Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / Xslt / XPathPatternParser.cs / 1305376 / XPathPatternParser.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System.Collections.Generic; using System.Diagnostics; using System.Xml; using System.Xml.Xsl.Qil; using System.Xml.Xsl.XPath; namespace System.Xml.Xsl.Xslt { using XPathParser = XPathParser; using XPathNodeType = System.Xml.XPath.XPathNodeType; using Res = System.Xml.Utils.Res; internal class XPathPatternParser { public interface IPatternBuilder : IXPathBuilder { IXPathBuilder GetPredicateBuilder(QilNode context); } XPathScanner scanner; IPatternBuilder ptrnBuilder; XPathParser predicateParser = new XPathParser(); public QilNode Parse(XPathScanner scanner, IPatternBuilder ptrnBuilder) { Debug.Assert(this.scanner == null && this.ptrnBuilder == null); Debug.Assert(scanner != null && ptrnBuilder != null); QilNode result = null; ptrnBuilder.StartBuild(); try { this.scanner = scanner; this.ptrnBuilder = ptrnBuilder; result = this.ParsePattern(); this.scanner.CheckToken(LexKind.Eof); } finally { result = ptrnBuilder.EndBuild(result); #if DEBUG this.ptrnBuilder = null; this.scanner = null; #endif } return result; } /* * Pattern ::= LocationPathPattern ('|' LocationPathPattern)* */ private QilNode ParsePattern() { QilNode opnd = ParseLocationPathPattern(); while (scanner.Kind == LexKind.Union) { scanner.NextLex(); opnd = ptrnBuilder.Operator(XPathOperator.Union, opnd, ParseLocationPathPattern()); } return opnd; } /* * LocationPathPattern ::= '/' RelativePathPattern? | '//'? RelativePathPattern | IdKeyPattern (('/' | '//') RelativePathPattern)? */ private QilNode ParseLocationPathPattern() { QilNode opnd; switch (scanner.Kind) { case LexKind.Slash : scanner.NextLex(); opnd = ptrnBuilder.Axis(XPathAxis.Root, XPathNodeType.All, null, null); if (XPathParser.IsStep(scanner.Kind)) { opnd = ptrnBuilder.JoinStep(opnd, ParseRelativePathPattern()); } return opnd; case LexKind.SlashSlash : scanner.NextLex(); return ptrnBuilder.JoinStep( ptrnBuilder.Axis(XPathAxis.Root, XPathNodeType.All, null, null), ptrnBuilder.JoinStep( ptrnBuilder.Axis(XPathAxis.DescendantOrSelf, XPathNodeType.All, null, null), ParseRelativePathPattern() ) ); case LexKind.Name : if (scanner.CanBeFunction && scanner.Prefix.Length == 0 && (scanner.Name == "id" || scanner.Name == "key")) { opnd = ParseIdKeyPattern(); switch (scanner.Kind) { case LexKind.Slash : scanner.NextLex(); opnd = ptrnBuilder.JoinStep(opnd, ParseRelativePathPattern()); break; case LexKind.SlashSlash : scanner.NextLex(); opnd = ptrnBuilder.JoinStep(opnd, ptrnBuilder.JoinStep( ptrnBuilder.Axis(XPathAxis.DescendantOrSelf, XPathNodeType.All, null, null), ParseRelativePathPattern() ) ); break; } return opnd; } break; } opnd = ParseRelativePathPattern(); return opnd; } /* * IdKeyPattern ::= 'id' '(' Literal ')' | 'key' '(' Literal ',' Literal ')' */ private QilNode ParseIdKeyPattern() { Debug.Assert(scanner.CanBeFunction); Debug.Assert(scanner.Prefix.Length == 0); Debug.Assert(scanner.Name == "id" || scanner.Name == "key"); List args = new List (2); if (scanner.Name == "id") { scanner.NextLex(); scanner.PassToken(LexKind.LParens); scanner.CheckToken(LexKind.String); args.Add(ptrnBuilder.String(scanner.StringValue)); scanner.NextLex(); scanner.PassToken(LexKind.RParens); return ptrnBuilder.Function("", "id", args); } else { scanner.NextLex(); scanner.PassToken(LexKind.LParens); scanner.CheckToken(LexKind.String); args.Add(ptrnBuilder.String(scanner.StringValue)); scanner.NextLex(); scanner.PassToken(LexKind.Comma); scanner.CheckToken(LexKind.String); args.Add(ptrnBuilder.String(scanner.StringValue)); scanner.NextLex(); scanner.PassToken(LexKind.RParens); return ptrnBuilder.Function("", "key", args); } } /* * RelativePathPattern ::= StepPattern (('/' | '//') StepPattern)* */ private QilNode ParseRelativePathPattern() { QilNode opnd = ParseStepPattern(); if (scanner.Kind == LexKind.Slash) { scanner.NextLex(); opnd = ptrnBuilder.JoinStep(opnd, ParseRelativePathPattern()); } else if (scanner.Kind == LexKind.SlashSlash) { scanner.NextLex(); opnd = ptrnBuilder.JoinStep(opnd, ptrnBuilder.JoinStep( ptrnBuilder.Axis(XPathAxis.DescendantOrSelf, XPathNodeType.All, null, null), ParseRelativePathPattern() ) ); } return opnd; } /* * StepPattern ::= ChildOrAttributeAxisSpecifier NodeTest Predicate* * ChildOrAttributeAxisSpecifier ::= @ ? | ('child' | 'attribute') '::' */ private QilNode ParseStepPattern() { QilNode opnd; XPathAxis axis; switch (scanner.Kind) { case LexKind.Dot: case LexKind.DotDot: throw scanner.CreateException(Res.XPath_InvalidAxisInPattern); case LexKind.At: axis = XPathAxis.Attribute; scanner.NextLex(); break; case LexKind.Axis: axis = scanner.Axis; if (axis != XPathAxis.Child && axis != XPathAxis.Attribute) { throw scanner.CreateException(Res.XPath_InvalidAxisInPattern); } scanner.NextLex(); // Skip '::' scanner.NextLex(); break; case LexKind.Name: case LexKind.Star: // NodeTest must start with Name or '*' axis = XPathAxis.Child; break; default: throw scanner.CreateException(Res.XPath_UnexpectedToken, scanner.RawValue); } XPathNodeType nodeType; string nodePrefix, nodeName; XPathParser.InternalParseNodeTest(scanner, axis, out nodeType, out nodePrefix, out nodeName); opnd = ptrnBuilder.Axis(axis, nodeType, nodePrefix, nodeName); while (scanner.Kind == LexKind.LBracket) { opnd = ptrnBuilder.Predicate(opnd, ParsePredicate(opnd), /*reverseStep:*/false); } return opnd; } /* * Predicate ::= '[' Expr ']' */ private QilNode ParsePredicate(QilNode context) { Debug.Assert(scanner.Kind == LexKind.LBracket); scanner.NextLex(); QilNode result = predicateParser.Parse(scanner, ptrnBuilder.GetPredicateBuilder(context), LexKind.RBracket); Debug.Assert(scanner.Kind == LexKind.RBracket); scanner.NextLex(); return result; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System.Collections.Generic; using System.Diagnostics; using System.Xml; using System.Xml.Xsl.Qil; using System.Xml.Xsl.XPath; namespace System.Xml.Xsl.Xslt { using XPathParser = XPathParser; using XPathNodeType = System.Xml.XPath.XPathNodeType; using Res = System.Xml.Utils.Res; internal class XPathPatternParser { public interface IPatternBuilder : IXPathBuilder { IXPathBuilder GetPredicateBuilder(QilNode context); } XPathScanner scanner; IPatternBuilder ptrnBuilder; XPathParser predicateParser = new XPathParser(); public QilNode Parse(XPathScanner scanner, IPatternBuilder ptrnBuilder) { Debug.Assert(this.scanner == null && this.ptrnBuilder == null); Debug.Assert(scanner != null && ptrnBuilder != null); QilNode result = null; ptrnBuilder.StartBuild(); try { this.scanner = scanner; this.ptrnBuilder = ptrnBuilder; result = this.ParsePattern(); this.scanner.CheckToken(LexKind.Eof); } finally { result = ptrnBuilder.EndBuild(result); #if DEBUG this.ptrnBuilder = null; this.scanner = null; #endif } return result; } /* * Pattern ::= LocationPathPattern ('|' LocationPathPattern)* */ private QilNode ParsePattern() { QilNode opnd = ParseLocationPathPattern(); while (scanner.Kind == LexKind.Union) { scanner.NextLex(); opnd = ptrnBuilder.Operator(XPathOperator.Union, opnd, ParseLocationPathPattern()); } return opnd; } /* * LocationPathPattern ::= '/' RelativePathPattern? | '//'? RelativePathPattern | IdKeyPattern (('/' | '//') RelativePathPattern)? */ private QilNode ParseLocationPathPattern() { QilNode opnd; switch (scanner.Kind) { case LexKind.Slash : scanner.NextLex(); opnd = ptrnBuilder.Axis(XPathAxis.Root, XPathNodeType.All, null, null); if (XPathParser.IsStep(scanner.Kind)) { opnd = ptrnBuilder.JoinStep(opnd, ParseRelativePathPattern()); } return opnd; case LexKind.SlashSlash : scanner.NextLex(); return ptrnBuilder.JoinStep( ptrnBuilder.Axis(XPathAxis.Root, XPathNodeType.All, null, null), ptrnBuilder.JoinStep( ptrnBuilder.Axis(XPathAxis.DescendantOrSelf, XPathNodeType.All, null, null), ParseRelativePathPattern() ) ); case LexKind.Name : if (scanner.CanBeFunction && scanner.Prefix.Length == 0 && (scanner.Name == "id" || scanner.Name == "key")) { opnd = ParseIdKeyPattern(); switch (scanner.Kind) { case LexKind.Slash : scanner.NextLex(); opnd = ptrnBuilder.JoinStep(opnd, ParseRelativePathPattern()); break; case LexKind.SlashSlash : scanner.NextLex(); opnd = ptrnBuilder.JoinStep(opnd, ptrnBuilder.JoinStep( ptrnBuilder.Axis(XPathAxis.DescendantOrSelf, XPathNodeType.All, null, null), ParseRelativePathPattern() ) ); break; } return opnd; } break; } opnd = ParseRelativePathPattern(); return opnd; } /* * IdKeyPattern ::= 'id' '(' Literal ')' | 'key' '(' Literal ',' Literal ')' */ private QilNode ParseIdKeyPattern() { Debug.Assert(scanner.CanBeFunction); Debug.Assert(scanner.Prefix.Length == 0); Debug.Assert(scanner.Name == "id" || scanner.Name == "key"); List args = new List (2); if (scanner.Name == "id") { scanner.NextLex(); scanner.PassToken(LexKind.LParens); scanner.CheckToken(LexKind.String); args.Add(ptrnBuilder.String(scanner.StringValue)); scanner.NextLex(); scanner.PassToken(LexKind.RParens); return ptrnBuilder.Function("", "id", args); } else { scanner.NextLex(); scanner.PassToken(LexKind.LParens); scanner.CheckToken(LexKind.String); args.Add(ptrnBuilder.String(scanner.StringValue)); scanner.NextLex(); scanner.PassToken(LexKind.Comma); scanner.CheckToken(LexKind.String); args.Add(ptrnBuilder.String(scanner.StringValue)); scanner.NextLex(); scanner.PassToken(LexKind.RParens); return ptrnBuilder.Function("", "key", args); } } /* * RelativePathPattern ::= StepPattern (('/' | '//') StepPattern)* */ private QilNode ParseRelativePathPattern() { QilNode opnd = ParseStepPattern(); if (scanner.Kind == LexKind.Slash) { scanner.NextLex(); opnd = ptrnBuilder.JoinStep(opnd, ParseRelativePathPattern()); } else if (scanner.Kind == LexKind.SlashSlash) { scanner.NextLex(); opnd = ptrnBuilder.JoinStep(opnd, ptrnBuilder.JoinStep( ptrnBuilder.Axis(XPathAxis.DescendantOrSelf, XPathNodeType.All, null, null), ParseRelativePathPattern() ) ); } return opnd; } /* * StepPattern ::= ChildOrAttributeAxisSpecifier NodeTest Predicate* * ChildOrAttributeAxisSpecifier ::= @ ? | ('child' | 'attribute') '::' */ private QilNode ParseStepPattern() { QilNode opnd; XPathAxis axis; switch (scanner.Kind) { case LexKind.Dot: case LexKind.DotDot: throw scanner.CreateException(Res.XPath_InvalidAxisInPattern); case LexKind.At: axis = XPathAxis.Attribute; scanner.NextLex(); break; case LexKind.Axis: axis = scanner.Axis; if (axis != XPathAxis.Child && axis != XPathAxis.Attribute) { throw scanner.CreateException(Res.XPath_InvalidAxisInPattern); } scanner.NextLex(); // Skip '::' scanner.NextLex(); break; case LexKind.Name: case LexKind.Star: // NodeTest must start with Name or '*' axis = XPathAxis.Child; break; default: throw scanner.CreateException(Res.XPath_UnexpectedToken, scanner.RawValue); } XPathNodeType nodeType; string nodePrefix, nodeName; XPathParser.InternalParseNodeTest(scanner, axis, out nodeType, out nodePrefix, out nodeName); opnd = ptrnBuilder.Axis(axis, nodeType, nodePrefix, nodeName); while (scanner.Kind == LexKind.LBracket) { opnd = ptrnBuilder.Predicate(opnd, ParsePredicate(opnd), /*reverseStep:*/false); } return opnd; } /* * Predicate ::= '[' Expr ']' */ private QilNode ParsePredicate(QilNode context) { Debug.Assert(scanner.Kind == LexKind.LBracket); scanner.NextLex(); QilNode result = predicateParser.Parse(scanner, ptrnBuilder.GetPredicateBuilder(context), LexKind.RBracket); Debug.Assert(scanner.Kind == LexKind.RBracket); scanner.NextLex(); return result; } } } // 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
- TextProviderWrapper.cs
- RichTextBoxConstants.cs
- Focus.cs
- NameTable.cs
- RtType.cs
- NavigationService.cs
- PointAnimationBase.cs
- FixedSOMImage.cs
- SqlMethodAttribute.cs
- SymbolType.cs
- SQLSingleStorage.cs
- RewritingValidator.cs
- MsmqAppDomainProtocolHandler.cs
- ClientProxyGenerator.cs
- GridViewUpdatedEventArgs.cs
- DataGrid.cs
- OfTypeExpression.cs
- DoubleAnimation.cs
- ToolboxItemCollection.cs
- UInt64.cs
- PingOptions.cs
- SettingsPropertyNotFoundException.cs
- TableSectionStyle.cs
- ButtonBaseAdapter.cs
- HybridDictionary.cs
- SQLByte.cs
- UriScheme.cs
- ActivityBindForm.cs
- ModelItemKeyValuePair.cs
- CapabilitiesUse.cs
- ViewStateException.cs
- IDQuery.cs
- HtmlElementCollection.cs
- CapabilitiesState.cs
- URLIdentityPermission.cs
- ScrollChrome.cs
- AppDomain.cs
- AdornedElementPlaceholder.cs
- SimpleTextLine.cs
- XmlDataSourceNodeDescriptor.cs
- TriggerCollection.cs
- XpsFilter.cs
- Converter.cs
- DebugView.cs
- WebPartAuthorizationEventArgs.cs
- Gdiplus.cs
- LogManagementAsyncResult.cs
- recordstatefactory.cs
- PropertyRef.cs
- XmlAutoDetectWriter.cs
- BindableTemplateBuilder.cs
- ApplicationId.cs
- XsdDateTime.cs
- ProxyHwnd.cs
- Int32Animation.cs
- CompilationLock.cs
- DataGridViewSelectedCellsAccessibleObject.cs
- AuthorizationSection.cs
- SQLRoleProvider.cs
- EventLogConfiguration.cs
- CompositeControl.cs
- ComNativeDescriptor.cs
- EventListener.cs
- AssemblyAttributesGoHere.cs
- TimeManager.cs
- ScrollViewer.cs
- unsafenativemethodstextservices.cs
- AccessKeyManager.cs
- MethodCallExpression.cs
- QuaternionAnimation.cs
- RsaEndpointIdentity.cs
- DataGridViewSortCompareEventArgs.cs
- LinqDataSourceInsertEventArgs.cs
- FragmentQueryProcessor.cs
- GlobalizationAssembly.cs
- JsonGlobals.cs
- Page.cs
- XmlSchemaSubstitutionGroup.cs
- OleDbErrorCollection.cs
- Knowncolors.cs
- TextParagraph.cs
- SqlParameterCollection.cs
- Source.cs
- EventlogProvider.cs
- NameValuePair.cs
- TextMetrics.cs
- ResizeBehavior.cs
- ObjectDataSource.cs
- FormViewInsertedEventArgs.cs
- CompilationLock.cs
- SQLDouble.cs
- WSFederationHttpBinding.cs
- GenericEnumerator.cs
- RequiredAttributeAttribute.cs
- RoleGroup.cs
- InputLangChangeRequestEvent.cs
- TransformGroup.cs
- ButtonBaseAdapter.cs
- InvalidComObjectException.cs
- OpenTypeCommon.cs