How to use

getFullNonNullElements

method

in

org.apache.commons.collections.collection.AbstractTestCollection

/**
 *  Returns an array of objects that are contained in a collection
 *  produced by {@link #makeFullCollection()}.  Every element in the
 *  returned array <I>must</I> be an element in a full collection.<P>
 *  The default implementation returns a heterogenous array of 
 *  objects with some duplicates. null is added if allowed.
 *  Override if you require specific testing elements.  Note that if you
 *  override {@link #makeFullCollection()}, you <I>must</I> override
 *  this method to reflect the contents of a full collection.
 */
public Object[] getFullElements() {
  if (isNullSupported()) {
    ArrayList list = new ArrayList();
    list.addAll(Arrays.asList(getFullNonNullElements()));
    list.add(4, null);
    return list.toArray();
  } else {
    return (Object[]) getFullNonNullElements().clone();
  }
}