private ParseTree Parse(string source, List <EqlError> errors)
{
if (string.IsNullOrWhiteSpace(source))
{
throw new EqlException("Source is empty.");
}
if (errors == null)
{
errors = new List <EqlError>();
}
var grammar = new EqlGrammar();
var language = new LanguageData(grammar);
var parser = new Parser(language);
var tree = parser.Parse(source);
if (tree.HasErrors())
{
foreach (var error in tree.ParserMessages.Where(x => x.Level == Irony.ErrorLevel.Error))
{
EqlError err = new EqlError {
Message = error.Message
};
err.Line = error.Location.Line;
err.Column = error.Location.Column;
errors.Add(err);
}
}
return(tree);
}
/// <summary>
/// Build EQL to SQL
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
public EqlBuildResult Build(List <EqlParameter> parameters = null)
{
if (parameters != null)
{
Parameters = parameters;
}
var grammar = new EqlGrammar();
var language = new LanguageData(grammar);
var parser = new Parser(language);
List <EqlError> errors = new List <EqlError>();
var parseTree = Parse(Text, errors);
EqlBuildResult result = new EqlBuildResult();
try
{
if (errors.Count == 0)
{
result.Tree = BuildAbstractTree(parseTree);
}
if (errors.Count == 0)
{
Entity fromEntity = null;
result.Sql = BuildSql(result.Tree, errors, result.Meta, out fromEntity);
result.FromEntity = fromEntity;
}
result.Errors.AddRange(errors);
result.Parameters.AddRange(Parameters);
result.ExpectedParameters.AddRange(ExpectedParameters);
}
catch (EqlException)
{
throw;
}
catch (Exception ex)
{
result.Errors.Add(new EqlError {
Message = ex.Message
});
}
return(result);
}
