CPE external parameters configuration

[Luigi Cosentino <lu...@exeura.com>]

Hi all,

I'm a new UIMA user. I'm developing a CPM able to process pdf documents. I
need to set some parameters for each analysis engine using the related
descriptor, and some other programmatically.
I'm not able to do this. In particular, I correctly set the parameters into
the AE descriptor, but when I write my code to set the parameters
programmatically I always obtain a NullPointerException.
In the following I post an example of the code I use:

    public void initialize(UimaContext context) throws
ResourceInitializationException
    {
        // Get the parameter representing a regular expression
        String regexp = (String) context.getConfigParameterValue("REG_EXP");
        ...
    }

In the CPM class I write the following code

    ...
    ResourceSpecifier aeSpecifier =
UIMAFramework.getXMLParser().parseResourceSpecifier(
                new XMLInputSource("myAnalysisEngineDescriptor.xml"));
    AnalysisEngine ae = UIMAFramework.produceAnalysisEngine(aeSpecifier);

ae.getMetaData().getConfigurationParameterSettings().setParameterValue("REG_EXP",
"myRegExp");

If the REG_EXP parameter has been declared in the AE descriptor, then I'm
able to set its value, else I obtain the NullPointerException when the
annotator use the regexp variable.
Note that I used ae.reconfigure() method, too, without any result.

Is it possible to solve this problem?

Regards.
Gg.

Re: CPE external parameters configuration

[Christoph Büscher <ch...@neofonie.de>]

Hi Luigi,

I think the call to UIMA.produceAnalysisEngine() will already implicitly call 
your annotators initialize() method and if you haven't set the value to a 
default in your XML decriptor, this will result in the NPE.

You could try to set a reasonable default value in the XML and then reconfigure 
it before using the AE. Or you could try to manipulate the ResourceSpecifier 
before creating the AE via the UIMAFramework. I remember that I tried this once 
but it was a bit awkward...

Hope this helps,

Christoph

Luigi Cosentino schrieb:
> Hi all,
> 
> I'm a new UIMA user. I'm developing a CPM able to process pdf documents. I
> need to set some parameters for each analysis engine using the related
> descriptor, and some other programmatically.
> I'm not able to do this. In particular, I correctly set the parameters into
> the AE descriptor, but when I write my code to set the parameters
> programmatically I always obtain a NullPointerException.
> In the following I post an example of the code I use:
> 
>     public void initialize(UimaContext context) throws
> ResourceInitializationException
>     {
>         // Get the parameter representing a regular expression
>         String regexp = (String) context.getConfigParameterValue("REG_EXP");
>         ...
>     }
> 
> In the CPM class I write the following code
> 
>     ...
>     ResourceSpecifier aeSpecifier =
> UIMAFramework.getXMLParser().parseResourceSpecifier(
>                 new XMLInputSource("myAnalysisEngineDescriptor.xml"));
>     AnalysisEngine ae = UIMAFramework.produceAnalysisEngine(aeSpecifier);
> 
> ae.getMetaData().getConfigurationParameterSettings().setParameterValue("REG_EXP",
> "myRegExp");
> 
> If the REG_EXP parameter has been declared in the AE descriptor, then I'm
> able to set its value, else I obtain the NullPointerException when the
> annotator use the regexp variable.
> Note that I used ae.reconfigure() method, too, without any result.
> 
> Is it possible to solve this problem?
> 
> Regards.
> Gg.
>