One screwup in my example code was in getting the Types needed for the
filtered iterator. It is bad to create dummy FS in the CAS just to get a
type object :(
Instead of
constraint.add((new Person(jcas)).getType());
use
constraint.add(jcas.getTypeSystem().getType("test.Person"));
Eddie
On Feb 4, 2008 7:30 PM, Eddie Epstein <[EMAIL PROTECTED]> wrote:
> Hi Isaac,
>
> There is a simpler way to do this. Using FilteredIterators you can limit
> an iterator to just returning types of interest. Using "type priorities" you
> can guarantee the order that types are returned for annotations with the
> same begin and end positions.
>
> Using both of these would allow a single pass iteration to eliminate
> unwanted type instances.
>
> In the CDE for your component, on the Indexes tab, add a priority list
> that puts Person in front of the other types. The resultant component
> descriptor would look like this:
>
> <typePriorities>
> <priorityList>
> <type>yourtype.Person</type>
> <type>yourtype.Organization</type>
> <type>yourtype.Company</type>
> ...
> </priorityList>
> </typePriorities>
>
>
> Some code below.
>
> FSIterator it = jcas.getAnnotationIndex().iterator();
> FSTypeConstraint constraint = cas.getConstraintFactory
> ().createTypeConstraint();
> constraint.add((new Person(jcas)).getType());
> constraint.add((new Organization(jcas)).getType());
> constraint.add((new Company(jcas)).getType());
> it = jcas.createFilteredIterator(it, constraint);
>
> it.moveToFirst();
> Annotation a = null;
> int pB = -1;
> int pE = -1;
> LinkedList<Annotation> toDel = new LinkedList<Annotation>();
> while (it.hasNext()) {
> a = (Annotation) it.get();
> it.moveToNext();
> if (a instanceof Person) {
> // grab position for testing subsequent FS
> pB = a.getBegin();
> pE = a.getEnd();
> }
> else {
> // not a Person; see if it has same position as the last
> Person
> if (pB == a.getBegin() && pE == a.getEnd()) {
> toDel.add(a);
> }
> }
> }
>
> // must modify index outside iterator loop
> for (int i = 0; i < toDel.size(); i++) {
> toDel.get(i).removeFromIndexes();
> }
>
>
> Regards,
> Eddie
>
>
