public object Evaluate(
EventBean[] eventsPerStream,
bool isNewData,
ExprEvaluatorContext context)
{
var pattern = (string) _patternEval.Evaluate(eventsPerStream, isNewData, context);
if (pattern == null) {
return null;
}
var es = '\\';
if (_optionalEscapeEval != null) {
var escapeString = (string) _optionalEscapeEval.Evaluate(eventsPerStream, isNewData, context);
if (!string.IsNullOrEmpty(escapeString)) {
es = escapeString[0];
}
}
var likeUtil = new LikeUtil(pattern, es, false);
var value = _lhsEval.Evaluate(eventsPerStream, isNewData, context);
if (value == null) {
return null;
}
if (_form.IsNumericValue) {
value = value.ToString();
}
var result = _form.ForgeRenderable.IsNot ^ likeUtil.CompareTo((string) value);
return result;
}
/// <summary>
/// Match the string returning true for a match, using SQL-like semantics.
/// </summary>
/// <param name="stringToMatch">string to match</param>
/// <returns>true for match</returns>
public bool Match(string stringToMatch)
{
if (stringToMatch == null) {
return false;
}
return _likeUtil.CompareTo(stringToMatch);
}