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| DFDL Length of a complex type |
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| bobbee |
 Posted: Thu Apr 02, 2015 12:39 pm Post subject: DFDL Length of a complex type |
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Knight
Joined: 20 Sep 2001
Posts: 545
Location: Tampa
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I have a message, in it are three complex types, Two fixed and one 1:unbounded. in the 1:unbounded are string elements 1055 bytes long. I want the number of these. Fo I was trying the following
SET ALE_IDoc_LEN = LENGTH(ASBITSTREAM(InputRoot.DFDL.ns:ALE_IDoc));
SET SAPH_LEN = LENGTH(ASBITSTREAM(InputRoot.DFDL.ns:ALE_IDoc.SAPH));
SET DC_LEN = LENGTH(ASBITSTREAM(InputRoot.DFDL.ns:ALE_IDoc.DC));
Then I was going to do a little math and come up with the number of segments.
ET OutputLocalEnvironment.variables.NUM_SEGS = (ALE_IDoc_LEN - (SAPH_LEN + DC_LEN)) / 1055;
All three of the statements with ASBITSTREAM returns the length of the whole message even though I pointed to a subtree in the message. |
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| fjb_saper |
| Posted: Fri Apr 03, 2015 10:08 am Post subject: Re: DFDL Length of a complex type |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| bobbee wrote: |
I have a message, in it are three complex types, Two fixed and one 1:unbounded. in the 1:unbounded are string elements 1055 bytes long. I want the number of these. Fo I was trying the following
SET ALE_IDoc_LEN = LENGTH(ASBITSTREAM(InputRoot.DFDL.ns:ALE_IDoc));
SET SAPH_LEN = LENGTH(ASBITSTREAM(InputRoot.DFDL.ns:ALE_IDoc.SAPH));
SET DC_LEN = LENGTH(ASBITSTREAM(InputRoot.DFDL.ns:ALE_IDoc.DC));
Then I was going to do a little math and come up with the number of segments.
ET OutputLocalEnvironment.variables.NUM_SEGS = (ALE_IDoc_LEN - (SAPH_LEN + DC_LEN)) / 1055;
All three of the statements with ASBITSTREAM returns the length of the whole message even though I pointed to a subtree in the message. |
Usually that won't work unless you have heavy customization.
The idoc is comprized of
1) 1 EDI_DC40 control record => fixed length (don't remember)
2) N EDI_DD40 segment records => fixed length 1063 bytes. (SData is 1000 bytes)
Don't know where you are grabbing the 1055 number from. Should be 1063... IIRC...
The setup of the IDOC in SAP determines the hierarchy of the segments and max instances for the data. The actual data determines the number of instances.
The DFDL should be set on implicit. If you want to calculate the length you would need to check the number of segments EDI_DD40 times 1063 + length of EDI_DC40
If you are also dealing with the SAPH header you'd have to add that to the total length of the MQ Message payload...
Hope this helps 
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| bobbee |
| Posted: Fri Apr 03, 2015 11:15 am Post subject: |
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Knight
Joined: 20 Sep 2001
Posts: 545
Location: Tampa
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So I hard coded the length, I have no idea what your system is generating but once I set the length in UDP's ad used them for the Headers everything worked fine. The Segment data is 1055. Works perfect.
I think DFDL and Broker are just wonderful things. The great savior of text data. I have a structure of fixed (explicit) data items. I know the length. Why doesn't the parser. Maybe it's tired and too smart. Regardless of 1055 or 1063. If I ask you for the overall length and the items are at least FIXED, you should give it to me. I can do this in COBOL VERY easy!!!!!!! Thanks for your input, but I still don't see an automagical way of getting this length out. I counted bytes and my demo is ready. |
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| fjb_saper |
| Posted: Fri Apr 03, 2015 7:51 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Congrats. Glad it works for you  
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