/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 * 
 * Contributor(s):
 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.enterprise.security.auth.login;

import com.sun.appserv.security.AppservPasswordLoginModule;
import com.sun.enterprise.security.auth.realm.Realm;
import javax.security.auth.login.LoginException;

/**
 * Abstract base class for password-based login modules.
 * Newer implementations should extend
 * com.sun.appserv.security.AbstractLoginModule. This class is provided for
 * backward compatibility and is a candidate for deprecation.
 *
 */
public abstract class PasswordLoginModule extends AppservPasswordLoginModule
{

    /**
     * Maintain RI compatibility.
     *
     * <P>This is a convenience method which can be used by subclasses
     * to complete the steps required by RI legacy authentication code.
     * Most of this should go away if a clean JAAS/Subject based
     * infrastructure is provided. But for now this must be done.
     *
     * <P>Note that this method is called after the authentication
     * has succeeded. If authentication failed do not call this method.
     * 
     * <P>A lot of the RI behavior is still present here. Some of the
     * most notable points to remember:
     * <ul>
     *  <li>Global instance field succeeded is set to true by this method.
     *
     * @param username Name of authenticated user.
     * @param password Password of this user.
     * @param theRealm Current Realm object for this authentication.
     * @param groups String array of group memberships for user (could be
     *     empty). 
     * @returns void
     *
     */
    public final void commitAuthentication(String username,
                                        String password,
                                        Realm theRealm,
                                        String[] groups)
    {
        commitUserAuthentication(groups);
    }
    /**
     * Older implementations can implement authenticate. While new implementation
     * calls authenticateUser
     * @throws LoginException
     */
    protected final void authenticateUser () throws LoginException{
        authenticate();
    }

    /**
     * Perform authentication decision.
     * Method returns silently on success and returns a LoginException
     * on failure.
     * To be implmented by sub-classes
     * @return void authenticate returns silently on successful authentication.
     * @throws com.sun.enterprise.security.LoginException on authentication failure.
     *
     */
    abstract protected void authenticate()
        throws LoginException;
}