Utils.cs source code in C# .NET

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Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWeb / Design / system / Data / EntityModel / Emitters / Utils.cs / 1305376 / Utils.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System.Collections.Generic; 
using System.Data.Metadata.Edm;
using System.Diagnostics;
using System.Reflection;
 
namespace System.Data.EntityModel.Emitters
{ 
    ///  
    /// Summary description for Utils
    ///  
    internal static class Utils
    {
        #region Static Fields
 
        public const string WebFrameworkNamespace = "System.Data.Services.Client";
        public const string WebFrameworkCommonNamespace = "System.Data.Services.Common"; 
        public const string AdoFrameworkNamespace = "System.Data.Objects"; 
        public const string AdoFrameworkDataClassesNamespace = "System.Data.Objects.DataClasses";
        public const string AdoFrameworkMetadataEdmNamespace = "System.Data.Metadata.Edm"; 
        public const string AdoEntityClientNamespace = "System.Data.EntityClient";

        public const string SetValidValueMethodName = "SetValidValue";
        public const string ReportPropertyChangingMethodName = "ReportPropertyChanging"; 
        public const string ReportPropertyChangedMethodName = "ReportPropertyChanged";
        public const string GetValidValueMethodName = "GetValidValue"; 
        public const string VerifyComplexObjectIsNotNullName = "VerifyComplexObjectIsNotNull"; 

 
        // this is the list of keywords we check against for names.
        // If a name matches this keyword we prefix it, this is only used when creating parameter names from property, etc. names(see FixKeyword)
        private static string[] _keywords = new string[]
        { 
            "class",
            "event", 
        }; 

 
        // to guarantee uniqueness these must all be unique, begin with and end with an underscore and not contain internal underscores
        private static string[] _privateMemberPrefixes = new string[(int)PrivateMemberPrefixId.Count]
        {
            "_", 
            "_Initialize_",
            "PropertyInfo", 
            "_pi", 
        };
 
        // suffix that is added to field names to create a boolean field used to indicate whether or
        // not a complex property has been explicitly initialized
        private static string _complexPropertyInitializedSuffix = "Initialized";
        private static List> _typeReservedNames = InitializeTypeReservedNames(); 

        ///  
        /// Initialize some statics that cannot be initialized in member declaration... 
        /// 
        static List> InitializeTypeReservedNames() 
        {
            Dictionary typeReservedNames = new Dictionary(StringComparer.Ordinal);
            const BindingFlags bindingFlags = BindingFlags.FlattenHierarchy | BindingFlags.NonPublic | BindingFlags.Public
                    | BindingFlags.Instance | BindingFlags.Static; 
            foreach (MemberInfo member in typeof(object).GetMembers(bindingFlags))
            { 
                if (ShouldReserveName(member)) 
                {
                    if (!typeReservedNames.ContainsKey(member.Name)) 
                    {
                        typeReservedNames.Add(member.Name, null);
                    }
                } 
            }
 
            List> pairs = new List>(); 
            foreach (KeyValuePair pair in typeReservedNames)
            { 
                pairs.Add(pair);
            }

            return pairs; 
        }
 
 
        private static bool ShouldReserveName(MemberInfo member)
        { 
            if (member is EventInfo)
            {
                return ShouldReserveName((EventInfo)member);
            } 
            else if (member is FieldInfo)
            { 
                return ShouldReserveName((FieldInfo)member); 
            }
            else if (member is MethodBase) 
            {
                return ShouldReserveName((MethodBase)member);
            }
            else if (member is PropertyInfo) 
            {
                return ShouldReserveName((PropertyInfo)member); 
            } 
            else
            { 
                Debug.Assert(member is Type, "Did you add a new type of member?");
                return ShouldReserveName((Type)member);
            }
 
        }
 
        private static bool ShouldReserveName(EventInfo member) 
        {
            bool hasNonPrivate = false; 

            MethodInfo miAdd = member.GetAddMethod();
            if (miAdd != null)
            { 
                hasNonPrivate |= ShouldReserveName(miAdd, false);
            } 
 
            MethodInfo miRemove = member.GetRemoveMethod();
            if (miRemove != null) 
            {
                hasNonPrivate |= ShouldReserveName(miRemove, false);
            }
 
            return hasNonPrivate;
        } 
 
        private static bool ShouldReserveName(PropertyInfo member)
        { 
            bool hasNonPrivate = false;

            MethodInfo miSet = member.GetSetMethod();
            if (miSet != null) 
            {
                hasNonPrivate |= ShouldReserveName(miSet, false); 
            } 

            MethodInfo miGet = member.GetGetMethod(); 
            if (miGet != null)
            {
                hasNonPrivate |= ShouldReserveName(miGet, false);
            } 

            return hasNonPrivate; 
        } 

        private static bool ShouldReserveName(FieldInfo member) 
        {
            return !member.IsPrivate && !member.IsAssembly &&
                !member.IsSpecialName;
        } 

        private static bool ShouldReserveName(MethodBase member, bool checkForSpecial) 
        { 
            return !member.IsPrivate && !member.IsAssembly &&
                (!checkForSpecial || !member.IsSpecialName); 
        }

        private static bool ShouldReserveName(MethodBase member)
        { 
            return ShouldReserveName(member, true);
        } 
 
        private static bool ShouldReserveName(Type member)
        { 
            // we don't want to keep types
            return false;
        }
        #endregion 

        #region Public Methods 
        ///  
        ///
        ///  
        /// 
        /// 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Globalization", "CA1308", Justification = "required for this feature")]
        public static string CamelCase(string text) 
        {
            if (string.IsNullOrEmpty(text)) 
                return text; 

            if (text.Length == 1) 
                return text[0].ToString(System.Globalization.CultureInfo.InvariantCulture).ToLowerInvariant();

            return text[0].ToString(System.Globalization.CultureInfo.InvariantCulture).ToLowerInvariant() + text.Substring(1);
        } 

        ///  
        /// 
        /// 
        ///  
        /// 
        public static string PascalCase(string text)
        {
            if (string.IsNullOrEmpty(text)) 
                return text;
 
            if (text.Length == 1) 
                return text[0].ToString(System.Globalization.CultureInfo.InvariantCulture).ToUpperInvariant();
 
            return text[0].ToString(System.Globalization.CultureInfo.InvariantCulture).ToUpperInvariant() + text.Substring(1);
        }

        ///  
        ///
        ///  
        ///  
        /// 
        ///  
        private static string FixKeyword(string name, string prefix)
        {
            foreach (string keyword in _keywords)
            { 
                if (name == keyword)
                { 
                    return prefix + PascalCase(name); 
                }
            } 
            return name;
        }

        ///  
        ///
        ///  
        ///  
        /// 
        ///  
        public static string FixParameterName(string name, string prefix)
        {
            return CamelCase(FixKeyword(name, prefix));
        } 

        ///  
        /// 
        /// 
        ///  
        /// 
        public static string FieldNameFromPropName(string propName)
        {
            return PrivateMemberPrefix(PrivateMemberPrefixId.Field) + propName; 
        }
 
        ///  
        /// Generate the name of a field that is used to indicate whether a complex property has been explicitly initialized
        ///  
        /// Name of the property associated that with this field
        /// Generated field name
        public static string ComplexPropertyInitializedNameFromPropName(string propName)
        { 
            return FieldNameFromPropName(propName) + _complexPropertyInitializedSuffix;
        } 
 
        /// 
        /// get the prefix ussed for a private member 
        /// 
        /// 
        /// 
        public static string PrivateMemberPrefix(PrivateMemberPrefixId id) 
        {
            return _privateMemberPrefixes[(int)id]; 
        } 

        ///  
        ///
        /// 
        /// 
        ///  
        /// 
        public static bool TryGetPrimitiveTypeKind(EdmType type, out PrimitiveTypeKind modelType) 
        { 
            if (!Helper.IsPrimitiveType(type))
            { 
                // set it to something bogus because I have to
                modelType = PrimitiveTypeKind.Binary;
                return false;
            } 

            modelType = ((PrimitiveType)type).PrimitiveTypeKind; 
            return true; 
        }
 
        /// 
        ///
        /// 
        ///  
        /// 
        public static string[] SplitName(string name) 
        { 
            Debug.Assert(!string.IsNullOrEmpty(name), "name parameter is null or empty");
 
            if (name.Length > 0 && name[0] == '.')
                return name.Substring(1).Split('.');

            return name.Split('.'); 
        }
 
        public static string GetFullyQualifiedCodeGenerationAttributeName(string attribute) 
        {
            return XmlConstants.CodeGenerationSchemaNamespace + ":" + attribute; 
        }

        /// 
        /// check if a name is reserved for a type 
        /// 
        /// the object representing the schema type being defined 
        /// the member name 
        /// true if the name is reserved by the type
        public static bool DoesTypeReserveMemberName(StructuralType type, string name, StringComparison comparison) 
        {
            Type reservingType = null;
            if (!TryGetReservedName(name, comparison, out reservingType))
            { 
                return false;
            } 
 
            // if reserving types is null it means the name is reserved for all types.
            if (reservingType == null) 
            {
                return true;
            }
 
            return (reservingType == type.GetType());
        } 
 
        public static bool TryGetReservedName(string name, StringComparison comparison, out Type applyToSpecificType)
        { 
            applyToSpecificType = null;
            foreach (KeyValuePair pair in _typeReservedNames)
            {
                if (pair.Key.Equals(name, comparison)) 
                {
                    applyToSpecificType = pair.Value; 
                    return true; 
                }
            } 

            return false;
        }
 
        public static string SetSpecialCaseForFxCopOnPropertyName(string propertyName)
        { 
            // FxCop consider 'iD' as violation, we will change any property that is 'id'(case insensitive) to 'ID' 
            if (StringComparer.OrdinalIgnoreCase.Equals(propertyName, "id"))
            { 
                return "ID";
            }
            return propertyName;
        } 

        #endregion 
 

    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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