001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *  http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    package javax.servlet;
021    
022    /**
023     * This is the event class for notifications about changes to the attributes of the
024     * servlet context of a web application.
025     *
026     * @version $Rev: 788194 $ $Date: 2009-06-24 18:05:48 -0400 (Wed, 24 Jun 2009) $
027     * @see ServletContextAttributeListener
028     * @since v 2.3
029     */
030    
031    public class ServletContextAttributeEvent extends ServletContextEvent {
032        private final String name;
033        private final Object value;
034    
035        /**
036         * Construct a ServletContextAttributeEvent from the given context for the
037         * given attribute name and attribute value.
038         */
039        public ServletContextAttributeEvent(ServletContext source, String name, Object value) {
040            super(source);
041            this.name = name;
042            this.value = value;
043        }
044    
045        /**
046         * Return the name of the attribute that changed on the ServletContext.
047         * @return name of the changed attribute
048         */
049        public String getName() {
050            return name;
051        }
052    
053        /**
054         * Returns the value of the attribute that has been added, removed, or replaced.
055         * If the attribute was added, this is the value of the attribute. If the attribute was
056         * removed, this is the value of the removed attribute. If the attribute was replaced, this
057         * is the old value of the attribute.
058         * @return value of the changed attribute
059         */
060        public Object getValue() {
061            return value;
062        }
063    }
064