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//------------------------------------------------------------------------------
// <copyright file="EntityRecordInfo.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Data.Common {
using System.Collections.Generic;
using System.Data;
using System.Data.Metadata.Edm;
using System.Diagnostics;
/// <summary>
/// EntityRecordInfo class providing a simple way to access both the type information and the column information.
/// </summary>
public class EntityRecordInfo : DataRecordInfo {
private readonly EntityKey _entityKey;
private readonly EntitySet _entitySet;
/// <summary>
///
/// </summary>
/// <param name="metadata"></param>
/// <param name="memberInfo"></param>
/// <param name="entityKey"></param>
public EntityRecordInfo(EntityType metadata, IEnumerable<EdmMember> memberInfo, EntityKey entityKey, EntitySet entitySet)
: base(TypeUsage.Create(metadata), memberInfo) {
EntityUtil.CheckArgumentNull<EntityKey>(entityKey, "entityKey");
EntityUtil.CheckArgumentNull(entitySet, "entitySet");
_entityKey = entityKey;
_entitySet = entitySet;
ValidateEntityType(entitySet);
}
/// <summary>
///
/// </summary>
/// <param name="metadata"></param>
/// <param name="entityKey"></param>
internal EntityRecordInfo(EntityType metadata, EntityKey entityKey, EntitySet entitySet)
: base(TypeUsage.Create(metadata)) {
EntityUtil.CheckArgumentNull<EntityKey>(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
}
/// <summary>
/// Reusing TypeUsage and FieldMetadata from another EntityRecordInfo which has all the same info
/// but with a different EntityKey instance.
/// </summary>
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
}
/// <summary>
/// the EntityKey
/// </summary>
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);
}
}
}
}
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