/*
 * Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.springframework.security.authentication.jaas;

import javax.security.auth.login.LoginException;

import org.springframework.security.core.AuthenticationException;

/**
 * The JaasAuthenticationProvider takes an instance of LoginExceptionResolver to resolve
 * LoginModule specific exceptions to Spring Security <tt>AuthenticationException</tt>s.
 * For instance, a configured login module could throw a ScrewedUpPasswordException that
 * extends LoginException, in this instance the LoginExceptionResolver implementation
 * would return a
 * {@link org.springframework.security.authentication.BadCredentialsException}.
 *
 * @author Ray Krueger
 */
public interface LoginExceptionResolver {

	/**
	 * Translates a Jaas LoginException to an SpringSecurityException.
	 * @param ex The LoginException thrown by the configured LoginModule.
	 * @return The AuthenticationException that the JaasAuthenticationProvider should
	 * throw.
	 */
	AuthenticationException resolveException(LoginException ex);

}
