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
- NetworkCredential.cs
- DesignerOptionService.cs
- SoapElementAttribute.cs
- DescendentsWalkerBase.cs
- CodeGeneratorOptions.cs
- Point3DConverter.cs
- SortKey.cs
- ReliableSession.cs
- ActivityIdHeader.cs
- UpWmlMobileTextWriter.cs
- RotateTransform.cs
- EditingCommands.cs
- BitmapEffect.cs
- MatrixUtil.cs
- ContainerControl.cs
- DataMember.cs
- ArraySortHelper.cs
- StrokeNodeEnumerator.cs
- GridViewAutoFormat.cs
- DbParameterCollectionHelper.cs
- ErrorEventArgs.cs
- LabelInfo.cs
- LayoutEvent.cs
- XappLauncher.cs
- Vertex.cs
- coordinatorscratchpad.cs
- AxParameterData.cs
- ImageMap.cs
- IgnoreDeviceFilterElementCollection.cs
- TimelineGroup.cs
- XmlSchemaAttributeGroupRef.cs
- DataListCommandEventArgs.cs
- CompleteWizardStep.cs
- AddInSegmentDirectoryNotFoundException.cs
- SuspendDesigner.cs
- HtmlInputFile.cs
- UmAlQuraCalendar.cs
- ControlCachePolicy.cs
- AssemblySettingAttributes.cs
- ZipIOLocalFileBlock.cs
- DataSetSchema.cs
- WebBrowserNavigatingEventHandler.cs
- BindingList.cs
- MatchingStyle.cs
- RootBrowserWindow.cs
- AccessedThroughPropertyAttribute.cs
- ErrorWebPart.cs
- CustomCategoryAttribute.cs
- CapabilitiesState.cs
- _LocalDataStoreMgr.cs
- CodeGenerator.cs
- MulticastNotSupportedException.cs
- OracleException.cs
- SqlConnection.cs
- AttachmentService.cs
- RelationshipDetailsRow.cs
- XmlSchemaElement.cs
- SafeNativeMemoryHandle.cs
- TrustSection.cs
- ParserStreamGeometryContext.cs
- SoapFault.cs
- ApplicationActivator.cs
- EdmConstants.cs
- Block.cs
- ScrollEvent.cs
- QueryBranchOp.cs
- VoiceSynthesis.cs
- SqlStatistics.cs
- DataError.cs
- Memoizer.cs
- ListChangedEventArgs.cs
- SymLanguageType.cs
- Constants.cs
- CodeTypeMemberCollection.cs
- AbstractExpressions.cs
- BinaryWriter.cs
- ManageRequest.cs
- DoubleLinkList.cs
- QueryConverter.cs
- Base64Decoder.cs
- SlotInfo.cs
- ASCIIEncoding.cs
- ProviderUtil.cs
- InternalControlCollection.cs
- Stack.cs
- ResumeStoryboard.cs
- IDQuery.cs
- ColumnHeaderConverter.cs
- DbConnectionPoolIdentity.cs
- DataGridTable.cs
- MissingMethodException.cs
- Error.cs
- PatternMatcher.cs
- BypassElementCollection.cs
- StringDictionaryWithComparer.cs
- GeneralTransform3DGroup.cs
- TrackingServices.cs
- XmlCompatibilityReader.cs
- DocumentSequenceHighlightLayer.cs
- WsdlInspector.cs