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// ========================================================================
// Copyright (c) 2002-2009 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// The Eclipse Public License is available at 
// http://www.eclipse.org/legal/epl-v10.html
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// You may elect to redistribute this code under either of these licenses. 
// ========================================================================

package org.eclipse.jetty.plus.jaas;

import java.security.Principal;
import java.security.acl.Group;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;


public class JAASGroup implements Group 
{
    public static final String ROLES = "__roles__";
    
    private String _name = null;
    private HashSet _members = null;
    
    
   
    public JAASGroup(String n)
    {
        this._name = n;
        this._members = new HashSet();
    }
   
    /* ------------------------------------------------------------ */
    /**
     *
     * @param principal 
     * @return 
     */
    public synchronized boolean addMember(Principal principal)
    {
        return _members.add(principal);
    }

    /**
     *
     * @param principal 
     * @return 
     */
    public synchronized boolean removeMember(Principal principal)
    {
        return _members.remove(principal);
    }

    /**
     *
     * @param principal 
     * @return 
     */
    public boolean isMember(Principal principal)
    {
        return _members.contains(principal);
    }


    
    /**
     *
     * @return 
     */
    public Enumeration members()
    {

        class MembersEnumeration implements Enumeration
        {
            private Iterator itor;
            
            public MembersEnumeration (Iterator itor)
            {
                this.itor = itor;
            }
            
            public boolean hasMoreElements ()
            {
                return this.itor.hasNext();
            }


            public Object nextElement ()
            {
                return this.itor.next();
            }
            
        }

        return new MembersEnumeration (_members.iterator());
    }


    /**
     *
     * @return 
     */
    public int hashCode()
    {
        return getName().hashCode();
    }


    
    /**
     *
     * @param object 
          * @return 
     */
    public boolean equals(Object object)
    {
        if (! (object instanceof JAASGroup))
            return false;

        return ((JAASGroup)object).getName().equals(getName());
    }

    /**
     *
     * @return 
     */
    public String toString()
    {
        return getName();
    }

    /**
     *
     * @return 
     */
    public String getName()
    {
        
        return _name;
    }

}