ObjectTypeMapping.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Mapping / ObjectTypeMapping.cs / 1305376 / ObjectTypeMapping.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System; 
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
using System.Diagnostics; 
using System.Data.Metadata.Edm;
using System.Data.Common.Utils; 
 
namespace System.Data.Mapping {
    ///  
    /// Represents the metadata for OCObjectMapping.
    /// 
    internal class ObjectTypeMapping : Map {
        #region Constructors 
        /// 
        /// Construct a new ObjectTypeMapping object 
        ///  
        /// 
        ///  
        internal ObjectTypeMapping(EdmType clrType, EdmType cdmType) {
            Debug.Assert(clrType.BuiltInTypeKind == cdmType.BuiltInTypeKind, "BuiltInTypeKind must be the same for both types");
            this.m_clrType = clrType;
            this.m_cdmType = cdmType; 
            identity = clrType.Identity + ObjectMslConstructs.IdentitySeperator + cdmType.Identity;
 
            if (Helper.IsStructuralType(cdmType)) 
            {
                m_memberMapping = new Dictionary(((StructuralType)cdmType).Members.Count); 
            }
            else
            {
                m_memberMapping = EmptyMemberMapping; 
            }
        } 
        #endregion 

        #region Fields 
        #region Internal
        private readonly EdmType m_clrType;  //type on the Clr side that is being mapped
        private readonly EdmType m_cdmType;  //type on the Cdm side that is being mapped
        private readonly string identity; 
        private readonly Dictionary m_memberMapping; //Indexes into the member mappings collection based on clr member name
 
        private static readonly Dictionary EmptyMemberMapping 
            = new Dictionary(0);
        #endregion 
        #endregion

        #region Properties
        ///  
        /// Gets the type kind for this item
        ///  
        public override BuiltInTypeKind BuiltInTypeKind { 
            get { return BuiltInTypeKind.MetadataItem; }
        } 

        /// 
        /// The reference to the Clr type in Metadata
        /// that participates in this mapping instance 
        /// 
        internal EdmType ClrType { 
            get { 
                return this.m_clrType;
            } 
        }

        /// 
        /// The reference to the Cdm type in Metadata 
        /// that participates in this mapping instance
        ///  
        internal override MetadataItem EdmItem { 
            get {
                return this.EdmType; 
            }
        }

        ///  
        /// The reference to the Cdm type in Metadata
        /// that participates in this mapping instance 
        ///  
        internal EdmType EdmType {
            get { 
                return this.m_cdmType;
            }
        }
 
        /// 
        /// Returns the Identity of ObjectTypeMapping. 
        /// The identity for an Object Type Map is the concatenation of 
        /// CLR Type Idntity + ':' + CDM Type Identity
        ///  
        internal override string Identity {
            get {
                return identity;
            } 
        }
 
        #endregion 

        #region Methods 
        /// 
        /// get a MemberMap for the member name specified
        /// 
        /// the name of the CDM member for which map needs to be retrieved 
        internal ObjectPropertyMapping GetPropertyMap(String propertyName)
        { 
            ObjectMemberMapping memberMapping = GetMemberMap(propertyName, false /*ignoreCase*/); 

            if (memberMapping != null && 
                memberMapping.MemberMappingKind == MemberMappingKind.ScalarPropertyMapping ||
                memberMapping.MemberMappingKind == MemberMappingKind.ComplexPropertyMapping)
            {
                return (ObjectPropertyMapping)memberMapping; 
            }
 
            return null; 
        }
 
        /// 
        /// Add a member mapping as a child of this object mapping
        /// 
        /// child property mapping to be added 
        internal void AddMemberMap(ObjectMemberMapping memberMapping) {
            Debug.Assert(memberMapping.ClrMember.Name == memberMapping.EdmMember.Name, 
                "Both clrmember and edmMember name must be the same"); 
            //Check to see if either the Clr member or the Cdm member specified in this
            //type has already been mapped. 
            Debug.Assert(!m_memberMapping.ContainsKey(memberMapping.EdmMember.Name));
            Debug.Assert(!Type.ReferenceEquals(m_memberMapping, EmptyMemberMapping),
                "Make sure you don't add anything to the static emtpy member mapping");
            m_memberMapping.Add(memberMapping.EdmMember.Name, memberMapping); 
        }
 
        ///  
        /// Returns the member map for the given clr member
        ///  
        /// 
        /// 
        /// 
        internal ObjectMemberMapping GetMemberMapForClrMember(string clrMemberName, bool ignoreCase) 
        {
            return GetMemberMap(clrMemberName, ignoreCase); 
        } 

        ///  
        /// returns the member mapping for the given member
        /// 
        /// 
        ///  
        /// 
        private ObjectMemberMapping GetMemberMap(string propertyName, bool ignoreCase) 
        { 
            EntityUtil.CheckStringArgument(propertyName, "propertyName");
            ObjectMemberMapping memberMapping = null; 

            if (!ignoreCase)
            {
                //First get the index of the member map from the clr indexs 
                m_memberMapping.TryGetValue(propertyName, out memberMapping);
            } 
            else 
            {
                foreach (KeyValuePair keyValuePair in m_memberMapping) 
                {
                    if (keyValuePair.Key.Equals(propertyName, StringComparison.OrdinalIgnoreCase))
                    {
                        if (memberMapping != null) 
                        {
                            throw new MappingException(System.Data.Entity.Strings.Mapping_Duplicate_PropertyMap_CaseInsensitive( 
                                propertyName)); 
                        }
                        memberMapping = keyValuePair.Value; 
                    }
                }
            }
 
            return memberMapping;
        } 
 
        /// 
        /// Overriding System.Object.ToString to provide better String representation 
        /// for this type.
        /// 
        public override string ToString()
        { 
            return this.Identity;
        } 
        #endregion 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ObjectTypeMapping.cs source code in C# .NET

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