conversions.txt

rule "conversions"
when true
then
    set_fields({
        string_1: to_string("1"),                           // "1"
        string_2: to_string("2", "default"),                // "2"
        string_3: to_string($message.not_there),            // "" -> not being set in message!
        string_4: to_string($message.not_there, "default"), // "default"

        long_1: to_long(1),                     // 1L
        long_2: to_long(2, 1),                  // 2L
        long_3: to_long($message.not_there),    // 0L
        long_4: to_long($message.not_there, 1), // 1L

        double_1: to_double(1d),                        // 1d
        double_2: to_double(2d, 1d),                    // 2d
        double_3: to_double($message.not_there),        // 0d
        double_4: to_double($message.not_there, 1d),    // 1d

        bool_1: to_bool("true"),                      // true
        bool_2: to_bool("false", true),               // false
        bool_3: to_bool($message.not_there),          // false
        bool_4: to_bool($message.not_there, true),    // true

        ip_1: to_ip("127.0.0.1"),                 // 127.0.0.1
        ip_2: to_ip("127.0.0.1", "2001:db8::1"),  // 127.0.0.1
        ip_3: to_ip($message.not_there),          // 0.0.0.0
        ip_4: to_ip($message.not_there, "::1")    // ::1 (v6)
    });
end