Examples of org.apache.uima.cas.FeaturePath

org.apache.uima.cas.FeaturePath
Interface for a feature path. A feature path is a sequence of features. The feature path can either be initialized using the addFeature() or the initialize() method. To initialize and check the feature path for a desired type call typeInit(). After these calls the feature path value can be extracted using the provided getter methods.

The feature path elements are separated by "/". So a valid feature path is /my/feature/path.

The feature path syntax also allows some built-in functions on the last feature path element. Built-in functions are added with a ":" followed by the function name. E.g. "/my/path:fsId()". The allowed built-in functions are:
- coveredText()
- fsId()
- typeName()
Built-in functions are only evaluated if getValueAsString() is called.

      String lemma = "the";
      // create filtered iterator over Tokens of type 1
      FSIterator it = cas.getAnnotationIndex(tokenType).iterator();
      FSStringConstraint type1Constraint = cas.getConstraintFactory().createStringConstraint();
      type1Constraint.equals(lemma);
      FeaturePath path = cas.createFeaturePath();
      path.addFeature(lemmaFeat);
      FSMatchConstraint cons = cas.getConstraintFactory().embedConstraint(path, type1Constraint);
      it = cas.createFilteredIterator(it, cons);


      int count = 0;
      for (it.moveToFirst(); it.isValid(); it.moveToNext()) {

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    Iterator<Type> it = ts.getTypeIterator();
    //Type annotationType = ts.getType(Annotation.class.getName()); // this returns "org.apache.uima.tcas.Annotation" which isn't in type system
    Type annotationType = ts.getType("uima.tcas.Annotation"); // should be safe to hard code this
    //System.err.println("annotation type: " + annotationType);
    Feature sentenceBeginFeature = annotationType.getFeatureByBaseName("begin");
    FeaturePath sentenceBeginFeaturePath = jcas.createFeaturePath();
    sentenceBeginFeaturePath.addFeature(sentenceBeginFeature);
    
    Feature sentenceEndFeature = annotationType.getFeatureByBaseName("end");
    FeaturePath sentenceEndFeaturePath = jcas.createFeaturePath();
    sentenceEndFeaturePath.addFeature(sentenceEndFeature);
    
    FSMatchConstraint beginAndEnd = constructConstraintByBeginEnd(
        problemBegin, problemEnd, cf, sentenceBeginFeaturePath,
        sentenceEndFeaturePath);

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