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package org.apache.naming.resources;

import java.util.Vector;
import java.util.Enumeration;
import javax.naming.NamingException;
import javax.naming.NamingEnumeration;

/**
 * Naming enumeration implementation.
 *
 * @author Remy Maucherat
 * @version $Revision: 1.1.2.1 $ $Date: 2007/08/17 15:46:28 $
 */

public class RecyclableNamingEnumeration 
    implements NamingEnumeration {


    // ----------------------------------------------------------- Constructors


    public RecyclableNamingEnumeration(Vector entries) {
        this.entries = entries;
        recycle();
    }


    // -------------------------------------------------------------- Variables


    /**
     * Entries.
     */
    protected Vector entries;


    /**
     * Underlying enumeration.
     */
    protected Enumeration enumeration;


    // --------------------------------------------------------- Public Methods


    /**
     * Retrieves the next element in the enumeration.
     */
    public E next()
        throws NamingException {
        return nextElement();
    }


    /**
     * Determines whether there are any more elements in the enumeration.
     */
    public boolean hasMore()
        throws NamingException {
        return enumeration.hasMoreElements();
    }


    /**
     * Closes this enumeration.
     */
    public void close()
        throws NamingException {
    }


    public boolean hasMoreElements() {
        return enumeration.hasMoreElements();
    }


    public E nextElement() {
        return enumeration.nextElement();
    }


    // -------------------------------------------------------- Package Methods


    /**
     * Recycle.
     */
    void recycle() {
        enumeration = entries.elements();
    }


}