Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Common / EntitySql / CqlParserHelpers.cs / 1305376 / CqlParserHelpers.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- namespace System.Data.Common.EntitySql { using System; using System.Collections.Generic; using System.IO; using System.Globalization; using System.Data.Common.EntitySql.AST; ////// Represents the Cql Parser engine. Also, implements helpers and util routines. /// internal sealed partial class CqlParser { private Node _parsedTree; private CqlLexer _lexer; private string _query; private ParserOptions _parserOptions; private const string _internalYaccSyntaxErrorMessage = "syntax error"; ////// Contains inclusive count of method expressions. /// private uint _methodExprCounter; private Stack_methodExprCounterStack; private string _version = YYMAJOR.ToString(NumberFormatInfo.InvariantInfo) + '.' + YYMINOR.ToString(NumberFormatInfo.InvariantInfo); internal CqlParser( ParserOptions parserOptions, bool debug ) { // The common practice is to make the null check at the public surface, // however this method is a convergence zone from multiple public entry points and it makes sense to // check for null once, here. EntityUtil.CheckArgumentNull(parserOptions, "parserOptions"); _parserOptions = parserOptions; yydebug = debug; } /// /// Main entry point for parsing cql. /// /// query text ///Thrown when Syntatic rules are violated and the query cannot be accepted ///Abstract Syntax Tree internal Node Parse(string query) { // The common practice is to make the null check at the public surface, // however this method is a convergence zone from multiple public entry points and it makes sense to // check for null once, here. EntityUtil.CheckArgumentNull(query, "query"); if (String.IsNullOrEmpty(query) || query.Trim().Length == 0) { throw EntityUtil.Argument(System.Data.Entity.Strings.InvalidEmptyQueryTextArgument); } _query = query; _parsedTree = null; _parserOptions = _parserOptions.MakeReadOnly(); _methodExprCounter = 0; _methodExprCounterStack = new Stack(); internalParseEntryPoint(); return _parsedTree; } /// /// Returns query string /// internal string Query { get { return _query; } } #if EXTRA_ENTITYSQL_PARSER_DEBUGGING ////// Enables/Disables yacc debugging. /// internal bool EnableDebug { get { return yydebug; } set { yydebug = value; } } #endif ////// Returns ParserOptions used /// ///Once parse has been invoked, ParserOptions are frozen and cannot be changed. otherwise a EntityException exception will be thrown internal ParserOptions ParserOptions { get { return _parserOptions; } } ////// Internal entry point /// private void internalParseEntryPoint() { _lexer = new CqlLexer(Query, ParserOptions); #if EXTRA_ENTITYSQL_PARSER_DEBUGGING CqlLexer.Token tk = lexer.yylex(); while (null != tk) { Console.WriteLine("{0} := {1}", tk.TokenId, lexer.yytext()); tk = lexer.yylex(); } #endif yyparse(); } // // Conversion/Cast/Helpers // private static Node AstNode(object o) { return ((Node)o); } private static int AstNodePos( object o ) { return ((Node)o).ErrCtx.InputPosition; } private static CqlLexer.TerminalToken Terminal( object o ) { return ((CqlLexer.TerminalToken)o); } private static int TerminalPos( object o ) { return ((CqlLexer.TerminalToken)o).IPos; } private static NodeListToNodeList (object o) where T : Node { return ((NodeList )o); } private short yylex() { CqlLexer.Token token = null; token = _lexer.yylex(); if (null == token) { return 0; } _lexer.AdvanceIPos(); yylval = token.Value; return token.TokenId; } private void yyerror_stackoverflow() { yyerror(System.Data.Entity.Strings.StackOverflowInParser); } private void yyerror( string s ) { if (s.Equals(_internalYaccSyntaxErrorMessage, StringComparison.Ordinal)) { int errorPosition = _lexer.IPos; string syntaxContextInfo = null; string term = _lexer.YYText; if (!String.IsNullOrEmpty(term)) { syntaxContextInfo = System.Data.Entity.Strings.LocalizedTerm; ErrorContext errCtx = null; Node astNode = yylval as Node; if (null != astNode && (null != astNode.ErrCtx) && (!String.IsNullOrEmpty(astNode.ErrCtx.ErrorContextInfo))) { errCtx = astNode.ErrCtx; errorPosition = Math.Min(errorPosition, errorPosition - term.Length); } if ((yylval is CqlLexer.TerminalToken) && CqlLexer.IsReservedKeyword(term) && !(astNode is Identifier)) { syntaxContextInfo = System.Data.Entity.Strings.LocalizedKeyword; term = term.ToUpperInvariant(); errorPosition = Math.Min(errorPosition, errorPosition - term.Length); } else if (null != errCtx) { syntaxContextInfo = EntityRes.GetString(errCtx.ErrorContextInfo); } syntaxContextInfo = String.Format(CultureInfo.CurrentCulture, "{0} '{1}'", syntaxContextInfo, term); } throw EntityUtil.EntitySqlError(_query, System.Data.Entity.Strings.GenericSyntaxError, errorPosition, syntaxContextInfo, false /* loadErrorContextInfoFromResource */); } throw EntityUtil.EntitySqlError(_query, s, _lexer.IPos); } // // Error tracking helpers // private void SetErrCtx(Node astExpr, CqlLexer.TerminalToken tokenValue, string info) { SetErrCtx(astExpr, tokenValue.IPos, info); } private void SetErrCtx(Node astExpr, int inputPos, string info) { astExpr.ErrCtx.InputPosition = inputPos; astExpr.ErrCtx.ErrorContextInfo = info; astExpr.ErrCtx.CommandText = _query; } private void StartMethodExprCounting() { // Save the current counter value. _methodExprCounterStack.Push(_methodExprCounter); // Reset the counter for the current level. _methodExprCounter = 0; } private void IncrementMethodExprCount() { ++_methodExprCounter; } private uint EndMethodExprCounting() { // Save number of method expressions on the current level. uint count = _methodExprCounter; // Restore upper level counter and adjust it with the number of method expressions on the current level. _methodExprCounter += _methodExprCounterStack.Pop(); return count; } } } // 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
- BooleanConverter.cs
- _SpnDictionary.cs
- ListViewItemMouseHoverEvent.cs
- DataColumnChangeEvent.cs
- EndOfStreamException.cs
- QilInvokeLateBound.cs
- SerializerDescriptor.cs
- OutputChannelBinder.cs
- ComponentSerializationService.cs
- Utils.cs
- RequestTimeoutManager.cs
- InstanceNotFoundException.cs
- TriggerBase.cs
- CounterCreationData.cs
- DirectionalLight.cs
- WebPartVerb.cs
- RepeaterItemEventArgs.cs
- SolidColorBrush.cs
- SQLInt64Storage.cs
- PackWebRequest.cs
- KnownBoxes.cs
- ServicePointManager.cs
- formatter.cs
- ExceptionUtil.cs
- EncryptedKey.cs
- DataRecordInfo.cs
- FlowDocumentReaderAutomationPeer.cs
- SymDocumentType.cs
- HttpRawResponse.cs
- SystemEvents.cs
- LogicalExpr.cs
- DataGridViewHitTestInfo.cs
- MetadataFile.cs
- XmlSchemaException.cs
- ExpressionConverter.cs
- UrlMappingsModule.cs
- GenerateHelper.cs
- UiaCoreProviderApi.cs
- BitmapEncoder.cs
- ADConnectionHelper.cs
- WorkflowOperationAsyncResult.cs
- InboundActivityHelper.cs
- PropertyConverter.cs
- RegexCharClass.cs
- DeferredTextReference.cs
- BufferedStream2.cs
- HtmlContainerControl.cs
- InfoCardTraceRecord.cs
- NameScopePropertyAttribute.cs
- WSDualHttpBindingElement.cs
- NameValueConfigurationElement.cs
- SizeConverter.cs
- TraceSection.cs
- ListenerAdaptersInstallComponent.cs
- MarkupObject.cs
- InkCanvasFeedbackAdorner.cs
- MultilineStringEditor.cs
- XmlWriter.cs
- ProfileParameter.cs
- AssemblyInfo.cs
- EditorBrowsableAttribute.cs
- OutputCacheModule.cs
- SingleObjectCollection.cs
- DataIdProcessor.cs
- DoubleLink.cs
- MaskInputRejectedEventArgs.cs
- SecurityManager.cs
- LicenseException.cs
- RsaSecurityTokenAuthenticator.cs
- adornercollection.cs
- ApplicationId.cs
- TimelineClockCollection.cs
- EmptyCollection.cs
- SamlSubjectStatement.cs
- ExpressionBuilderContext.cs
- EmptyStringExpandableObjectConverter.cs
- LocalizableAttribute.cs
- DataRowComparer.cs
- InputProcessorProfilesLoader.cs
- LockCookie.cs
- PageCodeDomTreeGenerator.cs
- PageCodeDomTreeGenerator.cs
- Visual3DCollection.cs
- Currency.cs
- safex509handles.cs
- ProfileBuildProvider.cs
- StrongNameMembershipCondition.cs
- PanelDesigner.cs
- NativeActivityContext.cs
- MemberNameValidator.cs
- WebPartDescriptionCollection.cs
- CheckBoxAutomationPeer.cs
- Directory.cs
- InputScopeManager.cs
- TextDecorationCollection.cs
- RoutingService.cs
- EntityConnectionStringBuilderItem.cs
- EntityTypeEmitter.cs
- ProviderCollection.cs
- EventToken.cs