switch statement in a variable

[rossi_jeff]

 Is there a way to make this work?

I have various values I need to show according to the value of an integer value in a field.

I've tried many different syntax but all end in compile errors.

 

Code:

switch ( $F{sensor_readings_sensor_type}.intValue() ) {    case 0: "Integer"; break;    case 1: "String"; break;    case 2: "Float"; break;    case 3: "Digital"; break;    case 4: "Complex"; break;    case 5: "Location"; break;    case 6: "Diagnostics"; break;    case 7: "Bitmap"; break;}

[cbarlow3]

I often just add a field to the query itself so it shows up as a field in iReport:

SELECT ...

sensor_readings_sensor_type,

CASE sensor_readings_sensor_type

   WHEN 0 THEN 'Integer'

   WHEN 1 THEN 'String'

   WHEN 2 THEN 'Float'

   WHEN 3 THEN 'Digital'

   WHEN 4 THEN 'Complex'

   WHEN 5 THEN 'Location'

   WHEN 6 THEN 'Diagnostics'

   ELSE 'Unknown'

END AS sensor_type_description

[rossi_jeff]

This worked but I'd still like to know why swictch did not.

 

("Integer,String,Float,Digital,Complex,Location,Diagnostics,Bitmap".split(",")[$F{sensor_readings_sensor_type}.intValue()])

[mdahlman]

You cannot have full lines of code. (If you see a semi-colon then you're probably going to have trouble.) You can only have expressions.

Therefore you could also solve switch type problem like this:

sensor_readings_sensor_type == 0
  ? 'Integer'
  : sensor_readings_sensor_type == 1
    ? 'String'
    : sensor_readings_sensor_type == 2
      ? 'Float'
      : and so on...

But frankly, your solution appears much nicer. (But I'm not sure whether yours would degrade nicely if the incoming value for sensor_readings_sensor_type is very large or otherwise unexpected.)

Regards,
Matt

[noa123]

Hi ,

What if my field value is a string?

I tried this:
$F{FIELDV}.equals("ab") ? "aaaa" :
$F{FIELDV}.equals("bc") ? "bbbb" :
$F{FIELDV}.equals("de") ? "cccc" : ""

but it didn't work... any idea?

Thank's In Advance.

 

 

[despec]

Don't forget to enclose in parentheses:

 

( $F{FIELDV}.equals("ab") ? "aaaa" :

( $F{FIELDV}.equals("bc") ? "bbbb" :

( $F{FIELDV}.equals("de") ? "cccc" : "" )))

[noa123]

It work's great!

thank's!!