Hi Stephan,
let's see if I can help you out here.
1) For a resource with parameters set statically in the descriptor, your
resource should extend
from Resource_ImplBase (implements DataResource).
2) For a resource that needs to load data from aURL, you resource class can be
anything and
implement SharedResourceObject. It's also possible to set parameters
statically in the
descriptor (see below).
3) If you do not know the values of the parameters at the time you write the
descriptor, then
you need to use a ParameterizedDataResource. You can get an instance of such
a resource
within your AE using
getContext().getResourceObject("theResource", new String[] { param1,
param2, param3... }).
Resources of the type 1 and 2 are instantiated when the pipeline components are
instantiated.
The type 3 resource is instantiated when you try to access it using
getResourceObject().
Now to the descriptors that we use for the different types in uimaFIT:
1) CustomResourceSpecifier
2) FileResourceSpecifier (if the resource does not need parameters), otherwise
ConfigurableDataResourceSpecifier
3) CustomResourceSpecifier
If you are not bound to using XML descriptors, you might want to have a look at
uimaFIT
for programmatically creating component and resource descriptions. Here a
little example
binding an external resource to two different AEs:
ExternalResourceDescription extDesc = createExternalResourceDescription(
SharedModel.class, new File("somemodel.bin"));
// Binding external resource to each Annotator individually
AnalysisEngineDescription aed1 = createPrimitiveDescription(Annotator.class,
Annotator.MODEL_KEY, extDesc);
AnalysisEngineDescription aed2 = createPrimitiveDescription(Annotator.class,
Annotator.MODEL_KEY, extDesc);
// Process something with the two AEs
AnalysisEngineDescription aaed = createAggregateDescription(aed1, aed2);
AnalysisEngine ae = createAggregate(aaed);
ae.process(ae.newJCas());
(Source: http://code.google.com/p/uimafit/wiki/uimaFitResources)
Cheers,
-- Richard
Am 16.03.2012 um 21:00 schrieb Stephan Greene:
> Well, to answer my own question, I see that I can set a
> CustomResourceSpecifier by editing my descriptor xml directly (thanks to a
> post by Adam Lally in 2008;
> http://www.mail-archive.com/[email protected]/msg01437.html )
>
> I have this now:
>
> <externalResource>
> <name>theResource</name>
> <description>my resource</description>
> <customResourceSpecifier>
>
> <resourceClassName>com.my.resourcemanagers.MyDataResource</resourceClassName>
> <parameters>
> <parameter name="param1" value="paramval1"/>
> <parameter name="param2" value="paramval2"/>
> </parameters>
> </customResourceSpecifier>
> </externalResource>
>
>
> I then implemented as
>
> public class MyDataResource extends Resource_ImplBase implements
> ParameterizedDataResource, DataResource, SharedResourceObject
>
> This actually works and does what I want. But I suspect I'm not really using
> the framework correctly. Does anyone knows the canonical way to use these
> various Resource classes?
>
>
> Stephan
>
> On Mar 16, 2012, at 12:30 PM, Stephan Greene wrote:
>
>> I am implementing a SharedResourceObject which requires a DataResource more
>> involved than just a url to access the data the resource represents. I need
>> something like the ParameterizedDataResource -- but I don't see how to
>> instantiate this. The load() method of SharedResourceObject takes a
>> DataResource object parameter. How do I configure my SharedResourceObject to
>> use some other kind of DataResource? I know how to implement the data
>> resource I need, but I can't figure out how to tell the framework that I
>> want to use my own data resource with my own SharedResourceObject.
>>
>> Does it involve a CustomResourceSpecifier? I can't figure out how to use
>> that, either. Any help appreciated.
>>
>> Stephan
--
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Richard Eckart de Castilho
Technical Lead
Ubiquitous Knowledge Processing Lab (UKP-TUD)
FB 20 Computer Science Department
Technische Universität Darmstadt
Hochschulstr. 10, D-64289 Darmstadt, Germany
phone [+49] (0)6151 16-7477, fax -5455, room S2/02/B117
[email protected]
www.ukp.tu-darmstadt.de
Web Research at TU Darmstadt (WeRC) www.werc.tu-darmstadt.de
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