/// <summary>
/// Parse a sequence of queries.
/// Eeach query in the sequence must end with a ';'.
/// Output also the individual query strings.
/// </summary>
public static List <Expression> ParseQueries(string query_sequence, out List <string> query_strings)
{
try
{
var input = new Antlr.Runtime.ANTLRStringStream(query_sequence);
var lexer = new queryLexer(input);
var tokens = new Antlr.Runtime.CommonTokenStream(lexer);
var parser = new queryParser(tokens);
var res = parser.Queries();
query_strings = res.Item2;
return(res.Item1);
}
catch (Antlr.Runtime.MismatchedTokenException e)
{
string tok = (e.Token != null ? "'" + e.Token.Text + "'" : (e.Character >= 0 ? StringUtility.Escape((char)e.Character) : ""));
string msg = "unexpected token " + tok;
if (tok != "" && 0 <= e.Expecting && e.Expecting < queryParser.tokenNames.Length)
{
msg += string.Format(" expecting {0}", queryParser.tokenNames[e.Expecting]);
}
throw new QueryParseException(e.Line, e.CharPositionInLine + 1, msg);
}
catch (Antlr.Runtime.FailedPredicateException e)
{
string msg = string.Format("unexpected '{0}' failed {1}", (e.Token != null ? e.Token.Text : ((char)e.Character).ToString()), e.PredicateText);
throw new QueryParseException(e.Line, e.CharPositionInLine + 1, msg);
}
catch (Antlr.Runtime.NoViableAltException e)
{
string msg = string.Format("unexpected '{0}' no alternatives", (e.Token != null ? e.Token.Text : ((char)e.Character).ToString()));
throw new QueryParseException(e.Line, e.CharPositionInLine + 1, msg);
}
catch (Antlr.Runtime.RecognitionException e)
{
string msg = string.Format("unexpected '{0}'", (e.Token != null ? e.Token.Text : ((char)e.Character).ToString()));
throw new QueryParseException(e.Line, e.CharPositionInLine + 1, msg);
}
catch (QueryParseException e)
{
throw e;
}
catch (Exception e)
{
throw new QueryParseException(1, 1, e.Message);
}
}
/// <summary>
/// Parse a single query expression.
/// </summary>
public static Expression ParseQuery(string query)
{
try
{
var input = new Antlr.Runtime.ANTLRStringStream(query);
var lexer = new queryLexer(input);
var tokens = new Antlr.Runtime.CommonTokenStream(lexer);
var parser = new queryParser(tokens);
var res = parser.Query();
return res;
}
catch (Antlr.Runtime.MismatchedTokenException e)
{
string tok = (e.Token != null ? "'" + e.Token.Text + "'" : (e.Character >= 0 ? Microsoft.Automata.StringUtility.Escape((char)e.Character) : ""));
string msg = "unexpected token " + tok;
if (tok !="" && 0 <= e.Expecting && e.Expecting < queryParser.tokenNames.Length)
msg += string.Format(" expecting {0}", queryParser.tokenNames[e.Expecting]);
throw new QueryParseException(e.Line, e.CharPositionInLine + 1, msg);
}
catch (Antlr.Runtime.FailedPredicateException e)
{
string msg = string.Format("unexpected '{0}' failed {1}", (e.Token != null ? e.Token.Text : ((char)e.Character).ToString()), e.PredicateText);
throw new QueryParseException(e.Line, e.CharPositionInLine + 1, msg);
}
catch (Antlr.Runtime.NoViableAltException e)
{
string msg = string.Format("unexpected '{0}' no alternatives", (e.Token != null ? e.Token.Text : ((char)e.Character).ToString()));
throw new QueryParseException(e.Line, e.CharPositionInLine + 1, msg);
}
catch (Antlr.Runtime.RecognitionException e)
{
string msg = string.Format("unexpected '{0}'", (e.Token != null ? e.Token.Text : ((char)e.Character).ToString()));
throw new QueryParseException(e.Line, e.CharPositionInLine + 1, msg);
}
catch (QueryParseException e)
{
throw e;
}
catch (Exception e)
{
throw new QueryParseException(1, 1, e.Message);
}
}
