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

Example 1 with ReturnStatement

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

the class ReturnTypeSubProcessor method addMissingReturnStatementProposals.

public static void addMissingReturnStatementProposals(IInvocationContext context, IProblemLocation problem, Collection<ICommandAccess> proposals) {
    ICompilationUnit cu = context.getCompilationUnit();
    ASTNode selectedNode = problem.getCoveringNode(context.getASTRoot());
    if (selectedNode == null) {
        return;
    }
    ReturnStatement existingStatement = (selectedNode instanceof ReturnStatement) ? (ReturnStatement) selectedNode : null;
    // Lambda Expression can be in a MethodDeclaration or a Field Declaration
    if (selectedNode instanceof LambdaExpression) {
        MissingReturnTypeInLambdaCorrectionProposal proposal = new MissingReturnTypeInLambdaCorrectionProposal(cu, (LambdaExpression) selectedNode, existingStatement, IProposalRelevance.MISSING_RETURN_TYPE);
        proposals.add(proposal);
    } else {
        BodyDeclaration decl = ASTResolving.findParentBodyDeclaration(selectedNode);
        if (decl instanceof MethodDeclaration) {
            MethodDeclaration methodDecl = (MethodDeclaration) decl;
            Block block = methodDecl.getBody();
            if (block == null) {
                return;
            }
            proposals.add(new MissingReturnTypeCorrectionProposal(cu, methodDecl, existingStatement, IProposalRelevance.MISSING_RETURN_TYPE));
            Type returnType = methodDecl.getReturnType2();
            if (returnType != null && !"void".equals(ASTNodes.asString(returnType))) {
                //$NON-NLS-1$
                AST ast = methodDecl.getAST();
                ASTRewrite rewrite = ASTRewrite.create(ast);
                rewrite.replace(returnType, ast.newPrimitiveType(PrimitiveType.VOID), null);
                Javadoc javadoc = methodDecl.getJavadoc();
                if (javadoc != null) {
                    TagElement tagElement = JavadocTagsSubProcessor.findTag(javadoc, TagElement.TAG_RETURN, null);
                    if (tagElement != null) {
                        rewrite.remove(tagElement, null);
                    }
                }
                String label = CorrectionMessages.ReturnTypeSubProcessor_changetovoid_description;
                Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
                ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, cu, rewrite, IProposalRelevance.CHANGE_RETURN_TYPE_TO_VOID, image);
                proposals.add(proposal);
            }
        }
    }
}

Example 2 with ReturnStatement

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

the class ExtractToNullCheckedLocalProposal method getRewrite.

@Override
protected ASTRewrite getRewrite() throws CoreException {
    // infrastructure:
    AST ast = this.compilationUnit.getAST();
    ASTRewrite rewrite = ASTRewrite.create(ast);
    ImportRewrite imports = ImportRewrite.create(this.compilationUnit, true);
    TextEditGroup group = new TextEditGroup(FixMessages.ExtractToNullCheckedLocalProposal_extractCheckedLocal_editName);
    LinkedProposalPositionGroup localNameGroup = new LinkedProposalPositionGroup(LOCAL_NAME_POSITION_GROUP);
    getLinkedProposalModel().addPositionGroup(localNameGroup);
    // AST context:
    Statement origStmt = (Statement) ASTNodes.getParent(this.fieldReference, Statement.class);
    // determine suitable strategy for rearranging elements towards a new code structure:
    RearrangeStrategy rearrangeStrategy = RearrangeStrategy.create(origStmt, rewrite, group);
    Expression toReplace;
    ASTNode directParent = this.fieldReference.getParent();
    if (directParent instanceof FieldAccess) {
        toReplace = (Expression) directParent;
    } else if (directParent instanceof QualifiedName && this.fieldReference.getLocationInParent() == QualifiedName.NAME_PROPERTY) {
        toReplace = (Expression) directParent;
    } else {
        toReplace = this.fieldReference;
    }
    // new local declaration initialized from the field reference
    VariableDeclarationFragment localFrag = ast.newVariableDeclarationFragment();
    VariableDeclarationStatement localDecl = ast.newVariableDeclarationStatement(localFrag);
    // ... type
    localDecl.setType(newType(toReplace.resolveTypeBinding(), ast, imports));
    localDecl.modifiers().add(ast.newModifier(Modifier.ModifierKeyword.FINAL_KEYWORD));
    // ... name
    String localName = proposeLocalName(this.fieldReference, this.compilationUnit, getCompilationUnit().getJavaProject());
    localFrag.setName(ast.newSimpleName(localName));
    // ... initialization
    localFrag.setInitializer((Expression) ASTNode.copySubtree(ast, toReplace));
    rearrangeStrategy.insertLocalDecl(localDecl);
    // if statement:
    IfStatement ifStmt = ast.newIfStatement();
    // condition:
    InfixExpression nullCheck = ast.newInfixExpression();
    nullCheck.setLeftOperand(ast.newSimpleName(localName));
    nullCheck.setRightOperand(ast.newNullLiteral());
    nullCheck.setOperator(InfixExpression.Operator.NOT_EQUALS);
    ifStmt.setExpression(nullCheck);
    // then block: the original statement
    Block thenBlock = ast.newBlock();
    thenBlock.statements().add(rearrangeStrategy.createMoveTargetForOrigStmt());
    ifStmt.setThenStatement(thenBlock);
    // ... but with the field reference replaced by the new local:
    SimpleName dereferencedName = ast.newSimpleName(localName);
    rewrite.replace(toReplace, dereferencedName, group);
    // else block: a Todo comment
    Block elseBlock = ast.newBlock();
    //$NON-NLS-1$
    String elseStatement = "// TODO " + FixMessages.ExtractToNullCheckedLocalProposal_todoHandleNullDescription;
    if (origStmt instanceof ReturnStatement) {
        Type returnType = newType(((ReturnStatement) origStmt).getExpression().resolveTypeBinding(), ast, imports);
        ReturnStatement returnStatement = ast.newReturnStatement();
        returnStatement.setExpression(ASTNodeFactory.newDefaultExpression(ast, returnType, 0));
        elseStatement += '\n' + ASTNodes.asFormattedString(returnStatement, 0, String.valueOf('\n'), getCompilationUnit().getJavaProject().getOptions(true));
    }
    EmptyStatement todoNode = (EmptyStatement) rewrite.createStringPlaceholder(elseStatement, ASTNode.EMPTY_STATEMENT);
    elseBlock.statements().add(todoNode);
    ifStmt.setElseStatement(elseBlock);
    // link all three occurrences of the new local variable:
    addLinkedPosition(rewrite.track(localFrag.getName()), true, /*first*/
    LOCAL_NAME_POSITION_GROUP);
    addLinkedPosition(rewrite.track(nullCheck.getLeftOperand()), false, LOCAL_NAME_POSITION_GROUP);
    addLinkedPosition(rewrite.track(dereferencedName), false, LOCAL_NAME_POSITION_GROUP);
    rearrangeStrategy.insertIfStatement(ifStmt, thenBlock);
    return rewrite;
}

Example 3 with ReturnStatement

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

the class MissingReturnTypeCorrectionProposal method getRewrite.

/*(non-Javadoc)
	 * @see org.eclipse.jdt.internal.ui.text.correction.ASTRewriteCorrectionProposal#getRewrite()
	 */
@Override
protected ASTRewrite getRewrite() {
    AST ast = getAST();
    ITypeBinding returnBinding = getReturnTypeBinding();
    if (fExistingReturn != null) {
        ASTRewrite rewrite = ASTRewrite.create(ast);
        Expression expression = evaluateReturnExpressions(ast, returnBinding, fExistingReturn.getStartPosition());
        if (expression != null) {
            rewrite.set(fExistingReturn, ReturnStatement.EXPRESSION_PROPERTY, expression, null);
            addLinkedPosition(rewrite.track(expression), true, RETURN_EXPRESSION_KEY);
        }
        return rewrite;
    } else {
        ASTRewrite rewrite = ASTRewrite.create(ast);
        ASTNode body = getBody();
        // For lambda the body can be a block or an expression.
        if (body instanceof Block) {
            Block block = (Block) body;
            List<Statement> statements = block.statements();
            int nStatements = statements.size();
            ASTNode lastStatement = null;
            if (nStatements > 0) {
                lastStatement = statements.get(nStatements - 1);
            }
            if (returnBinding != null && lastStatement instanceof ExpressionStatement && lastStatement.getNodeType() != ASTNode.ASSIGNMENT) {
                Expression expression = ((ExpressionStatement) lastStatement).getExpression();
                ITypeBinding binding = expression.resolveTypeBinding();
                if (binding != null && binding.isAssignmentCompatible(returnBinding)) {
                    Expression placeHolder = (Expression) rewrite.createMoveTarget(expression);
                    ReturnStatement returnStatement = ast.newReturnStatement();
                    returnStatement.setExpression(placeHolder);
                    rewrite.replace(lastStatement, returnStatement, null);
                    return rewrite;
                }
            }
            int offset;
            if (lastStatement == null) {
                offset = block.getStartPosition() + 1;
            } else {
                offset = lastStatement.getStartPosition() + lastStatement.getLength();
            }
            ReturnStatement returnStatement = ast.newReturnStatement();
            Expression expression = evaluateReturnExpressions(ast, returnBinding, offset);
            returnStatement.setExpression(expression);
            rewrite.getListRewrite(block, Block.STATEMENTS_PROPERTY).insertLast(returnStatement, null);
            addLinkedPosition(rewrite.track(returnStatement.getExpression()), true, RETURN_EXPRESSION_KEY);
        }
        return rewrite;
    }
}

Example 4 with ReturnStatement

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

the class SourceProvider method getExpressionRanges.

private List<IRegion> getExpressionRanges() {
    fMarkerMode = EXPRESSION_MODE;
    List<IRegion> result = new ArrayList<IRegion>(2);
    List<Statement> statements = fDeclaration.getBody().statements();
    ReturnStatement rs = null;
    int size = statements.size();
    ASTNode node;
    switch(size) {
        case 0:
            return result;
        case 1:
            node = statements.get(0);
            if (node.getNodeType() == ASTNode.RETURN_STATEMENT) {
                rs = (ReturnStatement) node;
            } else {
                result.add(createRange(node, node));
            }
            break;
        default:
            {
                node = statements.get(size - 1);
                if (node.getNodeType() == ASTNode.RETURN_STATEMENT) {
                    result.add(createRange(statements, size - 2));
                    rs = (ReturnStatement) node;
                } else {
                    result.add(createRange(statements, size - 1));
                }
                break;
            }
    }
    if (rs != null) {
        Expression exp = rs.getExpression();
        result.add(createRange(exp, exp));
    }
    return result;
}

Example 5 with ReturnStatement

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

the class ModifierCorrectionSubProcessor method addNativeMethodProposals.

public static void addNativeMethodProposals(IInvocationContext context, IProblemLocation problem, Collection<ICommandAccess> proposals) {
    ICompilationUnit cu = context.getCompilationUnit();
    CompilationUnit astRoot = context.getASTRoot();
    ASTNode selectedNode = problem.getCoveringNode(astRoot);
    if (selectedNode == null) {
        return;
    }
    MethodDeclaration decl;
    if (selectedNode instanceof SimpleName) {
        decl = (MethodDeclaration) selectedNode.getParent();
    } else if (selectedNode instanceof MethodDeclaration) {
        decl = (MethodDeclaration) selectedNode;
    } else {
        return;
    }
    {
        AST ast = astRoot.getAST();
        ASTRewrite rewrite = ASTRewrite.create(ast);
        removeModifier(decl, rewrite, Modifier.NATIVE);
        Block newBody = ast.newBlock();
        rewrite.set(decl, MethodDeclaration.BODY_PROPERTY, newBody, null);
        Type returnType = decl.getReturnType2();
        if (returnType != null) {
            Expression expr = ASTNodeFactory.newDefaultExpression(ast, returnType, decl.getExtraDimensions());
            if (expr != null) {
                ReturnStatement returnStatement = ast.newReturnStatement();
                returnStatement.setExpression(expr);
                newBody.statements().add(returnStatement);
            }
        }
        String label = CorrectionMessages.ModifierCorrectionSubProcessor_removenative_description;
        Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
        ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, cu, rewrite, IProposalRelevance.REMOVE_NATIVE, image);
        proposals.add(proposal);
    }
    if (decl.getBody() != null) {
        ASTRewrite rewrite = ASTRewrite.create(decl.getAST());
        rewrite.remove(decl.getBody(), null);
        String label = CorrectionMessages.ModifierCorrectionSubProcessor_removebody_description;
        Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
        ASTRewriteCorrectionProposal proposal2 = new ASTRewriteCorrectionProposal(label, cu, rewrite, IProposalRelevance.REMOVE_METHOD_BODY, image);
        proposals.add(proposal2);
    }
}