001// Copyright 2005 The Apache Software Foundation 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 015package org.apache.tapestry.web; 016 017import java.util.List; 018 019import javax.servlet.http.HttpSession; 020 021import org.apache.hivemind.util.Defense; 022import org.apache.tapestry.describe.DescriptionReceiver; 023 024/** 025 * Adapts {@link javax.servlet.http.HttpSession} as 026 * {@link org.apache.tapestry.web.WebSession}. 027 * 028 * @author Howard M. Lewis Ship 029 * @since 4.0 030 */ 031public class ServletWebSession implements WebSession 032{ 033 private final HttpSession _httpSession; 034 035 public ServletWebSession(HttpSession session) 036 { 037 Defense.notNull(session, "session"); 038 039 _httpSession = session; 040 } 041 042 public void describeTo(DescriptionReceiver receiver) 043 { 044 receiver.describeAlternate(_httpSession); 045 } 046 047 public List getAttributeNames() 048 { 049 return WebUtils.toSortedList(_httpSession.getAttributeNames()); 050 } 051 052 public Object getAttribute(String name) 053 { 054 return _httpSession.getAttribute(name); 055 } 056 057 public void setAttribute(String name, Object attribute) 058 { 059 if (attribute == null) 060 _httpSession.removeAttribute(name); 061 else 062 _httpSession.setAttribute(name, attribute); 063 } 064 065 public String getId() 066 { 067 return _httpSession.getId(); 068 } 069 070 public boolean isNew() 071 { 072 return _httpSession.isNew(); 073 } 074 075 public void invalidate() 076 { 077 _httpSession.invalidate(); 078 } 079}