public static IEnumerable <QueryCondition> ParseQueryConditions(this string query)
{
var stringSpan = new StringSpan(query);
stringSpan.MoveToTheNextStartOfString();
while (!stringSpan.Eof)
{
var fieldName = stringSpan.ReadNextString();
var operation = stringSpan.ReadOperation();
if (operation == QueryOperation.In)
{
var value = stringSpan.ReadInValues();
yield return(new QueryCondition
{
FieldName = fieldName,
Values = value.ToArray(),
Operation = operation
});
}
else
{
var value = stringSpan.ReadNextString();
yield return(new QueryCondition
{
FieldName = fieldName,
Values = value.ToSingleArray(),
Operation = operation
});
}
stringSpan.MoveToTheNextStartOfString();
if (stringSpan.Eof)
{
break;
}
var logicalOperator = stringSpan.ReadNextString();
if (logicalOperator.ToLower() != "and")
{
throw new Exception("Only and logical operation is supported for a while");
}
}
}
private static QueryOperation ReadOperation(this StringSpan src)
{
var opString = src.ReadNextString();
return(opString.ParseQueryOperation());
}
