SqlNodeTypeOperators.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DLinq / Dlinq / SqlClient / Common / SqlNodeTypeOperators.cs / 1305376 / SqlNodeTypeOperators.cs
                        

                        
                            using System; 
using System.Collections.Generic;
using System.Text;
using System.Diagnostics.CodeAnalysis;
 
namespace System.Data.Linq.SqlClient {
    internal static class SqlNodeTypeOperators { 
 
        /// 
        /// Determines whether the given unary operator node type returns a value that 
        /// is predicate.
        /// 
        [SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification="These issues are related to our use of if-then and case statements for node types, which adds to the complexity count however when reviewed they are easy to navigate and understand.")]
        internal static bool IsPredicateUnaryOperator(this SqlNodeType nodeType) { 
            switch (nodeType) {
                case SqlNodeType.Not: 
                case SqlNodeType.Not2V: 
                case SqlNodeType.IsNull:
                case SqlNodeType.IsNotNull: 
                    return true;
                case SqlNodeType.Negate:
                case SqlNodeType.BitNot:
                case SqlNodeType.Count: 
                case SqlNodeType.LongCount:
                case SqlNodeType.Max: 
                case SqlNodeType.Min: 
                case SqlNodeType.Sum:
                case SqlNodeType.Avg: 
                case SqlNodeType.Stddev:
                case SqlNodeType.Convert:
                case SqlNodeType.ValueOf:
                case SqlNodeType.OuterJoinedValue: 
                case SqlNodeType.ClrLength:
                    return false; 
                default: 
                    throw Error.UnexpectedNode(nodeType);
            } 
        }

        /// 
        /// Determines whether the given unary operator expects a predicate as input. 
        /// 
        [SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification="These issues are related to our use of if-then and case statements for node types, which adds to the complexity count however when reviewed they are easy to navigate and understand.")] 
        internal static bool IsUnaryOperatorExpectingPredicateOperand(this SqlNodeType nodeType) { 
            switch (nodeType) {
                case SqlNodeType.Not: 
                case SqlNodeType.Not2V:
                    return true;
                case SqlNodeType.IsNull:
                case SqlNodeType.IsNotNull: 
                case SqlNodeType.Negate:
                case SqlNodeType.BitNot: 
                case SqlNodeType.Count: 
                case SqlNodeType.LongCount:
                case SqlNodeType.Max: 
                case SqlNodeType.Min:
                case SqlNodeType.Sum:
                case SqlNodeType.Avg:
                case SqlNodeType.Stddev: 
                case SqlNodeType.Convert:
                case SqlNodeType.ValueOf: 
                case SqlNodeType.OuterJoinedValue: 
                case SqlNodeType.ClrLength:
                    return false; 
                default:
                    throw Error.UnexpectedNode(nodeType);
            }
        } 

        ///  
        /// Determines whether the given binary operator node type returns a value that 
        /// is a predicate boolean.
        ///  
        [SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification="These issues are related to our use of if-then and case statements for node types, which adds to the complexity count however when reviewed they are easy to navigate and understand.")]
        internal static bool IsPredicateBinaryOperator(this SqlNodeType nodeType) {
            switch (nodeType) {
                case SqlNodeType.GE: 
                case SqlNodeType.GT:
                case SqlNodeType.LE: 
                case SqlNodeType.LT: 
                case SqlNodeType.EQ:
                case SqlNodeType.NE: 
                case SqlNodeType.EQ2V:
                case SqlNodeType.NE2V:
                case SqlNodeType.And:
                case SqlNodeType.Or: 
                    return true;
                case SqlNodeType.Add: 
                case SqlNodeType.Sub: 
                case SqlNodeType.Mul:
                case SqlNodeType.Div: 
                case SqlNodeType.Mod:
                case SqlNodeType.BitAnd:
                case SqlNodeType.BitOr:
                case SqlNodeType.BitXor: 
                case SqlNodeType.Concat:
                case SqlNodeType.Coalesce: 
                    return false; 
                default:
                    throw Error.UnexpectedNode(nodeType); 
            }
        }
        /// 
        /// Determines whether this operator is a binary comparison operator (i.e. >, =>, ==, etc) 
        /// 
        [SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification = "These issues are related to our use of if-then and case statements for node types, which adds to the complexity count however when reviewed they are easy to navigate and understand.")] 
        internal static bool IsComparisonOperator(this SqlNodeType nodeType) 
        {
            switch (nodeType) 
            {
                case SqlNodeType.GE:
                case SqlNodeType.GT:
                case SqlNodeType.LE: 
                case SqlNodeType.LT:
                case SqlNodeType.EQ: 
                case SqlNodeType.NE: 
                case SqlNodeType.EQ2V:
                case SqlNodeType.NE2V: 
                    return true;
                case SqlNodeType.And:
                case SqlNodeType.Or:
                case SqlNodeType.Add: 
                case SqlNodeType.Sub:
                case SqlNodeType.Mul: 
                case SqlNodeType.Div: 
                case SqlNodeType.Mod:
                case SqlNodeType.BitAnd: 
                case SqlNodeType.BitOr:
                case SqlNodeType.BitXor:
                case SqlNodeType.Concat:
                case SqlNodeType.Coalesce: 
                    return false;
                default: 
                    throw Error.UnexpectedNode(nodeType); 
            }
        } 

        /// 
        /// Determines whether the given binary operator node type returns a value that
        /// is a predicate boolean. 
        /// 
        [SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification="These issues are related to our use of if-then and case statements for node types, which adds to the complexity count however when reviewed they are easy to navigate and understand.")] 
        internal static bool IsBinaryOperatorExpectingPredicateOperands(this SqlNodeType nodeType) { 
            switch (nodeType) {
                case SqlNodeType.And: 
                case SqlNodeType.Or:
                    return true;
                case SqlNodeType.EQ:
                case SqlNodeType.EQ2V: 
                case SqlNodeType.GE:
                case SqlNodeType.GT: 
                case SqlNodeType.LE: 
                case SqlNodeType.LT:
                case SqlNodeType.NE: 
                case SqlNodeType.NE2V:
                case SqlNodeType.Add:
                case SqlNodeType.Sub:
                case SqlNodeType.Mul: 
                case SqlNodeType.Div:
                case SqlNodeType.Mod: 
                case SqlNodeType.BitAnd: 
                case SqlNodeType.BitOr:
                case SqlNodeType.BitXor: 
                case SqlNodeType.Concat:
                case SqlNodeType.Coalesce:
                    return false;
                default: 
                    throw Error.UnexpectedNode(nodeType);
            } 
        } 

        ///  
        /// Determines whether the given node requires support on the client for evaluation.
        /// For example, LINK nodes may be delay-executed only when the user requests the result.
        /// 
        internal static bool IsClientAidedExpression(this SqlExpression expr) { 
            switch (expr.NodeType) {
                case SqlNodeType.Link: 
                case SqlNodeType.Element: 
                case SqlNodeType.Multiset:
                case SqlNodeType.ClientQuery: 
                case SqlNodeType.TypeCase:
                case SqlNodeType.New:
                    return true;
                default: 
                    return false;
            }; 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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