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 / CompiledXpathExpr.cs / 1 / CompiledXpathExpr.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.Collections; using System.Xml.Xsl; internal class CompiledXpathExpr : XPathExpression { Query query; string expr; bool needContext; internal CompiledXpathExpr(Query query, string expression, bool needContext) { this.query = query; this.expr = expression; this.needContext = needContext; } internal Query QueryTree { get { if (needContext) { throw XPathException.Create(Res.Xp_NoContext); } return query; } } public override string Expression { get { return expr; } } public virtual void CheckErrors() { Debug.Assert(query != null, "In case of error in XPath we create ErrorXPathExpression"); } public override void AddSort(object expr, IComparer comparer) { // sort makes sense only when we are dealing with a query that // returns a nodeset. Query evalExpr; if (expr is string) { evalExpr = new QueryBuilder().Build((string)expr, out needContext); // this will throw if expr is invalid } else if (expr is CompiledXpathExpr) { evalExpr = ((CompiledXpathExpr)expr).QueryTree; } else { throw XPathException.Create(Res.Xp_BadQueryObject); } SortQuery sortQuery = query as SortQuery; if (sortQuery == null) { query = sortQuery = new SortQuery(query); } sortQuery.AddSort(evalExpr, comparer); } public override void AddSort(object expr, XmlSortOrder order, XmlCaseOrder caseOrder, string lang, XmlDataType dataType) { AddSort(expr, new XPathComparerHelper(order, caseOrder, lang, dataType)); } public override XPathExpression Clone() { return new CompiledXpathExpr(Query.Clone(query), expr, needContext); } public override void SetContext(XmlNamespaceManager nsManager) { XsltContext xsltContext = nsManager as XsltContext; if(xsltContext == null) { if(nsManager == null) { nsManager = new XmlNamespaceManager(new NameTable()); } xsltContext = new UndefinedXsltContext(nsManager); } query.SetXsltContext(xsltContext); needContext = false; } public override void SetContext(IXmlNamespaceResolver nsResolver) { XmlNamespaceManager nsManager = nsResolver as XmlNamespaceManager; if (nsManager == null) { if (nsResolver != null) { nsManager = new XmlNamespaceManager(new NameTable()); } } SetContext(nsManager); } public override XPathResultType ReturnType { get { return query.StaticType; } } private class UndefinedXsltContext : XsltContext { private XmlNamespaceManager nsManager; public UndefinedXsltContext(XmlNamespaceManager nsManager) : base(/*dummy*/false) { this.nsManager = nsManager; } //----- Namespace support ----- public override string DefaultNamespace { get { return string.Empty; } } public override string LookupNamespace(string prefix) { Debug.Assert(prefix != null); if(prefix.Length == 0) { return string.Empty; } string ns = this.nsManager.LookupNamespace(prefix); if(ns == null) { throw XPathException.Create(Res.XmlUndefinedAlias, prefix); } Debug.Assert(ns.Length != 0, "No XPath prefix can be mapped to 'null namespace'"); return ns; } //----- XsltContext support ----- public override IXsltContextVariable ResolveVariable(string prefix, string name) { throw XPathException.Create(Res.Xp_UndefinedXsltContext); } public override IXsltContextFunction ResolveFunction(string prefix, string name, XPathResultType[] ArgTypes) { throw XPathException.Create(Res.Xp_UndefinedXsltContext); } public override bool Whitespace { get{ return false; } } public override bool PreserveWhitespace(XPathNavigator node) { return false; } public override int CompareDocument (string baseUri, string nextbaseUri) { return string.CompareOrdinal(baseUri, nextbaseUri); } } } internal sealed class XPathComparerHelper : IComparer { private XmlSortOrder order; private XmlCaseOrder caseOrder; private CultureInfo cinfo; private XmlDataType dataType; public XPathComparerHelper(XmlSortOrder order, XmlCaseOrder caseOrder, string lang, XmlDataType dataType) { if (lang == null) { this.cinfo = System.Threading.Thread.CurrentThread.CurrentCulture; } else { try { this.cinfo = new CultureInfo(lang); } catch (System.ArgumentException) { throw; // Throwing an XsltException would be a breaking change } } if (order == XmlSortOrder.Descending) { if (caseOrder == XmlCaseOrder.LowerFirst) { caseOrder = XmlCaseOrder.UpperFirst; } else if (caseOrder == XmlCaseOrder.UpperFirst) { caseOrder = XmlCaseOrder.LowerFirst; } } this.order = order; this.caseOrder = caseOrder; this.dataType = dataType; } public Int32 Compare(object x, object y) { Int32 sortOrder = (this.order == XmlSortOrder.Ascending) ? 1 : -1; switch(this.dataType) { case XmlDataType.Text: string s1 = Convert.ToString(x, this.cinfo); string s2 = Convert.ToString(y, this.cinfo); Int32 result = string.Compare(s1, s2, (this.caseOrder == XmlCaseOrder.None) ? false : true, this.cinfo); if (result != 0 || this.caseOrder == XmlCaseOrder.None) return (sortOrder * result); // If we came this far, it means that strings s1 and s2 are // equal to each other when case is ignored. Now it's time to check // and see if they differ in case only and take into account the user // requested case order for sorting purposes. Int32 caseOrder = (this.caseOrder == XmlCaseOrder.LowerFirst) ? 1 : -1; result = string.Compare(s1, s2, false, this.cinfo); return (caseOrder * result); case XmlDataType.Number: double r1 = XmlConvert.ToXPathDouble(x); double r2 = XmlConvert.ToXPathDouble(y); // trying to return the result of (r1 - r2) casted down // to an Int32 can be dangerous. E.g 100.01 - 100.00 would result // erroneously in zero when casted down to Int32. if (r1 > r2) { return (1*sortOrder); } else if (r1 < r2) { return (-1*sortOrder); } else { if (r1 == r2) { return 0; } if (Double.IsNaN(r1)) { if (Double.IsNaN(r2)) { return 0; } //r2 is not NaN .NaN comes before any other number return (-1*sortOrder); } //r2 is NaN. So it should come after r1 return (1*sortOrder); } default: // dataType doesn't support any other value throw new InvalidOperationException( Res.GetString( Res.Xml_InvalidOperation ) ); } // switch } // Compare () } // class XPathComparerHelper } // 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.Collections; using System.Xml.Xsl; internal class CompiledXpathExpr : XPathExpression { Query query; string expr; bool needContext; internal CompiledXpathExpr(Query query, string expression, bool needContext) { this.query = query; this.expr = expression; this.needContext = needContext; } internal Query QueryTree { get { if (needContext) { throw XPathException.Create(Res.Xp_NoContext); } return query; } } public override string Expression { get { return expr; } } public virtual void CheckErrors() { Debug.Assert(query != null, "In case of error in XPath we create ErrorXPathExpression"); } public override void AddSort(object expr, IComparer comparer) { // sort makes sense only when we are dealing with a query that // returns a nodeset. Query evalExpr; if (expr is string) { evalExpr = new QueryBuilder().Build((string)expr, out needContext); // this will throw if expr is invalid } else if (expr is CompiledXpathExpr) { evalExpr = ((CompiledXpathExpr)expr).QueryTree; } else { throw XPathException.Create(Res.Xp_BadQueryObject); } SortQuery sortQuery = query as SortQuery; if (sortQuery == null) { query = sortQuery = new SortQuery(query); } sortQuery.AddSort(evalExpr, comparer); } public override void AddSort(object expr, XmlSortOrder order, XmlCaseOrder caseOrder, string lang, XmlDataType dataType) { AddSort(expr, new XPathComparerHelper(order, caseOrder, lang, dataType)); } public override XPathExpression Clone() { return new CompiledXpathExpr(Query.Clone(query), expr, needContext); } public override void SetContext(XmlNamespaceManager nsManager) { XsltContext xsltContext = nsManager as XsltContext; if(xsltContext == null) { if(nsManager == null) { nsManager = new XmlNamespaceManager(new NameTable()); } xsltContext = new UndefinedXsltContext(nsManager); } query.SetXsltContext(xsltContext); needContext = false; } public override void SetContext(IXmlNamespaceResolver nsResolver) { XmlNamespaceManager nsManager = nsResolver as XmlNamespaceManager; if (nsManager == null) { if (nsResolver != null) { nsManager = new XmlNamespaceManager(new NameTable()); } } SetContext(nsManager); } public override XPathResultType ReturnType { get { return query.StaticType; } } private class UndefinedXsltContext : XsltContext { private XmlNamespaceManager nsManager; public UndefinedXsltContext(XmlNamespaceManager nsManager) : base(/*dummy*/false) { this.nsManager = nsManager; } //----- Namespace support ----- public override string DefaultNamespace { get { return string.Empty; } } public override string LookupNamespace(string prefix) { Debug.Assert(prefix != null); if(prefix.Length == 0) { return string.Empty; } string ns = this.nsManager.LookupNamespace(prefix); if(ns == null) { throw XPathException.Create(Res.XmlUndefinedAlias, prefix); } Debug.Assert(ns.Length != 0, "No XPath prefix can be mapped to 'null namespace'"); return ns; } //----- XsltContext support ----- public override IXsltContextVariable ResolveVariable(string prefix, string name) { throw XPathException.Create(Res.Xp_UndefinedXsltContext); } public override IXsltContextFunction ResolveFunction(string prefix, string name, XPathResultType[] ArgTypes) { throw XPathException.Create(Res.Xp_UndefinedXsltContext); } public override bool Whitespace { get{ return false; } } public override bool PreserveWhitespace(XPathNavigator node) { return false; } public override int CompareDocument (string baseUri, string nextbaseUri) { return string.CompareOrdinal(baseUri, nextbaseUri); } } } internal sealed class XPathComparerHelper : IComparer { private XmlSortOrder order; private XmlCaseOrder caseOrder; private CultureInfo cinfo; private XmlDataType dataType; public XPathComparerHelper(XmlSortOrder order, XmlCaseOrder caseOrder, string lang, XmlDataType dataType) { if (lang == null) { this.cinfo = System.Threading.Thread.CurrentThread.CurrentCulture; } else { try { this.cinfo = new CultureInfo(lang); } catch (System.ArgumentException) { throw; // Throwing an XsltException would be a breaking change } } if (order == XmlSortOrder.Descending) { if (caseOrder == XmlCaseOrder.LowerFirst) { caseOrder = XmlCaseOrder.UpperFirst; } else if (caseOrder == XmlCaseOrder.UpperFirst) { caseOrder = XmlCaseOrder.LowerFirst; } } this.order = order; this.caseOrder = caseOrder; this.dataType = dataType; } public Int32 Compare(object x, object y) { Int32 sortOrder = (this.order == XmlSortOrder.Ascending) ? 1 : -1; switch(this.dataType) { case XmlDataType.Text: string s1 = Convert.ToString(x, this.cinfo); string s2 = Convert.ToString(y, this.cinfo); Int32 result = string.Compare(s1, s2, (this.caseOrder == XmlCaseOrder.None) ? false : true, this.cinfo); if (result != 0 || this.caseOrder == XmlCaseOrder.None) return (sortOrder * result); // If we came this far, it means that strings s1 and s2 are // equal to each other when case is ignored. Now it's time to check // and see if they differ in case only and take into account the user // requested case order for sorting purposes. Int32 caseOrder = (this.caseOrder == XmlCaseOrder.LowerFirst) ? 1 : -1; result = string.Compare(s1, s2, false, this.cinfo); return (caseOrder * result); case XmlDataType.Number: double r1 = XmlConvert.ToXPathDouble(x); double r2 = XmlConvert.ToXPathDouble(y); // trying to return the result of (r1 - r2) casted down // to an Int32 can be dangerous. E.g 100.01 - 100.00 would result // erroneously in zero when casted down to Int32. if (r1 > r2) { return (1*sortOrder); } else if (r1 < r2) { return (-1*sortOrder); } else { if (r1 == r2) { return 0; } if (Double.IsNaN(r1)) { if (Double.IsNaN(r2)) { return 0; } //r2 is not NaN .NaN comes before any other number return (-1*sortOrder); } //r2 is NaN. So it should come after r1 return (1*sortOrder); } default: // dataType doesn't support any other value throw new InvalidOperationException( Res.GetString( Res.Xml_InvalidOperation ) ); } // switch } // Compare () } // class XPathComparerHelper } // 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
- WebPartTracker.cs
- SingleConverter.cs
- NCryptSafeHandles.cs
- ApplicationException.cs
- DataGridDetailsPresenter.cs
- GeneralTransform.cs
- _FtpControlStream.cs
- XNodeNavigator.cs
- CoreSwitches.cs
- ToolStripDropDownButton.cs
- StringDictionary.cs
- safex509handles.cs
- SvcMapFileSerializer.cs
- keycontainerpermission.cs
- HtmlHead.cs
- PropertyDescriptorCollection.cs
- SafeTokenHandle.cs
- HtmlTableCell.cs
- TransactionOptions.cs
- Base64Encoder.cs
- VideoDrawing.cs
- CardSpaceSelector.cs
- ApplicationInterop.cs
- ConnectionStringsExpressionBuilder.cs
- SiteMapHierarchicalDataSourceView.cs
- ConfigurationPropertyAttribute.cs
- DecoderReplacementFallback.cs
- TheQuery.cs
- pingexception.cs
- SimpleWorkerRequest.cs
- InputBindingCollection.cs
- ThaiBuddhistCalendar.cs
- RtfFormatStack.cs
- WindowsScrollBar.cs
- AttachmentCollection.cs
- DefaultPrintController.cs
- AttributeEmitter.cs
- SqlMethods.cs
- IsolationInterop.cs
- ADConnectionHelper.cs
- SkewTransform.cs
- WmfPlaceableFileHeader.cs
- Int16.cs
- DataServiceQueryContinuation.cs
- PasswordRecovery.cs
- Sentence.cs
- ParallelLoopState.cs
- FlowDocumentReaderAutomationPeer.cs
- InputScopeConverter.cs
- UnitControl.cs
- UpdatePanelControlTrigger.cs
- MemberPath.cs
- StylusPointPropertyId.cs
- DrawListViewColumnHeaderEventArgs.cs
- SHA512Managed.cs
- SimpleWebHandlerParser.cs
- DisplayNameAttribute.cs
- ValueSerializer.cs
- Zone.cs
- SubtreeProcessor.cs
- XmlDataLoader.cs
- XmlResolver.cs
- ViewUtilities.cs
- odbcmetadatafactory.cs
- ProtectedConfigurationProviderCollection.cs
- MsmqDiagnostics.cs
- CounterSample.cs
- ContentElementCollection.cs
- TextPatternIdentifiers.cs
- PublisherMembershipCondition.cs
- EditBehavior.cs
- ToggleButton.cs
- IgnoreFileBuildProvider.cs
- AuthenticationModuleElement.cs
- FileRecordSequenceCompletedAsyncResult.cs
- EntityException.cs
- ExpandCollapseProviderWrapper.cs
- RoleManagerModule.cs
- GenericRootAutomationPeer.cs
- Vector3DAnimationBase.cs
- AutomationElementCollection.cs
- ListViewDeletedEventArgs.cs
- ConsumerConnectionPointCollection.cs
- Attributes.cs
- SystemResources.cs
- ServicePoint.cs
- Property.cs
- HeaderedItemsControl.cs
- ListViewDataItem.cs
- WebBrowser.cs
- SoapEnvelopeProcessingElement.cs
- SignatureToken.cs
- GridViewCommandEventArgs.cs
- StringUtil.cs
- DesignBindingPicker.cs
- SetterBaseCollection.cs
- Vector3DAnimation.cs
- FixedPage.cs
- ArraySegment.cs
- WebDescriptionAttribute.cs