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
- DaylightTime.cs
- Parser.cs
- SiteIdentityPermission.cs
- HttpModuleActionCollection.cs
- ObjectListItemCollection.cs
- TimeEnumHelper.cs
- BufferModesCollection.cs
- TraceSection.cs
- TextTreeDeleteContentUndoUnit.cs
- OdbcReferenceCollection.cs
- StyleSelector.cs
- Label.cs
- Workspace.cs
- TreeNodeClickEventArgs.cs
- PerspectiveCamera.cs
- QuaternionAnimation.cs
- TableStyle.cs
- CallSite.cs
- XmlAttributeCollection.cs
- PageAsyncTaskManager.cs
- SubtreeProcessor.cs
- ConfigPathUtility.cs
- CoTaskMemHandle.cs
- IdnElement.cs
- SchemaContext.cs
- Positioning.cs
- Constraint.cs
- Connector.xaml.cs
- AuthenticationConfig.cs
- XamlTemplateSerializer.cs
- LazyTextWriterCreator.cs
- EntityStoreSchemaFilterEntry.cs
- DataControlLinkButton.cs
- QueryCursorEventArgs.cs
- ConfigurationFileMap.cs
- SymmetricKeyWrap.cs
- OracleParameter.cs
- NonVisualControlAttribute.cs
- MobileControl.cs
- EventEntry.cs
- CompoundFileReference.cs
- DispatcherHooks.cs
- TableItemPatternIdentifiers.cs
- InvokeMethod.cs
- ValuePatternIdentifiers.cs
- StorageTypeMapping.cs
- ToolStripActionList.cs
- Constants.cs
- Stack.cs
- MultiAsyncResult.cs
- _NtlmClient.cs
- WindowsScroll.cs
- Label.cs
- InvariantComparer.cs
- XmlSchemaGroupRef.cs
- ToolStripPanelRenderEventArgs.cs
- FocusWithinProperty.cs
- MenuItem.cs
- XslException.cs
- ErrorWrapper.cs
- CompareInfo.cs
- DateTimeConverter2.cs
- DetailsViewPageEventArgs.cs
- ManualResetEvent.cs
- CustomAttributeSerializer.cs
- HandleScope.cs
- DataMisalignedException.cs
- Bezier.cs
- UncommonField.cs
- RoutingService.cs
- DataTemplateKey.cs
- AccessibilityHelperForXpWin2k3.cs
- LiteralSubsegment.cs
- x509utils.cs
- HtmlInputCheckBox.cs
- EmitterCache.cs
- DesignerTransactionCloseEvent.cs
- WebControlAdapter.cs
- BackStopAuthenticationModule.cs
- WindowsImpersonationContext.cs
- PhoneCall.cs
- BaseProcessor.cs
- InputProcessorProfilesLoader.cs
- ScriptRegistrationManager.cs
- ChannelSinkStacks.cs
- RegexParser.cs
- PropertyGrid.cs
- SqlDataSourceTableQuery.cs
- path.cs
- ProcessInputEventArgs.cs
- ProcessInputEventArgs.cs
- TryExpression.cs
- ClientApiGenerator.cs
- _FtpControlStream.cs
- VectorCollectionValueSerializer.cs
- TypeSystem.cs
- SchemaAttDef.cs
- SqlCacheDependencySection.cs
- AsymmetricCryptoHandle.cs
- InvalidPrinterException.cs