Method retainAll

src/main/java/gate/relations/RelationSet.java:612–628

(Collection<?> relations)

  }

  @Override
  public boolean retainAll(Collection<?> relations) {
    boolean modified = false;

    Iterator<Relation> it = iterator();
    while(it.hasNext()) {
      Relation r = it.next();

      if(!relations.contains(r)) {
        //deleteRelation(r);
        it.remove();
        modified = true;
      }
    }

    return modified;
  }

  @Override
  public Object[] toArray() {