/*
 * Copyright (C) 2005 Alfresco, Inc.
 *
 * Licensed under the Mozilla Public License version 1.1 
 * with a permitted attribution clause. You may obtain a
 * copy of the License at
 *
 *   http://www.alfresco.org/legal/license.txt
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the
 * License.
 */
package org.alfresco.repo.security.authentication;

import net.sf.acegisecurity.Authentication;
import net.sf.acegisecurity.AuthenticationException;
import net.sf.acegisecurity.providers.AuthenticationProvider;

public class AuthenticatedAuthenticationPassthroughProvider implements AuthenticationProvider
{

    public AuthenticatedAuthenticationPassthroughProvider()
    {
        super();
    }

    public Authentication authenticate(Authentication authentication) throws AuthenticationException
    {
        if (!supports(authentication.getClass())) {
            return null;
        }
        if(authentication.isAuthenticated())
        {
            return authentication;
        }
        else
        {
            return null;
        }
    }

    public boolean supports(Class authentication)
    {
        return (Authentication.class.isAssignableFrom(authentication));
    }

}