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

Example 6 with ASTPrimaryPrefix

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

the class DoubleCheckedLockingRule method visit.

@Override
public Object visit(ASTMethodDeclaration node, Object data) {
    if (node.getResultType().isVoid()) {
        return super.visit(node, data);
    }
    ASTType typeNode = (ASTType) node.getResultType().jjtGetChild(0);
    if (typeNode.jjtGetNumChildren() == 0 || !(typeNode.jjtGetChild(0) instanceof ASTReferenceType)) {
        return super.visit(node, data);
    }
    List<ASTReturnStatement> rsl = node.findDescendantsOfType(ASTReturnStatement.class);
    if (rsl.size() != 1) {
        return super.visit(node, data);
    }
    ASTReturnStatement rs = rsl.get(0);
    List<ASTPrimaryExpression> pel = rs.findDescendantsOfType(ASTPrimaryExpression.class);
    ASTPrimaryExpression ape = pel.get(0);
    Node lastChild = ape.jjtGetChild(ape.jjtGetNumChildren() - 1);
    String returnVariableName = null;
    if (lastChild instanceof ASTPrimaryPrefix) {
        returnVariableName = getNameFromPrimaryPrefix((ASTPrimaryPrefix) lastChild);
    }
    // With Java5 and volatile keyword, DCL is no longer an issue
    if (returnVariableName == null || this.volatileFields.contains(returnVariableName)) {
        return super.visit(node, data);
    }
    // field, then it's ok, too
    if (checkLocalVariableUsage(node, returnVariableName)) {
        return super.visit(node, data);
    }
    List<ASTIfStatement> isl = node.findDescendantsOfType(ASTIfStatement.class);
    if (isl.size() == 2) {
        ASTIfStatement is = isl.get(0);
        if (ifVerify(is, returnVariableName)) {
            // find synchronized
            List<ASTSynchronizedStatement> ssl = is.findDescendantsOfType(ASTSynchronizedStatement.class);
            if (ssl.size() == 1) {
                ASTSynchronizedStatement ss = ssl.get(0);
                isl = ss.findDescendantsOfType(ASTIfStatement.class);
                if (isl.size() == 1) {
                    ASTIfStatement is2 = isl.get(0);
                    if (ifVerify(is2, returnVariableName)) {
                        List<ASTStatementExpression> sel = is2.findDescendantsOfType(ASTStatementExpression.class);
                        if (sel.size() == 1) {
                            ASTStatementExpression se = sel.get(0);
                            if (se.jjtGetNumChildren() == 3) {
                                // primaryExpression, AssignmentOperator, Expression
                                if (se.jjtGetChild(0) instanceof ASTPrimaryExpression) {
                                    ASTPrimaryExpression pe = (ASTPrimaryExpression) se.jjtGetChild(0);
                                    if (matchName(pe, returnVariableName)) {
                                        if (se.jjtGetChild(1) instanceof ASTAssignmentOperator) {
                                            addViolation(data, node);
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
    return super.visit(node, data);
}

Example 7 with ASTPrimaryPrefix

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

the class DoubleCheckedLockingRule method matchName.

private boolean matchName(ASTPrimaryExpression ape, String name) {
    if (ape.jjtGetNumChildren() == 1 && ape.jjtGetChild(0) instanceof ASTPrimaryPrefix) {
        ASTPrimaryPrefix pp = (ASTPrimaryPrefix) ape.jjtGetChild(0);
        String name2 = getNameFromPrimaryPrefix(pp);
        if (name2 != null && name2.equals(name)) {
            return true;
        }
    }
    return false;
}

Example 8 with ASTPrimaryPrefix

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

the class DoubleCheckedLockingRule method checkLocalVariableUsage.

private boolean checkLocalVariableUsage(ASTMethodDeclaration node, String returnVariableName) {
    List<ASTLocalVariableDeclaration> locals = node.findDescendantsOfType(ASTLocalVariableDeclaration.class);
    ASTVariableInitializer initializer = null;
    for (ASTLocalVariableDeclaration l : locals) {
        ASTVariableDeclaratorId id = l.getFirstDescendantOfType(ASTVariableDeclaratorId.class);
        if (id != null && id.hasImageEqualTo(returnVariableName)) {
            initializer = l.getFirstDescendantOfType(ASTVariableInitializer.class);
            break;
        }
    }
    // the return variable name doesn't seem to be a local variable
    if (initializer == null) {
        return false;
    }
    // verify the value with which the local variable is initialized
    if (initializer.jjtGetNumChildren() > 0 && initializer.jjtGetChild(0) instanceof ASTExpression && initializer.jjtGetChild(0).jjtGetNumChildren() > 0 && initializer.jjtGetChild(0).jjtGetChild(0) instanceof ASTPrimaryExpression && initializer.jjtGetChild(0).jjtGetChild(0).jjtGetNumChildren() > 0 && initializer.jjtGetChild(0).jjtGetChild(0).jjtGetChild(0) instanceof ASTPrimaryPrefix && initializer.jjtGetChild(0).jjtGetChild(0).jjtGetChild(0).jjtGetNumChildren() > 0 && initializer.jjtGetChild(0).jjtGetChild(0).jjtGetChild(0).jjtGetChild(0) instanceof ASTName) {
        ASTName name = (ASTName) initializer.jjtGetChild(0).jjtGetChild(0).jjtGetChild(0).jjtGetChild(0);
        if (name == null || !volatileFields.contains(name.getImage())) {
            return false;
        }
    } else {
        // not a simple assignment
        return false;
    }
    // now check every usage/assignment of the variable
    List<ASTName> names = node.findDescendantsOfType(ASTName.class);
    for (ASTName n : names) {
        if (!n.hasImageEqualTo(returnVariableName)) {
            continue;
        }
        Node expression = n.getNthParent(3);
        if (expression instanceof ASTEqualityExpression) {
            continue;
        }
        if (expression instanceof ASTStatementExpression) {
            if (expression.jjtGetNumChildren() > 2 && expression.jjtGetChild(1) instanceof ASTAssignmentOperator) {
                ASTName value = expression.jjtGetChild(2).getFirstDescendantOfType(ASTName.class);
                if (value == null || !volatileFields.contains(value.getImage())) {
                    return false;
                }
            }
        }
    }
    return true;
}

Example 9 with ASTPrimaryPrefix

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

the class SingletonClassReturningNewInstanceRule method getReturnVariableName.

private String getReturnVariableName(ASTMethodDeclaration node) {
    List<ASTReturnStatement> rsl = node.findDescendantsOfType(ASTReturnStatement.class);
    ASTReturnStatement rs = rsl.get(0);
    List<ASTPrimaryExpression> pel = rs.findDescendantsOfType(ASTPrimaryExpression.class);
    ASTPrimaryExpression ape = pel.get(0);
    Node lastChild = ape.jjtGetChild(0);
    String returnVariableName = null;
    if (lastChild instanceof ASTPrimaryPrefix) {
        returnVariableName = getNameFromPrimaryPrefix((ASTPrimaryPrefix) lastChild);
    }
    /*
         * if(lastChild instanceof ASTPrimarySuffix){ returnVariableName =
         * getNameFromPrimarySuffix((ASTPrimarySuffix) lastChild); }
         */
    return returnVariableName;
}

Example 10 with ASTPrimaryPrefix

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

the class ForLoopCanBeForeachRule method occurenceIsListGet.

/**
 * @return true if this occurence is as an argument to List.get on the correct list
 */
private boolean occurenceIsListGet(NameOccurrence occ, String listName) {
    if (occ.getLocation() instanceof ASTName) {
        ASTPrimarySuffix suffix = occ.getLocation().getFirstParentOfType(ASTPrimarySuffix.class);
        if (suffix == null) {
            return false;
        }
        Node prefix = suffix.jjtGetParent().jjtGetChild(0);
        if (!(prefix instanceof ASTPrimaryPrefix) && prefix.jjtGetNumChildren() != 1 && !(prefix.jjtGetChild(0) instanceof ASTName)) {
            return false;
        }
        String callImage = prefix.jjtGetChild(0).getImage();
        return (listName + ".get").equals(callImage);
    }
    return false;
}