/*
 * 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
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 * 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
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 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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 * as provided by Sun in the GPL Version 2 section of the License file that
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 */
package de.ovgu.cs.frs.auth;

import java.util.logging.Level;

import com.sun.enterprise.security.LoginException;
import com.sun.enterprise.security.auth.login.PasswordLoginModule;

/**
 * This class implement a JDBC Login module for Glassfish. It is actually a "copy"
 * of {@link com.sun.enterprise.security.auth.login.JDBCLoginModule}
 */
public class JDBCLoginModule
	extends PasswordLoginModule
{
	/**
	 * Perform JDBC authentication. Delegates to JDBCRealm2.
	 * 
	 * @throws LoginException
	 *             If login fails (JAAS login() behavior).
	 */
	@Override
	protected void authenticate() throws LoginException {
		if ( ! (_currentRealm instanceof JDBCRealm2)) {
			String msg = sm.getString("jdbclm.badrealm");
			throw new LoginException(msg);
		}
		final JDBCRealm2 jdbcRealm = (JDBCRealm2) _currentRealm;
		// A JDBC user must have a name not null and non-empty.
		if ( (_username == null) || (_username.length() == 0)) {
			String msg = sm.getString("jdbclm.nulluser");
			throw new LoginException(msg);
		}
		String[] grpList = jdbcRealm.authenticate(_username, _password);
		if (grpList == null) { // JAAS behavior
			String msg = sm.getString("jdbclm.loginfail", _username);
			throw new LoginException(msg);
		}
		if (_logger.isLoggable(Level.FINEST)) {
			_logger.finest("JDBC login succeeded for: " + _username
				+ " groups:" + grpList);
		}
		// make a copy of groupList to pass to LoginModule. This copy is the one
		// that will be made null there. DO NOT PASS the grpList as is - as
		// it will get overwritten. Resulting in logins passing only once.
		final String[] groupListToForward = new String[grpList.length];
		System.arraycopy(grpList, 0, groupListToForward, 0, grpList.length);
		commitAuthentication(_username, _password, _currentRealm,
			groupListToForward);
	}
}