Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / ndp / fx / src / DataEntity / System / Data / Map / Update / Internal / AssociationSetMetadata.cs / 1 / AssociationSetMetadata.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Data.Metadata.Edm; using System.Data.Common.Utils; using System.Data.Common.CommandTrees; using System.Collections.Generic; using System.Linq; namespace System.Data.Mapping.Update.Internal { ////// Encapsulates information about ends of an association set needed to correctly /// interpret updates. /// internal class AssociationSetMetadata { ////// Gets association ends that must be modified if the association /// is changed (e.g. the mapping of the association is conditioned /// on some property of the end) /// internal readonly SetRequiredEnds; /// /// Gets association ends that may be implicitly modified as a result /// of changes to the association (e.g. collocated entity with server /// generated value) /// internal readonly SetOptionalEnds; /// /// Gets association ends whose values may influence the association /// (e.g. where there is a ReferentialIntegrity or "common value" constraint) /// internal readonly SetIncludedValueEnds; /// /// true iff. there are interesting ends for this association set. /// internal bool HasEnds { get { return 0 < RequiredEnds.Count || 0 < OptionalEnds.Count || 0 < IncludedValueEnds.Count; } } ////// Initialize Metadata for an AssociationSet /// internal AssociationSetMetadata(SetaffectedTables, AssociationSet associationSet, MetadataWorkspace workspace) { // If there is only 1 table, there can be no ambiguity about the "destination" of a relationship, so such // sets are not typically required. bool isRequired = 1 < affectedTables.Count; // determine the ends of the relationship var ends = associationSet.AssociationSetEnds; // find collocated entities foreach (EntitySet table in affectedTables) { // Find extents influencing the table DbQueryCommandTree updateMappingView = (DbQueryCommandTree)workspace.GetCqtView(table); var influencingExtents = EntitySetRetriever.GetEntitySets(updateMappingView.Query); foreach (EntitySet influencingExtent in influencingExtents) { foreach (var end in ends) { // If the extent is an end of the relationship and we haven't already added it to the // required set... if (end.EntitySet.EdmEquals(influencingExtent)) { if (isRequired) { AddEnd(ref RequiredEnds, end.CorrespondingAssociationEndMember); } else if (null == RequiredEnds || !RequiredEnds.Contains(end.CorrespondingAssociationEndMember)) { AddEnd(ref OptionalEnds, end.CorrespondingAssociationEndMember); } } } } } // fix Required and Optional sets FixSet(ref RequiredEnds); FixSet(ref OptionalEnds); // for associations with referential constraints, the principal end is always interesting // since its key values may take precedence over the key values of the dependent end foreach (ReferentialConstraint constraint in associationSet.ElementType.ReferentialConstraints) { // FromRole is the principal end in the referential constraint AssociationEndMember principalEnd = (AssociationEndMember)constraint.FromRole; if (!RequiredEnds.Contains(principalEnd) && !OptionalEnds.Contains(principalEnd)) { AddEnd(ref IncludedValueEnds, principalEnd); } } FixSet(ref IncludedValueEnds); } /// /// Initialize given required ends. /// internal AssociationSetMetadata(IEnumerablerequiredEnds) { if (requiredEnds.Any()) { RequiredEnds = new Set (requiredEnds); } FixSet(ref RequiredEnds); FixSet(ref OptionalEnds); FixSet(ref IncludedValueEnds); } static private void AddEnd(ref Set set, AssociationEndMember element) { if (null == set) { set = new Set (); } set.Add(element); } static private void FixSet(ref Set set) { if (null == set) { set = Set .Empty; } else { set.MakeReadOnly(); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Data.Metadata.Edm; using System.Data.Common.Utils; using System.Data.Common.CommandTrees; using System.Collections.Generic; using System.Linq; namespace System.Data.Mapping.Update.Internal { ////// Encapsulates information about ends of an association set needed to correctly /// interpret updates. /// internal class AssociationSetMetadata { ////// Gets association ends that must be modified if the association /// is changed (e.g. the mapping of the association is conditioned /// on some property of the end) /// internal readonly SetRequiredEnds; /// /// Gets association ends that may be implicitly modified as a result /// of changes to the association (e.g. collocated entity with server /// generated value) /// internal readonly SetOptionalEnds; /// /// Gets association ends whose values may influence the association /// (e.g. where there is a ReferentialIntegrity or "common value" constraint) /// internal readonly SetIncludedValueEnds; /// /// true iff. there are interesting ends for this association set. /// internal bool HasEnds { get { return 0 < RequiredEnds.Count || 0 < OptionalEnds.Count || 0 < IncludedValueEnds.Count; } } ////// Initialize Metadata for an AssociationSet /// internal AssociationSetMetadata(SetaffectedTables, AssociationSet associationSet, MetadataWorkspace workspace) { // If there is only 1 table, there can be no ambiguity about the "destination" of a relationship, so such // sets are not typically required. bool isRequired = 1 < affectedTables.Count; // determine the ends of the relationship var ends = associationSet.AssociationSetEnds; // find collocated entities foreach (EntitySet table in affectedTables) { // Find extents influencing the table DbQueryCommandTree updateMappingView = (DbQueryCommandTree)workspace.GetCqtView(table); var influencingExtents = EntitySetRetriever.GetEntitySets(updateMappingView.Query); foreach (EntitySet influencingExtent in influencingExtents) { foreach (var end in ends) { // If the extent is an end of the relationship and we haven't already added it to the // required set... if (end.EntitySet.EdmEquals(influencingExtent)) { if (isRequired) { AddEnd(ref RequiredEnds, end.CorrespondingAssociationEndMember); } else if (null == RequiredEnds || !RequiredEnds.Contains(end.CorrespondingAssociationEndMember)) { AddEnd(ref OptionalEnds, end.CorrespondingAssociationEndMember); } } } } } // fix Required and Optional sets FixSet(ref RequiredEnds); FixSet(ref OptionalEnds); // for associations with referential constraints, the principal end is always interesting // since its key values may take precedence over the key values of the dependent end foreach (ReferentialConstraint constraint in associationSet.ElementType.ReferentialConstraints) { // FromRole is the principal end in the referential constraint AssociationEndMember principalEnd = (AssociationEndMember)constraint.FromRole; if (!RequiredEnds.Contains(principalEnd) && !OptionalEnds.Contains(principalEnd)) { AddEnd(ref IncludedValueEnds, principalEnd); } } FixSet(ref IncludedValueEnds); } /// /// Initialize given required ends. /// internal AssociationSetMetadata(IEnumerablerequiredEnds) { if (requiredEnds.Any()) { RequiredEnds = new Set (requiredEnds); } FixSet(ref RequiredEnds); FixSet(ref OptionalEnds); FixSet(ref IncludedValueEnds); } static private void AddEnd(ref Set set, AssociationEndMember element) { if (null == set) { set = new Set (); } set.Add(element); } static private void FixSet(ref Set set) { if (null == set) { set = Set .Empty; } else { set.MakeReadOnly(); } } } } // 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
- documentsequencetextcontainer.cs
- RepeaterItem.cs
- SchemaCollectionPreprocessor.cs
- Style.cs
- AdapterDictionary.cs
- CodeMemberField.cs
- basenumberconverter.cs
- WebControlsSection.cs
- XmlSchemaSimpleContentExtension.cs
- GcHandle.cs
- EnumBuilder.cs
- Attribute.cs
- PolicyLevel.cs
- Item.cs
- FormViewUpdateEventArgs.cs
- FamilyTypefaceCollection.cs
- XmlSerializableReader.cs
- FormViewDeleteEventArgs.cs
- Int16.cs
- SecurityUtils.cs
- ExpressionDumper.cs
- DoubleLinkList.cs
- Visual3D.cs
- FixedBufferAttribute.cs
- ForeignConstraint.cs
- WindowsEditBoxRange.cs
- PtsHost.cs
- ChildDocumentBlock.cs
- BmpBitmapDecoder.cs
- XpsStructure.cs
- WebPartTransformerAttribute.cs
- ListParagraph.cs
- PrimitiveDataContract.cs
- ExecutedRoutedEventArgs.cs
- XomlCompilerResults.cs
- Camera.cs
- SqlUserDefinedTypeAttribute.cs
- CanonicalizationDriver.cs
- Emitter.cs
- WebServiceData.cs
- SelectorItemAutomationPeer.cs
- WpfKnownType.cs
- RowParagraph.cs
- XmlLoader.cs
- WeakHashtable.cs
- ArglessEventHandlerProxy.cs
- TemplatePagerField.cs
- TextEditorSelection.cs
- ManipulationBoundaryFeedbackEventArgs.cs
- CommandEventArgs.cs
- HtmlInputHidden.cs
- DigitShape.cs
- StandardCommands.cs
- SiteMapNodeCollection.cs
- XmlQualifiedNameTest.cs
- TypeConverterHelper.cs
- DataSourceCacheDurationConverter.cs
- DataGridViewRowsRemovedEventArgs.cs
- ComponentFactoryHelpers.cs
- TypeReference.cs
- CompositeControlDesigner.cs
- ObjectParameter.cs
- ListItemsCollectionEditor.cs
- LinkDesigner.cs
- ListBoxItemWrapperAutomationPeer.cs
- WeakReferenceKey.cs
- XmlMtomReader.cs
- DeviceContexts.cs
- Stackframe.cs
- TrackingProvider.cs
- LockCookie.cs
- TransformCryptoHandle.cs
- BezierSegment.cs
- Pointer.cs
- DeclarativeCatalogPart.cs
- CodeEntryPointMethod.cs
- OleDbParameter.cs
- LocalBuilder.cs
- ObjectKeyFrameCollection.cs
- RadioButtonRenderer.cs
- SqlResolver.cs
- DataGridViewSelectedCellCollection.cs
- Debug.cs
- WebReferencesBuildProvider.cs
- Property.cs
- EntityDataSourceReferenceGroup.cs
- TransformerConfigurationWizardBase.cs
- SqlRowUpdatedEvent.cs
- HttpDictionary.cs
- DateTimeSerializationSection.cs
- ValidationError.cs
- XmlSchemaAttributeGroup.cs
- ImmutableObjectAttribute.cs
- AtomPub10CategoriesDocumentFormatter.cs
- Transform3DCollection.cs
- OLEDB_Util.cs
- AsnEncodedData.cs
- XmlElementAttributes.cs
- LoginViewDesigner.cs
- SHA1.cs