Example #1
1
 @Override
 default <U> Tree<Tuple2<T, U>> zipAll(Iterable<U> that, T thisElem, U thatElem) {
   Objects.requireNonNull(that, "that is null");
   if (isEmpty()) {
     return Iterator.ofAll(that).map(elem -> Tuple.of(thisElem, elem)).toTree();
   } else {
     final java.util.Iterator<U> thatIter = that.iterator();
     final Tree<Tuple2<T, U>> tree = ZipAll.apply((Node<T>) this, thatIter, thatElem);
     if (thatIter.hasNext()) {
       final Iterable<Node<Tuple2<T, U>>> remainder =
           Iterator.ofAll(thatIter).map(elem -> Tree.of(Tuple.of(thisElem, elem)));
       return new Node<>(tree.getValue(), tree.getChildren().appendAll(remainder));
     } else {
       return tree;
     }
   }
 }
Example #2
0
 @SuppressWarnings("unchecked")
 static <T, U> Tree<U> apply(
     Node<T> node, Function<? super T, ? extends Iterable<? extends U>> mapper) {
   final Tree<U> mapped = Tree.ofAll(mapper.apply(node.getValue()));
   if (mapped.isEmpty()) {
     return Tree.empty();
   } else {
     final List<Node<U>> children =
         (List<Node<U>>)
             (Object)
                 node.getChildren()
                     .map(child -> FlatMap.apply(child, mapper))
                     .filter(Tree::isDefined);
     return Tree.of(mapped.getValue(), children.prependAll(mapped.getChildren()));
   }
 }