Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Query / InternalTrees / relpropertyhelper.cs / 1305376 / relpropertyhelper.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Globalization; using System.Diagnostics; using System.Data.Common; using System.Data.Metadata.Edm; namespace System.Data.Query.InternalTrees { ////// A "Rel" property is best thought of as a collocated reference (aka foreign key). /// Any entity may have zero or more rel-properties carried along with it (purely /// as a means to optimize for common relationship traversal scenarios) /// /// Although the definition is lax here, we only deal with RelProperties that /// are one-ended (ie) the target multiplicity is at most One. /// /// Consider for example, an Order entity with a (N:1) Order-Customer relationship. The Customer ref /// will be treated as a rel property for the Order entity. /// Similarly, the OrderLine entity may have an Order ref rel property (assuming that there was /// a N:1 relationship between OrderLine and Order) /// internal sealed class RelProperty { #region private state private readonly RelationshipType m_relationshipType; private readonly RelationshipEndMember m_fromEnd; private readonly RelationshipEndMember m_toEnd; #endregion #region constructors internal RelProperty(RelationshipType relationshipType, RelationshipEndMember fromEnd, RelationshipEndMember toEnd) { m_relationshipType = relationshipType; m_fromEnd = fromEnd; m_toEnd = toEnd; } #endregion #region public APIs ////// The relationship /// public RelationshipType Relationship { get { return m_relationshipType; } } ////// The source end of the relationship /// public RelationshipEndMember FromEnd { get { return m_fromEnd; } } ////// the target end of the relationship /// public RelationshipEndMember ToEnd { get { return m_toEnd; } } ////// Our definition of equality /// /// ///public override bool Equals(object obj) { RelProperty other = obj as RelProperty; return (other != null && this.Relationship.EdmEquals(other.Relationship) && this.FromEnd.EdmEquals(other.FromEnd) && this.ToEnd.EdmEquals(other.ToEnd)); } /// /// our hash code /// ///public override int GetHashCode() { return this.ToEnd.Identity.GetHashCode(); } /// /// String form /// ///[DebuggerNonUserCode] public override string ToString() { return m_relationshipType.ToString() + ":" + m_fromEnd.ToString() + ":" + m_toEnd.ToString(); } #endregion } /// /// A helper class for all rel-properties /// internal sealed class RelPropertyHelper { #region private state private Dictionary> _relPropertyMap; private HashSet _interestingRelProperties; #endregion #region private methods /// /// Add the rel property induced by the specified relationship, (if the target /// end has a multiplicity of one) /// We only keep track of rel-properties that are "interesting" /// /// the association relationship /// source end of the relationship traversal /// target end of the traversal private void AddRelProperty(AssociationType associationType, AssociationEndMember fromEnd, AssociationEndMember toEnd) { if (toEnd.RelationshipMultiplicity == RelationshipMultiplicity.Many) { return; } RelProperty prop = new RelProperty(associationType, fromEnd, toEnd); if (_interestingRelProperties == null || !_interestingRelProperties.Contains(prop)) { return; } EntityTypeBase entityType = (EntityTypeBase)((RefType)fromEnd.TypeUsage.EdmType).ElementType; ListpropList; if (!_relPropertyMap.TryGetValue(entityType, out propList)) { propList = new List (); _relPropertyMap[entityType] = propList; } propList.Add(prop); } /// /// Add any rel properties that are induced by the supplied relationship /// /// the relationship private void ProcessRelationship(RelationshipType relationshipType) { AssociationType associationType = relationshipType as AssociationType; if (associationType == null) { return; } // Handle only binary associations if (associationType.AssociationEndMembers.Count != 2) { return; } AssociationEndMember end0 = associationType.AssociationEndMembers[0]; AssociationEndMember end1 = associationType.AssociationEndMembers[1]; AddRelProperty(associationType, end0, end1); AddRelProperty(associationType, end1, end0); } #endregion #region constructors internal RelPropertyHelper(MetadataWorkspace ws, HashSetinterestingRelProperties) { _relPropertyMap = new Dictionary >(); _interestingRelProperties = interestingRelProperties; foreach (RelationshipType relationshipType in ws.GetItems (DataSpace.CSpace)) { ProcessRelationship(relationshipType); } } #endregion #region public APIs /// /// Get the rel properties declared by this type (and *not* by any of its subtypes) /// /// the entity type ///set of rel properties declared for this type internal IEnumerableGetDeclaredOnlyRelProperties(EntityTypeBase entityType) { List relProperties; if (_relPropertyMap.TryGetValue(entityType, out relProperties)) { foreach (RelProperty p in relProperties) { yield return p; } } yield break; } /// /// Get the rel-properties of this entity and its supertypes (starting from the root) /// /// the entity type ///set of rel-properties for this entity type (and its supertypes) internal IEnumerableGetRelProperties(EntityTypeBase entityType) { if (entityType.BaseType != null) { foreach (RelProperty p in GetRelProperties(entityType.BaseType as EntityTypeBase)) { yield return p; } } foreach (RelProperty p in GetDeclaredOnlyRelProperties(entityType)) { yield return p; } } #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.Globalization; using System.Diagnostics; using System.Data.Common; using System.Data.Metadata.Edm; namespace System.Data.Query.InternalTrees { ////// A "Rel" property is best thought of as a collocated reference (aka foreign key). /// Any entity may have zero or more rel-properties carried along with it (purely /// as a means to optimize for common relationship traversal scenarios) /// /// Although the definition is lax here, we only deal with RelProperties that /// are one-ended (ie) the target multiplicity is at most One. /// /// Consider for example, an Order entity with a (N:1) Order-Customer relationship. The Customer ref /// will be treated as a rel property for the Order entity. /// Similarly, the OrderLine entity may have an Order ref rel property (assuming that there was /// a N:1 relationship between OrderLine and Order) /// internal sealed class RelProperty { #region private state private readonly RelationshipType m_relationshipType; private readonly RelationshipEndMember m_fromEnd; private readonly RelationshipEndMember m_toEnd; #endregion #region constructors internal RelProperty(RelationshipType relationshipType, RelationshipEndMember fromEnd, RelationshipEndMember toEnd) { m_relationshipType = relationshipType; m_fromEnd = fromEnd; m_toEnd = toEnd; } #endregion #region public APIs ////// The relationship /// public RelationshipType Relationship { get { return m_relationshipType; } } ////// The source end of the relationship /// public RelationshipEndMember FromEnd { get { return m_fromEnd; } } ////// the target end of the relationship /// public RelationshipEndMember ToEnd { get { return m_toEnd; } } ////// Our definition of equality /// /// ///public override bool Equals(object obj) { RelProperty other = obj as RelProperty; return (other != null && this.Relationship.EdmEquals(other.Relationship) && this.FromEnd.EdmEquals(other.FromEnd) && this.ToEnd.EdmEquals(other.ToEnd)); } /// /// our hash code /// ///public override int GetHashCode() { return this.ToEnd.Identity.GetHashCode(); } /// /// String form /// ///[DebuggerNonUserCode] public override string ToString() { return m_relationshipType.ToString() + ":" + m_fromEnd.ToString() + ":" + m_toEnd.ToString(); } #endregion } /// /// A helper class for all rel-properties /// internal sealed class RelPropertyHelper { #region private state private Dictionary> _relPropertyMap; private HashSet _interestingRelProperties; #endregion #region private methods /// /// Add the rel property induced by the specified relationship, (if the target /// end has a multiplicity of one) /// We only keep track of rel-properties that are "interesting" /// /// the association relationship /// source end of the relationship traversal /// target end of the traversal private void AddRelProperty(AssociationType associationType, AssociationEndMember fromEnd, AssociationEndMember toEnd) { if (toEnd.RelationshipMultiplicity == RelationshipMultiplicity.Many) { return; } RelProperty prop = new RelProperty(associationType, fromEnd, toEnd); if (_interestingRelProperties == null || !_interestingRelProperties.Contains(prop)) { return; } EntityTypeBase entityType = (EntityTypeBase)((RefType)fromEnd.TypeUsage.EdmType).ElementType; ListpropList; if (!_relPropertyMap.TryGetValue(entityType, out propList)) { propList = new List (); _relPropertyMap[entityType] = propList; } propList.Add(prop); } /// /// Add any rel properties that are induced by the supplied relationship /// /// the relationship private void ProcessRelationship(RelationshipType relationshipType) { AssociationType associationType = relationshipType as AssociationType; if (associationType == null) { return; } // Handle only binary associations if (associationType.AssociationEndMembers.Count != 2) { return; } AssociationEndMember end0 = associationType.AssociationEndMembers[0]; AssociationEndMember end1 = associationType.AssociationEndMembers[1]; AddRelProperty(associationType, end0, end1); AddRelProperty(associationType, end1, end0); } #endregion #region constructors internal RelPropertyHelper(MetadataWorkspace ws, HashSetinterestingRelProperties) { _relPropertyMap = new Dictionary >(); _interestingRelProperties = interestingRelProperties; foreach (RelationshipType relationshipType in ws.GetItems (DataSpace.CSpace)) { ProcessRelationship(relationshipType); } } #endregion #region public APIs /// /// Get the rel properties declared by this type (and *not* by any of its subtypes) /// /// the entity type ///set of rel properties declared for this type internal IEnumerableGetDeclaredOnlyRelProperties(EntityTypeBase entityType) { List relProperties; if (_relPropertyMap.TryGetValue(entityType, out relProperties)) { foreach (RelProperty p in relProperties) { yield return p; } } yield break; } /// /// Get the rel-properties of this entity and its supertypes (starting from the root) /// /// the entity type ///set of rel-properties for this entity type (and its supertypes) internal IEnumerableGetRelProperties(EntityTypeBase entityType) { if (entityType.BaseType != null) { foreach (RelProperty p in GetRelProperties(entityType.BaseType as EntityTypeBase)) { yield return p; } } foreach (RelProperty p in GetDeclaredOnlyRelProperties(entityType)) { yield return p; } } #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
- WebPartTransformerCollection.cs
- DataGridViewAutoSizeModeEventArgs.cs
- AsyncStreamReader.cs
- PropertyMapper.cs
- PolicyReader.cs
- MatrixCamera.cs
- TraceLevelStore.cs
- DataGridItem.cs
- isolationinterop.cs
- StickyNoteHelper.cs
- StructuralObject.cs
- RemoteWebConfigurationHostStream.cs
- ChineseLunisolarCalendar.cs
- Attributes.cs
- Error.cs
- PrinterResolution.cs
- WebPartsSection.cs
- DateTimeFormat.cs
- PieceDirectory.cs
- PresentationAppDomainManager.cs
- HtmlLabelAdapter.cs
- SplitContainer.cs
- MemberDescriptor.cs
- SqlTrackingService.cs
- SystemBrushes.cs
- FixedSOMPage.cs
- SimpleApplicationHost.cs
- ZipFileInfoCollection.cs
- MulticastNotSupportedException.cs
- TypeBuilderInstantiation.cs
- XPathNodeInfoAtom.cs
- QueryExpr.cs
- DataGridRowHeaderAutomationPeer.cs
- Executor.cs
- TrackingQueryElement.cs
- Pkcs9Attribute.cs
- SiblingIterators.cs
- FullTrustAssembly.cs
- DragDeltaEventArgs.cs
- SynchronizationContext.cs
- MarginCollapsingState.cs
- ServiceObjectContainer.cs
- DispatcherEventArgs.cs
- EdmType.cs
- UnauthorizedAccessException.cs
- SmiGettersStream.cs
- RelationshipEndMember.cs
- ControlOperationBehavior.cs
- Stroke2.cs
- HttpCapabilitiesEvaluator.cs
- DefaultHttpHandler.cs
- IndicShape.cs
- ComponentGlyph.cs
- DurableServiceAttribute.cs
- SqlNodeTypeOperators.cs
- ProgressBar.cs
- TransformValueSerializer.cs
- EventArgs.cs
- ScalarType.cs
- AttachedPropertyBrowsableForTypeAttribute.cs
- PasswordDeriveBytes.cs
- SqlOuterApplyReducer.cs
- XmlComment.cs
- Camera.cs
- SectionInformation.cs
- CompilationRelaxations.cs
- ObjectSelectorEditor.cs
- EntityDataSourceDesignerHelper.cs
- CreateUserWizard.cs
- PublisherMembershipCondition.cs
- AppDomainManager.cs
- ContentElement.cs
- PrintController.cs
- BindingContext.cs
- SecurityPermission.cs
- SqlFunctionAttribute.cs
- TableDesigner.cs
- SHA1Cng.cs
- ImpersonateTokenRef.cs
- FixedPosition.cs
- BamlBinaryWriter.cs
- DateTimeConstantAttribute.cs
- TraceContextEventArgs.cs
- EventDescriptor.cs
- DbBuffer.cs
- ListSortDescription.cs
- Aggregates.cs
- MarkupObject.cs
- SimpleRecyclingCache.cs
- ServiceEndpointCollection.cs
- Funcletizer.cs
- AttributeCollection.cs
- SqlException.cs
- ByValueEqualityComparer.cs
- ManagedIStream.cs
- BoundColumn.cs
- DataObject.cs
- XsdBuildProvider.cs
- Window.cs
- GridView.cs