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

Example 16 with ExpressionStatement

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

the class ExtractMethodRefactoring method createMethodBody.

private Block createMethodBody(ASTNode[] selectedNodes, TextEditGroup substitute, int modifiers) {
    Block result = fAST.newBlock();
    ListRewrite statements = fRewriter.getListRewrite(result, Block.STATEMENTS_PROPERTY);
    // Locals that are not passed as an arguments since the extracted method only
    // writes to them
    IVariableBinding[] methodLocals = fAnalyzer.getMethodLocals();
    for (int i = 0; i < methodLocals.length; i++) {
        if (methodLocals[i] != null) {
            result.statements().add(createDeclaration(methodLocals[i], null));
        }
    }
    for (Iterator<ParameterInfo> iter = fParameterInfos.iterator(); iter.hasNext(); ) {
        ParameterInfo parameter = iter.next();
        if (parameter.isRenamed()) {
            for (int n = 0; n < selectedNodes.length; n++) {
                SimpleName[] oldNames = LinkedNodeFinder.findByBinding(selectedNodes[n], parameter.getOldBinding());
                for (int i = 0; i < oldNames.length; i++) {
                    fRewriter.replace(oldNames[i], fAST.newSimpleName(parameter.getNewName()), null);
                }
            }
        }
    }
    boolean extractsExpression = fAnalyzer.isExpressionSelected();
    ASTNode[] callNodes = createCallNodes(null, modifiers);
    ASTNode replacementNode;
    if (callNodes.length == 1) {
        replacementNode = callNodes[0];
    } else {
        replacementNode = fRewriter.createGroupNode(callNodes);
    }
    if (extractsExpression) {
        // if we have an expression then only one node is selected.
        ITypeBinding binding = fAnalyzer.getExpressionBinding();
        if (binding != null && (!binding.isPrimitive() || !"void".equals(binding.getName()))) {
            //$NON-NLS-1$
            ReturnStatement rs = fAST.newReturnStatement();
            rs.setExpression((Expression) fRewriter.createMoveTarget(selectedNodes[0] instanceof ParenthesizedExpression ? ((ParenthesizedExpression) selectedNodes[0]).getExpression() : selectedNodes[0]));
            statements.insertLast(rs, null);
        } else {
            ExpressionStatement st = fAST.newExpressionStatement((Expression) fRewriter.createMoveTarget(selectedNodes[0]));
            statements.insertLast(st, null);
        }
        fRewriter.replace(selectedNodes[0].getParent() instanceof ParenthesizedExpression ? selectedNodes[0].getParent() : selectedNodes[0], replacementNode, substitute);
    } else {
        if (selectedNodes.length == 1) {
            statements.insertLast(fRewriter.createMoveTarget(selectedNodes[0]), substitute);
            fRewriter.replace(selectedNodes[0], replacementNode, substitute);
        } else {
            ListRewrite source = fRewriter.getListRewrite(selectedNodes[0].getParent(), (ChildListPropertyDescriptor) selectedNodes[0].getLocationInParent());
            ASTNode toMove = source.createMoveTarget(selectedNodes[0], selectedNodes[selectedNodes.length - 1], replacementNode, substitute);
            statements.insertLast(toMove, substitute);
        }
        IVariableBinding returnValue = fAnalyzer.getReturnValue();
        if (returnValue != null) {
            ReturnStatement rs = fAST.newReturnStatement();
            rs.setExpression(fAST.newSimpleName(getName(returnValue)));
            statements.insertLast(rs, null);
        }
    }
    return result;
}

Example 17 with ExpressionStatement

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

the class AdvancedQuickAssistProcessor method createAssignmentStatement.

private static Statement createAssignmentStatement(ASTRewrite rewrite, Assignment.Operator assignmentOperator, Expression origAssignee, Expression origAssigned) {
    AST ast = rewrite.getAST();
    Assignment elseAssignment = ast.newAssignment();
    elseAssignment.setOperator(assignmentOperator);
    elseAssignment.setLeftHandSide((Expression) rewrite.createCopyTarget(origAssignee));
    elseAssignment.setRightHandSide((Expression) rewrite.createCopyTarget(origAssigned));
    ExpressionStatement statement = ast.newExpressionStatement(elseAssignment);
    return statement;
}

Example 18 with ExpressionStatement

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

the class QuickAssistProcessor method getChangeLambdaBodyToBlockProposal.

private static boolean getChangeLambdaBodyToBlockProposal(IInvocationContext context, ASTNode covering, Collection<ICommandAccess> resultingCollections) {
    LambdaExpression lambda;
    if (covering instanceof LambdaExpression) {
        lambda = (LambdaExpression) covering;
    } else if (covering.getLocationInParent() == LambdaExpression.BODY_PROPERTY) {
        lambda = (LambdaExpression) covering.getParent();
    } else {
        return false;
    }
    if (!(lambda.getBody() instanceof Expression))
        return false;
    if (lambda.resolveMethodBinding() == null)
        return false;
    if (resultingCollections == null)
        return true;
    AST ast = lambda.getAST();
    ASTRewrite rewrite = ASTRewrite.create(ast);
    Statement statementInBlockBody;
    Expression bodyExpr = (Expression) rewrite.createMoveTarget(lambda.getBody());
    if (ast.resolveWellKnownType("void").isEqualTo(lambda.resolveMethodBinding().getReturnType())) {
        //$NON-NLS-1$
        ExpressionStatement expressionStatement = ast.newExpressionStatement(bodyExpr);
        statementInBlockBody = expressionStatement;
    } else {
        ReturnStatement returnStatement = ast.newReturnStatement();
        returnStatement.setExpression(bodyExpr);
        statementInBlockBody = returnStatement;
    }
    Block blockBody = ast.newBlock();
    blockBody.statements().add(statementInBlockBody);
    rewrite.set(lambda, LambdaExpression.BODY_PROPERTY, blockBody, null);
    // add proposal
    String label = CorrectionMessages.QuickAssistProcessor_change_lambda_body_to_block;
    //		Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.CHANGE_LAMBDA_BODY_TO_BLOCK);
    resultingCollections.add(proposal);
    return true;
}

Example 19 with ExpressionStatement

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

the class AdvancedQuickAssistProcessor method getReplaceConditionalWithIfElseProposals.

private static boolean getReplaceConditionalWithIfElseProposals(IInvocationContext context, ASTNode covering, Collection<ICommandAccess> resultingCollections) {
    ASTNode node = covering;
    while (!(node instanceof ConditionalExpression) && node instanceof Expression) {
        node = node.getParent();
    }
    if (!(node instanceof ConditionalExpression)) {
        node = covering;
        while (node != null && !(node instanceof Statement)) {
            node = node.getParent();
        }
        if (node instanceof VariableDeclarationStatement) {
            node = (ASTNode) (((VariableDeclarationStatement) node).fragments().get(0));
            node = ((VariableDeclarationFragment) node).getInitializer();
        }
        if (node instanceof ExpressionStatement) {
            node = ((ExpressionStatement) node).getExpression();
            if (node instanceof Assignment) {
                node = ((Assignment) node).getRightHandSide();
            }
        }
        if (node instanceof ReturnStatement) {
            node = ((ReturnStatement) node).getExpression();
        }
    }
    if (!(node instanceof ConditionalExpression)) {
        return false;
    }
    covering = node;
    StructuralPropertyDescriptor locationInParent = covering.getLocationInParent();
    if (locationInParent == Assignment.RIGHT_HAND_SIDE_PROPERTY) {
        if (covering.getParent().getLocationInParent() != ExpressionStatement.EXPRESSION_PROPERTY) {
            return false;
        }
    } else if (locationInParent == VariableDeclarationFragment.INITIALIZER_PROPERTY) {
        ASTNode statement = covering.getParent().getParent();
        if (!(statement instanceof VariableDeclarationStatement) || statement.getLocationInParent() != Block.STATEMENTS_PROPERTY) {
            return false;
        }
    } else if (locationInParent != ReturnStatement.EXPRESSION_PROPERTY) {
        return false;
    }
    ConditionalExpression conditional = (ConditionalExpression) covering;
    //  we could produce quick assist
    if (resultingCollections == null) {
        return true;
    }
    //
    AST ast = covering.getAST();
    ASTRewrite rewrite = ASTRewrite.create(ast);
    // prepare new 'if' statement
    Expression expression = conditional.getExpression();
    while (expression instanceof ParenthesizedExpression) {
        expression = ((ParenthesizedExpression) expression).getExpression();
    }
    IfStatement ifStatement = ast.newIfStatement();
    ifStatement.setExpression((Expression) rewrite.createCopyTarget(expression));
    if (locationInParent == Assignment.RIGHT_HAND_SIDE_PROPERTY) {
        Assignment assignment = (Assignment) covering.getParent();
        Expression assignee = assignment.getLeftHandSide();
        Assignment.Operator op = assignment.getOperator();
        ifStatement.setThenStatement(createAssignmentStatement(rewrite, op, assignee, conditional.getThenExpression()));
        ifStatement.setElseStatement(createAssignmentStatement(rewrite, op, assignee, conditional.getElseExpression()));
        // replace return conditional expression with if/then/else/return
        rewrite.replace(covering.getParent().getParent(), ifStatement, null);
    } else if (locationInParent == ReturnStatement.EXPRESSION_PROPERTY) {
        ifStatement.setThenStatement(createReturnExpression(rewrite, conditional.getThenExpression()));
        ifStatement.setElseStatement(createReturnExpression(rewrite, conditional.getElseExpression()));
        //
        // replace return conditional expression with if/then/else/return
        rewrite.replace(conditional.getParent(), ifStatement, null);
    } else if (locationInParent == VariableDeclarationFragment.INITIALIZER_PROPERTY) {
        VariableDeclarationFragment frag = (VariableDeclarationFragment) covering.getParent();
        Assignment.Operator op = Assignment.Operator.ASSIGN;
        Expression assignee = frag.getName();
        ifStatement.setThenStatement(createAssignmentStatement(rewrite, op, assignee, conditional.getThenExpression()));
        ifStatement.setElseStatement(createAssignmentStatement(rewrite, op, assignee, conditional.getElseExpression()));
        // clear initializer
        rewrite.set(frag, VariableDeclarationFragment.INITIALIZER_PROPERTY, null, null);
        ASTNode statement = frag.getParent();
        rewrite.getListRewrite(statement.getParent(), Block.STATEMENTS_PROPERTY).insertAfter(ifStatement, statement, null);
    }
    // add correction proposal
    String label = CorrectionMessages.AdvancedQuickAssistProcessor_replaceConditionalWithIf;
    //		Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.REPLACE_CONDITIONAL_WITH_IF_ELSE);
    resultingCollections.add(proposal);
    return true;
}

Example 20 with ExpressionStatement

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

the class AdvancedQuickAssistProcessor method getReplaceIfElseWithConditionalProposals.

private static boolean getReplaceIfElseWithConditionalProposals(IInvocationContext context, ASTNode node, Collection<ICommandAccess> resultingCollections) {
    if (!(node instanceof IfStatement)) {
        return false;
    }
    IfStatement ifStatement = (IfStatement) node;
    Statement thenStatement = getSingleStatement(ifStatement.getThenStatement());
    Statement elseStatement = getSingleStatement(ifStatement.getElseStatement());
    if (thenStatement == null || elseStatement == null) {
        return false;
    }
    Expression assigned = null;
    Expression thenExpression = null;
    Expression elseExpression = null;
    ITypeBinding exprBinding = null;
    if (thenStatement instanceof ReturnStatement && elseStatement instanceof ReturnStatement) {
        thenExpression = ((ReturnStatement) thenStatement).getExpression();
        elseExpression = ((ReturnStatement) elseStatement).getExpression();
        MethodDeclaration declaration = ASTResolving.findParentMethodDeclaration(node);
        if (declaration == null || declaration.isConstructor()) {
            return false;
        }
        exprBinding = declaration.getReturnType2().resolveBinding();
    } else if (thenStatement instanceof ExpressionStatement && elseStatement instanceof ExpressionStatement) {
        Expression inner1 = ((ExpressionStatement) thenStatement).getExpression();
        Expression inner2 = ((ExpressionStatement) elseStatement).getExpression();
        if (inner1 instanceof Assignment && inner2 instanceof Assignment) {
            Assignment assign1 = (Assignment) inner1;
            Assignment assign2 = (Assignment) inner2;
            Expression left1 = assign1.getLeftHandSide();
            Expression left2 = assign2.getLeftHandSide();
            if (left1 instanceof Name && left2 instanceof Name && assign1.getOperator() == assign2.getOperator()) {
                IBinding bind1 = ((Name) left1).resolveBinding();
                IBinding bind2 = ((Name) left2).resolveBinding();
                if (bind1 == bind2 && bind1 instanceof IVariableBinding) {
                    assigned = left1;
                    exprBinding = ((IVariableBinding) bind1).getType();
                    thenExpression = assign1.getRightHandSide();
                    elseExpression = assign2.getRightHandSide();
                }
            }
        }
    }
    if (thenExpression == null || elseExpression == null) {
        return false;
    }
    //  we could produce quick assist
    if (resultingCollections == null) {
        return true;
    }
    //
    AST ast = node.getAST();
    ASTRewrite rewrite = ASTRewrite.create(ast);
    //		TightSourceRangeComputer sourceRangeComputer= new TightSourceRangeComputer();
    //		sourceRangeComputer.addTightSourceNode(ifStatement);
    //		rewrite.setTargetSourceRangeComputer(sourceRangeComputer);
    String label = CorrectionMessages.AdvancedQuickAssistProcessor_replaceIfWithConditional;
    //		Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.REPLACE_IF_ELSE_WITH_CONDITIONAL);
    // prepare conditional expression
    ConditionalExpression conditionalExpression = ast.newConditionalExpression();
    Expression conditionCopy = (Expression) rewrite.createCopyTarget(ifStatement.getExpression());
    conditionalExpression.setExpression(conditionCopy);
    Expression thenCopy = (Expression) rewrite.createCopyTarget(thenExpression);
    Expression elseCopy = (Expression) rewrite.createCopyTarget(elseExpression);
    IJavaProject project = context.getCompilationUnit().getJavaProject();
    if (!JavaModelUtil.is50OrHigher(project)) {
        ITypeBinding thenBinding = thenExpression.resolveTypeBinding();
        ITypeBinding elseBinding = elseExpression.resolveTypeBinding();
        if (thenBinding != null && elseBinding != null && exprBinding != null && !elseBinding.isAssignmentCompatible(thenBinding)) {
            CastExpression castException = ast.newCastExpression();
            ImportRewrite importRewrite = proposal.createImportRewrite(context.getASTRoot());
            ImportRewriteContext importRewriteContext = new ContextSensitiveImportRewriteContext(node, importRewrite);
            castException.setType(importRewrite.addImport(exprBinding, ast, importRewriteContext));
            castException.setExpression(elseCopy);
            elseCopy = castException;
        }
    } else if (JavaModelUtil.is17OrHigher(project)) {
        addExplicitTypeArgumentsIfNecessary(rewrite, proposal, thenExpression);
        addExplicitTypeArgumentsIfNecessary(rewrite, proposal, elseExpression);
    }
    conditionalExpression.setThenExpression(thenCopy);
    conditionalExpression.setElseExpression(elseCopy);
    // replace 'if' statement with conditional expression
    if (assigned == null) {
        ReturnStatement returnStatement = ast.newReturnStatement();
        returnStatement.setExpression(conditionalExpression);
        rewrite.replace(ifStatement, returnStatement, null);
    } else {
        Assignment assignment = ast.newAssignment();
        assignment.setLeftHandSide((Expression) rewrite.createCopyTarget(assigned));
        assignment.setRightHandSide(conditionalExpression);
        assignment.setOperator(((Assignment) assigned.getParent()).getOperator());
        ExpressionStatement expressionStatement = ast.newExpressionStatement(assignment);
        rewrite.replace(ifStatement, expressionStatement, null);
    }
    // add correction proposal
    resultingCollections.add(proposal);
    return true;
}