EntityRecordInfo.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 / DataEntity / System / Data / Common / EntityRecordInfo.cs / 1305376 / EntityRecordInfo.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
//----------------------------------------------------------------------------- 
 
namespace System.Data.Common {
 
    using System.Data;
    using System.Collections.Generic;
    using System.Data.Metadata.Edm;
    using System.Diagnostics; 

    ///  
    /// EntityRecordInfo class providing a simple way to access both the type information and the column information. 
    /// 
    public class EntityRecordInfo : DataRecordInfo { 

        private readonly EntityKey _entityKey;
        private readonly EntitySet _entitySet;
 
        /// 
        /// 
        ///  
        /// 
        ///  
        /// 
        public EntityRecordInfo(EntityType metadata, IEnumerable memberInfo, EntityKey entityKey, EntitySet entitySet)
            : base(TypeUsage.Create(metadata), memberInfo) {
            EntityUtil.CheckArgumentNull(entityKey, "entityKey"); 
            EntityUtil.CheckArgumentNull(entitySet, "entitySet");
 
            _entityKey = entityKey; 
            _entitySet = entitySet;
            ValidateEntityType(entitySet); 
        }

        /// 
        /// 
        /// 
        ///  
        ///  
        internal EntityRecordInfo(EntityType metadata, EntityKey entityKey, EntitySet entitySet)
            : base(TypeUsage.Create(metadata)) { 
            EntityUtil.CheckArgumentNull(entityKey, "entityKey");

            _entityKey = entityKey;
            _entitySet = entitySet; 
#if DEBUG
            try 
            { 
                ValidateEntityType(entitySet);
            } 
            catch
            {
                Debug.Assert(false, "should always be valid EntityType when internally constructed");
                throw; 
            }
#endif 
        } 

        ///  
        /// Reusing TypeUsage and FieldMetadata from another EntityRecordInfo which has all the same info
        /// but with a different EntityKey instance.
        /// 
        internal EntityRecordInfo(DataRecordInfo info, EntityKey entityKey, EntitySet entitySet) 
            : base(info)
        { 
            _entityKey = entityKey; 
            _entitySet = entitySet;
#if DEBUG 
            try
            {
                ValidateEntityType(entitySet);
            } 
            catch
            { 
                Debug.Assert(false, "should always be valid EntityType when internally constructed"); 
                throw;
            } 
#endif
        }

        ///  
        /// the EntityKey
        ///  
        public EntityKey EntityKey { 
            get {
                return _entityKey; 
            }
        }

        // using EntitySetBase versus EntitySet prevents the unnecessary cast of ElementType to EntityType 
        private void ValidateEntityType(EntitySetBase entitySet)
        { 
            if (!object.ReferenceEquals(RecordType.EdmType, null) && 
                !object.ReferenceEquals(_entityKey, EntityKey.EntityNotValidKey) &&
                !object.ReferenceEquals(_entityKey, EntityKey.NoEntitySetKey) && 
                !object.ReferenceEquals(RecordType.EdmType, entitySet.ElementType) &&
                !entitySet.ElementType.IsBaseTypeOf(RecordType.EdmType))
            {
                throw EntityUtil.Argument(System.Data.Entity.Strings.EntityTypesDoNotAgree); 
            }
        } 
    } 
}

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

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