Util.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Common / CommandTrees / Internal / Util.cs / 1 / Util.cs
                        
                        
                            using System.Collections.Generic; 
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Globalization;
 
using System.Data.Metadata.Edm;
using System.Data.Common.CommandTrees; 
 
namespace System.Data.Common.CommandTrees.Internal
{ 
    internal static class CommandTreeUtils
    {
        internal static List CreateList(T element)
        { 
            List retList = new List();
            retList.Add(element); 
            return retList; 
        }
        internal static List CreateList(T element1, T element2) 
        {
            List retList = new List();
            retList.Add(element1);
            retList.Add(element2); 
            return retList;
        } 
 
        internal static System.Collections.ObjectModel.ReadOnlyCollection NewReadOnlyList(IList sourceList)
        { 
            TElementType[] newList = new TElementType[sourceList.Count];
            sourceList.CopyTo(newList, 0);
            return new System.Collections.ObjectModel.ReadOnlyCollection(newList);
        } 

        internal static string FormatIndex(string arrayVarName, int idx) 
        { 
            System.Text.StringBuilder builder = new System.Text.StringBuilder(arrayVarName.Length + 10 + 2);
            return builder.Append(arrayVarName).Append('[').Append(idx).Append(']').ToString(); 
            //return string.Format(CultureInfo.InvariantCulture, "{0}[{1}]", arrayVarName, idx);
        }

        internal delegate void CheckNamedListCallback(KeyValuePair element, int index); 
        internal static void CheckNamedList(string listVarName, IList> list, bool bAllowEmpty, CheckNamedListCallback callBack)
        { 
            if (null == list) 
            {
                throw EntityUtil.ArgumentNull(listVarName); 
            }

            if (0 == list.Count && !bAllowEmpty)
            { 
                throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_Util_CheckListEmptyInvalid, listVarName);
            } 
 
            List names = new List();
            for (int idx = 0; idx < list.Count; idx++) 
            {
                KeyValuePair element = list[idx];
                string elementName = CommandTreeUtils.FormatIndex(listVarName, idx);
 
                //
                // Check Key for null/empty, Value for null 
                // 
                CommandTreeUtils.CheckNamed(elementName, element);
 
                //
                // Duplicate names are not allowed
                //
                int iNameIdx = names.IndexOf(element.Key); 
                if (iNameIdx > -1)
                { 
                    throw EntityUtil.Argument 
                        (
                            System.Data.Entity.Strings.Cqt_Util_CheckListDuplicateName(iNameIdx, idx, element.Key), 
                            elementName
                        );
                }
 
                //
                // This element is valid, so invoke the callback 
                // 
                if (callBack != null)
                { 
                    callBack(element, idx);
                }
            }
        } 

        internal static void CheckNamed(string strVarName, KeyValuePair element) 
        { 
            if (string.IsNullOrEmpty(element.Key))
            { 
                throw EntityUtil.ArgumentNull(string.Format(CultureInfo.InvariantCulture, "{0}.Key", strVarName));
            }

            if (null == element.Value) 
            {
                throw EntityUtil.ArgumentNull(string.Format(CultureInfo.InvariantCulture, "{0}.Value", strVarName)); 
            } 
        }
 
        internal static bool IsValidDataSpace(DataSpace dataSpace)
        {
            return (DataSpace.OSpace == dataSpace ||
                    DataSpace.CSpace == dataSpace || 
                    DataSpace.SSpace == dataSpace);
        } 
 
        internal static bool TryGetPrimtiveTypeKind(Type clrType, out PrimitiveTypeKind primitiveTypeKind)
        { 
            primitiveTypeKind = default(PrimitiveTypeKind);

            PrimitiveType primitiveType = null;
            if (ClrProviderManifest.Instance.TryGetPrimitiveType(clrType, out primitiveType)) 
            {
                primitiveTypeKind = primitiveType.PrimitiveTypeKind; 
                return true; 
            }
            return false; 
        }

        #region Expression Flattening Helpers
 
        static private readonly HashSet _associativeExpressionKinds = new HashSet(new DbExpressionKind[] {  DbExpressionKind.Or,
                                                                                                                                                DbExpressionKind.And, 
                                                                                                                                                DbExpressionKind.Plus, 
                                                                                                                                                DbExpressionKind.Multiply});
 
        /// 
        /// Creates a flat list of the associative arguments.
        /// For example, for ((A1 + (A2 - A3)) + A4) it will create A1, (A2 - A3), A4
        ///  
        /// 
        ///  
        internal static IEnumerable FlattenAssociativeExpression(DbExpression expression) 
        {
            return FlattenAssociativeExpression(expression.ExpressionKind, expression); 
        }

        /// 
        /// Creates a flat list of the associative arguments. 
        /// For example, for ((A1 + (A2 - A3)) + A4) it will create A1, (A2 - A3), A4
        /// Only 'unfolds' the given arguments that are of the given expression kind. 
        ///  
        /// 
        ///  
        /// 
        internal static IEnumerable FlattenAssociativeExpression(DbExpressionKind expressionKind, params DbExpression[] arguments)
        {
            if (!_associativeExpressionKinds.Contains(expressionKind)) 
            {
                return arguments; 
            } 

            List outputArguments = new List(); 
            foreach (DbExpression argument in arguments)
            {
                ExtractAssociativeArguments(expressionKind, outputArguments, argument);
            } 
            return outputArguments;
        } 
 
        /// 
        /// Helper method for FlattenAssociativeExpression. 
        /// Creates a flat list of the associative arguments and appends to the given argument list.
        /// For example, for ((A1 + (A2 - A3)) + A4) it will add A1, (A2 - A3), A4 to the list.
        /// Only 'unfolds' the given expression if it is of the given expression kind.
        ///  
        /// 
        ///  
        ///  
        private static void ExtractAssociativeArguments(DbExpressionKind expressionKind, List argumentList, DbExpression expression)
        { 
            if (expression.ExpressionKind != expressionKind)
            {
                argumentList.Add(expression);
                return; 
            }
 
            //All associative expressions are binary, thus we must be dealing with a DbBinaryExpresson or 
            // a DbArithmeticExpression with 2 arguments.
            DbBinaryExpression binaryExpression = expression as DbBinaryExpression; 
            if (binaryExpression != null)
            {
                ExtractAssociativeArguments(expressionKind, argumentList, binaryExpression.Left);
                ExtractAssociativeArguments(expressionKind, argumentList, binaryExpression.Right); 
                return;
            } 
 
            DbArithmeticExpression arithExpression = (DbArithmeticExpression)expression;
            ExtractAssociativeArguments(expressionKind, argumentList, arithExpression.Arguments[0]); 
            ExtractAssociativeArguments(expressionKind, argumentList, arithExpression.Arguments[1]);
        }

        #endregion 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
using System.Collections.Generic; 
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Globalization;
 
using System.Data.Metadata.Edm;
using System.Data.Common.CommandTrees; 
 
namespace System.Data.Common.CommandTrees.Internal
{ 
    internal static class CommandTreeUtils
    {
        internal static List CreateList(T element)
        { 
            List retList = new List();
            retList.Add(element); 
            return retList; 
        }
        internal static List CreateList(T element1, T element2) 
        {
            List retList = new List();
            retList.Add(element1);
            retList.Add(element2); 
            return retList;
        } 
 
        internal static System.Collections.ObjectModel.ReadOnlyCollection NewReadOnlyList(IList sourceList)
        { 
            TElementType[] newList = new TElementType[sourceList.Count];
            sourceList.CopyTo(newList, 0);
            return new System.Collections.ObjectModel.ReadOnlyCollection(newList);
        } 

        internal static string FormatIndex(string arrayVarName, int idx) 
        { 
            System.Text.StringBuilder builder = new System.Text.StringBuilder(arrayVarName.Length + 10 + 2);
            return builder.Append(arrayVarName).Append('[').Append(idx).Append(']').ToString(); 
            //return string.Format(CultureInfo.InvariantCulture, "{0}[{1}]", arrayVarName, idx);
        }

        internal delegate void CheckNamedListCallback(KeyValuePair element, int index); 
        internal static void CheckNamedList(string listVarName, IList> list, bool bAllowEmpty, CheckNamedListCallback callBack)
        { 
            if (null == list) 
            {
                throw EntityUtil.ArgumentNull(listVarName); 
            }

            if (0 == list.Count && !bAllowEmpty)
            { 
                throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_Util_CheckListEmptyInvalid, listVarName);
            } 
 
            List names = new List();
            for (int idx = 0; idx < list.Count; idx++) 
            {
                KeyValuePair element = list[idx];
                string elementName = CommandTreeUtils.FormatIndex(listVarName, idx);
 
                //
                // Check Key for null/empty, Value for null 
                // 
                CommandTreeUtils.CheckNamed(elementName, element);
 
                //
                // Duplicate names are not allowed
                //
                int iNameIdx = names.IndexOf(element.Key); 
                if (iNameIdx > -1)
                { 
                    throw EntityUtil.Argument 
                        (
                            System.Data.Entity.Strings.Cqt_Util_CheckListDuplicateName(iNameIdx, idx, element.Key), 
                            elementName
                        );
                }
 
                //
                // This element is valid, so invoke the callback 
                // 
                if (callBack != null)
                { 
                    callBack(element, idx);
                }
            }
        } 

        internal static void CheckNamed(string strVarName, KeyValuePair element) 
        { 
            if (string.IsNullOrEmpty(element.Key))
            { 
                throw EntityUtil.ArgumentNull(string.Format(CultureInfo.InvariantCulture, "{0}.Key", strVarName));
            }

            if (null == element.Value) 
            {
                throw EntityUtil.ArgumentNull(string.Format(CultureInfo.InvariantCulture, "{0}.Value", strVarName)); 
            } 
        }
 
        internal static bool IsValidDataSpace(DataSpace dataSpace)
        {
            return (DataSpace.OSpace == dataSpace ||
                    DataSpace.CSpace == dataSpace || 
                    DataSpace.SSpace == dataSpace);
        } 
 
        internal static bool TryGetPrimtiveTypeKind(Type clrType, out PrimitiveTypeKind primitiveTypeKind)
        { 
            primitiveTypeKind = default(PrimitiveTypeKind);

            PrimitiveType primitiveType = null;
            if (ClrProviderManifest.Instance.TryGetPrimitiveType(clrType, out primitiveType)) 
            {
                primitiveTypeKind = primitiveType.PrimitiveTypeKind; 
                return true; 
            }
            return false; 
        }

        #region Expression Flattening Helpers
 
        static private readonly HashSet _associativeExpressionKinds = new HashSet(new DbExpressionKind[] {  DbExpressionKind.Or,
                                                                                                                                                DbExpressionKind.And, 
                                                                                                                                                DbExpressionKind.Plus, 
                                                                                                                                                DbExpressionKind.Multiply});
 
        /// 
        /// Creates a flat list of the associative arguments.
        /// For example, for ((A1 + (A2 - A3)) + A4) it will create A1, (A2 - A3), A4
        ///  
        /// 
        ///  
        internal static IEnumerable FlattenAssociativeExpression(DbExpression expression) 
        {
            return FlattenAssociativeExpression(expression.ExpressionKind, expression); 
        }

        /// 
        /// Creates a flat list of the associative arguments. 
        /// For example, for ((A1 + (A2 - A3)) + A4) it will create A1, (A2 - A3), A4
        /// Only 'unfolds' the given arguments that are of the given expression kind. 
        ///  
        /// 
        ///  
        /// 
        internal static IEnumerable FlattenAssociativeExpression(DbExpressionKind expressionKind, params DbExpression[] arguments)
        {
            if (!_associativeExpressionKinds.Contains(expressionKind)) 
            {
                return arguments; 
            } 

            List outputArguments = new List(); 
            foreach (DbExpression argument in arguments)
            {
                ExtractAssociativeArguments(expressionKind, outputArguments, argument);
            } 
            return outputArguments;
        } 
 
        /// 
        /// Helper method for FlattenAssociativeExpression. 
        /// Creates a flat list of the associative arguments and appends to the given argument list.
        /// For example, for ((A1 + (A2 - A3)) + A4) it will add A1, (A2 - A3), A4 to the list.
        /// Only 'unfolds' the given expression if it is of the given expression kind.
        ///  
        /// 
        ///  
        ///  
        private static void ExtractAssociativeArguments(DbExpressionKind expressionKind, List argumentList, DbExpression expression)
        { 
            if (expression.ExpressionKind != expressionKind)
            {
                argumentList.Add(expression);
                return; 
            }
 
            //All associative expressions are binary, thus we must be dealing with a DbBinaryExpresson or 
            // a DbArithmeticExpression with 2 arguments.
            DbBinaryExpression binaryExpression = expression as DbBinaryExpression; 
            if (binaryExpression != null)
            {
                ExtractAssociativeArguments(expressionKind, argumentList, binaryExpression.Left);
                ExtractAssociativeArguments(expressionKind, argumentList, binaryExpression.Right); 
                return;
            } 
 
            DbArithmeticExpression arithExpression = (DbArithmeticExpression)expression;
            ExtractAssociativeArguments(expressionKind, argumentList, arithExpression.Arguments[0]); 
            ExtractAssociativeArguments(expressionKind, argumentList, arithExpression.Arguments[1]);
        }

        #endregion 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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Util.cs source code in C# .NET

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