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 / PlanCompiler / ProviderCommandInfoUtils.cs / 1 / ProviderCommandInfoUtils.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; //using System.Diagnostics; // Please use PlanCompiler.Assert instead of Debug.Assert in this class... using System.Data.Common.CommandTrees; using System.Data.Common; using md = System.Data.Metadata.Edm; using System.Data.Query.InternalTrees; using System.Data.Query.PlanCompiler; namespace System.Data.Query.PlanCompiler { ////// Helper class for creating a ProviderCommandInfo given an Iqt Node. /// internal static class ProviderCommandInfoUtils { #region Public Methods ////// Creates a ProviderCommandInfo for the given node. /// This method should be called when the keys, foreign keys and sort keys are known ahead of time. /// Typically it is used when the original command is factored into multiple commands. /// /// The owning command, used for creating VarVecs, etc /// The root of the sub-command for which a ProviderCommandInfo should be generated /// A list of ProviderCommandInfos that were created for the child sub-commands. ///The resulting ProviderCommandInfo internal static ProviderCommandInfo Create( Command command, Node node, Listchildren) { PhysicalProjectOp projectOp = node.Op as PhysicalProjectOp; PlanCompiler.Assert(projectOp != null, "Expected root Op to be a physical Project"); // build up the CQT DbCommandTree ctree = CTreeGenerator.Generate(command, node); DbQueryCommandTree cqtree = ctree as DbQueryCommandTree; PlanCompiler.Assert(cqtree != null, "null query command tree"); // Get the rowtype for the result cqt md.CollectionType collType = TypeHelpers.GetEdmType (cqtree.Query.ResultType); PlanCompiler.Assert(md.TypeSemantics.IsRowType(collType.TypeUsage), "command rowtype is not a record"); // Build up a mapping from Vars to the corresponding output property/column Dictionary outputVarMap = BuildOutputVarMap(projectOp, collType.TypeUsage); return new ProviderCommandInfo(ctree, children); } /// /// Creates a ProviderCommandInfo for the given node. /// This method should be called when the keys and the sort keys are not known ahead of time. /// Typically it is used when there is only one command, that is no query factoring is done. /// This method also has the option of pulling up keys and sort information. /// /// The owning command, used for creating VarVecs, etc /// The root of the sub-command for which a ProviderCommandInfo should be generated ///The resulting ProviderCommandInfo internal static ProviderCommandInfo Create( Command command, Node node) { return Create( command, node, new List() //children ); } #endregion #region Private Methods /// /// Build up a mapping from Vars to the corresponding property of the output row type /// /// the physical projectOp /// output type ///a map from Vars to the output type member private static Dictionary BuildOutputVarMap(PhysicalProjectOp projectOp, md.TypeUsage outputType) { Dictionary outputVarMap = new Dictionary(); PlanCompiler.Assert(md.TypeSemantics.IsRowType(outputType), "PhysicalProjectOp result type is not a RowType?"); IEnumeratorpropertyEnumerator = TypeHelpers.GetEdmType (outputType).Properties.GetEnumerator(); IEnumerator varEnumerator = projectOp.Outputs.GetEnumerator(); while (true) { bool foundProp = propertyEnumerator.MoveNext(); bool foundVar = varEnumerator.MoveNext(); if (foundProp != foundVar) { throw EntityUtil.InternalError(EntityUtil.InternalErrorCode.ColumnCountMismatch, 1); } if (!foundProp) { break; } outputVarMap[varEnumerator.Current] = propertyEnumerator.Current; } return outputVarMap; } #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.Diagnostics; // Please use PlanCompiler.Assert instead of Debug.Assert in this class... using System.Data.Common.CommandTrees; using System.Data.Common; using md = System.Data.Metadata.Edm; using System.Data.Query.InternalTrees; using System.Data.Query.PlanCompiler; namespace System.Data.Query.PlanCompiler { ////// Helper class for creating a ProviderCommandInfo given an Iqt Node. /// internal static class ProviderCommandInfoUtils { #region Public Methods ////// Creates a ProviderCommandInfo for the given node. /// This method should be called when the keys, foreign keys and sort keys are known ahead of time. /// Typically it is used when the original command is factored into multiple commands. /// /// The owning command, used for creating VarVecs, etc /// The root of the sub-command for which a ProviderCommandInfo should be generated /// A list of ProviderCommandInfos that were created for the child sub-commands. ///The resulting ProviderCommandInfo internal static ProviderCommandInfo Create( Command command, Node node, Listchildren) { PhysicalProjectOp projectOp = node.Op as PhysicalProjectOp; PlanCompiler.Assert(projectOp != null, "Expected root Op to be a physical Project"); // build up the CQT DbCommandTree ctree = CTreeGenerator.Generate(command, node); DbQueryCommandTree cqtree = ctree as DbQueryCommandTree; PlanCompiler.Assert(cqtree != null, "null query command tree"); // Get the rowtype for the result cqt md.CollectionType collType = TypeHelpers.GetEdmType (cqtree.Query.ResultType); PlanCompiler.Assert(md.TypeSemantics.IsRowType(collType.TypeUsage), "command rowtype is not a record"); // Build up a mapping from Vars to the corresponding output property/column Dictionary outputVarMap = BuildOutputVarMap(projectOp, collType.TypeUsage); return new ProviderCommandInfo(ctree, children); } /// /// Creates a ProviderCommandInfo for the given node. /// This method should be called when the keys and the sort keys are not known ahead of time. /// Typically it is used when there is only one command, that is no query factoring is done. /// This method also has the option of pulling up keys and sort information. /// /// The owning command, used for creating VarVecs, etc /// The root of the sub-command for which a ProviderCommandInfo should be generated ///The resulting ProviderCommandInfo internal static ProviderCommandInfo Create( Command command, Node node) { return Create( command, node, new List() //children ); } #endregion #region Private Methods /// /// Build up a mapping from Vars to the corresponding property of the output row type /// /// the physical projectOp /// output type ///a map from Vars to the output type member private static Dictionary BuildOutputVarMap(PhysicalProjectOp projectOp, md.TypeUsage outputType) { Dictionary outputVarMap = new Dictionary(); PlanCompiler.Assert(md.TypeSemantics.IsRowType(outputType), "PhysicalProjectOp result type is not a RowType?"); IEnumeratorpropertyEnumerator = TypeHelpers.GetEdmType (outputType).Properties.GetEnumerator(); IEnumerator varEnumerator = projectOp.Outputs.GetEnumerator(); while (true) { bool foundProp = propertyEnumerator.MoveNext(); bool foundVar = varEnumerator.MoveNext(); if (foundProp != foundVar) { throw EntityUtil.InternalError(EntityUtil.InternalErrorCode.ColumnCountMismatch, 1); } if (!foundProp) { break; } outputVarMap[varEnumerator.Current] = propertyEnumerator.Current; } return outputVarMap; } #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
- XmlSchemaException.cs
- WindowsGraphics.cs
- XsltSettings.cs
- RecommendedAsConfigurableAttribute.cs
- HttpResponseBase.cs
- DataControlCommands.cs
- XmlAttributeCollection.cs
- AuthorizationRuleCollection.cs
- HtmlTernaryTree.cs
- Tag.cs
- BuildProviderCollection.cs
- XmlUtil.cs
- DetailsViewPageEventArgs.cs
- SerialReceived.cs
- FutureFactory.cs
- DataServiceQuery.cs
- CallbackHandler.cs
- Inline.cs
- XmlValidatingReader.cs
- CommandValueSerializer.cs
- CodeBlockBuilder.cs
- DependencyProperty.cs
- _Semaphore.cs
- DataDocumentXPathNavigator.cs
- RightsManagementEncryptionTransform.cs
- FormattedText.cs
- DesignerActionItemCollection.cs
- IsolatedStorageFile.cs
- HostedElements.cs
- MessagePartProtectionMode.cs
- DBCSCodePageEncoding.cs
- Size3D.cs
- Console.cs
- SynchronizationContext.cs
- DataGridViewDataConnection.cs
- SystemFonts.cs
- securitycriticaldataClass.cs
- CodeGroup.cs
- Pkcs7Signer.cs
- CalendarDay.cs
- DataChangedEventManager.cs
- CheckedListBox.cs
- ResourceDefaultValueAttribute.cs
- RegexNode.cs
- OdbcCommandBuilder.cs
- RepeatButtonAutomationPeer.cs
- XmlLinkedNode.cs
- TemplateControlCodeDomTreeGenerator.cs
- CompilerResults.cs
- CodeDirectoryCompiler.cs
- CodePageUtils.cs
- ElementAction.cs
- OutOfMemoryException.cs
- DesignRelation.cs
- EdmRelationshipNavigationPropertyAttribute.cs
- RowToParametersTransformer.cs
- RequestQueryProcessor.cs
- DirectoryGroupQuery.cs
- WindowsSysHeader.cs
- HttpListenerRequest.cs
- SectionVisual.cs
- SourceFileInfo.cs
- CompatibleIComparer.cs
- WizardPanel.cs
- ClientEventManager.cs
- XmlCharacterData.cs
- Predicate.cs
- Stackframe.cs
- DataBindingExpressionBuilder.cs
- XslVisitor.cs
- XmlSchemaComplexType.cs
- UnaryExpression.cs
- XmlSchemaValidator.cs
- DataSourceControl.cs
- VerticalAlignConverter.cs
- SeekStoryboard.cs
- FrugalList.cs
- WebPartUserCapability.cs
- SqlConnectionHelper.cs
- ScrollProviderWrapper.cs
- Pool.cs
- PanningMessageFilter.cs
- SubstitutionList.cs
- XpsSerializerWriter.cs
- Char.cs
- DesignerValidatorAdapter.cs
- IntranetCredentialPolicy.cs
- ToolStripGripRenderEventArgs.cs
- Pts.cs
- BinarySerializer.cs
- TypedRowHandler.cs
- HtmlTable.cs
- MetadataItemEmitter.cs
- StorageSetMapping.cs
- DataGridColumnStyleMappingNameEditor.cs
- WebPartExportVerb.cs
- TrackingMemoryStream.cs
- XmlAttributeOverrides.cs
- HyperLinkStyle.cs
- MemberCollection.cs