Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Xml / System / Xml / XPath / Internal / FunctionQuery.cs / 1305376 / FunctionQuery.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace MS.Internal.Xml.XPath { using System; using System.Xml; using System.Xml.Xsl; using System.Xml.XPath; using System.Diagnostics; using System.Globalization; using System.Collections.Generic; internal sealed class FunctionQuery : ExtensionQuery { private IListargs; private IXsltContextFunction function; public FunctionQuery(string prefix, string name, List args) : base(prefix, name) { this.args = args; } private FunctionQuery(FunctionQuery other) : base(other) { this.function = other.function; Query[] tmp = new Query[other.args.Count]; { for (int i = 0; i < tmp.Length; i ++) { tmp[i] = Clone(other.args[i]); } args = tmp; } this.args = tmp; } public override void SetXsltContext(XsltContext context) { if (context == null) { throw XPathException.Create(Res.Xp_NoContext); } if (this.xsltContext != context) { xsltContext = context; foreach (Query argument in args) { argument.SetXsltContext(context); } XPathResultType[] argTypes = new XPathResultType[args.Count]; for(int i = 0; i < args.Count; i ++) { argTypes[i] = args[i].StaticType; } function = xsltContext.ResolveFunction(prefix, name, argTypes); // KB article allows to return null, see http://support.microsoft.com/?kbid=324462#6 if (function == null) { throw XPathException.Create(Res.Xp_UndefFunc, QName); } } } public override object Evaluate(XPathNodeIterator nodeIterator) { if (xsltContext == null) { throw XPathException.Create(Res.Xp_NoContext); } // calculate arguments: object[] argVals = new object[args.Count]; for (int i = 0; i < args.Count; i ++) { argVals[i] = args[i].Evaluate(nodeIterator); if (argVals[i] is XPathNodeIterator) {// ForBack Compat. To protect our queries from users. bug#372077 & 20006123 argVals[i] = new XPathSelectionIterator(nodeIterator.Current, args[i]); } } try { return ProcessResult(function.Invoke(xsltContext, argVals, nodeIterator.Current)); } catch(Exception ex) { throw XPathException.Create(Res.Xp_FunctionFailed, QName, ex); } } public override XPathNavigator MatchNode(XPathNavigator navigator) { if (name != "key" && prefix.Length != 0) { throw XPathException.Create(Res.Xp_InvalidPattern); } this.Evaluate(new XPathSingletonIterator(navigator, /*moved:*/true)); XPathNavigator nav = null; while ((nav = this.Advance()) != null) { if (nav.IsSamePosition(navigator)) { return nav; } } return nav; } public override XPathResultType StaticType { get { XPathResultType result = function != null ? function.ReturnType : XPathResultType.Any; if (result == XPathResultType.Error) { // In v.1 we confused Error & Any so now for backward compatibility we should allow users to return any of them. result = XPathResultType.Any; } return result; } } public override XPathNodeIterator Clone() { return new FunctionQuery(this); } public override void PrintQuery(XmlWriter w) { w.WriteStartElement(this.GetType().Name); w.WriteAttributeString("name", prefix.Length != 0 ? prefix + ':' + name : name); foreach(Query arg in this.args) { arg.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
- DrawingBrush.cs
- ComponentResourceKey.cs
- ReadOnlyDataSource.cs
- CodeTypeDelegate.cs
- DelegateTypeInfo.cs
- DataTableClearEvent.cs
- FormattedText.cs
- _Rfc2616CacheValidators.cs
- ConfigurationStrings.cs
- ToolConsole.cs
- ScrollItemPatternIdentifiers.cs
- WorkflowRequestContext.cs
- WebBrowserNavigatedEventHandler.cs
- ISSmlParser.cs
- ipaddressinformationcollection.cs
- FigureParaClient.cs
- MDIControlStrip.cs
- ToolboxComponentsCreatedEventArgs.cs
- _SslState.cs
- TreeNode.cs
- Char.cs
- TreeNodeClickEventArgs.cs
- OleDbErrorCollection.cs
- ServiceModelActivity.cs
- PickDesigner.xaml.cs
- SegmentInfo.cs
- WebControlParameterProxy.cs
- Italic.cs
- SafeHandles.cs
- MarkupObject.cs
- TextParagraphView.cs
- UnauthorizedWebPart.cs
- storepermission.cs
- AsmxEndpointPickerExtension.cs
- PolyQuadraticBezierSegment.cs
- ArcSegment.cs
- GridViewHeaderRowPresenter.cs
- SortDescriptionCollection.cs
- ProtocolException.cs
- ReadingWritingEntityEventArgs.cs
- TagElement.cs
- DataBindingCollectionConverter.cs
- IsolationInterop.cs
- XmlRootAttribute.cs
- Span.cs
- Visitors.cs
- SqlRewriteScalarSubqueries.cs
- DataObject.cs
- FormatterServices.cs
- GridViewColumnCollection.cs
- CallId.cs
- SimpleApplicationHost.cs
- Rfc4050KeyFormatter.cs
- Msec.cs
- StandardCommands.cs
- DataGridHeadersVisibilityToVisibilityConverter.cs
- AutoGeneratedFieldProperties.cs
- PartitionResolver.cs
- XmlTextAttribute.cs
- DropSource.cs
- ImageCodecInfoPrivate.cs
- QilValidationVisitor.cs
- FileVersionInfo.cs
- ServiceNameCollection.cs
- ValidationRuleCollection.cs
- DataTableReader.cs
- ButtonAutomationPeer.cs
- ToolStripContainerDesigner.cs
- DbReferenceCollection.cs
- ObjectQuery_EntitySqlExtensions.cs
- _StreamFramer.cs
- PointCollection.cs
- DataTrigger.cs
- PackagingUtilities.cs
- ToolStripSettings.cs
- StackBuilderSink.cs
- SharedConnectionWorkflowTransactionService.cs
- DataSet.cs
- XmlAttributeAttribute.cs
- ConfigXmlAttribute.cs
- StrictAndMessageFilter.cs
- TableParaClient.cs
- DatatypeImplementation.cs
- QilParameter.cs
- SqlBuffer.cs
- PropertyOrder.cs
- TableCellAutomationPeer.cs
- PerformanceCounterLib.cs
- TypeValidationEventArgs.cs
- HttpProfileGroupBase.cs
- ScriptControlManager.cs
- FixedFindEngine.cs
- ClipboardProcessor.cs
- MouseEventArgs.cs
- ServiceDiscoveryBehavior.cs
- RegisteredDisposeScript.cs
- PointCollectionValueSerializer.cs
- TypeGeneratedEventArgs.cs
- ScriptBehaviorDescriptor.cs
- WebPartZoneBase.cs