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 / Map / ViewGeneration / Validation / BasicCellRelation.cs / 1 / BasicCellRelation.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved.Bharani1729 // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Collections.Generic; using System.Data.Mapping.ViewGeneration.Structures; using System.Text; using System.Diagnostics; using System.Data.Common.Utils; using System.Data.Metadata.Edm; namespace System.Data.Mapping.ViewGeneration.Validation { using BasicSchemaConstraints = SchemaConstraints; // This class represents a relation signature that lists all scalar // slots for the join tree in cell query (before projection) internal class BasicCellRelation : CellRelation { #region Constructor // effects: Creates a basic cell relation for query internal BasicCellRelation(CellQuery cellQuery, ViewCellRelation viewCellRelation, IEnumerable slots) : base(viewCellRelation.CellNumber) { m_cellQuery = cellQuery; m_slots = new List (slots); Debug.Assert(m_slots.Count > 0, "Cell relation with not even an exent?"); m_viewCellRelation = viewCellRelation; } #endregion #region Fields private CellQuery m_cellQuery; private List m_slots; private ViewCellRelation m_viewCellRelation; // The viewcellrelation // corresponding to this basiccellrelation #endregion #region Properties internal ViewCellRelation ViewCellRelation { get { return m_viewCellRelation;} } #endregion #region Key Constraints Methods // effects: Modifies constraints to contain the key constraints that // are present in this relation internal void PopulateKeyConstraints(BasicSchemaConstraints constraints, MetadataWorkspace workspace) { Debug.Assert(this == m_cellQuery.BasicCellRelation, "Cellquery does not point to the correct BasicCellRelation?"); Debug.Assert(m_cellQuery.Extent is EntitySet || m_cellQuery.Extent is AssociationSet, "Top level extents handled is currently entityset or association set"); if (m_cellQuery.Extent is EntitySet) { PopulateKeyConstraintsForEntitySet(constraints, workspace); } else { PopulateKeyConstraintsForRelationshipSet(constraints, workspace); } } // requires: this to correspond to a cell relation for an entityset (m_cellQuery.Extent) // effects: Adds any key constraints present in this to constraints private void PopulateKeyConstraintsForEntitySet(BasicSchemaConstraints constraints, MetadataWorkspace workspace) { MemberPath prefix = new MemberPath(m_cellQuery.Extent, workspace); EntityType entityType = (EntityType) m_cellQuery.Extent.ElementType; // Get all the keys for the entity type and create the key constraints List keys = ExtentKey.GetKeysForEntityType(prefix, entityType); AddKeyConstraints(keys, constraints); } // requires: this to correspond to a cell relation for an association set (m_cellQuery.Extent) // effects: Adds any key constraints present in this relation in // constraints private void PopulateKeyConstraintsForRelationshipSet(BasicSchemaConstraints constraints, MetadataWorkspace workspace) { AssociationSet relationshipSet = m_cellQuery.Extent as AssociationSet; // Gather all members of all keys // CHANGE_[....]_FEATURE_KEYS: assume that an Entity has exactly one key. Otherwise we // have to take a cross-product of all keys // Keep track of all the key members for the association in a set // so that if no end corresponds to a key, we use all the members // to form the key Set associationKeyMembers = new Set (MemberPath.EqualityComparer); bool hasAnEndThatFormsKey = false; // Determine the keys of each end. If the end forms a key, add it // as a key to the set foreach (AssociationSetEnd end in relationshipSet.AssociationSetEnds) { AssociationEndMember endMember = end.CorrespondingAssociationEndMember; MemberPath prefix = new MemberPath(relationshipSet, endMember, workspace); List keys = ExtentKey.GetKeysForEntityType(prefix, end.EntitySet.ElementType); Debug.Assert(keys.Count > 0, "No keys for entity?"); Debug.Assert(keys.Count == 1, "Currently, we only support primary keys"); if (MetadataHelper.DoesEndFormKey(relationshipSet, endMember)) { // This end has is a key end AddKeyConstraints(keys, constraints); hasAnEndThatFormsKey = true; } // Add the members of the (only) key to associationKey associationKeyMembers.AddRange(keys[0].KeyFields); } // If an end forms a key then that key implies the full key if (false == hasAnEndThatFormsKey) { // No end is a key -- take all the end members and make a key // based on that ExtentKey key = new ExtentKey(associationKeyMembers); ExtentKey[] keys = new ExtentKey[] { key }; AddKeyConstraints(keys, constraints); } } // effects: Given keys for this relation, adds one key constraint for // each key present in keys private void AddKeyConstraints(IEnumerable keys, BasicSchemaConstraints constraints) { foreach (ExtentKey key in keys) { // If the key is being projected, only then do we add the key constraint List keySlots = JoinTreeSlot.GetSlots(m_slots, key.KeyFields); if (keySlots != null) { BasicKeyConstraint keyConstraint = new BasicKeyConstraint(this, keySlots); constraints.Add(keyConstraint); } } } #endregion #region Comparer/String Methods protected override int GetHash() { // Note: Using CLR-Hashcode return m_cellQuery.GetHashCode(); // We need not hash the slots, etc - cellQuery should give us enough // differentiation and land the relation into the same bucket } internal override void ToCompactString(StringBuilder builder) { builder.Append("BasicRel: "); // Just print the extent name from slot 0 StringUtil.FormatStringBuilder(builder, "{0}", m_slots[0]); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved.Bharani1729 // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Collections.Generic; using System.Data.Mapping.ViewGeneration.Structures; using System.Text; using System.Diagnostics; using System.Data.Common.Utils; using System.Data.Metadata.Edm; namespace System.Data.Mapping.ViewGeneration.Validation { using BasicSchemaConstraints = SchemaConstraints; // This class represents a relation signature that lists all scalar // slots for the join tree in cell query (before projection) internal class BasicCellRelation : CellRelation { #region Constructor // effects: Creates a basic cell relation for query internal BasicCellRelation(CellQuery cellQuery, ViewCellRelation viewCellRelation, IEnumerable slots) : base(viewCellRelation.CellNumber) { m_cellQuery = cellQuery; m_slots = new List (slots); Debug.Assert(m_slots.Count > 0, "Cell relation with not even an exent?"); m_viewCellRelation = viewCellRelation; } #endregion #region Fields private CellQuery m_cellQuery; private List m_slots; private ViewCellRelation m_viewCellRelation; // The viewcellrelation // corresponding to this basiccellrelation #endregion #region Properties internal ViewCellRelation ViewCellRelation { get { return m_viewCellRelation;} } #endregion #region Key Constraints Methods // effects: Modifies constraints to contain the key constraints that // are present in this relation internal void PopulateKeyConstraints(BasicSchemaConstraints constraints, MetadataWorkspace workspace) { Debug.Assert(this == m_cellQuery.BasicCellRelation, "Cellquery does not point to the correct BasicCellRelation?"); Debug.Assert(m_cellQuery.Extent is EntitySet || m_cellQuery.Extent is AssociationSet, "Top level extents handled is currently entityset or association set"); if (m_cellQuery.Extent is EntitySet) { PopulateKeyConstraintsForEntitySet(constraints, workspace); } else { PopulateKeyConstraintsForRelationshipSet(constraints, workspace); } } // requires: this to correspond to a cell relation for an entityset (m_cellQuery.Extent) // effects: Adds any key constraints present in this to constraints private void PopulateKeyConstraintsForEntitySet(BasicSchemaConstraints constraints, MetadataWorkspace workspace) { MemberPath prefix = new MemberPath(m_cellQuery.Extent, workspace); EntityType entityType = (EntityType) m_cellQuery.Extent.ElementType; // Get all the keys for the entity type and create the key constraints List keys = ExtentKey.GetKeysForEntityType(prefix, entityType); AddKeyConstraints(keys, constraints); } // requires: this to correspond to a cell relation for an association set (m_cellQuery.Extent) // effects: Adds any key constraints present in this relation in // constraints private void PopulateKeyConstraintsForRelationshipSet(BasicSchemaConstraints constraints, MetadataWorkspace workspace) { AssociationSet relationshipSet = m_cellQuery.Extent as AssociationSet; // Gather all members of all keys // CHANGE_[....]_FEATURE_KEYS: assume that an Entity has exactly one key. Otherwise we // have to take a cross-product of all keys // Keep track of all the key members for the association in a set // so that if no end corresponds to a key, we use all the members // to form the key Set associationKeyMembers = new Set (MemberPath.EqualityComparer); bool hasAnEndThatFormsKey = false; // Determine the keys of each end. If the end forms a key, add it // as a key to the set foreach (AssociationSetEnd end in relationshipSet.AssociationSetEnds) { AssociationEndMember endMember = end.CorrespondingAssociationEndMember; MemberPath prefix = new MemberPath(relationshipSet, endMember, workspace); List keys = ExtentKey.GetKeysForEntityType(prefix, end.EntitySet.ElementType); Debug.Assert(keys.Count > 0, "No keys for entity?"); Debug.Assert(keys.Count == 1, "Currently, we only support primary keys"); if (MetadataHelper.DoesEndFormKey(relationshipSet, endMember)) { // This end has is a key end AddKeyConstraints(keys, constraints); hasAnEndThatFormsKey = true; } // Add the members of the (only) key to associationKey associationKeyMembers.AddRange(keys[0].KeyFields); } // If an end forms a key then that key implies the full key if (false == hasAnEndThatFormsKey) { // No end is a key -- take all the end members and make a key // based on that ExtentKey key = new ExtentKey(associationKeyMembers); ExtentKey[] keys = new ExtentKey[] { key }; AddKeyConstraints(keys, constraints); } } // effects: Given keys for this relation, adds one key constraint for // each key present in keys private void AddKeyConstraints(IEnumerable keys, BasicSchemaConstraints constraints) { foreach (ExtentKey key in keys) { // If the key is being projected, only then do we add the key constraint List keySlots = JoinTreeSlot.GetSlots(m_slots, key.KeyFields); if (keySlots != null) { BasicKeyConstraint keyConstraint = new BasicKeyConstraint(this, keySlots); constraints.Add(keyConstraint); } } } #endregion #region Comparer/String Methods protected override int GetHash() { // Note: Using CLR-Hashcode return m_cellQuery.GetHashCode(); // We need not hash the slots, etc - cellQuery should give us enough // differentiation and land the relation into the same bucket } internal override void ToCompactString(StringBuilder builder) { builder.Append("BasicRel: "); // Just print the extent name from slot 0 StringUtil.FormatStringBuilder(builder, "{0}", m_slots[0]); } #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
- PrimarySelectionAdorner.cs
- ImageInfo.cs
- CompModSwitches.cs
- ManagedCodeMarkers.cs
- CodeSnippetTypeMember.cs
- SkipStoryboardToFill.cs
- TraceRecord.cs
- XmlConvert.cs
- Comparer.cs
- UriSchemeKeyedCollection.cs
- FamilyTypeface.cs
- EventDrivenDesigner.cs
- ModulesEntry.cs
- PerformanceCounterCategory.cs
- URLString.cs
- ToolStripSystemRenderer.cs
- WebPartsPersonalization.cs
- XmlWriterSettings.cs
- Random.cs
- BufferedWebEventProvider.cs
- NeedSkipTokenVisitor.cs
- XmlSchemaValidator.cs
- CharacterString.cs
- XmlSchemaObject.cs
- DesignerCatalogPartChrome.cs
- Oci.cs
- DesignTimeTemplateParser.cs
- HScrollBar.cs
- FramingDecoders.cs
- SuppressMessageAttribute.cs
- WebPartPersonalization.cs
- WinEventHandler.cs
- sapiproxy.cs
- EventEntry.cs
- CheckBoxField.cs
- StylusCaptureWithinProperty.cs
- StaticExtensionConverter.cs
- MediaContext.cs
- SspiSafeHandles.cs
- GlyphElement.cs
- XmlSiteMapProvider.cs
- CodeObjectCreateExpression.cs
- SchemaImporterExtension.cs
- SHA512Managed.cs
- WebPartConnectionsConnectVerb.cs
- GenericsNotImplementedException.cs
- VoiceChangeEventArgs.cs
- QilVisitor.cs
- EventLog.cs
- TextFormatterHost.cs
- DBPropSet.cs
- DeferredSelectedIndexReference.cs
- ExpressionNode.cs
- RIPEMD160Managed.cs
- SiteIdentityPermission.cs
- Missing.cs
- SRDisplayNameAttribute.cs
- StrokeDescriptor.cs
- SamlAttributeStatement.cs
- CacheAxisQuery.cs
- FlowDocumentPaginator.cs
- SystemThemeKey.cs
- Clipboard.cs
- EntitySetRetriever.cs
- TableItemStyle.cs
- Crc32.cs
- TreeNodeMouseHoverEvent.cs
- Solver.cs
- NameValueConfigurationElement.cs
- SpnEndpointIdentity.cs
- TrackingDataItem.cs
- XmlAggregates.cs
- Resources.Designer.cs
- MimeBasePart.cs
- SimpleMailWebEventProvider.cs
- UdpChannelFactory.cs
- OutOfMemoryException.cs
- OutputCacheProfile.cs
- TrustLevel.cs
- MouseActionConverter.cs
- ProxyManager.cs
- XPathAncestorIterator.cs
- XmlWriter.cs
- FreezableCollection.cs
- RelationshipEntry.cs
- WindowsNonControl.cs
- ContextMenuStripGroupCollection.cs
- WindowsFont.cs
- DataGridViewButtonColumn.cs
- ImmutableAssemblyCacheEntry.cs
- DataGridViewComboBoxCell.cs
- ImpersonateTokenRef.cs
- XmlBinaryReader.cs
- EventBindingService.cs
- MetadataItemEmitter.cs
- Solver.cs
- RectangleConverter.cs
- srgsitem.cs
- XmlQualifiedName.cs
- CatalogPartCollection.cs