public IFilterOperation GenerateOperation <TData, TParam, TFilterLhs>(FilterOperationGeneratorData data, Filter <TData, TParam, TFilterLhs> filter, int operatorIndex, List <QueryError> errors)
{
Func <TData, TParam, bool> operation = (o, p) => false;
var filterValue = ((ParseResult <TFilterRhs>)data.filterValueParseResult).parsedValue;
var stringComparisonOptions = filter.overrideStringComparison ? filter.stringComparison : data.globalStringComparison;
var handlerFound = false;
var typedHandler = data.op.GetHandler <TFilterLhs, TFilterRhs>();
if (typedHandler != null)
{
operation = (o, p) => typedHandler(filter.GetData(o, p), filterValue, stringComparisonOptions);
handlerFound = true;
}
if (!handlerFound)
{
var genericHandler = data.op.GetHandler <object, object>();
if (genericHandler != null)
{
operation = (o, p) => genericHandler(filter.GetData(o, p), filterValue, stringComparisonOptions);
handlerFound = true;
}
}
if (!handlerFound)
{
var error = $"No handler of type ({typeof(TFilterLhs)}, {typeof(TFilterRhs)}) or (object, object) found for operator {data.op.token}";
errors.Add(new QueryError(operatorIndex, data.op.token.Length, error));
}
return(new FilterOperation <TData, TParam, TFilterLhs>(filter, data.op, data.filterValue, data.paramValue, operation));
}
public override IFilterOperation GenerateOperation(FilterOperationGeneratorData data, int operatorIndex, List <QueryError> errors)
{
if (resolver)
{
var filterValue = ((ParseResult <TFilter>)data.filterValueParseResult).parsedValue;
// ReSharper disable once ConvertToLocalFunction
Func <TData, bool> operation = o => Resolve(o, data.op, filterValue);
return(new FilterOperation <TData, TFilter>(this, data.op, data.filterValue, operation));
}
else
{
return(data.generator.GenerateOperation(data, this, operatorIndex, errors));
}
}
private BaseFilterOperation <T> GenerateFilterOperation <T>(FilterNode node, QueryEngine <T> engine, ICollection <QueryError> errors)
{
var operatorIndex = node.token.position + node.filter.token.Length + (string.IsNullOrEmpty(node.paramValue) ? 0 : node.paramValue.Length);
var filterValueIndex = operatorIndex + node.op.token.Length;
Type filterValueType;
IParseResult parseResult = null;
if (QueryEngineUtils.IsNestedQueryToken(node.filterValue))
{
if (node.filter?.queryHandlerTransformer == null)
{
errors.Add(new QueryError(filterValueIndex, node.filterValue.Length, $"No nested query handler transformer set on filter \"{node.filter.token}\"."));
return(null);
}
filterValueType = node.filter.queryHandlerTransformer.rightHandSideType;
}
else
{
parseResult = engine.ParseFilterValue(node.filterValue, node.filter, node.op, out filterValueType);
if (!parseResult.success)
{
errors.Add(new QueryError(filterValueIndex, node.filterValue.Length, $"The value \"{node.filterValue}\" could not be converted to any of the supported handler types."));
return(null);
}
}
IFilterOperationGenerator generator = engine.GetGeneratorForType(filterValueType);
if (generator == null)
{
errors.Add(new QueryError(filterValueIndex, node.filterValue.Length, $"Unknown type \"{filterValueType}\". Did you set an operator handler for this type?"));
return(null);
}
var generatorData = new FilterOperationGeneratorData
{
filterValue = node.filterValue,
filterValueParseResult = parseResult,
globalStringComparison = engine.globalStringComparison,
op = node.op,
paramValue = node.paramValue,
generator = generator
};
var operation = node.filter.GenerateOperation(generatorData, operatorIndex, errors);
return(operation as BaseFilterOperation <T>);
}
public abstract IFilterOperation GenerateOperation(FilterOperationGeneratorData data, int operatorIndex, List <QueryError> errors);