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Message
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| somsayan |
 Posted: Thu Apr 16, 2015 8:30 am Post subject: Need DFDL library to not trim the leading spaces |
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Apprentice
Joined: 06 Apr 2007
Posts: 49
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Hi All,
We are using Message Broker 8.0.0.4 on AIX box. The requirement we have is to extract IDOCs out of SAP and for that we have built a flow and it processes the particular IDOC using DFDL.
The IDOC has a particular field in the segment that is right justified and it is padded with ' ' (Space). Naturally the DFDL that got generated via IDOC discovery is trimming the space in front of the data.
Now comes the unnatural requirement to 'not trim' the data. How can we achieve this?
We have tried the to change the XSD to incorporate the requirement
| Code: |
<xsd:element maxOccurs="1" minOccurs="0" name="FIELD1" nillable="true">
<xsd:annotation xml:space="preserve">
<xsd:appinfo source="http://www.ibm.com/xmlns/prod/websphere/j2ca/sap/metadata">
<sapasi:sapALEPropertyTypeMetadata>
<sapasi:FieldName>FIELD1</sapasi:FieldName>
<sapasi:SegmentHierarchy>0</sapasi:SegmentHierarchy>
<sapasi:OffSet>21</sapasi:OffSet>
<sapasi:PrimaryKey>false</sapasi:PrimaryKey>
<sapasi:MaxLength>229</sapasi:MaxLength>
<sapasi:ForeignBOKeyRef/>
</sapasi:sapALEPropertyTypeMetadata>
</xsd:appinfo>
</xsd:annotation>
<xsd:simpleType>
<xsd:restriction base="xsd:string">
<xsd:maxLength value="229"/>
[color=red]<xsd:whiteSpace value="preserve"/>[/color]
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
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But this is not working.
Can anyone suggest a way out ? |
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| mqjeff |
| Posted: Thu Apr 16, 2015 8:46 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| probably just make it a fixed length field. |
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| somsayan |
| Posted: Thu Apr 16, 2015 9:10 am Post subject: |
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Apprentice
Joined: 06 Apr 2007
Posts: 49
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Hi mqjeff,
It is a fixed length field. Its the DFDL that trims out the leading and trailing ' '.
What I would like is to not trim that. Hence added the <xsd:whiteSpace value="preserve"/>line in the xsd. But that doesn't seem to work.
Is there any other way to make it work ? |
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| fjb_saper |
| Posted: Thu Apr 16, 2015 9:16 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20696
Location: LI,NY
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| somsayan wrote: |
Hi mqjeff,
It is a fixed length field. Its the DFDL that trims out the leading and trailing ' '.
What I would like is to not trim that. Hence added the <xsd:whiteSpace value="preserve"/>line in the xsd. But that doesn't seem to work.
Is there any other way to make it work ? |
I presume your DFDL field is set to right justified padded... What type of value is in this field. If it is something that needs to keep the leading blanks, than a right justified field is may be not the way to go... 
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| kimbert |
| Posted: Thu Apr 16, 2015 1:13 pm Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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| Quote: |
| What I would like is to not trim that. Hence added the <xsd:whiteSpace value="preserve"/>line in the xsd. |
Everything that you need to know about padding and trimming in DFDL is in the specification:
http://www-01.ibm.com/support/knowledgecenter/SSMKHH_10.0.0/com.ibm.dfdl.spec.doc/dfdl_index.htm
The xsd:whiteSpace facet is not useful for DFDL because it does not allow the required amount of control over white space handling. So the specification explicitly states that it is not used.
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Before you criticize someone, walk a mile in their shoes. That way you're a mile away, and you have their shoes too. |
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| shanson |
| Posted: Fri Apr 17, 2015 6:39 am Post subject: |
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Partisan
Joined: 17 Oct 2003
Posts: 344
Location: IBM Hursley
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| Add dfdl:textTrimKind="none" to all the elements for which you do not want trimming to occur. |
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| somsayan |
| Posted: Mon Apr 20, 2015 4:31 am Post subject: |
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Apprentice
Joined: 06 Apr 2007
Posts: 49
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Hi Shanson, kimbert
Thanks for your reply. But when we are generating the library using Discovery, we are creating only xsd files and there are no dfdl files created.
Are we missing something ? |
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| fjb_saper |
| Posted: Mon Apr 20, 2015 4:35 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20696
Location: LI,NY
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| somsayan wrote: |
Hi Shanson, kimbert
Thanks for your reply. But when we are generating the library using Discovery, we are creating only xsd files and there are no dfdl files created.
Are we missing something ? |
Don't use Discovery. Get and example and Use the DFDL editor's discovery facilities?
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| shanson |
| Posted: Mon Apr 20, 2015 6:34 am Post subject: |
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Partisan
Joined: 17 Oct 2003
Posts: 344
Location: IBM Hursley
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Please explain exactly what your message flow is doing.
If you are using adapter discovery to create the xsds then you will be using DataObject domain and not DFDL.
Are you using a generic IDoc, and trying to parse it using DFDL? |
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| somsayan |
| Posted: Mon Apr 20, 2015 7:23 am Post subject: |
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Apprentice
Joined: 06 Apr 2007
Posts: 49
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Hi shanson,
I'm using DataObject and not DFDL. Sorry for the confusion. |
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| jhosie |
| Posted: Tue Apr 21, 2015 4:15 am Post subject: |
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Apprentice
Joined: 12 May 2005
Posts: 28
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The recommended way to configure the DataObject parsing is to use the Adapter wizard rather than editing the xsd directly.
You can reconfigure an existing adapter by right clicking on it and chosing "iterative discovery".
In that wizard, on the page with the title "Service Generation and Deployment Configuration", expand the Advanced twistie, and you will see "ALE Data Format configuration" and in that section an option to "Trim ALE IDoc field data". It defaults to true (checked) but it you unckeck it, I am pretty sure that will mean that your white space will be preserved. |
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| somsayan |
| Posted: Tue Apr 21, 2015 7:11 am Post subject: |
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Apprentice
Joined: 06 Apr 2007
Posts: 49
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| jhosie wrote: |
In that wizard, on the page with the title "Service Generation and Deployment Configuration", expand the Advanced twistie, and you will see "ALE Data Format configuration" and in that section an option to "Trim ALE IDoc field data". It defaults to true (checked) but it you unckeck it, I am pretty sure that will mean that your white space will be preserved. |
Hi jhosie,
That was the first option we tried. We couldn't make it to work. |
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| shanson |
| Posted: Tue Apr 21, 2015 8:20 am Post subject: |
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Partisan
Joined: 17 Oct 2003
Posts: 344
Location: IBM Hursley
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| Is there any difference between the xsd created with the option checked, and the xsd created with the option not checked? |
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| somsayan |
| Posted: Tue Apr 21, 2015 1:08 pm Post subject: |
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Apprentice
Joined: 06 Apr 2007
Posts: 49
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| shanson wrote: |
| Is there any difference between the xsd created with the option checked, and the xsd created with the option not checked? |
No there isn't any difference between the contents of the two xsd's. |
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| fjb_saper |
| Posted: Wed Apr 22, 2015 4:26 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20696
Location: LI,NY
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Can you explain why you need the trailing spaces?
SAP doesn't care so much about the trailing spaces... It will fill them in as it creates and populates the field....
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