Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Objects / ObjectStateManagerMetadata.cs / 1305376 / ObjectStateManagerMetadata.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Data.Common; using System.Data.Metadata.Edm; using System.Data.Mapping; using System.Diagnostics; namespace System.Data.Objects { internal struct EntitySetQualifiedType : IEqualityComparer{ internal static readonly IEqualityComparer EqualityComparer = new EntitySetQualifiedType(); internal readonly Type ClrType; internal readonly EntitySet EntitySet; internal EntitySetQualifiedType(Type type, EntitySet set) { Debug.Assert(null != type, "null Type"); Debug.Assert(null != set, "null EntitySet"); Debug.Assert(null != set.EntityContainer, "null EntityContainer"); Debug.Assert(null != set.EntityContainer.Name, "null EntityContainer.Name"); ClrType = EntityUtil.GetEntityIdentityType(type); EntitySet = set; } public bool Equals(EntitySetQualifiedType x, EntitySetQualifiedType y) { return (Object.ReferenceEquals(x.ClrType, y.ClrType) && Object.ReferenceEquals(x.EntitySet, y.EntitySet)); } public int GetHashCode(EntitySetQualifiedType obj) { return unchecked(obj.ClrType.GetHashCode() + obj.EntitySet.Name.GetHashCode() + obj.EntitySet.EntityContainer.Name.GetHashCode()); } } internal sealed class StateManagerMemberMetadata { private readonly EdmProperty _clrProperty; // may be null if shadowState private readonly EdmProperty _edmProperty; private readonly bool _isPartOfKey; private readonly bool _isComplexType; internal StateManagerMemberMetadata(ObjectPropertyMapping memberMap, EdmProperty memberMetadata, bool isPartOfKey) { // if memberMap is null, then this is a shadowstate Debug.Assert(null != memberMap, "shadowstate not supported"); Debug.Assert(null != memberMetadata, "CSpace should never be null"); _clrProperty = memberMap.ClrProperty; _edmProperty = memberMetadata; _isPartOfKey = isPartOfKey; _isComplexType = (Helper.IsEntityType(_edmProperty.TypeUsage.EdmType) || Helper.IsComplexType(_edmProperty.TypeUsage.EdmType)); } internal string CLayerName { get { return _edmProperty.Name; } } internal Type ClrType { get { Debug.Assert(null != _clrProperty, "shadowstate not supported"); return _clrProperty.TypeUsage.EdmType.ClrType; //return ((null != _clrProperty) // ? _clrProperty.TypeUsage.EdmType.ClrType // : (Helper.IsComplexType(_edmProperty) // ? typeof(DbDataRecord) // : ((PrimitiveType)_edmProperty.TypeUsage.EdmType).ClrEquivalentType)); } } internal bool IsComplex { get { return _isComplexType; } } internal EdmProperty CdmMetadata { get { return _edmProperty; } } internal EdmProperty ClrMetadata { get { Debug.Assert(null != _clrProperty, "shadowstate not supported"); return _clrProperty; } } internal bool IsPartOfKey { get { return _isPartOfKey; } } public object GetValue(object userObject) // wrapp it in cacheentry { Debug.Assert(null != _clrProperty, "shadowstate not supported"); object dataObject = LightweightCodeGenerator.GetValue(_clrProperty, userObject); return dataObject; } public void SetValue(object userObject, object value) // if record , unwrapp to object, use materializer in cacheentry { Debug.Assert(null != _clrProperty, "shadowstate not supported"); if (DBNull.Value == value) { value = null; } if (IsComplex && value == null) { throw EntityUtil.NullableComplexTypesNotSupported(CLayerName); } LightweightCodeGenerator.SetValue(_clrProperty, userObject, value); } } internal sealed class StateManagerTypeMetadata { private readonly TypeUsage _typeUsage; // CSpace private readonly ObjectTypeMapping _ocObjectMap; private readonly StateManagerMemberMetadata[] _members; private readonly Dictionary _objectNameToOrdinal; private readonly Dictionary _cLayerNameToOrdinal; private readonly DataRecordInfo _recordInfo; internal StateManagerTypeMetadata(EdmType edmType, ObjectTypeMapping mapping) { Debug.Assert(null != edmType, "null EdmType"); Debug.Assert(Helper.IsEntityType(edmType) || Helper.IsComplexType(edmType), "not Complex or EntityType"); Debug.Assert(Object.ReferenceEquals(mapping, null) || Object.ReferenceEquals(mapping.EdmType, edmType), "different EdmType instance"); _typeUsage = TypeUsage.Create(edmType); _recordInfo = new DataRecordInfo(_typeUsage); _ocObjectMap = mapping; ReadOnlyMetadataCollection members = TypeHelpers.GetProperties(edmType); _members = new StateManagerMemberMetadata[members.Count]; _objectNameToOrdinal = new Dictionary (members.Count); _cLayerNameToOrdinal = new Dictionary (members.Count); ReadOnlyMetadataCollection keyMembers = null; if (Helper.IsEntityType(edmType)) { keyMembers = ((EntityType)edmType).KeyMembers; } for (int i = 0; i < _members.Length; ++i) { EdmProperty member = members[i]; ObjectPropertyMapping memberMap = null; if (null != mapping) { memberMap = mapping.GetPropertyMap(member.Name); if (null != memberMap) { _objectNameToOrdinal.Add(memberMap.ClrProperty.Name, i); // olayer name } } _cLayerNameToOrdinal.Add(member.Name, i); // clayer name // Determine whether this member is part of the identity of the entity. _members[i] = new StateManagerMemberMetadata(memberMap, member, ((null != keyMembers) && keyMembers.Contains(member))); } } internal TypeUsage CdmMetadata { get { return _typeUsage; } } internal DataRecordInfo DataRecordInfo { get { return _recordInfo; } } internal int FieldCount { get { return _members.Length; } } internal Type GetFieldType(int ordinal) { return Member(ordinal).ClrType; } internal StateManagerMemberMetadata Member(int ordinal) { if (unchecked((uint)ordinal < (uint)_members.Length)) { return _members[ordinal]; } throw EntityUtil.ArgumentOutOfRange("ordinal"); } internal string CLayerMemberName(int ordinal) { return Member(ordinal).CLayerName; } internal int GetOrdinalforOLayerMemberName(string name) { int ordinal; if (String.IsNullOrEmpty(name) || !_objectNameToOrdinal.TryGetValue(name, out ordinal)) { ordinal = -1; } return ordinal; } internal int GetOrdinalforCLayerMemberName(string name) { int ordinal; if (String.IsNullOrEmpty(name) || !_cLayerNameToOrdinal.TryGetValue(name, out ordinal)) { ordinal = -1; } return ordinal; } internal bool IsMemberPartofShadowState(int ordinal) { // Debug.Assert(Member(ordinal) != null, "The only case where Member(ordinal) can be null is if the property is in shadow state. " + "When shadow state support is added, this assert should never fire."); return (null == Member(ordinal).ClrMetadata); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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