Source Code Cross Referenced for HttpSessionBindingEvent.java in  » Sevlet-Container » apache-tomcat-6.0.14 » javax » servlet » http » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Sevlet Container » apache tomcat 6.0.14 » javax.servlet.http 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         *
009:         *     http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:
018:        package javax.servlet.http;
019:
020:        /**
021:         *
022:         * Events of this type are either sent to an object that implements
023:         * {@link HttpSessionBindingListener} when it is bound or 
024:         * unbound from a session, or to a {@link HttpSessionAttributeListener} 
025:         * that has been configured in the deployment descriptor when any attribute is
026:         * bound, unbound or replaced in a session.
027:         *
028:         * <p>The session binds the object by a call to
029:         * <code>HttpSession.setAttribute</code> and unbinds the object
030:         * by a call to <code>HttpSession.removeAttribute</code>.
031:         *
032:         *
033:         *
034:         * @author		Various
035:         * @version		$Version$
036:         * 
037:         * @see 		HttpSession
038:         * @see 		HttpSessionBindingListener
039:         * @see			HttpSessionAttributeListener
040:         */
041:
042:        public class HttpSessionBindingEvent extends HttpSessionEvent {
043:
044:            /* The name to which the object is being bound or unbound */
045:
046:            private String name;
047:
048:            /* The object is being bound or unbound */
049:
050:            private Object value;
051:
052:            /**
053:             *
054:             * Constructs an event that notifies an object that it
055:             * has been bound to or unbound from a session. 
056:             * To receive the event, the object must implement
057:             * {@link HttpSessionBindingListener}.
058:             *
059:             *
060:             *
061:             * @param session 	the session to which the object is bound or unbound
062:             *
063:             * @param name 	the name with which the object is bound or unbound
064:             *
065:             * @see			#getName
066:             * @see			#getSession
067:             *
068:             */
069:
070:            public HttpSessionBindingEvent(HttpSession session, String name) {
071:                super (session);
072:                this .name = name;
073:            }
074:
075:            /**
076:             *
077:             * Constructs an event that notifies an object that it
078:             * has been bound to or unbound from a session. 
079:             * To receive the event, the object must implement
080:             * {@link HttpSessionBindingListener}.
081:             *
082:             *
083:             *
084:             * @param session 	the session to which the object is bound or unbound
085:             *
086:             * @param name 	the name with which the object is bound or unbound
087:             *
088:             * @see			#getName
089:             * @see			#getSession
090:             *
091:             */
092:
093:            public HttpSessionBindingEvent(HttpSession session, String name,
094:                    Object value) {
095:                super (session);
096:                this .name = name;
097:                this .value = value;
098:            }
099:
100:            /** Return the session that changed. */
101:            public HttpSession getSession() {
102:                return super .getSession();
103:            }
104:
105:            /**
106:             *
107:             * Returns the name with which the attribute is bound to or
108:             * unbound from the session.
109:             *
110:             *
111:             * @return		a string specifying the name with which
112:             *			the object is bound to or unbound from
113:             *			the session
114:             *
115:             *
116:             */
117:
118:            public String getName() {
119:                return name;
120:            }
121:
122:            /**
123:             * Returns the value of the attribute that has been added, removed or replaced.
124:             * If the attribute was added (or bound), this is the value of the attribute. If the attribute was
125:             * removed (or unbound), this is the value of the removed attribute. If the attribute was replaced, this
126:             * is the old value of the attribute.
127:             *
128:             * @since 2.3
129:             */
130:
131:            public Object getValue() {
132:                return this.value;
133:            }
134:
135:        }
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