public DOMImplementationListImpl() 
{
        sources = new Vector();
}

 public  void add(DOMImplementation domImpl) 
{
        sources.add(domImpl);
}

Add a DOMImplementation in the list.

 public int getLength() 
{
        return sources.size();
}

The number of DOMImplementations in the list. The range of valid child node indices is 0 to length-1 inclusive.

 public DOMImplementation item(int index) 
{
       try {
           return (DOMImplementation) sources.elementAt(index);
       } catch (ArrayIndexOutOfBoundsException e) {
           return null;
       }
}

Returns the indexth item in the collection. If index is greater than or equal to the number of DOMImplementations in the list, this returns null.