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| DELLIPIZ |
 Posted: Tue Oct 12, 2004 6:47 pm Post subject: Variable length fields |
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Acolyte
Joined: 08 Oct 2003
Posts: 70
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Hi,
When creating an MRM, how would you create a variable length field, using CWF?
I have a COBOL field that can be either 30 - 300 characters.
Thanks!
-Lori |
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| siliconfish |
| Posted: Tue Oct 12, 2004 7:02 pm Post subject: |
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Master
Joined: 12 Aug 2002
Posts: 203
Location: USA
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You can set the "Length Units" in the CWF tab to "End of Bitstream"
| Quote: |
| End of Bitstream. All data to the end of the bitstream is processed. (Valid only if this element is the last in the message. If you select this value, you do not need to enter a value for the properties Length Count or Length Value Of.) |
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siliconfish |
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| DELLIPIZ |
| Posted: Tue Oct 12, 2004 7:11 pm Post subject: |
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Acolyte
Joined: 08 Oct 2003
Posts: 70
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Hi again,
Well, my input is in XML and my output structure needs to look like this in PL1:
FIELD1 CHAR(250) VAR;
FIELD2 CHAR(3000) VAR;
FIELD3 CHAR(1);
Can I still use the 'End of Bitstream' when it is not the last field in the structure?
Thanks!
-Lori |
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| JT |
| Posted: Tue Oct 12, 2004 7:53 pm Post subject: |
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Padawan
Joined: 27 Mar 2003
Posts: 1564
Location: Hartford, CT.
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| JLRowe |
| Posted: Wed Oct 13, 2004 1:15 am Post subject: |
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Yatiri
Joined: 25 May 2002
Posts: 664
Location: South East London
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| In CWF you need a length count element for each variable length field, this is the only way of doing it (except for the last element which can run to the end of bitstream). |
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| EddieA |
| Posted: Wed Oct 13, 2004 8:41 am Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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| Quote: |
| I have a COBOL field that can be either 30 - 300 characters. |
Then, if I remember my COBOL correctly (from far too many years ago), you must also have a field that contains the length of that field. I don't think COBOL supports any "other" type of variable length, like "null terminated".
Cheers,
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Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0 |
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| kirani |
| Posted: Wed Oct 13, 2004 8:49 am Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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This will not work for CWF.
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Kiran
IBM Cert. Solution Designer & System Administrator - WBIMB V5
IBM Cert. Solutions Expert - WMQI
IBM Cert. Specialist - WMQI, MQSeries
IBM Cert. Developer - MQSeries
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| kimbert |
| Posted: Wed Oct 13, 2004 4:35 pm Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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Looks like the last field is only one character, so why not omit it from your message definition. Then you can use ASBITSTREAM to serialize the message into a string, and just stick the final character on the end.
(I have not tried this, but I think it should work) |
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| shanson |
| Posted: Thu Nov 04, 2004 1:47 am Post subject: |
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Partisan
Joined: 17 Oct 2003
Posts: 344
Location: IBM Hursley
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| A PL/I CHAR VAR is a string preceded by (I think) a 2 byte length. That's what the CWF string physical type 'Encoded String 2' is designed to handle. All you have to do is use that. |
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| DELLIPIZ |
| Posted: Fri Nov 12, 2004 5:27 am Post subject: |
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Acolyte
Joined: 08 Oct 2003
Posts: 70
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Hi,
I was looking at the above advice:
A PL/I CHAR VAR is a string preceded by (I think) a 2 byte length. That's what the CWF string physical type 'Encoded String 2' is designed to handle. All you have to do is use that.
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Please forgive my cluelessness... can you show me what my CWF tab for Field2 should look like.
FIELD2 CHAR(3000) VAR;
Thanks!
-Lori |
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| shanson |
| Posted: Mon Nov 15, 2004 4:31 am Post subject: |
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Partisan
Joined: 17 Oct 2003
Posts: 344
Location: IBM Hursley
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Physical Type = Length Encoded String 2
Length Count = <greyed out>
The data is preceded by 2 bytes that give the length of the data. Hence Length Count has no meaning. If you wish to validate that the length of the data is not greater than 3000 then you should add a maxLength facet to the simple type. |
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