public FilterOperator AddHandler <TLhs, TRhs>(Func <TLhs, TRhs, StringComparison, bool> handler)
{
var operatorTypes = new FilterOperatorTypes(typeof(TLhs), typeof(TRhs));
if (handlers.ContainsKey(operatorTypes))
{
handlers[operatorTypes] = handler;
}
else
{
handlers.Add(operatorTypes, handler);
}
return(this);
}
public virtual IFilterOperation GenerateOperation(int operatorIndex, List <QueryError> errors, QueryEngineImpl <TObject> engine)
{
Func <TObject, bool> operation = o => false;
var filterValue = m_FilterValueParseResult.parsedValue;
var handlerTypedKey = new FilterOperatorTypes(typeof(TFilterVariable), typeof(TFilterConstant));
var handlerGenericKey = new FilterOperatorTypes(typeof(object), typeof(object));
var stringComparisonOptions = m_Filter.overrideStringComparison ? m_Filter.stringComparison : engine.globalStringComparison;
var error = "";
if (m_Operator.handlers.ContainsKey(handlerTypedKey))
{
if (!(m_Operator.handlers[handlerTypedKey] is Func <TFilterVariable, TFilterConstant, StringComparison, bool> handler))
{
error = $"Filter operator handler of type ({handlerTypedKey.leftHandSideType}, {handlerTypedKey.rightHandSideType}) could not be" +
$" converted to Func<{handlerTypedKey.leftHandSideType}, {handlerTypedKey.rightHandSideType}, bool>";
errors.Add(new QueryError(operatorIndex, error));
}
else
{
operation = o => handler(m_Filter.GetData(o), filterValue, stringComparisonOptions);
}
}
