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| How to handle zero to n child elements |
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| WBI_user |
 Posted: Sun Jul 20, 2003 4:28 pm Post subject: How to handle zero to n child elements |
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Partisan
Joined: 07 Aug 2001
Posts: 386
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I have an XML input message like this:
<msg>
<A1>111</A1>
<A2>222</A2>
<B>
<B1>333</B1>
<B2>444</B2>
:
</B>
<C1>555</C1>
<C2>666</C2>
</msg>
The B element can have zero to many children (0, B1...Bn) of different names.
If B contains no child, the message will be like:
<msg>
<A1>111</A1>
<A2>222</A2>
<B></B>
<C1>555</C1>
<C2>666</C2>
</msg>
Any idea what I have to do in the compute node of a simple flow (INPUT , COMPUTE, OUTPUT nodes) to ensure that there is no error. |
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| kirani |
| Posted: Sun Jul 20, 2003 9:23 pm Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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I didn't get your question. What exactly you need to do in your message flow?
If you are reading your input message as Generic XML then any valid XML message will parse correctly. You don't have to do anything special in your message flow for this.
_________________
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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| WBI_user |
| Posted: Mon Jul 21, 2003 10:30 am Post subject: |
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Partisan
Joined: 07 Aug 2001
Posts: 386
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I should be more specific on my question
If the incoming message is :
<Inventory>
<part1>111</part1>
<part2>222</part2>
<part2_colour>
<red>10</red>
<white>20</white>
:
</part2_colour>
<part3>555</part3>
<part4>666</part4>
</Inventory>
This message says there are 222 part2s. 10 of them are red and 20 of them are white ......
I can have a number of part2 colours. Of course we know what are the colours, so there will a maximum number of "colour tags"
In my compute node, I have to act on each parts (say store the number of red and the number of white). For example, I'll do
set RED_C = InputRoot.XML.Inventory.part2_colour.red;
set WHITE_C = InputRoot.XML.Inventory.part2_colour.white;
:
do this for all colour that exist
:
INSERT INTO Database.INVENTORY(RED_NO,WHITE_NO...) VALUES(RED_C,WHITE_C....);
When there is no part2, the input message will look like:
<Inventory>
<part1>111</part1>
<part2></part2>
<part2_colour></part2_colour>
<part3>555</part3>
<part4>666</part4>
</Inventory>
MQSI will fail because InputRoot.XML.Inventory.part2_colour.red does not exist. This will fail for all clours.
What I am looking for is a way to make sure that the flow will not fail when the number of children changes. |
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| inder |
| Posted: Mon Jul 21, 2003 11:34 am Post subject: |
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Apprentice
Joined: 24 Mar 2003
Posts: 49
Location: USA
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AS kiran Said if you are using Generic XML (Not prediefined message set), your Message flow will never fail unless you have a database failure because of null values for the colour fields. (Say if they are Non nullable columns in your Database).
regards
Inder |
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