Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Metadata / Edm / EntitySet.cs / 1305376 / EntitySet.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Text; using System.Diagnostics; using System.Threading; using System.Data.Common.Utils; using System.Collections.ObjectModel; namespace System.Data.Metadata.Edm { ////// concrete Class for representing a entity set /// public class EntitySet : EntitySetBase { #region Constructors ////// The constructor for constructing the EntitySet with a given name and an entity type /// /// The name of the EntitySet /// The db schema /// The db table /// The provider specific query that should be used to retrieve the EntitySet /// The entity type of the entities that this entity set type contains ///Thrown if the argument name or entityType is null internal EntitySet(string name, string schema, string table, string definingQuery, EntityType entityType) : base(name, schema, table, definingQuery, entityType) { } #endregion #region Fields private ReadOnlyCollection> _foreignKeyDependents; private ReadOnlyCollection > _foreignKeyPrincipals; private volatile bool _hasForeignKeyRelationships; private volatile bool _hasIndependentRelationships; #endregion #region Properties /// /// Returns the kind of the type /// public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.EntitySet; } } ////// Gets/Sets the entity type of this entity set /// public new EntityType ElementType { get { return (EntityType)base.ElementType; } } ////// Returns the associations and constraints where "this" EntitySet particpates as the Principal end. /// From the results of this list, you can retrieve the Dependent IRelatedEnds /// internal ReadOnlyCollection> ForeignKeyDependents { get { if (_foreignKeyDependents == null) { InitializeForeignKeyLists(); } return _foreignKeyDependents; } } /// /// Returns the associations and constraints where "this" EntitySet particpates as the Dependent end. /// From the results of this list, you can retrieve the Principal IRelatedEnds /// internal ReadOnlyCollection> ForeignKeyPrincipals { get { if (_foreignKeyPrincipals == null) { InitializeForeignKeyLists(); } return _foreignKeyPrincipals; } } /// /// True if this entity set participates in any foreign key relationships, otherwise false. /// internal bool HasForeignKeyRelationships { get { if (_foreignKeyPrincipals == null) { InitializeForeignKeyLists(); } return _hasForeignKeyRelationships; } } ////// True if this entity set participates in any independent relationships, otherwise false. /// internal bool HasIndependentRelationships { get { if (_foreignKeyPrincipals == null) { InitializeForeignKeyLists(); } return _hasIndependentRelationships; } } #endregion #region Methods private void InitializeForeignKeyLists() { var dependents = new List>(); var principals = new List >(); bool foundFkRelationship = false; bool foundIndependentRelationship = false; foreach (AssociationSet associationSet in MetadataHelper.GetAssociationsForEntitySet(this)) { if (associationSet.ElementType.IsForeignKey) { foundFkRelationship = true; Debug.Assert(associationSet.ElementType.ReferentialConstraints.Count == 1, "Expected exactly one constraint for FK"); ReferentialConstraint constraint = associationSet.ElementType.ReferentialConstraints[0]; if (constraint.ToRole.GetEntityType().IsAssignableFrom(this.ElementType) || this.ElementType.IsAssignableFrom(constraint.ToRole.GetEntityType())) { // Dependents dependents.Add(new Tuple (associationSet, constraint)); } if (constraint.FromRole.GetEntityType().IsAssignableFrom(this.ElementType) || this.ElementType.IsAssignableFrom(constraint.FromRole.GetEntityType())) { // Principals principals.Add(new Tuple (associationSet, constraint)); } } else { foundIndependentRelationship = true; } } _hasForeignKeyRelationships = foundFkRelationship; _hasIndependentRelationships = foundIndependentRelationship; var readOnlyDependents = dependents.AsReadOnly(); var readOnlyPrincipals = principals.AsReadOnly(); Interlocked.CompareExchange(ref _foreignKeyDependents, readOnlyDependents, null); Interlocked.CompareExchange(ref _foreignKeyPrincipals, readOnlyPrincipals, null); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Text; using System.Diagnostics; using System.Threading; using System.Data.Common.Utils; using System.Collections.ObjectModel; namespace System.Data.Metadata.Edm { ////// concrete Class for representing a entity set /// public class EntitySet : EntitySetBase { #region Constructors ////// The constructor for constructing the EntitySet with a given name and an entity type /// /// The name of the EntitySet /// The db schema /// The db table /// The provider specific query that should be used to retrieve the EntitySet /// The entity type of the entities that this entity set type contains ///Thrown if the argument name or entityType is null internal EntitySet(string name, string schema, string table, string definingQuery, EntityType entityType) : base(name, schema, table, definingQuery, entityType) { } #endregion #region Fields private ReadOnlyCollection> _foreignKeyDependents; private ReadOnlyCollection > _foreignKeyPrincipals; private volatile bool _hasForeignKeyRelationships; private volatile bool _hasIndependentRelationships; #endregion #region Properties /// /// Returns the kind of the type /// public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.EntitySet; } } ////// Gets/Sets the entity type of this entity set /// public new EntityType ElementType { get { return (EntityType)base.ElementType; } } ////// Returns the associations and constraints where "this" EntitySet particpates as the Principal end. /// From the results of this list, you can retrieve the Dependent IRelatedEnds /// internal ReadOnlyCollection> ForeignKeyDependents { get { if (_foreignKeyDependents == null) { InitializeForeignKeyLists(); } return _foreignKeyDependents; } } /// /// Returns the associations and constraints where "this" EntitySet particpates as the Dependent end. /// From the results of this list, you can retrieve the Principal IRelatedEnds /// internal ReadOnlyCollection> ForeignKeyPrincipals { get { if (_foreignKeyPrincipals == null) { InitializeForeignKeyLists(); } return _foreignKeyPrincipals; } } /// /// True if this entity set participates in any foreign key relationships, otherwise false. /// internal bool HasForeignKeyRelationships { get { if (_foreignKeyPrincipals == null) { InitializeForeignKeyLists(); } return _hasForeignKeyRelationships; } } ////// True if this entity set participates in any independent relationships, otherwise false. /// internal bool HasIndependentRelationships { get { if (_foreignKeyPrincipals == null) { InitializeForeignKeyLists(); } return _hasIndependentRelationships; } } #endregion #region Methods private void InitializeForeignKeyLists() { var dependents = new List>(); var principals = new List >(); bool foundFkRelationship = false; bool foundIndependentRelationship = false; foreach (AssociationSet associationSet in MetadataHelper.GetAssociationsForEntitySet(this)) { if (associationSet.ElementType.IsForeignKey) { foundFkRelationship = true; Debug.Assert(associationSet.ElementType.ReferentialConstraints.Count == 1, "Expected exactly one constraint for FK"); ReferentialConstraint constraint = associationSet.ElementType.ReferentialConstraints[0]; if (constraint.ToRole.GetEntityType().IsAssignableFrom(this.ElementType) || this.ElementType.IsAssignableFrom(constraint.ToRole.GetEntityType())) { // Dependents dependents.Add(new Tuple (associationSet, constraint)); } if (constraint.FromRole.GetEntityType().IsAssignableFrom(this.ElementType) || this.ElementType.IsAssignableFrom(constraint.FromRole.GetEntityType())) { // Principals principals.Add(new Tuple (associationSet, constraint)); } } else { foundIndependentRelationship = true; } } _hasForeignKeyRelationships = foundFkRelationship; _hasIndependentRelationships = foundIndependentRelationship; var readOnlyDependents = dependents.AsReadOnly(); var readOnlyPrincipals = principals.AsReadOnly(); Interlocked.CompareExchange(ref _foreignKeyDependents, readOnlyDependents, null); Interlocked.CompareExchange(ref _foreignKeyPrincipals, readOnlyPrincipals, null); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- OleDbError.cs
- FileDataSourceCache.cs
- SqlNode.cs
- GreaterThan.cs
- OleDbFactory.cs
- Relationship.cs
- StringSorter.cs
- ViewBase.cs
- SqlParameterCollection.cs
- ExceptionRoutedEventArgs.cs
- XmlArrayItemAttributes.cs
- brushes.cs
- DecoratedNameAttribute.cs
- SupportingTokenListenerFactory.cs
- InternalBufferOverflowException.cs
- StrongNameUtility.cs
- OleDbConnectionInternal.cs
- ViewManagerAttribute.cs
- _TLSstream.cs
- ToolStripItemTextRenderEventArgs.cs
- Facet.cs
- KeyboardNavigation.cs
- ReachNamespaceInfo.cs
- DataGridViewColumnCollectionEditor.cs
- LogReserveAndAppendState.cs
- ParameterCollection.cs
- SizeConverter.cs
- Transaction.cs
- Odbc32.cs
- PreviewPrintController.cs
- SiteOfOriginPart.cs
- LogExtent.cs
- EntityDescriptor.cs
- BinaryUtilClasses.cs
- DLinqColumnProvider.cs
- ReflectionHelper.cs
- PresentationAppDomainManager.cs
- StaticFileHandler.cs
- HttpVersion.cs
- SqlRowUpdatedEvent.cs
- AutomationEvent.cs
- SynchronizationFilter.cs
- GlobalItem.cs
- StylusOverProperty.cs
- RowBinding.cs
- CompensationToken.cs
- util.cs
- CorruptingExceptionCommon.cs
- MouseCaptureWithinProperty.cs
- ContentPlaceHolder.cs
- DataGridViewRowPostPaintEventArgs.cs
- ValidateNames.cs
- CapacityStreamGeometryContext.cs
- DataGridViewCellContextMenuStripNeededEventArgs.cs
- PartialToken.cs
- XmlnsCompatibleWithAttribute.cs
- UTF7Encoding.cs
- SamlConditions.cs
- wgx_render.cs
- FSWPathEditor.cs
- SqlExpressionNullability.cs
- ProcessStartInfo.cs
- SafeNativeMethods.cs
- DictionaryContent.cs
- ElementAtQueryOperator.cs
- TypeUsageBuilder.cs
- HierarchicalDataBoundControlAdapter.cs
- TextChange.cs
- OracleConnectionFactory.cs
- PackageRelationshipCollection.cs
- RouteParametersHelper.cs
- TraceContextRecord.cs
- RecognizedWordUnit.cs
- NegationPusher.cs
- XmlObjectSerializerReadContextComplex.cs
- XmlDictionaryReaderQuotas.cs
- ImageCodecInfo.cs
- UrlAuthorizationModule.cs
- AuthenticationService.cs
- DrawTreeNodeEventArgs.cs
- StructuralCache.cs
- SqlBooleanizer.cs
- OneToOneMappingSerializer.cs
- ScalarType.cs
- ChangeTracker.cs
- CalculatedColumn.cs
- ContractMapping.cs
- PrePostDescendentsWalker.cs
- WebPartMenu.cs
- SoapSchemaImporter.cs
- RootDesignerSerializerAttribute.cs
- OutputCacheProfile.cs
- SizeFConverter.cs
- AccessibleObject.cs
- OSFeature.cs
- LinqDataSourceHelper.cs
- NativeWindow.cs
- XmlHierarchicalEnumerable.cs
- RowBinding.cs
- CqlLexerHelpers.cs