Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Xml / System / Xml / XPath / Internal / FilterQuery.cs / 1305376 / FilterQuery.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.Globalization; using System.Xml.Xsl; internal sealed class FilterQuery : BaseAxisQuery { private Query cond; private bool noPosition; public FilterQuery(Query qyParent, Query cond, bool noPosition) : base(qyParent) { this.cond = cond; this.noPosition = noPosition; } private FilterQuery(FilterQuery other) : base(other) { this.cond = Clone(other.cond); this.noPosition = other.noPosition; } public override void Reset() { cond.Reset(); base.Reset(); } public Query Condition { get { return cond; } } public override void SetXsltContext(XsltContext input) { base.SetXsltContext(input); cond.SetXsltContext(input); if (cond.StaticType != XPathResultType.Number && cond.StaticType != XPathResultType.Any && noPosition) { // BugBug: We can do such trick at Evaluate time only. // But to do this FilterQuery should stop inherit from BaseAxisQuery ReversePositionQuery query = qyInput as ReversePositionQuery; if (query != null) { qyInput = query.input; } } } public override XPathNavigator Advance() { while ((currentNode = qyInput.Advance()) != null) { if (EvaluatePredicate()) { position++; return currentNode; } } return null; } internal bool EvaluatePredicate() { object value = cond.Evaluate(qyInput); if (value is XPathNodeIterator) return cond.Advance() != null; if (value is string ) return ((string)value).Length != 0; if (value is double ) return (((double)value) == qyInput.CurrentPosition); if (value is bool ) return (bool)value; Debug.Assert(value is XPathNavigator, "Unknown value type"); return true; } public override XPathNavigator MatchNode(XPathNavigator current) { XPathNavigator context; if (current == null) { return null; } context = qyInput.MatchNode(current); if (context != null) { // In this switch we process some special case in wich we can calculate predicate faster then in generic case switch (cond.StaticType) { case XPathResultType.Number: OperandQuery operand = cond as OperandQuery; if (operand != null) { double val = (double)operand.val; ChildrenQuery childrenQuery = qyInput as ChildrenQuery; if (childrenQuery != null) { // foo[2], but not foo[expr][2] XPathNavigator result = current.Clone(); result.MoveToParent(); int i = 0; result.MoveToFirstChild(); do { if (childrenQuery.matches(result)) { i++; if (current.IsSamePosition(result)) { return val == i ? context : null; } } } while (result.MoveToNext()); return null; } AttributeQuery attributeQuery = qyInput as AttributeQuery; if (attributeQuery != null) {// @foo[3], but not @foo[expr][2] XPathNavigator result = current.Clone(); result.MoveToParent(); int i = 0; result.MoveToFirstAttribute(); do { if (attributeQuery.matches(result)) { i++; if (current.IsSamePosition(result)) { return val == i ? context : null; } } } while (result.MoveToNextAttribute()); return null; } } break; case XPathResultType.NodeSet: cond.Evaluate(new XPathSingletonIterator(current, /*moved:*/true)); return (cond.Advance() != null) ? context : null; case XPathResultType.Boolean: if (noPosition) { return ((bool)cond.Evaluate(new XPathSingletonIterator(current, /*moved:*/true))) ? context : null; } break; case XPathResultType.String: if (noPosition) { return (((string)cond.Evaluate(new XPathSingletonIterator(current, /*moved:*/true))).Length != 0) ? context : null; } break; case XPathResultType_Navigator: return context; default: return null; } /* Generic case */ { Evaluate(new XPathSingletonIterator(context, /*moved:*/true)); XPathNavigator result; while ((result = Advance()) != null) { if (result.IsSamePosition(current)) { return context; } } } } return null; } public override QueryProps Properties { get { return QueryProps.Position | (qyInput.Properties & (QueryProps.Merge | QueryProps.Reverse)); } } public override XPathNodeIterator Clone() { return new FilterQuery(this); } public override void PrintQuery(XmlWriter w) { w.WriteStartElement(this.GetType().Name); if (! noPosition ) { w.WriteAttributeString("position", "yes"); } qyInput.PrintQuery(w); cond.PrintQuery(w); w.WriteEndElement(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// 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.Globalization; using System.Xml.Xsl; internal sealed class FilterQuery : BaseAxisQuery { private Query cond; private bool noPosition; public FilterQuery(Query qyParent, Query cond, bool noPosition) : base(qyParent) { this.cond = cond; this.noPosition = noPosition; } private FilterQuery(FilterQuery other) : base(other) { this.cond = Clone(other.cond); this.noPosition = other.noPosition; } public override void Reset() { cond.Reset(); base.Reset(); } public Query Condition { get { return cond; } } public override void SetXsltContext(XsltContext input) { base.SetXsltContext(input); cond.SetXsltContext(input); if (cond.StaticType != XPathResultType.Number && cond.StaticType != XPathResultType.Any && noPosition) { // BugBug: We can do such trick at Evaluate time only. // But to do this FilterQuery should stop inherit from BaseAxisQuery ReversePositionQuery query = qyInput as ReversePositionQuery; if (query != null) { qyInput = query.input; } } } public override XPathNavigator Advance() { while ((currentNode = qyInput.Advance()) != null) { if (EvaluatePredicate()) { position++; return currentNode; } } return null; } internal bool EvaluatePredicate() { object value = cond.Evaluate(qyInput); if (value is XPathNodeIterator) return cond.Advance() != null; if (value is string ) return ((string)value).Length != 0; if (value is double ) return (((double)value) == qyInput.CurrentPosition); if (value is bool ) return (bool)value; Debug.Assert(value is XPathNavigator, "Unknown value type"); return true; } public override XPathNavigator MatchNode(XPathNavigator current) { XPathNavigator context; if (current == null) { return null; } context = qyInput.MatchNode(current); if (context != null) { // In this switch we process some special case in wich we can calculate predicate faster then in generic case switch (cond.StaticType) { case XPathResultType.Number: OperandQuery operand = cond as OperandQuery; if (operand != null) { double val = (double)operand.val; ChildrenQuery childrenQuery = qyInput as ChildrenQuery; if (childrenQuery != null) { // foo[2], but not foo[expr][2] XPathNavigator result = current.Clone(); result.MoveToParent(); int i = 0; result.MoveToFirstChild(); do { if (childrenQuery.matches(result)) { i++; if (current.IsSamePosition(result)) { return val == i ? context : null; } } } while (result.MoveToNext()); return null; } AttributeQuery attributeQuery = qyInput as AttributeQuery; if (attributeQuery != null) {// @foo[3], but not @foo[expr][2] XPathNavigator result = current.Clone(); result.MoveToParent(); int i = 0; result.MoveToFirstAttribute(); do { if (attributeQuery.matches(result)) { i++; if (current.IsSamePosition(result)) { return val == i ? context : null; } } } while (result.MoveToNextAttribute()); return null; } } break; case XPathResultType.NodeSet: cond.Evaluate(new XPathSingletonIterator(current, /*moved:*/true)); return (cond.Advance() != null) ? context : null; case XPathResultType.Boolean: if (noPosition) { return ((bool)cond.Evaluate(new XPathSingletonIterator(current, /*moved:*/true))) ? context : null; } break; case XPathResultType.String: if (noPosition) { return (((string)cond.Evaluate(new XPathSingletonIterator(current, /*moved:*/true))).Length != 0) ? context : null; } break; case XPathResultType_Navigator: return context; default: return null; } /* Generic case */ { Evaluate(new XPathSingletonIterator(context, /*moved:*/true)); XPathNavigator result; while ((result = Advance()) != null) { if (result.IsSamePosition(current)) { return context; } } } } return null; } public override QueryProps Properties { get { return QueryProps.Position | (qyInput.Properties & (QueryProps.Merge | QueryProps.Reverse)); } } public override XPathNodeIterator Clone() { return new FilterQuery(this); } public override void PrintQuery(XmlWriter w) { w.WriteStartElement(this.GetType().Name); if (! noPosition ) { w.WriteAttributeString("position", "yes"); } qyInput.PrintQuery(w); cond.PrintQuery(w); w.WriteEndElement(); } } } // 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
- ValidationError.cs
- assertwrapper.cs
- DBPropSet.cs
- WindowsNonControl.cs
- ProfileProvider.cs
- XslTransform.cs
- NotFiniteNumberException.cs
- WebPartConnectionsConfigureVerb.cs
- OleDbParameterCollection.cs
- controlskin.cs
- Quaternion.cs
- RoleManagerEventArgs.cs
- UnsafeNativeMethods.cs
- ListenerElementsCollection.cs
- ControlCollection.cs
- GenerateTemporaryTargetAssembly.cs
- ListItemConverter.cs
- HTTPNotFoundHandler.cs
- DisplayNameAttribute.cs
- _HeaderInfoTable.cs
- PassportAuthenticationModule.cs
- ListViewItem.cs
- safesecurityhelperavalon.cs
- BindableAttribute.cs
- DataObject.cs
- GridViewRowPresenterBase.cs
- HtmlInputControl.cs
- DoubleAnimation.cs
- EpmSourcePathSegment.cs
- ToolstripProfessionalRenderer.cs
- BuildProviderAppliesToAttribute.cs
- Converter.cs
- InnerItemCollectionView.cs
- FormatException.cs
- XmlAttributeProperties.cs
- GridToolTip.cs
- BoundPropertyEntry.cs
- ThreadExceptionEvent.cs
- CreationContext.cs
- GridViewCancelEditEventArgs.cs
- UICuesEvent.cs
- Documentation.cs
- DirectionalLight.cs
- MonikerSyntaxException.cs
- CounterCreationDataCollection.cs
- Int32.cs
- UserControl.cs
- Visual3D.cs
- AuthorizationSection.cs
- StrokeDescriptor.cs
- BooleanConverter.cs
- UnmanagedMarshal.cs
- TextFormatterHost.cs
- DefaultTraceListener.cs
- MarkupCompiler.cs
- SiteOfOriginPart.cs
- RemotingException.cs
- ListBoxAutomationPeer.cs
- TagPrefixCollection.cs
- DrawListViewItemEventArgs.cs
- ColorBlend.cs
- TextTreeTextBlock.cs
- ClientSettings.cs
- ValueOfAction.cs
- ColorConverter.cs
- ConfigurationStrings.cs
- ConfigurationPropertyAttribute.cs
- DBParameter.cs
- EventSinkHelperWriter.cs
- WindowsListViewGroupHelper.cs
- IPCCacheManager.cs
- DragEventArgs.cs
- WindowVisualStateTracker.cs
- UniformGrid.cs
- Authorization.cs
- _Connection.cs
- MulticastOption.cs
- PerspectiveCamera.cs
- PathStreamGeometryContext.cs
- SynchronizationLockException.cs
- Validator.cs
- CharStorage.cs
- ContentTextAutomationPeer.cs
- MissingFieldException.cs
- Stream.cs
- _SafeNetHandles.cs
- Shared.cs
- BigInt.cs
- LinkedList.cs
- FirewallWrapper.cs
- InfoCardRSAOAEPKeyExchangeDeformatter.cs
- PartitionedStream.cs
- SqlDataAdapter.cs
- ListViewGroupItemCollection.cs
- SqlCommandAsyncResult.cs
- UniqueIdentifierService.cs
- CopyNamespacesAction.cs
- SamlSubject.cs
- Line.cs
- PagesSection.cs