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 / Structures / CellTreeNodeVisitors.cs / 1 / CellTreeNodeVisitors.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Collections.Generic; using System.Data.Common.Utils.Boolean; using System.Diagnostics; using System.Data.Common.Utils; using System.Data.Metadata.Edm; namespace System.Data.Mapping.ViewGeneration.Structures { using WrapperBoolExpr = BoolExpr; using WrapperTreeExpr = TreeExpr ; using WrapperAndExpr = AndExpr ; using WrapperOrExpr = OrExpr ; using WrapperNotExpr = NotExpr ; using WrapperTermExpr = TermExpr ; using WrapperTrueExpr = TrueExpr ; using WrapperFalseExpr = FalseExpr ; internal partial class CellTreeNode { #region Abstract Visitors // Abstract visitor implementation for Cell trees // TOutput is the return type of the visitor and TInput is a single // parameter that can be passed in internal abstract class CellTreeVisitor { internal abstract TOutput VisitLeaf(LeafCellTreeNode node, TInput param); internal abstract TOutput VisitUnion(OpCellTreeNode node, TInput param); internal abstract TOutput VisitInnerJoin(OpCellTreeNode node, TInput param); internal abstract TOutput VisitLeftOuterJoin(OpCellTreeNode node, TInput param); internal abstract TOutput VisitFullOuterJoin(OpCellTreeNode node, TInput param); internal abstract TOutput VisitLeftAntiSemiJoin(OpCellTreeNode node, TInput param); } // Another abstract visitor that does not distinguish between different // operation nodes internal abstract class SimpleCellTreeVisitor { internal abstract TOutput VisitLeaf(LeafCellTreeNode node, TInput param); internal abstract TOutput VisitOpNode(OpCellTreeNode node, TInput param); } #endregion #region Default CellTree Visitor // Default visitor implementation for CellTreeVisitor // TInput is the type of the parameter that can be passed in to each visit // Returns a CellTreeVisitor as output private class DefaultCellTreeVisitor : CellTreeVisitor { internal override CellTreeNode VisitLeaf(LeafCellTreeNode node, TInput param) { return node; } internal override CellTreeNode VisitUnion(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } internal override CellTreeNode VisitInnerJoin(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } internal override CellTreeNode VisitLeftOuterJoin(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } internal override CellTreeNode VisitFullOuterJoin(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } internal override CellTreeNode VisitLeftAntiSemiJoin(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } private OpCellTreeNode AcceptChildren(OpCellTreeNode node, TInput param) { List newChildren = new List (); foreach (CellTreeNode child in node.Children) { newChildren.Add(child.Accept(this, param)); } return new OpCellTreeNode(node.CellNormalizer, node.OpType, newChildren); } } #endregion #region Flattening Visitor // Flattens the tree, i.e., pushes up nodes that just have just one child private class FlatteningVisitor : SimpleCellTreeVisitor { #region Constructor/Fields/Invocation protected FlatteningVisitor() { } // effects: Flattens node and returns a new tree that is flattened internal static CellTreeNode Flatten(CellTreeNode node) { FlatteningVisitor visitor = new FlatteningVisitor(); return node.Accept (visitor, true); } #endregion #region Visitors internal override CellTreeNode VisitLeaf(LeafCellTreeNode node, bool dummy) { return node; } // effects: Visits an internal Op node and processes it internal override CellTreeNode VisitOpNode(OpCellTreeNode node, bool dummy) { // Flatten the children first List flattenedChildren = new List (); foreach (CellTreeNode child in node.Children) { CellTreeNode flattenedChild = child.Accept (this, dummy); flattenedChildren.Add(flattenedChild); } Debug.Assert(flattenedChildren.Count >= 1, "node must have more than 1 child and be an OpCellTreeNode"); // If only one child, return that if (flattenedChildren.Count == 1) { return flattenedChildren[0]; } Debug.Assert(flattenedChildren.Count > 1, "Opnode has 0 children?"); Debug.Assert(node.OpType != CellTreeOpType.Leaf, "Wrong op type for operation node"); OpCellTreeNode result = new OpCellTreeNode(node.CellNormalizer, node.OpType, flattenedChildren); return result; } #endregion } #endregion #region AssociativeOpFlatteningVisitor // Flattens associative ops and single children nodes. Like the // FlatteningVisitor, it gets rid of the single children // nodes. Furthermore, it also collapses nodes of associative operations, // i.e., A IJ (B IJ C) is changed to A IJ B IJ C private class AssociativeOpFlatteningVisitor : SimpleCellTreeVisitor { #region Constructor/Fields/Invocation private AssociativeOpFlatteningVisitor() { } internal static CellTreeNode Flatten(CellTreeNode node) { // First do simple flattening and then associative op flattening CellTreeNode newNode = FlatteningVisitor.Flatten(node); AssociativeOpFlatteningVisitor visitor = new AssociativeOpFlatteningVisitor(); return newNode.Accept (visitor, true); } #endregion #region Visitors internal override CellTreeNode VisitLeaf(LeafCellTreeNode node, bool dummy) { return node; } internal override CellTreeNode VisitOpNode(OpCellTreeNode node, bool dummy) { List flattenedChildren = new List (); // Flatten the children first foreach (CellTreeNode child in node.Children) { CellTreeNode flattenedChild = child.Accept (this, dummy); flattenedChildren.Add(flattenedChild); } Debug.Assert(flattenedChildren.Count > 1, "node must have more than 1 child and be an OpCellTreeNode"); // If this op is associative and a child's OP is the same as this // op, add those to be this nodes children List finalChildren = flattenedChildren; if (CellTreeNode.IsAssociativeOp(node.OpType)) { finalChildren = new List (); foreach (CellTreeNode child in flattenedChildren) { if (child.OpType == node.OpType) { finalChildren.AddRange(child.Children); } else { finalChildren.Add(child); } } } OpCellTreeNode result = new OpCellTreeNode(node.CellNormalizer, node.OpType, finalChildren); return result; } #endregion } #endregion #region LeafVisitor // This visitor returns all the leaf tree nodes in this private class LeafVisitor : SimpleCellTreeVisitor > { private LeafVisitor() { } internal static List GetLeaves(CellTreeNode node) { LeafVisitor visitor = new LeafVisitor(); IEnumerable leaves = node.Accept >(visitor, true); return new List (leaves); } internal override IEnumerable VisitLeaf(LeafCellTreeNode node, bool dummy) { yield return node.LeftCellWrapper; } internal override IEnumerable VisitOpNode(OpCellTreeNode node, bool dummy) { foreach (CellTreeNode child in node.Children) { IEnumerable children = child.Accept >(this, dummy); foreach (LeftCellWrapper wrapper in children) { yield return wrapper; } } } } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Collections.Generic; using System.Data.Common.Utils.Boolean; using System.Diagnostics; using System.Data.Common.Utils; using System.Data.Metadata.Edm; namespace System.Data.Mapping.ViewGeneration.Structures { using WrapperBoolExpr = BoolExpr; using WrapperTreeExpr = TreeExpr ; using WrapperAndExpr = AndExpr ; using WrapperOrExpr = OrExpr ; using WrapperNotExpr = NotExpr ; using WrapperTermExpr = TermExpr ; using WrapperTrueExpr = TrueExpr ; using WrapperFalseExpr = FalseExpr ; internal partial class CellTreeNode { #region Abstract Visitors // Abstract visitor implementation for Cell trees // TOutput is the return type of the visitor and TInput is a single // parameter that can be passed in internal abstract class CellTreeVisitor { internal abstract TOutput VisitLeaf(LeafCellTreeNode node, TInput param); internal abstract TOutput VisitUnion(OpCellTreeNode node, TInput param); internal abstract TOutput VisitInnerJoin(OpCellTreeNode node, TInput param); internal abstract TOutput VisitLeftOuterJoin(OpCellTreeNode node, TInput param); internal abstract TOutput VisitFullOuterJoin(OpCellTreeNode node, TInput param); internal abstract TOutput VisitLeftAntiSemiJoin(OpCellTreeNode node, TInput param); } // Another abstract visitor that does not distinguish between different // operation nodes internal abstract class SimpleCellTreeVisitor { internal abstract TOutput VisitLeaf(LeafCellTreeNode node, TInput param); internal abstract TOutput VisitOpNode(OpCellTreeNode node, TInput param); } #endregion #region Default CellTree Visitor // Default visitor implementation for CellTreeVisitor // TInput is the type of the parameter that can be passed in to each visit // Returns a CellTreeVisitor as output private class DefaultCellTreeVisitor : CellTreeVisitor { internal override CellTreeNode VisitLeaf(LeafCellTreeNode node, TInput param) { return node; } internal override CellTreeNode VisitUnion(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } internal override CellTreeNode VisitInnerJoin(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } internal override CellTreeNode VisitLeftOuterJoin(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } internal override CellTreeNode VisitFullOuterJoin(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } internal override CellTreeNode VisitLeftAntiSemiJoin(OpCellTreeNode node, TInput param) { return AcceptChildren(node, param); } private OpCellTreeNode AcceptChildren(OpCellTreeNode node, TInput param) { List newChildren = new List (); foreach (CellTreeNode child in node.Children) { newChildren.Add(child.Accept(this, param)); } return new OpCellTreeNode(node.CellNormalizer, node.OpType, newChildren); } } #endregion #region Flattening Visitor // Flattens the tree, i.e., pushes up nodes that just have just one child private class FlatteningVisitor : SimpleCellTreeVisitor { #region Constructor/Fields/Invocation protected FlatteningVisitor() { } // effects: Flattens node and returns a new tree that is flattened internal static CellTreeNode Flatten(CellTreeNode node) { FlatteningVisitor visitor = new FlatteningVisitor(); return node.Accept (visitor, true); } #endregion #region Visitors internal override CellTreeNode VisitLeaf(LeafCellTreeNode node, bool dummy) { return node; } // effects: Visits an internal Op node and processes it internal override CellTreeNode VisitOpNode(OpCellTreeNode node, bool dummy) { // Flatten the children first List flattenedChildren = new List (); foreach (CellTreeNode child in node.Children) { CellTreeNode flattenedChild = child.Accept (this, dummy); flattenedChildren.Add(flattenedChild); } Debug.Assert(flattenedChildren.Count >= 1, "node must have more than 1 child and be an OpCellTreeNode"); // If only one child, return that if (flattenedChildren.Count == 1) { return flattenedChildren[0]; } Debug.Assert(flattenedChildren.Count > 1, "Opnode has 0 children?"); Debug.Assert(node.OpType != CellTreeOpType.Leaf, "Wrong op type for operation node"); OpCellTreeNode result = new OpCellTreeNode(node.CellNormalizer, node.OpType, flattenedChildren); return result; } #endregion } #endregion #region AssociativeOpFlatteningVisitor // Flattens associative ops and single children nodes. Like the // FlatteningVisitor, it gets rid of the single children // nodes. Furthermore, it also collapses nodes of associative operations, // i.e., A IJ (B IJ C) is changed to A IJ B IJ C private class AssociativeOpFlatteningVisitor : SimpleCellTreeVisitor { #region Constructor/Fields/Invocation private AssociativeOpFlatteningVisitor() { } internal static CellTreeNode Flatten(CellTreeNode node) { // First do simple flattening and then associative op flattening CellTreeNode newNode = FlatteningVisitor.Flatten(node); AssociativeOpFlatteningVisitor visitor = new AssociativeOpFlatteningVisitor(); return newNode.Accept (visitor, true); } #endregion #region Visitors internal override CellTreeNode VisitLeaf(LeafCellTreeNode node, bool dummy) { return node; } internal override CellTreeNode VisitOpNode(OpCellTreeNode node, bool dummy) { List flattenedChildren = new List (); // Flatten the children first foreach (CellTreeNode child in node.Children) { CellTreeNode flattenedChild = child.Accept (this, dummy); flattenedChildren.Add(flattenedChild); } Debug.Assert(flattenedChildren.Count > 1, "node must have more than 1 child and be an OpCellTreeNode"); // If this op is associative and a child's OP is the same as this // op, add those to be this nodes children List finalChildren = flattenedChildren; if (CellTreeNode.IsAssociativeOp(node.OpType)) { finalChildren = new List (); foreach (CellTreeNode child in flattenedChildren) { if (child.OpType == node.OpType) { finalChildren.AddRange(child.Children); } else { finalChildren.Add(child); } } } OpCellTreeNode result = new OpCellTreeNode(node.CellNormalizer, node.OpType, finalChildren); return result; } #endregion } #endregion #region LeafVisitor // This visitor returns all the leaf tree nodes in this private class LeafVisitor : SimpleCellTreeVisitor > { private LeafVisitor() { } internal static List GetLeaves(CellTreeNode node) { LeafVisitor visitor = new LeafVisitor(); IEnumerable leaves = node.Accept >(visitor, true); return new List (leaves); } internal override IEnumerable VisitLeaf(LeafCellTreeNode node, bool dummy) { yield return node.LeftCellWrapper; } internal override IEnumerable VisitOpNode(OpCellTreeNode node, bool dummy) { foreach (CellTreeNode child in node.Children) { IEnumerable children = child.Accept >(this, dummy); foreach (LeftCellWrapper wrapper in children) { yield return wrapper; } } } } #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
- HitTestWithPointDrawingContextWalker.cs
- ThrowOnMultipleAssignment.cs
- TemplateInstanceAttribute.cs
- FloaterParaClient.cs
- WebPartCollection.cs
- Update.cs
- ConfigXmlAttribute.cs
- WmlObjectListAdapter.cs
- _HeaderInfo.cs
- ValidationVisibilityAttribute.cs
- WebBrowsableAttribute.cs
- SourceLineInfo.cs
- EncryptedPackageFilter.cs
- CollectionViewGroupRoot.cs
- XsltFunctions.cs
- SimpleTextLine.cs
- RegisteredDisposeScript.cs
- PolicyManager.cs
- DisplayNameAttribute.cs
- MimeReflector.cs
- DeploymentSection.cs
- OdbcRowUpdatingEvent.cs
- HScrollBar.cs
- TableCellCollection.cs
- PermissionSet.cs
- WCFServiceClientProxyGenerator.cs
- WindowsPrincipal.cs
- filewebresponse.cs
- SynchronizedInputHelper.cs
- SqlPersonalizationProvider.cs
- AuthenticationSchemesHelper.cs
- ProxyGenerationError.cs
- MouseEvent.cs
- ClientApiGenerator.cs
- HttpCacheVaryByContentEncodings.cs
- ChtmlCommandAdapter.cs
- ObjectContextServiceProvider.cs
- WebPartDisplayModeEventArgs.cs
- LogicalCallContext.cs
- NativeMethods.cs
- SettingsPropertyIsReadOnlyException.cs
- ListViewSortEventArgs.cs
- SqlBinder.cs
- PropertyRecord.cs
- Context.cs
- HttpServerUtilityWrapper.cs
- RawUIStateInputReport.cs
- ByteAnimationBase.cs
- OutputScopeManager.cs
- ViewBox.cs
- BitFlagsGenerator.cs
- IODescriptionAttribute.cs
- HttpModuleCollection.cs
- LocalizableAttribute.cs
- AutoSizeComboBox.cs
- TraceUtils.cs
- CustomErrorsSection.cs
- NegotiateStream.cs
- ContainerParaClient.cs
- AjaxFrameworkAssemblyAttribute.cs
- precedingsibling.cs
- SiteMapProvider.cs
- AssemblyAttributes.cs
- PerformanceCounterPermissionEntry.cs
- XamlFxTrace.cs
- SQLByteStorage.cs
- TagMapCollection.cs
- ChangePasswordAutoFormat.cs
- TextRangeEdit.cs
- SocketSettings.cs
- ExpressionBuilder.cs
- Matrix.cs
- MeasurementDCInfo.cs
- SynchronizationContext.cs
- ThreadInterruptedException.cs
- DefaultParameterValueAttribute.cs
- XmlSerializerVersionAttribute.cs
- WmlLinkAdapter.cs
- RequestCachingSection.cs
- RSAPKCS1KeyExchangeDeformatter.cs
- HttpCookieCollection.cs
- LayoutManager.cs
- Int16Animation.cs
- FileVersionInfo.cs
- RowToParametersTransformer.cs
- DesignerMetadata.cs
- IProducerConsumerCollection.cs
- TrackingExtract.cs
- RawStylusActions.cs
- SQLInt16.cs
- WriteableBitmap.cs
- MoveSizeWinEventHandler.cs
- HMACSHA1.cs
- FamilyMap.cs
- TimelineGroup.cs
- XmlNodeReader.cs
- ConfigurationStrings.cs
- EditingCommands.cs
- MailDefinition.cs
- FileDetails.cs