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| Repeating structures in CWF |
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| RB |
 Posted: Tue Jan 23, 2007 12:31 pm Post subject: Repeating structures in CWF |
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Acolyte
Joined: 23 May 2006
Posts: 56
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I have a message flow with transformation from XML to CWF (copy book structure). I am using MB6
I have a single repeating structure as given below.
| Code: |
Structure Type MinOccurs MaxOccurs
-------------------------------------------------------------------------
+Detail Detail 1 -1
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The detail structure could be repeating 'n' times. But I couldn't get a response with n repeating structures. Though I can see in the trace file that it is mapping all the structures, it is always coming as 1.
I even tried to modify the structure to have a finite MaxOccurs value. Eg: I set the MaxOccurs as 3 and send 3 structures in the input XML. I could see from the trace that it is building a message with 3 Detail structures, but once it puts the message to the queue there is only one detail structure.
I tried to modify my structure to have a Header field (or rather a non repeating field) as given below.
| Code: |
Structure Type MinOccurs MaxOccurs
-------------------------------------------------------------------------
Header Header 1 1
+Detail Detail 1 -1
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Once I have a non repeating field, I could successfully get 'n' number of repeating structures in the output by setting MaxOccurs = -1.
I have seen couple of postings in the forum about repeating structures not working (with MaxOccurs = -1). But for me it is working fine, if I am adding this non repeating field. I would appreciate if anyone can explain what is the reason for this?
Regards,
rb |
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| kimbert |
| Posted: Wed Jan 24, 2007 1:50 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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Hi RB,
v6 actually has very good support for this scenario, but there is a defect - and I think you have found it. If the element with maxOccurs=-1 is the only member of its group/complex type then only one occurrence is written. There are two workarounds:
A. Add a dummy element as the first member of the group/complex type. Set minOccurs=0, maxOccurs=0 so that it does not affect the bitstream at all.
B. Add an integer element to the group/complex type. Set its value to the actual number of repeats. Set the 'Repeat Reference' property of the repeating element to point at the integer element.
I think A is simpler. |
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| RB |
| Posted: Wed Jan 24, 2007 7:39 am Post subject: |
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Acolyte
Joined: 23 May 2006
Posts: 56
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Thanks Kimbert!
I think first solution is better as it is not affecting the bit stream at all.
Regards,
RB |
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