internal static string Extract(string q, ValueToken val, bool stripQuotes = false)
{
switch (val.Type)
{
case ValueTokenType.False:
return("false");
case ValueTokenType.Null:
return("null");
case ValueTokenType.True:
return("true");
}
if (stripQuotes && val.Type == ValueTokenType.String)
{
return(Extract(q, val.TokenStart + 1, val.TokenLength - 2, val.EscapeChars));
}
return(Extract(q, val.TokenStart, val.TokenLength, val.EscapeChars));
}
private static void WriteSimpleOperatorJavaScript(string query, TextWriter writer, string fieldName, string alias, OperatorType type, ValueToken value)
{
if (alias != null)
{
writer.Write(alias);
writer.Write(".");
}
writer.Write(fieldName);
switch (type)
{
case OperatorType.Equal:
writer.Write(" == ");
break;
case OperatorType.NotEqual:
writer.Write(" != ");
break;
case OperatorType.LessThan:
writer.Write(" < ");
break;
case OperatorType.GreaterThan:
writer.Write(" > ");
break;
case OperatorType.LessThanEqual:
writer.Write(" <= ");
break;
case OperatorType.GreaterThanEqual:
writer.Write(" >= ");
break;
default:
ThrowInvalidType(type);
break;
}
writer.Write(Extract(query, value));
}
private bool Value(out ValueToken val)
{
var numberToken = Scanner.TryNumber();
if (numberToken != null)
{
val = new ValueToken
{
TokenStart = Scanner.TokenStart,
TokenLength = Scanner.TokenLength,
Type = numberToken.Value == NumberToken.Long ? ValueTokenType.Long : ValueTokenType.Double
};
return(true);
}
if (Scanner.String())
{
val = new ValueToken
{
TokenStart = Scanner.TokenStart,
TokenLength = Scanner.TokenLength,
Type = ValueTokenType.String,
EscapeChars = Scanner.EscapeChars
};
return(true);
}
if (Scanner.TryScan(StaticValues, out var match))
{
val = new ValueToken
{
TokenStart = Scanner.TokenStart,
TokenLength = Scanner.TokenLength
};
switch (match)
{
case "true":
val.Type = ValueTokenType.True;
break;
case "false":
val.Type = ValueTokenType.False;
break;
case "null":
val.Type = ValueTokenType.Null;
break;
}
return(true);
}
if (Parameter(out int tokenStart, out int tokenLength))
{
val = new ValueToken
{
TokenStart = tokenStart,
TokenLength = tokenLength,
Type = ValueTokenType.Parameter
};
return(true);
}
val = null;
return(false);
}
