001// Copyright 2006, 2007, 2008, 2009, 2011 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.tapestry5.internal.services;
016
017import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
018import org.apache.tapestry5.ioc.internal.util.InternalUtils;
019import org.apache.tapestry5.services.Session;
020import org.apache.tapestry5.services.SessionPersistedObjectAnalyzer;
021
022import javax.servlet.http.HttpServletRequest;
023import javax.servlet.http.HttpSession;
024import java.util.Collections;
025import java.util.Enumeration;
026import java.util.List;
027import java.util.Map;
028
029/**
030 * A thin wrapper around {@link HttpSession}.
031 */
032public class SessionImpl implements Session
033{
034    private final HttpServletRequest request;
035    private final HttpSession session;
036
037    private boolean invalidated = false;
038
039    public SessionImpl(HttpServletRequest request, HttpSession session)
040    {
041        this.request = request;
042        this.session = session;
043    }
044
045    public Object getAttribute(String name)
046    {
047        return session.getAttribute(name);
048    }
049
050    public List<String> getAttributeNames()
051    {
052        return InternalUtils.toList(session.getAttributeNames());
053    }
054
055    public void setAttribute(String name, Object value)
056    {
057        session.setAttribute(name, value);
058    }
059
060    public List<String> getAttributeNames(String prefix)
061    {
062        List<String> result = CollectionFactory.newList();
063
064        Enumeration e = session.getAttributeNames();
065        while (e.hasMoreElements())
066        {
067            String name = (String) e.nextElement();
068
069            if (name.startsWith(prefix)) result.add(name);
070        }
071
072        Collections.sort(result);
073
074        return result;
075    }
076
077    public int getMaxInactiveInterval()
078    {
079        return session.getMaxInactiveInterval();
080    }
081
082    public void invalidate()
083    {
084        invalidated = true;
085
086        session.invalidate();
087    }
088
089    public boolean isInvalidated()
090    {
091        if (invalidated) return true;
092
093        // The easy case is when the session was invalidated through the Tapestry Session
094        // object. The hard case is when the HttpSession was invalidated outside of Tapestry,
095        // in which case, request.getSession() will return a new HttpSession instance (or null)
096
097        invalidated = request.getSession(false) != session;
098
099        return invalidated;
100    }
101
102    public void setMaxInactiveInterval(int seconds)
103    {
104        session.setMaxInactiveInterval(seconds);
105    }
106
107    public void restoreDirtyObjects()
108    {
109
110    }
111}