package org.exolab.castor.mapping.loader.collection.handler;
   
   import java.util.Enumeration;
   import java.util.Vector;
   
   import org.exolab.castor.mapping.CollectionHandler;
   import org.exolab.castor.mapping.loader.CollectionHandlers;
   
   public final class VectorCollectionHandler<T> implements CollectionHandler<T> {
     
     @SuppressWarnings("unchecked")
     public Object add(Object collection, T object) {
        if (collection == null) {
           collection = new Vector<T>();
           ((Vector<T>) collection).addElement(object);
           return collection;
        }
        ((Vector<T>) collection).addElement(object);
        return null;
     }
  
     @SuppressWarnings("unchecked")
     public Enumeration<T> elements(Object collection) {
        if (collection == null)
           return new CollectionHandlers.EmptyEnumerator<T>();
        return ((Vector<T>) collection).elements();
     }
  
     @SuppressWarnings("unchecked")
     public int size(Object collection) {
        if (collection == null)
           return 0;
        return ((Vector<T>) collection).size();
     }
  
     @SuppressWarnings("unchecked")
     public Object clear(Object collection) {
        if (collection != null)
           ((Vector<T>) collection).removeAllElements();
        return null;
     }
  
     public String toString() {
        return "Vector";
     }
  }