public static ElementSchemaPointerPart ParseSchemaData(XPointerLexer lexer) { //Productions: //[1] ElementSchemeData ::= (NCName ChildSequence?) | ChildSequence //[2] ChildSequence ::= ('/' [1-9] [0-9]*)+ var xpathBuilder = new StringBuilder(); var part = new ElementSchemaPointerPart(); lexer.NextLexeme(); if (lexer.Kind == XPointerLexer.LexKind.NcName) { xpathBuilder.Append("id('"); xpathBuilder.Append(lexer.NcName); xpathBuilder.Append("')"); lexer.NextLexeme(); } var childSequenceLen = 0; while (lexer.Kind == XPointerLexer.LexKind.Slash) { lexer.NextLexeme(); if (lexer.Kind != XPointerLexer.LexKind.Number) { Debug.WriteLine(Resources.InvalidTokenInElementSchemeWhileNumberExpected); return(null); } if (lexer.Number == 0) { Debug.WriteLine(Resources.ZeroIndexInElementSchemechildSequence); return(null); } childSequenceLen++; xpathBuilder.Append("/*["); xpathBuilder.Append(lexer.Number); xpathBuilder.Append("]"); lexer.NextLexeme(); } if (lexer.Kind != XPointerLexer.LexKind.RrBracket) { throw new XPointerSyntaxException(Resources.InvalidTokenInElementSchemeWhileClosingRoundBracketExpected); } if (xpathBuilder.Length == 0 && childSequenceLen == 0) { Debug.WriteLine(Resources.EmptyElementSchemeXPointer); return(null); } part.XPath = xpathBuilder.ToString(); return(part); }
public static Pointer ParseXPointer(string xpointer) { var lexer = new XPointerLexer(xpointer); lexer.NextLexeme(); if (lexer.Kind == XPointerLexer.LexKind.NcName && !lexer.CanBeSchemaName) { //Shorthand pointer Pointer ptr = new ShorthandPointer(lexer.NcName); lexer.NextLexeme(); if (lexer.Kind != XPointerLexer.LexKind.Eof) { throw new XPointerSyntaxException(Resources.InvalidTokenAfterShorthandPointer); } return(ptr); } //SchemaBased pointer IList <PointerPart> parts = new List <PointerPart>(); while (lexer.Kind != XPointerLexer.LexKind.Eof) { if ((lexer.Kind == XPointerLexer.LexKind.NcName || lexer.Kind == XPointerLexer.LexKind.QName) && lexer.CanBeSchemaName) { var schemaType = GetSchema(lexer, parts); //Move to '(' lexer.NextLexeme(); switch (schemaType) { case XPointerSchema.SchemaType.Element: var elemPart = ElementSchemaPointerPart.ParseSchemaData(lexer); if (elemPart != null) { parts.Add(elemPart); } break; case XPointerSchema.SchemaType.Xmlns: var xmlnsPart = XmlnsSchemaPointerPart.ParseSchemaData(lexer); if (xmlnsPart != null) { parts.Add(xmlnsPart); } break; case XPointerSchema.SchemaType.XPath1: var xpath1Part = XPath1SchemaPointerPart.ParseSchemaData(lexer); if (xpath1Part != null) { parts.Add(xpath1Part); } break; case XPointerSchema.SchemaType.XPointer: var xpointerPart = XPointerSchemaPointerPart.ParseSchemaData(lexer); if (xpointerPart != null) { parts.Add(xpointerPart); } break; default: //Unknown scheme lexer.ParseEscapedData(); break; } //Skip ')' lexer.NextLexeme(); //Skip possible whitespace if (lexer.Kind == XPointerLexer.LexKind.Space) { lexer.NextLexeme(); } } else { throw new XPointerSyntaxException(Resources.InvalidToken); } } return(new SchemaBasedPointer(parts, xpointer)); }