Description
From an Email thread with James Garriss:
While I got the workaround working, I definitely think this is an improvement opportunity for your API. It should have simple methods that:
�� Detect a ���leftover data��� condition.
�� Return some sort of pointer to the location of the leftover data.
�� Return the entirety of the leftover data.
This would be super helpful for anyone trying to use Daffodil in a filter.
----Original Message----
From: Steve Lawrence slawrence@tresys.com
Sent: Wednesday, October 08, 2014 10:05 AM
...
Subject: Re: Daffodil 0.14 - warning about extra, unprocessed data
Yep, it looks like our CLI has two ways we determine if there is left
over data.
The first is the isAtEnd method. The problem with this is that I think
it only works if you provide the size of your data to the parse()
method. Otherwise, it will always return false. This is a bug. However,
the workaround is to get the size of your input data, and pass it to the
parse function, e.g.:
ParseResult pr = processorFactory.parse(input, lengthOfInput)
The second way is to read the internal state to determine the length of
the data and compare that with the resulting data location. This is what
the Scala CLI does when the length isn't known. The problem with this
method is that it is internal information that is not available via the
Java API, so while it works for our CLI written in Scala, it can't be
used in your GUI. I'm not sure this information should be available via
the API, I think we just need to fix the first bug.
So the short of it, pass in the length of your data and I think isAtEnd
will work.
- Steve
Attachments
Issue Links
- is duplicated by
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DAFFODIL-1799 Enable data streaming in the CLI
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- Closed
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