public List <SearchToken> ToTokens(string searchText)
{
Token token;
var tokenizer = new StringTokenizer(searchText);
var tokenList = new List <SearchToken>();
do
{
token = tokenizer.Next();
switch (token.Kind)
{
case TokenKind.NotOperator:
token = tokenizer.Next();
tokenList.Add(new AntiStringToken {
Value = token.Value
});
break;
case TokenKind.AttributeOperator:
var attributeValue = token.Value.Substring(1);
tokenList.Add(new SearchAttributeToken {
Value = attributeValue
});
break;
case TokenKind.KeyValueOperator:
Token operand = tokenizer.Next();
var keyAsString = token.Value.Remove(token.Value.Length - 1).ToLower(); // strip off the trailing colon (:)
TSearchKeyOperator keyAsEnum;
if (!Enum.TryParse(keyAsString, true, out keyAsEnum))
{
var allowedKeys = ((TSearchKeyOperator[])Enum.GetValues(typeof(TSearchKeyOperator))).ToList();
allowedKeys.RemoveAll(m => Convert.ToInt32(m) == 0);
var allowedKeyCsv = string.Join(", ", allowedKeys);
throw ArtemisException.Create($"{keyAsString} is not a recognised search key. Valid values are: {allowedKeyCsv}");
}
var keyValueTokenPair = new SearchKeyValuePairToken <TSearchKeyOperator> {
Key = keyAsEnum, Value = operand.Value
};
// Allow transformation of search input values
if (OnSearchTokenKeyValuePair != null)
{
OnSearchTokenKeyValuePair(operand, keyValueTokenPair);
}
tokenList.Add(keyValueTokenPair);
break;
case TokenKind.Number:
tokenList.Add(new SearchNumberToken {
Value = token.Value
});
break;
case TokenKind.Word:
case TokenKind.QuotedString:
tokenList.Add(new SearchStringToken {
Value = token.Value
});
break;
}
}while (token.Kind != TokenKind.EOF);
return(tokenList);
}
/// <summary>
/// Allows consumers to intercept and transform search values - eg: enums from ints to text for neo4j
/// </summary>
protected virtual void OnSearchTokenKeyValuePair(Token sourceToken, SearchKeyValuePairToken <TSearchHeadEnum> searchToken)
{
}
