Unable to publish exact double value using ETA3.8.3.0

Dan_P

Hi,

Asking this question on behalf of my developer colleague (I'm not a developer myself):

When trying to publish double value to trep, for example: 4324.920024907418

the result seen in the consuming app is 4324,920024907419 or other sligthly different value, probably affected by rounding.

We have tried different approaches but we're unable to get the exact same number as the one we publish.

Any suggestions as to how to get around this and get exact same values?

Example 1:

===============================

    // private final Real doubleValue      = CodecFactory.createReal();
    doubleValue.clear();
    System.out.println("Value before: ");
    System.out.println(value);
    doubleValue.value(value,
            RealHints.EXPONENT_12
    );
    System.out.println("tostring after");
    System.out.println(doubleValue.toString());
    System.out.println("todouble after");
    System.out.println(doubleValue.toDouble());

-----

Value before: 
4324.920024907418
tostring after
4324,920024907419
todouble after
4324.920024907419

Consumer app sees value
4324,920024907419

===============================

Example 2:

===============================

    // private final Real doubleValue      = CodecFactory.createReal();
    doubleValue.clear();
    System.out.println("Value before: ");
    System.out.println(value);
    doubleValue.value(value,
            RealHints.EXPONENT_11
    );
    System.out.println("tostring after");
    System.out.println(doubleValue.toString());
    System.out.println("todouble after");
    System.out.println(doubleValue.toDouble());

-----

Value before: 
4324.920024907418
tostring after
4324,92002490742
todouble after
4324.92002490742

Consumer app sees value
4324,92002490742

===============================

Example 3:

===============================

    // private final Real doubleValue      = CodecFactory.createReal();
    doubleValue.clear();
    System.out.println("Value before: ");
    System.out.println(value);
    doubleValue.value(value,
            RealHints.EXPONENT_13
    );
    System.out.println("tostring after");
    System.out.println(doubleValue.toString());
    System.out.println("todouble after");
    System.out.println(doubleValue.toDouble());

-----

Value before: 
4324.920024907418
tostring after
4324,9200249074180
todouble after
4324.920024907418

Consumer app sees value
4324.9200249074184

===============================

Example 4:

===============================

    // private final Real doubleValue      = CodecFactory.createReal();
    doubleValue.clear();
    System.out.println("Value before: ");
    System.out.println(value);
    doubleValue.value(value,
            RealHints.EXPONENT_14
    );
    System.out.println("tostring after");
    System.out.println(doubleValue.toString());
    System.out.println("todouble after");
    System.out.println(doubleValue.toDouble());

-----

Value before: 
4324.920024907418
tostring after
4324,92002490741800
todouble after
4324.920024907418

Consumer app sees value
4324.92002490741824

===============================

Jirapongse

@Dan_P

Thank you for reaching out to us.

I can replicate this issue. It looks like to be the problem in the conversion logic in the ETA library.

If you are a RDC named user, you can contact the API support team directly via Contact Premium Support to investigate this issue.

Otherwise, you can raise this issue on GitHub.