>From a forensic use case it is better just saying we are trying another
parser and not resetting the content handler, because the first parser can
extract relevant content before the exception.
To not spool everything to temp files to re-read the stream, I think we can
create an optional setinputstreamfactory() method in TikaInputStream, so
the user can implement an InputStreamFactory interface with a
getInputStream method, if he does not want to pay a performance hit with
temp files for everything.
Luis
Em 5 de fev de 2018 4:52 PM, "Chris Mattmann" <mattm...@apache.org>
escreveu:
I think we should just say, OK now we're trying a different parser....
On 2/5/18, 9:51 AM, "Allison, Timothy B." <talli...@mitre.org> wrote:
To my mind, the real challenge is what to do with content that should
be ignored...
If the strategy is back-off-on-exception (try the DOCX parser, but if
there's an exception, use the Zip parser), what do we do with the sax
elements that have already been written? Do we need a new handler type
that has a reset() method?
Or do we just say, hey, now we're trying a different parser...
-----Original Message-----
From: Mattmann, Chris A (1761) [mailto:chris.a.mattm...@jpl.nasa.gov]
Sent: Monday, February 5, 2018 12:29 PM
To: dev@tika.apache.org
Subject: Re: Not-yet-broken breaking changes for Tika 2?
Our solution is just to run the parser 2x....yes I get it will induce
overhead, but as a start, why not?
In short just run through the stream 2x....
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++
Chris Mattmann, Ph.D.
Associate Chief Technology and Innovation Officer, OCIO Manager,
Advanced IT Research and Open Source Projects Office (1761) Manager, NSF
and Open Source Programs and Applications Office (8212) NASA Jet Propulsion
Laboratory Pasadena, CA 91109 USA
Office: 180-503E, Mailstop: 180-502
Email: chris.a.mattm...@nasa.gov
WWW: http://sunset.usc.edu/~mattmann/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++
Director, Information Retrieval and Data Science Group (IRDS) Adjunct
Associate Professor, Computer Science Department University of Southern
California, Los Angeles, CA 90089 USA
WWW: http://irds.usc.edu/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++
On 2/5/18, 9:25 AM, "Nick Burch" <apa...@gagravarr.org> wrote:
On Mon, 5 Feb 2018, Chris Mattmann wrote:
> Let's have a go at implementing it! You know my thoughts (make it
like
> OODT ;) )\
I'm still keen to hear how we can do the text content like OODT!
I have tried to copy the OODT model for the proposed metadata case
though
:)
Nick
> On 2/5/18, 8:37 AM, "Nick Burch" <apa...@gagravarr.org> wrote:
>
> Ping - anyone got any thoughts on the proposed metadata parser
stuff, and
> any ideas on the content part?
>
> On Tue, 2 Jan 2018, Nick Burch wrote:
> > On Thu, 26 Oct 2017, Chris Mattmann wrote:
> >> On collision, the precedence order defines what key takes
precedence and
> >> _overwrites_ the other. Overwrite is but one option (you
could save *all*
> >> the values it’s a multi-valued key structure so…)
> >
> > OK, I think that's fine. I've had a go at updating the wiki
for the metadata
> > case:
> > https://wiki.apache.org/tika/CompositeParserDiscussion#
Supplementary.2FAdditive
> > And example Tika Config settings for it
> > https://wiki.apache.org/tika/CompositeParserDiscussion#
line-20
> > If people are happy with how that sounds/looks, I can have a
stab at
> > implementing it, as I *think* it's quite easy
> >
> >
> > However... that still leaves the Context (XHTML SAX events)
case to solve!
> >
> > Anyone have any ideas on how we can append to or
cancel/reset the Content
> > Handler series of SAX events when we move onto a second+
parser for a file?
> >
> > Thanks
> > Nick
> >
> >> On 10/26/17, 9:43 AM, "Nick Burch" <apa...@gagravarr.org>
wrote:
> >>
> >> On Thu, 26 Oct 2017, Chris Mattmann wrote:
> >> > My general approach to conflicting metadata is simply
to define
> >> > precedence orders.
> >> >
> >> > For example here is one documented from OODT:
> >> >
> >> >
> >> https://cwiki.apache.org/confluence/display/OODT/
Understanding+CAS-PGE+Metadata+Precendence
> >> >
> >> > We can do similar things with Tika, e.g.,
> >> >
> >> > [CoreMetadata.PROPERTIES]
> >> > [ImageParser.METADATA]
> >> > [TikaOCR.METADATA]
> >>
> >> What happens if two different parsers both output the
same bit of
> >> metadata
> >> though? eg Tim's example of one giving dc:creator of Tim
and the second
> >> giving dc:creator of Chris?
> >>
> >>
> >> Secondly, what about the XHTML sax events stream? I
think that's
> >> probably
> >> the harder case...
> >>
> >> Nick
>
>
>
