| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 |
| * |
| * http://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.apache.commons.chain.web.servlet; |
| |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Enumeration; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import javax.servlet.http.HttpSession; |
| import javax.servlet.http.HttpServletRequest; |
| import org.apache.commons.chain.web.MapEntry; |
| |
| |
| /** |
| * <p>Private implementation of <code>Map</code> for HTTP session |
| * attributes.</p> |
| * |
| * @author Craig R. McClanahan |
| * @version $Revision$ $Date$ |
| */ |
| |
| final class ServletSessionScopeMap implements Map { |
| |
| |
| public ServletSessionScopeMap(HttpServletRequest request) { |
| this.request = request; |
| sessionExists(); |
| } |
| |
| |
| private HttpSession session = null; |
| private HttpServletRequest request = null; |
| |
| |
| public void clear() { |
| if (sessionExists()) { |
| Iterator keys = keySet().iterator(); |
| while (keys.hasNext()) { |
| session.removeAttribute((String) keys.next()); |
| } |
| } |
| } |
| |
| |
| public boolean containsKey(Object key) { |
| if (sessionExists()) { |
| return (session.getAttribute(key(key)) != null); |
| } else { |
| return false; |
| } |
| } |
| |
| |
| public boolean containsValue(Object value) { |
| if (value == null || !sessionExists()) { |
| return (false); |
| } |
| Enumeration keys = session.getAttributeNames(); |
| while (keys.hasMoreElements()) { |
| Object next = session.getAttribute((String) keys.nextElement()); |
| if (value.equals(next)) { |
| return (true); |
| } |
| } |
| return (false); |
| } |
| |
| |
| public Set entrySet() { |
| Set set = new HashSet(); |
| if (sessionExists()) { |
| Enumeration keys = session.getAttributeNames(); |
| String key; |
| while (keys.hasMoreElements()) { |
| key = (String) keys.nextElement(); |
| set.add(new MapEntry(key, session.getAttribute(key), true)); |
| } |
| } |
| return (set); |
| } |
| |
| |
| public boolean equals(Object o) { |
| if (sessionExists()) { |
| return (session.equals(o)); |
| } else { |
| return false; |
| } |
| } |
| |
| |
| public Object get(Object key) { |
| if (sessionExists()) { |
| return (session.getAttribute(key(key))); |
| } else { |
| return null; |
| } |
| } |
| |
| |
| public int hashCode() { |
| if (sessionExists()) { |
| return (session.hashCode()); |
| } else { |
| return 0; |
| } |
| } |
| |
| |
| public boolean isEmpty() { |
| if (sessionExists() && |
| session.getAttributeNames().hasMoreElements()) { |
| return false; |
| } else { |
| return true; |
| } |
| } |
| |
| |
| public Set keySet() { |
| Set set = new HashSet(); |
| if (sessionExists()) { |
| Enumeration keys = session.getAttributeNames(); |
| while (keys.hasMoreElements()) { |
| set.add(keys.nextElement()); |
| } |
| } |
| return (set); |
| } |
| |
| |
| public Object put(Object key, Object value) { |
| if (value == null) { |
| return (remove(key)); |
| } |
| |
| // Ensure the Session is created, if it |
| // doesn't exist |
| if (session == null) { |
| session = request.getSession(); |
| request = null; |
| } |
| |
| String skey = key(key); |
| Object previous = session.getAttribute(skey); |
| session.setAttribute(skey, value); |
| return (previous); |
| } |
| |
| |
| public void putAll(Map map) { |
| Iterator keys = map.keySet().iterator(); |
| while (keys.hasNext()) { |
| Object key = keys.next(); |
| put(key, map.get(key)); |
| } |
| } |
| |
| |
| public Object remove(Object key) { |
| if (sessionExists()) { |
| String skey = key(key); |
| Object previous = session.getAttribute(skey); |
| session.removeAttribute(skey); |
| return (previous); |
| } else { |
| return (null); |
| } |
| } |
| |
| |
| public int size() { |
| int n = 0; |
| if (sessionExists()) { |
| Enumeration keys = session.getAttributeNames(); |
| while (keys.hasMoreElements()) { |
| keys.nextElement(); |
| n++; |
| } |
| } |
| return (n); |
| } |
| |
| |
| public Collection values() { |
| List list = new ArrayList(); |
| if (sessionExists()) { |
| Enumeration keys = session.getAttributeNames(); |
| while (keys.hasMoreElements()) { |
| list.add(session.getAttribute((String) keys.nextElement())); |
| } |
| } |
| return (list); |
| } |
| |
| |
| private String key(Object key) { |
| if (key == null) { |
| throw new IllegalArgumentException(); |
| } else if (key instanceof String) { |
| return ((String) key); |
| } else { |
| return (key.toString()); |
| } |
| } |
| |
| private boolean sessionExists() { |
| if (session == null) { |
| session = request.getSession(false); |
| if (session != null) { |
| request = null; |
| } |
| } |
| if (session != null) { |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| } |