001    /* Copyright 2006-2009 the original author or authors.
002     *
003     * Licensed under the Apache License, Version 2.0 (the "License");
004     * you may not use this file except in compliance with the License.
005     * You may obtain a copy of the License at
006     *
007     *      http://www.apache.org/licenses/LICENSE-2.0
008     *
009     * Unless required by applicable law or agreed to in writing, software
010     * distributed under the License is distributed on an "AS IS" BASIS,
011     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012     * See the License for the specific language governing permissions and
013     * limitations under the License.
014     */
015    package org.codehaus.groovy.grails.plugins.springsecurity.facebook;
016    
017    import org.springframework.security.AuthenticationException;
018    
019    /**
020     * Used to tigger a redirect to the Facebook login page.
021     *
022     * @author <a href='mailto:beckwithb@studentsonly.com'>Burt Beckwith</a>
023     */
024    public class FacebookAuthenticationRequiredException extends AuthenticationException {
025    
026            private static final long serialVersionUID = -1162739729449839527L;
027    
028            /**
029             * Default constructor.
030             */
031            public FacebookAuthenticationRequiredException() {
032                    super("External Authentication Required");
033            }
034    }