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| Message set sequence issue while trying to restrict the len. |
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| dpu.gujjar |
 Posted: Wed Aug 22, 2018 5:46 am Post subject: Message set sequence issue while trying to restrict the len. |
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Newbie
Joined: 22 Aug 2018
Posts: 4
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I have designed message set as below
--> Choice
--->Sequence(1)
-->Value1
-->Value2
-->Value3
-->Value4
--->Sequence(2)
-->ValueX
The sequence 1 has group indicator /AB- & Data Pattern as /[A][B]-([^\r]|(\r[^\n])){8,11}\r?$\n. Ideally this sequence1 should not be picked if the length of the value if less than 8 or more than 11 and it should be assigned to Sequence2. But Sequence1 is not accepting valid value when used this data patteren, and it is accepted with pattern /[A][B]-([^\r]|(\r[^\n]))* and invalid scenario more than 11 is also accepted with this.
Can someone please tell me where I am going wrong |
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| dpu.gujjar |
| Posted: Thu Aug 23, 2018 7:38 am Post subject: |
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Newbie
Joined: 22 Aug 2018
Posts: 4
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below is more simplified question,
why sequence is not restricting the length when regular expression [A-Z]{8} is used in pattern, the sequence is accepting the data that has more than 8 characters which is abruptly stopping the processing of the message set |
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| Vitor |
| Posted: Thu Aug 23, 2018 7:49 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| dpu.gujjar wrote: |
below is more simplified question,
why sequence is not restricting the length when regular expression [A-Z]{8} is used in pattern, the sequence is accepting the data that has more than 8 characters which is abruptly stopping the processing of the message set |
Well a sequence is just a set of DFDL fields, but a field with a pattern of [A-Z]{8} will attempt to match that. If it's presented with a field which doesn't match that pattern, it fails (as you've discovered).
So it will "restrict" the field to values which match the pattern but it will not "restrict" the values by making them conform - how could it? If it's faced with 11 lower case letters it could truncate & fold to upper case but what could it do with 8 digits? or 11 digits?
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| Vitor |
| Posted: Thu Aug 23, 2018 7:51 am Post subject: Re: Message set sequence issue while trying to restrict the |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| dpu.gujjar wrote: |
| The sequence 1 has group indicator /AB- & Data Pattern as /[A][B]-([^\r]|(\r[^\n])){8,11}\r?$\n. Ideally this sequence1 should not be picked if the length of the value if less than 8 or more than 11 and it should be assigned to Sequence2. |
It also looks like you're trying to validate the 4 child fields of sequence one in a single pattern.
I don't think that's a good idea, even if it works.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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