Re: [fcrepo-user] Using ImageManip srv to manipulate image with URL stored in RELS-EXT

Damian Kaliszan Wed, 03 Nov 2010 05:10:30 -0700

Hi Steve,

Yes, you're 100% right.
RELS-EXT content might  be taken from my previous email (if it's not enough I
can send you the xml source of the object)


Subject               Predicate           Object
-----------------------------------------------------
info:fedora/ns:pid    ns:isMemberOf  ns:measurements
info:fedora/ns:pid    ns:property    ns:244
info:fedora/ns:pid    ns:device      ns:229
info:fedora/ns:pid    ns:value       
"http://www.google.pl/intl/en_com/images/srpr/logo1w.png";
info:fedora/ns:pid    ns:datetime   ""1288347628020""


If  it's  possible  what  I'm going to do I would need to create Sdep,
SDef    like    it's    done    in    demo   objects   demo:27 (Sdef),
demo:28(Sdep)  & demo:UVA_STD_IMAGE (CM Object)

This is a fragment taken from demo:28/WSDL

<wsdl:operation name="resizeImage">
      <http:operation 
location="ImageManipulation?url=(url)&amp;op=resize&amp;newWidth=(width)"/>
      <wsdl:input>
        <http:urlReplacement/>
      </wsdl:input>
      <wsdl:output>
        <mime:content type="image/gif"/>
        <mime:content type="image/jpeg"/>
        <mime:content type="image/tiff"/>
        <mime:content type="image/png"/>
        <mime:content type="image/bmp"/>
      </wsdl:output>
    </wsdl:operation>

demo:29  is an example object having the model demo:UVA_STD_IMAGE with
separate datastream 'url'.


This  is  exactly  what  I'mging  to  do but instead of separate 'url'
datastream    I'd    like    to    take    the    image    url value from
RELS-EXT#ns:value .....

So it would be something like...

<http:operation 
location="ImageManipulation?url=(RELS-EXT#ns:value)&amp;op=resize&amp;newWidth=(width)"/>

Hope you can help....

BTW -> Can object 'support' more than one models?

Best regards,
Damian




W Twoim liście datowanym 3 listopada 2010 (12:47:37) można przeczytać:

> Hi Damian

> Maybe I am misunderstanding what you are trying to do.

> My understanding was:

> 1) Your RELS-EXT datastream contains an image URL
> 2) you want to extract this image URL and pass this to a method (ie through
> the WSDL of an SDep) so that the imagemanip service can resize it?

> Is that correct?

> If so, can you give me an example of your RELS-EXT which includes the Image
> URL.

> Regards
> Steve

>> -----Original Message-----
>> From: Damian Kaliszan [mailto:dam...@man.poznan.pl] 
>> Sent: 03 November 2010 10:11
>> To: Steve Bayliss
>> Cc: fedora-commons-users@lists.sourceforge.net
>> Subject: Re: Using ImageManip srv to manipulate image with 
>> URL stored in RELS-EXT


>> Dear Steve,

>> Thank you for your answer.

>> I was thinking about your answer...

>> The problem is the measurement values come from different sources.
>> Shortly...my model is as follows.
>> I  have  different  devices (collection of devices), described by some
>> properties  (collection  of  properties) and measurements described by
>> (values stored in RELS-EXT):
>> Single measurement's RELS-EXT:
>> -------------------------------
>> info:fedora/ns:pid    ns:isMemberOf  ns:measurements
>> info:fedora/ns:pid    ns:property   ns:244
>> info:fedora/ns:pid    ns:device     ns:229
>> info:fedora/ns:pid    ns:value      ""10zeg7bdjb2j6""
>> info:fedora/ns:pid    ns:datetime   ""1288347628020""


>> So as you can see ns:value is "some value" at this point....

>> Once  the  value  might  be a  temperature, the other time humidity or
>> - if the device is a camera - the value is an URL of the picture....
>> So,  at  the point of ingesting the object I don't want the repository
>> to  know  what  "type"  of  value is it - an integer, url of something
>> different.....

>> By  creating  a  datastream  it  would  complicate  things a bit.... I
>> think...This   datastream   would  store  only one value ...If I could
>> store  non-XML data (image url as well) in 'Internal XML 
>> data' type datastream and call it
>>  - let's    say -  IMAGE then I could update my SDep (WSDL 
>> datastream in
>> measurementsCollectionImpl  that provides list of all measurements) so
>> this IMAGE could be referenced as

>> http://myserver:port/imagemanip/Imagemanip?url=(IMAGE)&amp;op=
>> resize...
>> This  is  clear  for  me...But  it  cannot  be  done  because - as the
>> name says - Internal XML data' does not let me save non-xml 
>> data inside...


>> Is  there any way to do it I described in my previous email? -> values
>> are   store   in  RELS-EXT?  But  how  to  reference  it  
>> later in  WSDL  of
>> measurementsCollectionImpl?

>> http://myserver:port/imagemanip/Imagemanip?url=(RELS-EXT#MY:PR
>> ED)&amp;op=resize..
>> ??????



>> Best regards,
>> Damian

>> W Twoim liście datowanym 3 listopada 2010 (10:30:24) można przeczytać:

>> > Hi Damian

>> > One thought, which doesn't directly address your question 
>> but might provide
>> > an alternative (possibly simpler?) method to achieve what 
>> you want to do:

>> > How about creating a datastream, type "External" or 
>> "Redirect" for your
>> > IMAGE_URL - ie a Fedora datastream that acts as a proxy for 
>> the IMAGE_URL?

>> > You could then reference this Fedora datastream directly in 
>> the method.

>> > Optionally you could reference the Fedora datastream URI (eg
>> > info:fedora/ns:pid/experiment_image) in the RELS_EXT rather than the
>> > external URL.

>> > (this also potentially has the benefit of introducing a level of
>> > indirection, so if for instance you had to change the 
>> external service that
>> > is currently providing these images, you would just update 
>> what the Fedora
>> > datastream points to).

>> > Regards
>> > Steve

>> >> -----Original Message-----
>> >> From: Damian Kaliszan [mailto:dam...@man.poznan.pl] 
>> >> Sent: 03 November 2010 08:58
>> >> To: Steve Bayliss
>> >> Cc: fedora-commons-users@lists.sourceforge.net
>> >> Subject: Using ImageManip srv to manipulate image with URL 
>> >> stored in RELS-EXT
>> >> 
>> >> 
>> >> Dear Steve, All!
>> >> 
>> >> I  use  FC  to store some measurements (from real 
>> instruments) values.
>> >> One  of  them  is  image  URL  of  the experiment. I store 
>> this URL in
>> >> RELS-EXT (MY:PID->MY:PRED->IMAGE_URL) datastream
>> >> I'd  like to use built-in Imagemanip service to get the 
>> original image
>> >> resized/cropped etc.
>> >> 
>> >> How to pass IMAGE_URL from RELS_EXT (or DC if it's better) to 
>> >> Imagemanip?.....
>> >> 
>> >> Similarly as it was done in example CollectionImpl with 
>> >> 'list' disseminator
>> >> http://myserver:port/saxon/SaxonServlet?source=(LIST)&amp;styl
>> > e=(XSLT)&amp;clear-stylesheet-cache=(CLEAR_CACHE)"/>
>> > But here LIST & XSLT are different datastreams (called LIST & XSLT)
>> > So.. In my case it would be something like:

>> > 
>> http://myserver:port/saxon/Imagemanip?url=(RELS-EXT#MY:PRED)&a
> mp;op=resize..


>> Then, under the method getChangedImage I'd have the appropriate method
>> called  from WSDL (that I would have to create of course...like in the
>> Collection example)

>> http://myserver:port/fedora/objects/MY:PID/methods/getChangedImage


>> Is it possible at all? If so, could you please help me with that?


>> Best regards,
>> Damian

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Re: [fcrepo-user] Using ImageManip srv to manipulate image with URL stored in RELS-EXT

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