Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Query / InternalTrees / relpropertyhelper.cs / 1 / relpropertyhelper.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //--------------------------------------------------------------------- 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 [....], [....] //--------------------------------------------------------------------- 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
- NativeMethods.cs
- PngBitmapEncoder.cs
- DesignerRegionMouseEventArgs.cs
- GridPatternIdentifiers.cs
- TransactionInformation.cs
- MultidimensionalArrayItemReference.cs
- NativeMethods.cs
- DockPattern.cs
- SizeAnimation.cs
- TemplatedAdorner.cs
- TCEAdapterGenerator.cs
- TypedTableBaseExtensions.cs
- WebPartsPersonalization.cs
- TemplateKeyConverter.cs
- BrowserTree.cs
- AsyncSerializedWorker.cs
- UTF7Encoding.cs
- _UriSyntax.cs
- ColorTransform.cs
- XmlObjectSerializerWriteContext.cs
- CookielessHelper.cs
- PolyQuadraticBezierSegment.cs
- HttpResponse.cs
- BitConverter.cs
- HwndAppCommandInputProvider.cs
- UIServiceHelper.cs
- EarlyBoundInfo.cs
- InvariantComparer.cs
- TypeDescriptionProviderAttribute.cs
- SecurityUtils.cs
- StatusBar.cs
- TypeLoadException.cs
- EntityModelBuildProvider.cs
- DictionaryManager.cs
- DefaultProxySection.cs
- ListViewInsertEventArgs.cs
- CodeObject.cs
- ByteStack.cs
- ListViewItem.cs
- Hyperlink.cs
- Stack.cs
- SineEase.cs
- StaticSiteMapProvider.cs
- _UriSyntax.cs
- RichTextBoxConstants.cs
- HttpPostedFile.cs
- ConstructorNeedsTagAttribute.cs
- SafeSecurityHandles.cs
- InvalidPrinterException.cs
- OdbcDataAdapter.cs
- VoiceObjectToken.cs
- EnglishPluralizationService.cs
- TypeToStringValueConverter.cs
- HMACRIPEMD160.cs
- util.cs
- PinProtectionHelper.cs
- PropertyPath.cs
- GeometryModel3D.cs
- metadatamappinghashervisitor.cs
- IProvider.cs
- SingleAnimation.cs
- WebPartCollection.cs
- ImageFormat.cs
- HtmlInputText.cs
- TypeContext.cs
- ControlIdConverter.cs
- XmlSchemaComplexContentExtension.cs
- RedistVersionInfo.cs
- TextEncodedRawTextWriter.cs
- PackagingUtilities.cs
- safemediahandle.cs
- XmlCharType.cs
- ValidationSummary.cs
- VariableQuery.cs
- TranslateTransform.cs
- StaticFileHandler.cs
- CFStream.cs
- XmlUtf8RawTextWriter.cs
- PrintingPermissionAttribute.cs
- Rethrow.cs
- ContentControl.cs
- TreeNodeEventArgs.cs
- FillBehavior.cs
- StylusPointProperty.cs
- SqlConnectionString.cs
- TraceInternal.cs
- PictureBox.cs
- TypePresenter.xaml.cs
- ModifierKeysConverter.cs
- DesignTimeSiteMapProvider.cs
- FileAuthorizationModule.cs
- ByeMessage11.cs
- HwndKeyboardInputProvider.cs
- ConstructorBuilder.cs
- ResXDataNode.cs
- SHA384.cs
- Interfaces.cs
- FunctionCommandText.cs
- FormViewCommandEventArgs.cs
- CapabilitiesPattern.cs