Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Xml / System / Xml / XPath / Internal / precedingsibling.cs / 1305376 / precedingsibling.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace MS.Internal.Xml.XPath { using System; using System.Xml; using System.Xml.XPath; using System.Diagnostics; using System.Collections.Generic; // This class can be rewritten much more efficient. // Algorithm could be like one for FollowingSibling: // - Build InputArrays: pares (first, sentinel) // -- Cash all input nodes as sentinel // -- Add firts node of its parent for each input node. // -- Sort these pares by first nodes. // - Advance algorithm will look like: // -- For each row in InputArays we will output first node + all its following nodes which are < sentinel // -- Before outputing each node in row #I we will check that it is < first node in row #I+1 // --- if true we actualy output it // --- if false, we hold with row #I and apply this algorith starting for row #I+1 // --- when we done with #I+1 we continue with row #I internal class PreSiblingQuery : CacheAxisQuery { public PreSiblingQuery(Query qyInput, string name, string prefix, XPathNodeType typeTest) : base (qyInput, name, prefix, typeTest) {} protected PreSiblingQuery(PreSiblingQuery other) : base(other) {} private bool NotVisited(XPathNavigator nav, ListparentStk){ XPathNavigator nav1 = nav.Clone(); nav1.MoveToParent(); for (int i = 0; i < parentStk.Count; i++) { if (nav1.IsSamePosition(parentStk[i])) { return false; } } parentStk.Add(nav1); return true; } public override object Evaluate(XPathNodeIterator context) { base.Evaluate(context); // Fill up base.outputBuffer List parentStk = new List (); Stack inputStk = new Stack (); while ((currentNode = qyInput.Advance()) != null) { inputStk.Push(currentNode.Clone()); } while (inputStk.Count != 0) { XPathNavigator input = inputStk.Pop(); if (input.NodeType == XPathNodeType.Attribute || input.NodeType == XPathNodeType.Namespace) { continue; } if (NotVisited(input, parentStk)) { XPathNavigator prev = input.Clone(); if (prev.MoveToParent()) { bool test = prev.MoveToFirstChild(); Debug.Assert(test, "We just moved to parent, how we can not have first child?"); while (!prev.IsSamePosition(input)) { if (matches(prev)) { Insert(outputBuffer, prev); } if (!prev.MoveToNext()) { Debug.Fail("We managed to miss sentinel node (input)"); break; } } } } } return this; } public override XPathNodeIterator Clone() { return new PreSiblingQuery(this); } public override QueryProps Properties { get { return base.Properties | QueryProps.Reverse; } } } } // 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
- GuidelineCollection.cs
- ProvidersHelper.cs
- DecoderFallback.cs
- TargetException.cs
- DateTimeParse.cs
- DataRecord.cs
- XmlNamespaceDeclarationsAttribute.cs
- RectKeyFrameCollection.cs
- FunctionDescription.cs
- SetState.cs
- IconHelper.cs
- SQLInt64Storage.cs
- tabpagecollectioneditor.cs
- ListMarkerSourceInfo.cs
- mediapermission.cs
- CapabilitiesSection.cs
- GlobalizationAssembly.cs
- ClickablePoint.cs
- MenuScrollingVisibilityConverter.cs
- TabControl.cs
- DelayedRegex.cs
- SQLGuidStorage.cs
- HttpRequest.cs
- CodeDOMUtility.cs
- XmlHierarchicalEnumerable.cs
- DataColumnCollection.cs
- Geometry3D.cs
- OneToOneMappingSerializer.cs
- CodeTypeReference.cs
- LayeredChannelFactory.cs
- SaveFileDialog.cs
- RpcCryptoRequest.cs
- CodeCommentStatementCollection.cs
- MatrixAnimationBase.cs
- DefaultBindingPropertyAttribute.cs
- FieldDescriptor.cs
- SplineKeyFrames.cs
- ResourceManagerWrapper.cs
- StringBuilder.cs
- DBBindings.cs
- MenuItemCollection.cs
- Rect.cs
- NumericUpDownAcceleration.cs
- CommandBinding.cs
- PagerSettings.cs
- ListViewContainer.cs
- ResponseStream.cs
- TextOptions.cs
- XmlRootAttribute.cs
- ChtmlLinkAdapter.cs
- WebEvents.cs
- FormsAuthentication.cs
- ThreadStateException.cs
- assemblycache.cs
- XmlNode.cs
- DataViewSettingCollection.cs
- X509ChainElement.cs
- BlurEffect.cs
- AssemblyAttributesGoHere.cs
- RSAOAEPKeyExchangeDeformatter.cs
- XmlEncoding.cs
- NativeMethodsOther.cs
- Int32AnimationUsingKeyFrames.cs
- DbExpressionBuilder.cs
- OutputCacheProfileCollection.cs
- FontFamily.cs
- PresentationAppDomainManager.cs
- Converter.cs
- versioninfo.cs
- Win32NamedPipes.cs
- PageParser.cs
- OracleColumn.cs
- SchemaAttDef.cs
- SystemIPGlobalStatistics.cs
- StrokeNodeOperations.cs
- MetadataItemSerializer.cs
- HttpBufferlessInputStream.cs
- DataGridViewLinkCell.cs
- DataSpaceManager.cs
- MissingFieldException.cs
- BuildProvidersCompiler.cs
- AutoResizedEvent.cs
- ExtensionSimplifierMarkupObject.cs
- ColumnHeaderConverter.cs
- RemotingServices.cs
- Action.cs
- ObjRef.cs
- XslCompiledTransform.cs
- ObjectViewListener.cs
- SeekStoryboard.cs
- XmlIlVisitor.cs
- WebPartConnectionsCloseVerb.cs
- OdbcConnection.cs
- CellIdBoolean.cs
- ProcessInputEventArgs.cs
- CroppedBitmap.cs
- ResourceAttributes.cs
- VectorValueSerializer.cs
- AppSettingsExpressionBuilder.cs
- WindowInteropHelper.cs