exo2/ListExtension.java

   1 import java.util.List;
   2 import java.util.ListIterator;
   3
   4 public class ListExtension<E> {
   5     private List<E> list;
   6
   7     public ListExtension() {
   8         setList(null);
   9     }
  10
  11     public ListExtension(List<E> l) {
  12         setList(l);
  13     }
  14
  15     /**
  16      * [setList description]
  17      * @param l [description]
  18      */
  19     public void setList(List<E> l) {
  20         list = l;
  21     }
  22
  23     /**
  24      * [getList description]
  25      * @return [description]
  26      */
  27     public List<E> getList() {
  28         return list;
  29     }
  30
  31     public boolean add(E e) {
  32         return list.add(e);
  33     }
  34
  35     public int size() {
  36         return list.size();
  37     }
  38
  39     /**
  40      * Should mimic the List<E> add(int index, E value) method
  41      * @param index [description]
  42      * @param value [description]
  43      * @return      [description]
  44      */
  45     public void addIter(int index, E value) {
  46         ListIterator<E> iter = list.listIterator();
  47         int i = 0;
  48         // go to the element at index + 1
  49         while (iter.hasNext() && i <= index) {
  50             iter.next();
  51             i++;
  52         }
  53         iter.add(value);
  54     }
  55
  56     //FIXME: replace parameter by the list of objects to add
  57     public void addNelements(int index, int Nelements) {
  58         ListIterator<E> iter = list.listIterator();
  59         int i = 0;
  60         // go to the element at index + 1
  61         while (iter.hasNext() && i <= index) {
  62             iter.next();
  63             i++;
  64         }
  65         for (int j = 0; j < Nelements; j++) {
  66             iter.add((E)new Object());
  67         }
  68     }
  69
  70 }