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MQSeries.net Forum IndexWebSphere Message Broker SupportDFDL for .csv manipulation

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mpong
PostPosted: Tue May 02, 2017 2:56 pm Post subject: DFDL for .csv manipulation Reply with quote

Centurion

Joined: 22 Jan 2010
Posts: 108

Requirement is to clear some of the field values on the .csv file before writing it into target system as per below.

First 3 columns are type and followed by header and Line as below. Need to clear the values on header,Line & LineSplit columns based on the 3 differnt type column field name. For instance id and status column values need to be cleared on header column .
(value 37546,approved need to cleared on header line)

Similarly invoice-id value need to be cleared on Line column (37546) (Second Type Column)

line-num need to cleared on LineSplit column (4444) (Third Type Column).

I have created a DFDL with choice and able to do it for the header line and not able to clear the fields on the Line and LineSplit yet.

Any suggestion would be great helpful.

type,id,created-at,updated-at,status,internal-note
type,invoice-id,invoice-line-id,created-at,updated-at
type,invoice-id,invoice-line-id,line-num,order-header-num
Header,37546,2017-04-14T21:23:06Z,2017-04-14T21:25:12Z,approved,test
Line,37546,42899,2017-04-14T17:23:06-05:00,2017-04-14T17:25:08-05:00
Line,37546,42899,2017-04-14T17:23:06-05:00,2017-04-14T17:25:08-05:00
LineSplit,3333,34343,4444,767676
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mqjeff
PostPosted: Wed May 03, 2017 4:12 am Post subject: Reply with quote

Grand Master

Joined: 25 Jun 2008
Posts: 17257

what does it mean "cleared"?

If you have a CSV row definition that consists of "FieldA,FieldB,FieldC" - what does your output need to look like if any of these fields should be 'cleared'?

If you have a working configuration for one type of record in your DFDL and a non-working configuration for another type of record, then clearly the record definition properties are different.
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mpong
PostPosted: Thu May 04, 2017 7:47 am Post subject: Reply with quote

Centurion

Joined: 22 Jan 2010
Posts: 108

if CSV row definition that consists of "FieldA,FieldB,FieldC" then output should like like "FieldA,FieldC" and this operation should be based on the first three type columns.
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mqjeff
PostPosted: Thu May 04, 2017 8:14 am Post subject: Reply with quote

Grand Master

Joined: 25 Jun 2008
Posts: 17257

mpong wrote:
if CSV row definition that consists of "FieldA,FieldB,FieldC" then output should like like "FieldA,FieldC" and this operation should be based on the first three type columns.


Ok, so let's pretend that FieldA = "123" and Field C = "ABC".

If FieldB was "DEF", then your output would be "123,DEF,ABC"

If FieldB is null, then your output would be "123,ABC".

Which field is "ABC" ? Is it FieldB, or FieldC? How do you know? How does the program reading the file know?

It would have to be "FieldA,,FieldC" to indicate that FieldB is missing.

In terms of using your LineSplit row to decide which columns need to cleared, you need to handle that with code. You will need to create a sequence of choice*"Header","Line"(repeats),"LineSplit")

Then you can use the fields of LineSplit to do what you need to each instance of Line - but this has to be done in code, not in the DFDL model.
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mpong
PostPosted: Tue May 16, 2017 2:16 pm Post subject: Reply with quote

Centurion

Joined: 22 Jan 2010
Posts: 108

It worked after creating 4 separated xsd's with sequence type,header,line & line-split.

Had to write few lines of esql code to clear the fields.

IF( EXISTS(InputRoot.DFDL.linesplit."account-allocation-id"[])) THEN
SET OutputRoot.DFDL.linesplit."account-allocation-id" =''; END IF;
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