Examples with ASTCastExpression net.sourceforge.pmd.lang.java.ast.ASTCastExpression used on opensource projects

Example 1 with ASTCastExpression

use of net.sourceforge.pmd.lang.java.ast.ASTCastExpression in project pmd by pmd.

the class InsufficientStringBufferDeclarationRule method processNode.

private int processNode(Node sn) {
    int anticipatedLength = 0;
    if (sn != null) {
        ASTPrimaryPrefix xn = sn.getFirstDescendantOfType(ASTPrimaryPrefix.class);
        if (xn != null) {
            if (xn.jjtGetNumChildren() != 0 && xn.jjtGetChild(0) instanceof ASTLiteral) {
                ASTLiteral literal = (ASTLiteral) xn.jjtGetChild(0);
                String str = xn.jjtGetChild(0).getImage();
                if (str != null) {
                    if (literal.isStringLiteral()) {
                        anticipatedLength += str.length() - 2;
                    } else if (literal.isCharLiteral()) {
                        anticipatedLength += 1;
                    } else if (literal.isIntLiteral()) {
                        // but only if we are not inside a cast expression
                        Node parentNode = literal.jjtGetParent().jjtGetParent().jjtGetParent();
                        if (parentNode instanceof ASTCastExpression && ((ASTCastExpression) parentNode).getType() == char.class) {
                            anticipatedLength += 1;
                        } else {
                            // any number, regardless of the base will be converted to base 10
                            // e.g. 0xdeadbeef -> will be converted to a
                            // base 10 integer string: 3735928559
                            anticipatedLength += String.valueOf(literal.getValueAsLong()).length();
                        }
                    } else {
                        anticipatedLength += str.length();
                    }
                }
            }
        }
    }
    return anticipatedLength;
}

Example 2 with ASTCastExpression

use of net.sourceforge.pmd.lang.java.ast.ASTCastExpression in project pmd by pmd.

the class RedundantFieldInitializerRule method visit.

public Object visit(ASTFieldDeclaration fieldDeclaration, Object data) {
    // Finals can only be initialized once.
    if (fieldDeclaration.isFinal()) {
        return data;
    }
    // VariableDeclarator/VariableInitializer/Expression/PrimaryExpression/PrimaryPrefix/Literal
    for (ASTVariableDeclarator variableDeclarator : fieldDeclaration.findChildrenOfType(ASTVariableDeclarator.class)) {
        if (variableDeclarator.jjtGetNumChildren() > 1) {
            final Node variableInitializer = variableDeclarator.jjtGetChild(1);
            if (variableInitializer.jjtGetChild(0) instanceof ASTExpression) {
                final Node expression = variableInitializer.jjtGetChild(0);
                final Node primaryExpression;
                if (expression.jjtGetNumChildren() == 1) {
                    if (expression.jjtGetChild(0) instanceof ASTPrimaryExpression) {
                        primaryExpression = expression.jjtGetChild(0);
                    } else if (expression.jjtGetChild(0) instanceof ASTCastExpression && expression.jjtGetChild(0).jjtGetChild(1) instanceof ASTPrimaryExpression) {
                        primaryExpression = expression.jjtGetChild(0).jjtGetChild(1);
                    } else {
                        continue;
                    }
                } else {
                    continue;
                }
                final Node primaryPrefix = primaryExpression.jjtGetChild(0);
                if (primaryPrefix.jjtGetNumChildren() == 1 && primaryPrefix.jjtGetChild(0) instanceof ASTLiteral) {
                    final ASTLiteral literal = (ASTLiteral) primaryPrefix.jjtGetChild(0);
                    if (isRef(fieldDeclaration, variableDeclarator)) {
                        // Reference type
                        if (literal.jjtGetNumChildren() == 1 && literal.jjtGetChild(0) instanceof ASTNullLiteral) {
                            addViolation(data, variableDeclarator);
                        }
                    } else {
                        // Primitive type
                        if (literal.jjtGetNumChildren() == 1 && literal.jjtGetChild(0) instanceof ASTBooleanLiteral) {
                            // boolean type
                            ASTBooleanLiteral booleanLiteral = (ASTBooleanLiteral) literal.jjtGetChild(0);
                            if (!booleanLiteral.isTrue()) {
                                addViolation(data, variableDeclarator);
                            }
                        } else if (literal.jjtGetNumChildren() == 0) {
                            // numeric type
                            // Note: Not catching NumberFormatException, as
                            // it shouldn't be happening on valid source
                            // code.
                            Number value = -1;
                            if (literal.isIntLiteral()) {
                                value = literal.getValueAsInt();
                            } else if (literal.isLongLiteral()) {
                                value = literal.getValueAsLong();
                            } else if (literal.isFloatLiteral()) {
                                value = literal.getValueAsFloat();
                            } else if (literal.isDoubleLiteral()) {
                                value = literal.getValueAsDouble();
                            } else if (literal.isCharLiteral()) {
                                value = (int) literal.getImage().charAt(1);
                            }
                            if (value.doubleValue() == 0) {
                                addViolation(data, variableDeclarator);
                            }
                        }
                    }
                }
            }
        }
    }
    return data;
}

Example 3 with ASTCastExpression

use of net.sourceforge.pmd.lang.java.ast.ASTCastExpression in project pmd by pmd.

the class UnnecessaryCastRule method process.

private Object process(Node node, Object data) {
    ASTClassOrInterfaceType cit = node.getFirstDescendantOfType(ASTClassOrInterfaceType.class);
    if (cit == null || !implClassNames.contains(cit.getImage())) {
        return data;
    }
    cit = cit.getFirstDescendantOfType(ASTClassOrInterfaceType.class);
    if (cit == null) {
        return data;
    }
    ASTVariableDeclaratorId decl = node.getFirstDescendantOfType(ASTVariableDeclaratorId.class);
    List<NameOccurrence> usages = decl.getUsages();
    for (NameOccurrence no : usages) {
        ASTName name = (ASTName) no.getLocation();
        Node n = name.jjtGetParent().jjtGetParent().jjtGetParent();
        if (n instanceof ASTCastExpression) {
            addViolation(data, n);
        }
    }
    return null;
}

Example 4 with ASTCastExpression

use of net.sourceforge.pmd.lang.java.ast.ASTCastExpression in project pmd by pmd.

the class PreserveStackTraceRule method visit.

@Override
public Object visit(ASTCatchStatement catchStmt, Object data) {
    String target = catchStmt.jjtGetChild(0).findChildrenOfType(ASTVariableDeclaratorId.class).get(0).getImage();
    // Inspect all the throw stmt inside the catch stmt
    List<ASTThrowStatement> lstThrowStatements = catchStmt.findDescendantsOfType(ASTThrowStatement.class);
    for (ASTThrowStatement throwStatement : lstThrowStatements) {
        Node n = throwStatement.jjtGetChild(0).jjtGetChild(0);
        if (n instanceof ASTCastExpression) {
            ASTPrimaryExpression expr = (ASTPrimaryExpression) n.jjtGetChild(1);
            if (expr.jjtGetNumChildren() > 1 && expr.jjtGetChild(1) instanceof ASTPrimaryPrefix) {
                RuleContext ctx = (RuleContext) data;
                addViolation(ctx, throwStatement);
            }
            continue;
        }
        // Retrieve all argument for the throw exception (to see if the
        // original exception is preserved)
        ASTArgumentList args = throwStatement.getFirstDescendantOfType(ASTArgumentList.class);
        if (args != null) {
            Node parent = args.jjtGetParent().jjtGetParent();
            if (parent instanceof ASTAllocationExpression) {
                // maybe it is used inside a anonymous class
                ck(data, target, throwStatement, parent);
            } else {
                // Check all arguments used in the throw statement
                ck(data, target, throwStatement, throwStatement);
            }
        } else {
            Node child = throwStatement.jjtGetChild(0);
            while (child != null && child.jjtGetNumChildren() > 0 && !(child instanceof ASTName)) {
                child = child.jjtGetChild(0);
            }
            if (child != null) {
                if (child instanceof ASTName && !target.equals(child.getImage()) && !child.hasImageEqualTo(target + FILL_IN_STACKTRACE)) {
                    Map<VariableNameDeclaration, List<NameOccurrence>> vars = ((ASTName) child).getScope().getDeclarations(VariableNameDeclaration.class);
                    for (Map.Entry<VariableNameDeclaration, List<NameOccurrence>> entry : vars.entrySet()) {
                        VariableNameDeclaration decl = entry.getKey();
                        List<NameOccurrence> occurrences = entry.getValue();
                        if (decl.getImage().equals(child.getImage())) {
                            if (!isInitCauseCalled(target, occurrences)) {
                                // Check how the variable is initialized
                                ASTVariableInitializer initializer = decl.getNode().jjtGetParent().getFirstDescendantOfType(ASTVariableInitializer.class);
                                if (initializer != null) {
                                    args = initializer.getFirstDescendantOfType(ASTArgumentList.class);
                                    if (args != null) {
                                        // constructor with args?
                                        ck(data, target, throwStatement, args);
                                    } else if (!isFillInStackTraceCalled(target, initializer)) {
                                        addViolation(data, throwStatement);
                                    }
                                }
                            }
                        }
                    }
                } else if (child instanceof ASTClassOrInterfaceType) {
                    addViolation(data, throwStatement);
                }
            }
        }
    }
    return super.visit(catchStmt, data);
}