[kepler-users] Extracting XML Attributes

[Matt Jones]

As an alternative, if compiling the source isn't something you want to
undertake, maybe Dan could package up a KAR file for you to import into your
installed version of Kepler.  Dan, do you think this would be feasible?

Matt

On Wed, Oct 15, 2008 at 8:59 AM, Daniel Crawl <crawl at sdsc.edu> wrote:

>
>
> Hi Jon,
>
> The nightly build is temporarily not being generated, so you
> will have to download and compile the source. The instructions
> for this can be found here:
>
>
> https://dev.kepler-project.org/developers/reference/downloading-and-building-the-kepler-source-code/
>
> Please let us know if you have any problems,
>
>  --dan
>
>
> Jon Goodall wrote:
>
>> Hi Dan,
>>
>> Do I need to use the nightly build of Kepler to get the updated XPath
>> actor?  I'm having trouble running the attached workflow with the 1.0 Kepler
>> version.
>> Thanks,
>> Jon
>>
>> On Tue, Oct 14, 2008 at 6:41 PM, Daniel Crawl <crawl at sdsc.edu <mailto:
>> crawl at sdsc.edu>> wrote:
>>
>>
>>    Hi Jon,
>>
>>    I've updated the XPath actor with a new port that outputs
>>    attribute or text() data. Attached is a modified version
>>    of your workflow that uses this functionality.
>>
>>    Let me know if you have questions,
>>
>>     --dan
>>
>>
>>    Jon Goodall wrote:
>>
>>        Hello,
>>
>>        I'm trying to extract XML attributes from a web service in
>>        Kepler and
>>        could use some help.  I've tried doing this a couple different
>>        ways.
>>        First, I tried the following xpath query:
>>        /timeSeriesResponse/timeSeries/values/value/@dateTime and the
>>        exception is ...
>>
>>        ptolemy.kernel.util.IllegalActionException: XPath: node
>>        selected with
>>        XPath isn't an element.
>>              at org.sdm.spa.XPath.fire(XPath.java:167)
>>              at ptolemy.actor.AtomicActor.iterate(AtomicActor.java:398)
>>              at
>>
>>  ptolemy.actor.sched.StaticSchedulingDirector.fire(StaticSchedulingDirector.java:170)
>>              at
>>        ptolemy.actor.CompositeActor.fire(CompositeActor.java:400)
>>              at ptolemy.actor.Manager.iterate(Manager.java:688)
>>              at ptolemy.actor.Manager.execute(Manager.java:332)
>>              at ptolemy.actor.Manager.run(Manager.java:1071)
>>              at ptolemy.actor.Manager$3.run(Manager.java:1112)
>>
>>        The xpath query /timeSeriesResponse/timeSeries/values/value
>>        works fine
>>        and gives this response ..
>>
>>        send to channel 0: {<value dateTime="2000-01-01T00:00:00"
>>        qualifiers="A">483</value>, <value dateTime="2000-01-02T00:00:00"
>>        qualifiers="A">464</value> ...
>>
>>        I've also tried using an XMLDisassembler actor to access the
>>        dateTime
>>        attributes, but no luck.  I was able to get the values, but
>>        unable to
>>        get the dateTimes (I tried setting the port name to @dateTime
>>        and to
>>        dateTime).  See attached workflow for details.
>>
>>        One other thing to note is that this service I'm using can return
>>        either simple or complex types.  Right now, I'm working with the
>>        simple type, which is a XML string.  I tried using the complex web
>>        service actor, but still was unable to get at the dateTime
>>        attributes.
>>         If you want to try this yourself, the service is
>>        http://river.sdsc.edu/wateroneflow/NWIS/DailyValues.asmx?WSDL.
>>         The
>>        method GetValues returns the XML string, the method
>>        GetValuesObject
>>        returns a complex type.
>>
>>        The workflow is attached if you want to take a look.  The goal is
>>        simply to create a chart of the streamflow time series.  I would
>>        appreciate any help on this.  Thanks in advance!
>>
>>        Jon
>>
>>        Jonathan Goodall
>>        Civil and Environmental Engineering
>>        University of South Carolina
>>
>> ------------------------------------------------------------------------
>>
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>>
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>>
>>
>>
>>
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-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Matthew B. Jones
Director of Informatics Research and Development
National Center for Ecological Analysis and Synthesis (NCEAS)
UC Santa Barbara
jones at nceas.ucsb.edu                       Ph: 1-907-523-1960
http://www.nceas.ucsb.edu/ecoinfo
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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