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        /** 
024          * This is the event class for notifications of changes to the 
025          * attributes of the servlet request in an application.
026          * @see ServletRequestAttributeListener
027          * @since  Servlet 2.4
028          */
029    
030    public class ServletRequestAttributeEvent extends ServletRequestEvent { 
031        private String name;
032        private Object value;
033    
034         /** Construct a ServletRequestAttributeEvent giving the servlet context
035          * of this web application, the ServletRequest whose attributes are
036          * changing and the name and value of the attribute.
037          *
038          * @param sc               the ServletContext that is sending the event.
039          * @param request          the ServletRequest that is sending the event.
040          * @param name             the name of the request attribute.
041          * @param value            the value of the request attribute.
042          */
043        public ServletRequestAttributeEvent(ServletContext sc, ServletRequest request, String name, Object value) {
044            super(sc, request);
045            this.name = name;
046            this.value = value;
047        }
048    
049        /**
050          * Return the name of the attribute that changed on the ServletRequest.
051          *
052          * @return         the name of the changed request attribute
053          */
054        public String getName() {
055            return this.name;
056        }
057    
058        /**
059          * Returns the value of the attribute that has been added, removed or 
060          * replaced. If the attribute was added, this is the value of the 
061          * attribute. If the attribute was removed, this is the value of the 
062          * removed attribute. If the attribute was replaced, this is the old 
063          * value of the attribute.
064          *
065          * @return         the value of the changed request attribute
066          */
067        public Object getValue() {
068            return this.value;   
069        }
070    }