public static XmlnsSchemaPointerPart ParseSchemaData(XPointerLexer lexer)
{
//[1] XmlnsSchemeData ::= NCName S? '=' S? EscapedNamespaceName
//[2] EscapedNamespaceName ::= EscapedData*
//Read prefix as NCName
lexer.NextLexeme();
if (lexer.Kind != XPointerLexer.LexKind.NCName)
{
Debug.WriteLine(Properties.Resources.InvalidTokenInXmlnsSchemeWhileNCNameExpected);
return null;
}
string prefix = lexer.NCName;
lexer.SkipWhiteSpace();
lexer.NextLexeme();
if (lexer.Kind != XPointerLexer.LexKind.Eq)
{
Debug.WriteLine(Properties.Resources.InvalidTokenInXmlnsSchemeWhileEqualsSignExpected);
return null;
}
lexer.SkipWhiteSpace();
string nsURI;
try
{
nsURI = lexer.ParseEscapedData();
}
catch (Exception e)
{
throw new XPointerSyntaxException(String.Format(CultureInfo.CurrentCulture, Properties.Resources.SyntaxErrorInXmlnsSchemeData, e.Message));
}
return new XmlnsSchemaPointerPart(prefix, nsURI);
}
/// <summary>
/// Parses element() based pointer part and builds instance of <c>ElementSchemaPointerPart</c> class.
/// </summary>
/// <param name="lexer">Lexical analizer.</param>
/// <returns>Newly created <c>ElementSchemaPointerPart</c> object.</returns>
public static ElementSchemaPointerPart ParseSchemaData(XPointerLexer lexer)
{
//Productions:
//[1] ElementSchemeData ::= (NCName ChildSequence?) | ChildSequence
//[2] ChildSequence ::= ('/' [1-9] [0-9]*)+
StringBuilder xpathBuilder = new StringBuilder();
ElementSchemaPointerPart part = new ElementSchemaPointerPart();
lexer.NextLexeme();
if (lexer.Kind == XPointerLexer.LexKind.NCName)
{
xpathBuilder.Append("id('");
xpathBuilder.Append(lexer.NCName);
xpathBuilder.Append("')");
lexer.NextLexeme();
}
int childSequenceLen = 0;
while (lexer.Kind == XPointerLexer.LexKind.Slash)
{
lexer.NextLexeme();
if (lexer.Kind != XPointerLexer.LexKind.Number)
{
Debug.WriteLine(Properties.Resources.InvalidTokenInElementSchemeWhileNumberExpected);
return null;
}
if (lexer.Number == 0)
{
Debug.WriteLine(Properties.Resources.ZeroIndexInElementSchemechildSequence);
return null;
}
childSequenceLen++;
xpathBuilder.Append("/*[");
xpathBuilder.Append(lexer.Number);
xpathBuilder.Append("]");
lexer.NextLexeme();
}
if (lexer.Kind != XPointerLexer.LexKind.RRBracket)
{
throw new XPointerSyntaxException(Properties.Resources.InvalidTokenInElementSchemeWhileClosingRoundBracketExpected);
}
if (xpathBuilder.Length == 0 && childSequenceLen == 0)
{
Debug.WriteLine(Properties.Resources.EmptyElementSchemeXPointer);
return null;
}
part.XPath = xpathBuilder.ToString();
return part;
}