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

Example 26 with IfStatement

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

the class AdvancedQuickAssistProcessor method getExchangeInnerAndOuterIfConditionsProposals.

private static boolean getExchangeInnerAndOuterIfConditionsProposals(IInvocationContext context, ASTNode node, Collection<ICommandAccess> resultingCollections) {
    boolean result = false;
    //
    if (!(node instanceof IfStatement)) {
        return false;
    }
    IfStatement ifStatement = (IfStatement) node;
    if (ifStatement.getElseStatement() != null) {
        return false;
    }
    // case when current IfStatement is sole child of another IfStatement
    {
        IfStatement outerIf = null;
        if (ifStatement.getParent() instanceof IfStatement) {
            outerIf = (IfStatement) ifStatement.getParent();
        } else if (ifStatement.getParent() instanceof Block) {
            Block block = (Block) ifStatement.getParent();
            if (block.getParent() instanceof IfStatement && block.statements().size() == 1) {
                outerIf = (IfStatement) block.getParent();
            }
        }
        if (outerIf != null && outerIf.getElseStatement() == null) {
            if (resultingCollections == null) {
                return true;
            }
            //
            AST ast = node.getAST();
            ASTRewrite rewrite = ASTRewrite.create(ast);
            // prepare conditions
            Expression outerCondition = (Expression) rewrite.createCopyTarget(outerIf.getExpression());
            Expression innerCondition = (Expression) rewrite.createCopyTarget(ifStatement.getExpression());
            // exchange conditions
            rewrite.replace(outerIf.getExpression(), innerCondition, null);
            rewrite.replace(ifStatement.getExpression(), outerCondition, null);
            // add correction proposal
            String label = CorrectionMessages.AdvancedQuickAssistProcessor_exchangeInnerAndOuterIfConditions_description;
            //				Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
            ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.EXCHANGE_INNER_AND_OUTER_IF_CONDITIONS);
            resultingCollections.add(proposal);
            result = true;
        }
    }
    // case when current IfStatement has another IfStatement as sole child
    {
        IfStatement innerIf = null;
        if (ifStatement.getThenStatement() instanceof IfStatement) {
            innerIf = (IfStatement) ifStatement.getThenStatement();
        } else if (ifStatement.getThenStatement() instanceof Block) {
            Block block = (Block) ifStatement.getThenStatement();
            if (block.statements().size() == 1 && block.statements().get(0) instanceof IfStatement) {
                innerIf = (IfStatement) block.statements().get(0);
            }
        }
        if (innerIf != null && innerIf.getElseStatement() == null) {
            if (resultingCollections == null) {
                return true;
            }
            //
            AST ast = node.getAST();
            ASTRewrite rewrite = ASTRewrite.create(ast);
            // prepare conditions
            Expression innerCondition = (Expression) rewrite.createCopyTarget(innerIf.getExpression());
            Expression outerCondition = (Expression) rewrite.createCopyTarget(ifStatement.getExpression());
            // exchange conditions
            rewrite.replace(innerIf.getExpression(), outerCondition, null);
            rewrite.replace(ifStatement.getExpression(), innerCondition, null);
            // add correction proposal
            String label = CorrectionMessages.AdvancedQuickAssistProcessor_exchangeInnerAndOuterIfConditions_description;
            //				Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
            ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.EXCHANGE_INNER_AND_OUTER_IF_CONDITIONS);
            resultingCollections.add(proposal);
            result = true;
        }
    }
    return result;
}

Example 27 with IfStatement

use of org.eclipse.jdt.core.dom.IfStatement 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 28 with IfStatement

use of org.eclipse.jdt.core.dom.IfStatement 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;
}

Example 29 with IfStatement

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

the class AdvancedQuickAssistProcessor method getJoinIfListInIfElseIfProposals.

private static boolean getJoinIfListInIfElseIfProposals(IInvocationContext context, ASTNode covering, ArrayList<ASTNode> coveredNodes, Collection<ICommandAccess> resultingCollections) {
    if (coveredNodes.isEmpty()) {
        return false;
    }
    // check that we have more than one covered statement
    if (coveredNodes.size() < 2) {
        return false;
    }
    // check that all selected nodes are 'if' statements with only 'then' statement
    for (Iterator<ASTNode> iter = coveredNodes.iterator(); iter.hasNext(); ) {
        ASTNode node = iter.next();
        if (!(node instanceof IfStatement)) {
            return false;
        }
        IfStatement ifStatement = (IfStatement) node;
        if (ifStatement.getElseStatement() != null) {
            return false;
        }
    }
    //  we could produce quick assist
    if (resultingCollections == null) {
        return true;
    }
    //
    final AST ast = covering.getAST();
    final ASTRewrite rewrite = ASTRewrite.create(ast);
    //
    IfStatement firstIfStatement = (IfStatement) coveredNodes.get(0);
    IfStatement firstNewIfStatement = null;
    //
    IfStatement prevIfStatement = null;
    for (Iterator<ASTNode> iter = coveredNodes.iterator(); iter.hasNext(); ) {
        IfStatement ifStatement = (IfStatement) iter.next();
        // prepare new 'if' statement
        IfStatement newIfStatement = ast.newIfStatement();
        newIfStatement.setExpression((Expression) rewrite.createMoveTarget(ifStatement.getExpression()));
        // prepare 'then' statement and convert into block if needed
        Statement thenStatement = (Statement) rewrite.createMoveTarget(ifStatement.getThenStatement());
        if (ifStatement.getThenStatement() instanceof IfStatement) {
            IfStatement ifBodyStatement = (IfStatement) ifStatement.getThenStatement();
            if (ifBodyStatement.getElseStatement() == null) {
                Block thenBlock = ast.newBlock();
                thenBlock.statements().add(thenStatement);
                thenStatement = thenBlock;
            }
        }
        newIfStatement.setThenStatement(thenStatement);
        //
        if (prevIfStatement != null) {
            prevIfStatement.setElseStatement(newIfStatement);
            rewrite.remove(ifStatement, null);
        } else {
            firstNewIfStatement = newIfStatement;
        }
        prevIfStatement = newIfStatement;
    }
    rewrite.replace(firstIfStatement, firstNewIfStatement, null);
    // add correction proposal
    String label = CorrectionMessages.AdvancedQuickAssistProcessor_joinIfSequence;
    //		Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.JOIN_IF_SEQUENCE);
    resultingCollections.add(proposal);
    return true;
}

Example 30 with IfStatement

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

the class ControlStatementsFix method createRemoveBlockFix.

public static ControlStatementsFix[] createRemoveBlockFix(CompilationUnit compilationUnit, ASTNode node) {
    if (!(node instanceof Statement)) {
        return null;
    }
    Statement statement = (Statement) node;
    if (statement instanceof Block) {
        Block block = (Block) statement;
        if (block.statements().size() != 1)
            return null;
        ASTNode parent = block.getParent();
        if (!(parent instanceof Statement))
            return null;
        statement = (Statement) parent;
    }
    if (statement instanceof IfStatement) {
        List<ControlStatementsFix> result = new ArrayList<ControlStatementsFix>();
        List<RemoveBlockOperation> removeAllList = new ArrayList<RemoveBlockOperation>();
        IfElseIterator iter = new IfElseIterator((IfStatement) statement);
        IfStatement item = null;
        while (iter.hasNext()) {
            item = iter.next();
            if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(item, IfStatement.THEN_STATEMENT_PROPERTY)) {
                RemoveBlockOperation op = new RemoveBlockOperation(item, IfStatement.THEN_STATEMENT_PROPERTY);
                removeAllList.add(op);
                if (item == statement)
                    result.add(new ControlStatementsFix(FixMessages.ControlStatementsFix_removeIfBlock_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }));
            }
        }
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(item, IfStatement.ELSE_STATEMENT_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(item, IfStatement.ELSE_STATEMENT_PROPERTY);
            removeAllList.add(op);
            if (item == statement)
                result.add(new ControlStatementsFix(FixMessages.ControlStatementsFix_removeElseBlock_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }));
        }
        if (removeAllList.size() > 1) {
            CompilationUnitRewriteOperation[] allConvert = removeAllList.toArray(new CompilationUnitRewriteOperation[removeAllList.size()]);
            result.add(new ControlStatementsFix(FixMessages.ControlStatementsFix_removeIfElseBlock_proposalDescription, compilationUnit, allConvert));
        }
        return result.toArray(new ControlStatementsFix[result.size()]);
    } else if (statement instanceof WhileStatement) {
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(statement, WhileStatement.BODY_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(statement, WhileStatement.BODY_PROPERTY);
            return new ControlStatementsFix[] { new ControlStatementsFix(FixMessages.ControlStatementsFix_removeBrackets_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }) };
        }
    } else if (statement instanceof ForStatement) {
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(statement, ForStatement.BODY_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(statement, ForStatement.BODY_PROPERTY);
            return new ControlStatementsFix[] { new ControlStatementsFix(FixMessages.ControlStatementsFix_removeBrackets_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }) };
        }
    } else if (statement instanceof EnhancedForStatement) {
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(statement, EnhancedForStatement.BODY_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(statement, EnhancedForStatement.BODY_PROPERTY);
            return new ControlStatementsFix[] { new ControlStatementsFix(FixMessages.ControlStatementsFix_removeBrackets_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }) };
        }
    } else if (statement instanceof DoStatement) {
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(statement, DoStatement.BODY_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(statement, DoStatement.BODY_PROPERTY);
            return new ControlStatementsFix[] { new ControlStatementsFix(FixMessages.ControlStatementsFix_removeBrackets_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }) };
        }
    }
    return null;
}