Accessing upstream annotations in downstream C++ AE

[Johansson, Justin (Contractor)]

I have an upstream Java AE putting annotations in the CAS of type, say,
com.my.Foo.

In a downstream C++ annotator, one can get such annotations as instances
of AnnotationFS in C++ but not the as the specific type Foo.

My C++ process() code is along these lines ...

    CAS* pMyView = cas.getView( "MyView");

    if ( pMyView)
        {
        ANIndex fooIndex = pAudioView->getAnnotationIndex( m_fooType);

        if ( !fooIndex.isValid())
        {
            m_pAnnotatorContext->getLogger().logError( "Error getting
Foo index");
            return (TyErrorId) UIMA_ERR_RESMGR_INVALID_RESOURCE;
        }

        AnnotationFS foo = fooIndex.iterator().get();

        if ( !foo.isValid())
        {
            m_pAnnotatorContext->getLogger().logError( "Error getting
Foo FS");
            return (TyErrorId) UIMA_ERR_RESMGR_INVALID_RESOURCE;
        }

        // Problem: How to get Foo specific fields out of foo when it's
just an AnnotationFS?
        }

Observing that there is nothing like a JCasGen for producing C++ header
files for types, then there must be some other way of accessing the
annotations in C++.  Looking through the examples though gives me no
joy.

Could the list please enlighten me on this aspect of UIMA C++.

Thanks
Justin

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