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";
     }
  }