlock, pe.getExpression(), flags, throwers);
        case ASTNode.POSTFIX_EXPRESSION:
            PostfixExpression poe = (PostfixExpression) node;
            return addVariableAccess(basicBlock, poe.getOperand(), flags, throwers);
        case ASTNode.PREFIX_EXPRESSION:
            PrefixExpression pre = (PrefixExpression) node;
            return addVariableAccess(basicBlock, pre.getOperand(), flags, throwers);
        case ASTNode.SUPER_FIELD_ACCESS:
            SuperFieldAccess sfa = (SuperFieldAccess) node;
            boolean sfaMightThrow1 = addVariableAccess(basicBlock, sfa.getQualifier(), flags, throwers);
            boolean sfaMightThrow2 = addVariableAccess(basicBlock, sfa.getName(), flags, throwers);
            return sfaMightThrow1 || sfaMightThrow2;
        case ASTNode.SUPER_METHOD_INVOCATION:
            SuperMethodInvocation smi = (SuperMethodInvocation) node;
            addVariableAccess(basicBlock, smi.getQualifier(), flags, throwers);
            addVariableAccess(basicBlock, smi.getName(), flags, throwers);
            IMethodBinding sMethodBinding = smi.resolveMethodBinding();
            if (sMethodBinding != null) {
                ITypeBinding[] declaredThrows = sMethodBinding.getExceptionTypes();
                throwers.addThrow(smi, declaredThrows);
                return declaredThrows.length > 0;
            }
            return false;
        case ASTNode.THIS_EXPRESSION:
            ThisExpression te = (ThisExpression) node;
            // TODO JNR remember use of "this" here
            return addVariableAccess(basicBlock, te.getQualifier(), flags, throwers);
        case ASTNode.VARIABLE_DECLARATION_EXPRESSION:
            return addDeclarations(basicBlock, (VariableDeclarationExpression) node, throwers);
        default:
            throw new NotImplementedException(node);
    }
}

Example 13 with ThisExpression

use of org.eclipse.jdt.core.dom.ThisExpression in project AutoRefactor by JnRouvignac.

the class ObsoleteJava7HashRatherThanEclipseJava6HashCleanUp method getField.

private SimpleName getField(final Expression expression) {
    SimpleName simpleName = ASTNodes.as(expression, SimpleName.class);
    if (simpleName != null) {
        return simpleName;
    }
    FieldAccess fieldName = ASTNodes.as(expression, FieldAccess.class);
    if (fieldName != null) {
        ThisExpression te = ASTNodes.as(fieldName.getExpression(), ThisExpression.class);
        if (te != null) {
            if (te.getQualifier() == null) {
                return fieldName.getName();
            }
            if (te.getQualifier().isSimpleName()) {
                SimpleName qualifier = (SimpleName) te.getQualifier();
                TypeDeclaration visitedClass = ASTNodes.getTypedAncestor(expression, TypeDeclaration.class);
                if (visitedClass != null && ASTNodes.isSameVariable(visitedClass.getName(), qualifier)) {
                    return fieldName.getName();
                }
            }
        }
    }
    SuperFieldAccess superFieldAccess = ASTNodes.as(expression, SuperFieldAccess.class);
    if (superFieldAccess != null) {
        if (superFieldAccess.getQualifier() == null) {
            return superFieldAccess.getName();
        }
        if (superFieldAccess.getQualifier().isSimpleName()) {
            SimpleName qualifier = (SimpleName) superFieldAccess.getQualifier();
            TypeDeclaration visitedClass = ASTNodes.getTypedAncestor(expression, TypeDeclaration.class);
            if (visitedClass != null && ASTNodes.isSameVariable(visitedClass.getName(), qualifier)) {
                return superFieldAccess.getName();
            }
        }
    }
    return null;
}

Example 14 with ThisExpression

use of org.eclipse.jdt.core.dom.ThisExpression in project che by eclipse.

the class ExtractMethodAnalyzer method endVisit.

@Override
public void endVisit(CompilationUnit node) {
    RefactoringStatus status = getStatus();
    superCall: {
        if (status.hasFatalError())
            break superCall;
        if (!hasSelectedNodes()) {
            ASTNode coveringNode = getLastCoveringNode();
            if (coveringNode instanceof Block && coveringNode.getParent() instanceof MethodDeclaration) {
                MethodDeclaration methodDecl = (MethodDeclaration) coveringNode.getParent();
                Message[] messages = ASTNodes.getMessages(methodDecl, ASTNodes.NODE_ONLY);
                if (messages.length > 0) {
                    status.addFatalError(Messages.format(RefactoringCoreMessages.ExtractMethodAnalyzer_compile_errors, BasicElementLabels.getJavaElementName(methodDecl.getName().getIdentifier())), JavaStatusContext.create(fCUnit, methodDecl));
                    break superCall;
                }
            }
            status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_invalid_selection);
            break superCall;
        }
        fEnclosingBodyDeclaration = (BodyDeclaration) ASTNodes.getParent(getFirstSelectedNode(), BodyDeclaration.class);
        if (fEnclosingBodyDeclaration == null || (fEnclosingBodyDeclaration.getNodeType() != ASTNode.METHOD_DECLARATION && fEnclosingBodyDeclaration.getNodeType() != ASTNode.FIELD_DECLARATION && fEnclosingBodyDeclaration.getNodeType() != ASTNode.INITIALIZER)) {
            status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_invalid_selection);
            break superCall;
        } else if (ASTNodes.getEnclosingType(fEnclosingBodyDeclaration) == null) {
            status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_compile_errors_no_parent_binding);
            break superCall;
        } else if (fEnclosingBodyDeclaration.getNodeType() == ASTNode.METHOD_DECLARATION) {
            fEnclosingMethodBinding = ((MethodDeclaration) fEnclosingBodyDeclaration).resolveBinding();
        }
        if (!isSingleExpressionOrStatementSet()) {
            status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_single_expression_or_set);
            break superCall;
        }
        if (isExpressionSelected()) {
            ASTNode expression = getFirstSelectedNode();
            if (expression instanceof Name) {
                Name name = (Name) expression;
                if (name.resolveBinding() instanceof ITypeBinding) {
                    status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_type_reference);
                    break superCall;
                }
                if (name.resolveBinding() instanceof IMethodBinding) {
                    status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_method_name_reference);
                    break superCall;
                }
                if (name.resolveBinding() instanceof IVariableBinding) {
                    StructuralPropertyDescriptor locationInParent = name.getLocationInParent();
                    if (locationInParent == QualifiedName.NAME_PROPERTY || (locationInParent == FieldAccess.NAME_PROPERTY && !(((FieldAccess) name.getParent()).getExpression() instanceof ThisExpression))) {
                        status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_part_of_qualified_name);
                        break superCall;
                    }
                }
                if (name.isSimpleName() && ((SimpleName) name).isDeclaration()) {
                    status.addFatalError(RefactoringCoreMessages.ExtractMethodAnalyzer_cannot_extract_name_in_declaration);
                    break superCall;
                }
            }
            fForceStatic = ASTNodes.getParent(expression, ASTNode.SUPER_CONSTRUCTOR_INVOCATION) != null || ASTNodes.getParent(expression, ASTNode.CONSTRUCTOR_INVOCATION) != null;
        }
        status.merge(LocalTypeAnalyzer.perform(fEnclosingBodyDeclaration, getSelection()));
        computeLastStatementSelected();
    }
    super.endVisit(node);
}

Example 15 with ThisExpression

use of org.eclipse.jdt.core.dom.ThisExpression in project che by eclipse.

the class UnresolvedElementsSubProcessor method addQualifierToOuterProposal.

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);
}