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 / UpdateCommand.cs / 2 / UpdateCommand.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Data.Metadata.Edm; using System.Data.Common; using System.Collections.Generic; using System.Text; using System.Diagnostics; using System.Globalization; using System.Data.Common.Utils; using System.Data.Common.CommandTrees; using System.Data.Objects; using System.Linq; using System.Data.EntityClient; namespace System.Data.Mapping.Update.Internal { internal enum UpdateCommandKind { Dynamic, Function, } ////// Class storing the result of compiling an instance DML command. /// internal abstract class UpdateCommand : IComparable, IEquatable { /// /// Gets all identifiers (key values basically) generated by this command. For instance, /// @@IDENTITY values. /// internal abstract IEnumerableOutputIdentifiers { get; } /// /// Gets all identifiers required by this command. /// internal abstract IEnumerableInputIdentifiers { get; } /// /// Gets table (if any) associated with the current command. FunctionUpdateCommand has no table. /// internal virtual EntitySet Table { get { return null; } } ////// Gets type of command. /// internal abstract UpdateCommandKind Kind { get; } ////// Yields all state entries contributing to this command. Used for error reporting. /// /// Translator context. ///Related state entries. internal abstract ListGetStateEntries(UpdateTranslator translator); /// /// Determines model level dependencies for the current command. A command 'requires' an entity /// (in other words, it must follow commands 'producing' that entity) if it deletes the entity /// or inserts a relationship to that entity. A command 'produces' an entity (in other words, /// it must precede commands 'requiring' that entity) if it inserts the entity or deletes a relationship /// to that entity. /// internal void GetRequiredAndProducedEntities(UpdateTranslator translator, out Listrequired, out List produced) { List stateEntries = GetStateEntries(translator); required = new List (); produced = new List (); // determine parent entity (a command must handle at most one entity) EntityKey parent = null; foreach (IEntityStateEntry stateEntry in stateEntries) { if (!stateEntry.IsRelationship) { parent = stateEntry.EntityKey; Debug.Assert(stateEntries.Where(e => !e.IsRelationship).Select(e => e.EntityKey).Distinct().Count() <= 1, "more than one IEntityStateEntry is an Entity!"); if (stateEntry.State == EntityState.Added) { produced.Add(parent); } else if (stateEntry.State == EntityState.Deleted) { required.Add(parent); } break; } } // process relationships foreach (IEntityStateEntry stateEntry in stateEntries) { if (stateEntry.IsRelationship) { // only worry about the relationship if it is being added or deleted bool isAdded = stateEntry.State == EntityState.Added; if (isAdded || stateEntry.State == EntityState.Deleted) { DbDataRecord record = isAdded ? (DbDataRecord)stateEntry.CurrentValues : stateEntry.OriginalValues; Debug.Assert(2 == record.FieldCount, "non-binary relationship?"); EntityKey end1 = (EntityKey)record[0]; EntityKey end2 = (EntityKey)record[1]; // relationships require the entity when they're added and free the entity when they're deleted... List affected = isAdded ? required : produced; if (parent == null) { // both ends are being modified by the relationship affected.Add(end1); affected.Add(end2); } else { // only the end opposite the parent is being modified by the relationship... if (parent.Equals(end1)) { affected.Add(end2); } else { affected.Add(end1); } } } } } } /// /// Executes the current update command. /// /// Translator context. /// EntityConnection to use (and implicitly, the EntityTransaction to use). /// Aggregator for identifier values (read for InputIdentifiers; write for /// OutputIdentifiers /// Aggregator for server generated values. ///Number of rows affected by the command. internal abstract int Execute(UpdateTranslator translator, EntityConnection connection, DictionaryidentifierValues, List > generatedValues); internal abstract int CompareToType(UpdateCommand other); public int CompareTo(UpdateCommand other) { if (this.Equals(other)) { return 0; } Debug.Assert(null != other, "comparing to null UpdateCommand"); int result = (int)this.Kind - (int)other.Kind; if (0 != result) { return result; } // defer to specific type for other comparisons... result = CompareToType(other); return result; } #region IEquatable: note that we use reference equality public bool Equals(UpdateCommand other) { return base.Equals(other); } public override bool Equals(object obj) { return base.Equals(obj); } public override int GetHashCode() { return base.GetHashCode(); } #endregion } } // 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; using System.Collections.Generic; using System.Text; using System.Diagnostics; using System.Globalization; using System.Data.Common.Utils; using System.Data.Common.CommandTrees; using System.Data.Objects; using System.Linq; using System.Data.EntityClient; namespace System.Data.Mapping.Update.Internal { internal enum UpdateCommandKind { Dynamic, Function, } ////// Class storing the result of compiling an instance DML command. /// internal abstract class UpdateCommand : IComparable, IEquatable { /// /// Gets all identifiers (key values basically) generated by this command. For instance, /// @@IDENTITY values. /// internal abstract IEnumerableOutputIdentifiers { get; } /// /// Gets all identifiers required by this command. /// internal abstract IEnumerableInputIdentifiers { get; } /// /// Gets table (if any) associated with the current command. FunctionUpdateCommand has no table. /// internal virtual EntitySet Table { get { return null; } } ////// Gets type of command. /// internal abstract UpdateCommandKind Kind { get; } ////// Yields all state entries contributing to this command. Used for error reporting. /// /// Translator context. ///Related state entries. internal abstract ListGetStateEntries(UpdateTranslator translator); /// /// Determines model level dependencies for the current command. A command 'requires' an entity /// (in other words, it must follow commands 'producing' that entity) if it deletes the entity /// or inserts a relationship to that entity. A command 'produces' an entity (in other words, /// it must precede commands 'requiring' that entity) if it inserts the entity or deletes a relationship /// to that entity. /// internal void GetRequiredAndProducedEntities(UpdateTranslator translator, out Listrequired, out List produced) { List stateEntries = GetStateEntries(translator); required = new List (); produced = new List (); // determine parent entity (a command must handle at most one entity) EntityKey parent = null; foreach (IEntityStateEntry stateEntry in stateEntries) { if (!stateEntry.IsRelationship) { parent = stateEntry.EntityKey; Debug.Assert(stateEntries.Where(e => !e.IsRelationship).Select(e => e.EntityKey).Distinct().Count() <= 1, "more than one IEntityStateEntry is an Entity!"); if (stateEntry.State == EntityState.Added) { produced.Add(parent); } else if (stateEntry.State == EntityState.Deleted) { required.Add(parent); } break; } } // process relationships foreach (IEntityStateEntry stateEntry in stateEntries) { if (stateEntry.IsRelationship) { // only worry about the relationship if it is being added or deleted bool isAdded = stateEntry.State == EntityState.Added; if (isAdded || stateEntry.State == EntityState.Deleted) { DbDataRecord record = isAdded ? (DbDataRecord)stateEntry.CurrentValues : stateEntry.OriginalValues; Debug.Assert(2 == record.FieldCount, "non-binary relationship?"); EntityKey end1 = (EntityKey)record[0]; EntityKey end2 = (EntityKey)record[1]; // relationships require the entity when they're added and free the entity when they're deleted... List affected = isAdded ? required : produced; if (parent == null) { // both ends are being modified by the relationship affected.Add(end1); affected.Add(end2); } else { // only the end opposite the parent is being modified by the relationship... if (parent.Equals(end1)) { affected.Add(end2); } else { affected.Add(end1); } } } } } } /// /// Executes the current update command. /// /// Translator context. /// EntityConnection to use (and implicitly, the EntityTransaction to use). /// Aggregator for identifier values (read for InputIdentifiers; write for /// OutputIdentifiers /// Aggregator for server generated values. ///Number of rows affected by the command. internal abstract int Execute(UpdateTranslator translator, EntityConnection connection, DictionaryidentifierValues, List > generatedValues); internal abstract int CompareToType(UpdateCommand other); public int CompareTo(UpdateCommand other) { if (this.Equals(other)) { return 0; } Debug.Assert(null != other, "comparing to null UpdateCommand"); int result = (int)this.Kind - (int)other.Kind; if (0 != result) { return result; } // defer to specific type for other comparisons... result = CompareToType(other); return result; } #region IEquatable: note that we use reference equality public bool Equals(UpdateCommand other) { return base.Equals(other); } public override bool Equals(object obj) { return base.Equals(obj); } public override int GetHashCode() { return base.GetHashCode(); } #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
- CatalogZone.cs
- PagedDataSource.cs
- MessageAction.cs
- CacheOutputQuery.cs
- PatternMatcher.cs
- EmbeddedMailObject.cs
- XNodeValidator.cs
- Mapping.cs
- EntityDataSourceChangingEventArgs.cs
- DataSourceExpressionCollection.cs
- WebPartConnectionsDisconnectVerb.cs
- ObjectFullSpanRewriter.cs
- JsonDeserializer.cs
- DockAndAnchorLayout.cs
- XmlSchemaAll.cs
- ProcessProtocolHandler.cs
- TextElementCollection.cs
- RealizedColumnsBlock.cs
- GridViewPageEventArgs.cs
- EntityDataSource.cs
- PropertyInformation.cs
- XmlQualifiedName.cs
- SQLGuidStorage.cs
- HtmlLink.cs
- DataMember.cs
- PerformanceCounterPermissionEntryCollection.cs
- ADMembershipUser.cs
- CodeCompileUnit.cs
- TypeCodeDomSerializer.cs
- StreamReader.cs
- ProcessManager.cs
- columnmapfactory.cs
- DocumentSchemaValidator.cs
- SafeLibraryHandle.cs
- HtmlFormWrapper.cs
- DecoderBestFitFallback.cs
- WorkingDirectoryEditor.cs
- SqlCommandBuilder.cs
- StructuralObject.cs
- DispatcherProcessingDisabled.cs
- DeferredSelectedIndexReference.cs
- GrammarBuilderBase.cs
- MetadataCache.cs
- ScriptControlManager.cs
- ClientSettingsSection.cs
- SourceExpressionException.cs
- WpfXamlLoader.cs
- ContractListAdapter.cs
- SingleAnimationBase.cs
- TypeConverter.cs
- AssemblyBuilder.cs
- FixedSOMContainer.cs
- StringPropertyBuilder.cs
- SqlParameterizer.cs
- CacheAxisQuery.cs
- BulletChrome.cs
- BaseHashHelper.cs
- DBBindings.cs
- TypeUsage.cs
- BamlResourceSerializer.cs
- AccessibilityApplicationManager.cs
- SafeSerializationManager.cs
- NavigationPropertyEmitter.cs
- CounterNameConverter.cs
- XslTransform.cs
- OperationPickerDialog.cs
- RelOps.cs
- FormsAuthenticationUser.cs
- OracleConnectionString.cs
- ReverseInheritProperty.cs
- LogEntrySerialization.cs
- RegexTree.cs
- SelectedGridItemChangedEvent.cs
- MultiPropertyDescriptorGridEntry.cs
- CheckBoxBaseAdapter.cs
- AssemblyNameProxy.cs
- BitArray.cs
- SqlRecordBuffer.cs
- XamlTypeWithExplicitNamespace.cs
- ComMethodElement.cs
- DataServiceProcessingPipelineEventArgs.cs
- DecoderFallbackWithFailureFlag.cs
- EditCommandColumn.cs
- ConfigurationManagerInternal.cs
- DataServiceKeyAttribute.cs
- DoubleLink.cs
- CodeLinePragma.cs
- ResetableIterator.cs
- SemanticResultKey.cs
- IdentitySection.cs
- DataGridViewColumn.cs
- ConstraintManager.cs
- ListSourceHelper.cs
- DiscoveryService.cs
- DataPagerFieldItem.cs
- DataGridState.cs
- CodeConstructor.cs
- OdbcException.cs
- WebPartEditorOkVerb.cs
- URI.cs