package org.exolab.castor.mapping.loader.collection.handler;
   
   import java.util.Enumeration;
   
   import org.exolab.castor.mapping.CollectionHandler;
   import org.exolab.castor.mapping.loader.CollectionHandlers;
   
   public final class EnumerateCollectionHandler<T> implements CollectionHandler<T> {
     public Object add(Object collection, T object) {
      // -- do nothing, cannot add elements to an enumeration
      return null;
    }
  
    @SuppressWarnings("unchecked")
    public Enumeration<T> elements(Object collection) {
      if (collection == null)
        return new CollectionHandlers.EmptyEnumerator<T>();
      return ((Enumeration<T>) collection);
    }
  
    public int size(Object collection) {
      // -- Nothing we can do without destroying the enumeration
      return 0;
    }
  
    public Object clear(Object collection) {
      // -- Should we iterate over nextElement?
      return null;
    }
  
    public String toString() {
      return "Enumeration";
    }
  }