Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Xml / System / Xml / XPath / Internal / FilterQuery.cs / 1 / 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
![Network programming in C#, Network Programming in VB.NET, Network Programming in .NET](/images/book.jpg)
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- StrongTypingException.cs
- ContravarianceAdapter.cs
- tibetanshape.cs
- CodeTypeConstructor.cs
- RadioButton.cs
- SystemIcons.cs
- HttpPostedFile.cs
- WizardSideBarListControlItemEventArgs.cs
- DrawingContextDrawingContextWalker.cs
- Clock.cs
- TypeConvertions.cs
- FontUnitConverter.cs
- SoapAttributeOverrides.cs
- ReachDocumentReferenceCollectionSerializer.cs
- SingleAnimation.cs
- IncrementalReadDecoders.cs
- SerializerProvider.cs
- TypeAccessException.cs
- ColumnPropertiesGroup.cs
- RewritingValidator.cs
- SerTrace.cs
- DesignerDataStoredProcedure.cs
- GroupBoxDesigner.cs
- DocumentOrderQuery.cs
- HttpPostedFileWrapper.cs
- GrammarBuilder.cs
- XmlDataProvider.cs
- IPGlobalProperties.cs
- Inline.cs
- WCFBuildProvider.cs
- DeclarativeCatalogPart.cs
- XmlCodeExporter.cs
- MapPathBasedVirtualPathProvider.cs
- SpanIndex.cs
- ToolStripPanelDesigner.cs
- BulletChrome.cs
- DataColumnPropertyDescriptor.cs
- ICspAsymmetricAlgorithm.cs
- DatePicker.cs
- SchemaMapping.cs
- ItemMap.cs
- CatalogPartChrome.cs
- SoapIgnoreAttribute.cs
- OutputScopeManager.cs
- CFGGrammar.cs
- ProgressBar.cs
- ControlAdapter.cs
- DataGridViewCheckBoxColumn.cs
- EventlogProvider.cs
- FolderBrowserDialog.cs
- WindowsToolbarAsMenu.cs
- SHA256Managed.cs
- SrgsRule.cs
- HotSpotCollection.cs
- BasePattern.cs
- DetailsViewPagerRow.cs
- ProfilePropertySettingsCollection.cs
- DataSysAttribute.cs
- HttpConfigurationSystem.cs
- XmlObjectSerializerWriteContext.cs
- DockPattern.cs
- ScalarType.cs
- _Win32.cs
- Enlistment.cs
- ProcessModelInfo.cs
- HierarchicalDataTemplate.cs
- RtfToken.cs
- RightNameExpirationInfoPair.cs
- SchemaTableOptionalColumn.cs
- ContentPropertyAttribute.cs
- CompilerHelpers.cs
- XmlParserContext.cs
- SchemaElementLookUpTableEnumerator.cs
- Decimal.cs
- DesignerDataRelationship.cs
- GenericXmlSecurityToken.cs
- GenericWebPart.cs
- ToolStripSettings.cs
- ParamArrayAttribute.cs
- HotCommands.cs
- UdpContractFilterBehavior.cs
- KeyGestureConverter.cs
- ReadingWritingEntityEventArgs.cs
- UserPreferenceChangedEventArgs.cs
- EventProviderWriter.cs
- XmlAnyAttributeAttribute.cs
- ResponseBodyWriter.cs
- DynamicResourceExtensionConverter.cs
- WriteFileContext.cs
- EventLog.cs
- InheritablePropertyChangeInfo.cs
- FilePresentation.cs
- WhitespaceRuleReader.cs
- ResourceExpressionBuilder.cs
- unsafenativemethodsother.cs
- RecordManager.cs
- WebSysDisplayNameAttribute.cs
- SQLDateTimeStorage.cs
- PixelFormatConverter.cs
- HandlerFactoryWrapper.cs