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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » Conversion

Conversion

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bobbee

Posted: Tue Jun 16, 2015 1:08 am Post subject: Conversion

Knight

Joined: 20 Sep 2001
Posts: 545
Location: Tampa

I need an eight byte HEX field that looks like this:

value -70 30 05 43 00 00 80 20
byte - 0 1 2 3 4 5 6 7

They are sending me 16 bytes of character data Below. This is actually coming in as a BLOB. Would I manually convert this by looping through the 16 characters doing BIT manipulation with an XREF table. Is there a way doing a CAST. I just got this requirement last night.

value - 70 30 05 43 00 00 80 20
byte - 01 23 45 67 89 ab cd ef

mqjeff

Posted: Tue Jun 16, 2015 4:44 am Post subject:

Grand Master

Joined: 25 Jun 2008
Posts: 17447

DFDL supports bit level fields.

bobbee

Posted: Tue Jun 16, 2015 5:11 am Post subject:

Knight

Joined: 20 Sep 2001
Posts: 545
Location: Tampa

Waiting to test, but this is what i came up with, with a liitel help from someone.

Code:

public class Convert {

public static byte[] convert(String before) throws Exception {
   try {
/*    String s="7030054300008020"; */
      byte[] b = new BigInteger(before,16).toByteArray();
      return (byte[]) b;

   } catch (Exception e) {
      System.out.println("Error in CONVERSION method!!");
      e.printStackTrace();
      byte[] ERROR = { (byte) 204 };
      return (byte[]) ERROR;
   }
}

fjb_saper

Posted: Tue Jun 16, 2015 6:48 am Post subject:

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY

Sounds about right but for the fact that you're never going to throw an exception... Remove the throws exception from the signature...
And you might want to check the size of the byte array being returned...

Now about that cast how about

Code:

DECLARE cval Char '70.....';
DECLARE bval = BLOB;
cval = 'x' || cval;
bval = CAST (cval AS BLOB);

or something like it...
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