001// Copyright 2004, 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.services.impl;
016
017import javax.servlet.http.Cookie;
018import javax.servlet.http.HttpServletRequest;
019import javax.servlet.http.HttpServletResponse;
020
021import org.apache.tapestry.services.CookieSource;
022
023/**
024 * Implementation of the {@link org.apache.tapestry.services.CookieSource}service interface.
025 * 
026 * @author Howard Lewis Ship
027 * @since 4.0
028 */
029public class CookieSourceImpl implements CookieSource
030{
031    private HttpServletRequest _request;
032
033    private HttpServletResponse _response;
034
035    private int _defaultMaxAge;
036
037    public String readCookieValue(String name)
038    {
039        Cookie[] cookies = _request.getCookies();
040
041        if (cookies == null)
042            return null;
043
044        for (int i = 0; i < cookies.length; i++)
045        {
046            if (cookies[i].getName().equals(name))
047                return cookies[i].getValue();
048        }
049
050        return null;
051    }
052
053    public void writeCookieValue(String name, String value)
054    {
055        writeCookieValue(name, value, _defaultMaxAge);
056    }
057
058    public void writeCookieValue(String name, String value, int maxAge)
059    {
060        Cookie cookie = new Cookie(name, value);
061        cookie.setPath(_request.getContextPath() + "/");
062        cookie.setMaxAge(maxAge);
063
064        _response.addCookie(cookie);
065    }
066
067    public void removeCookieValue(String name)
068    {
069        Cookie cookie = new Cookie(name, null);
070        cookie.setPath(_request.getContextPath() + "/");
071        cookie.setMaxAge(0);
072
073        _response.addCookie(cookie);
074    }
075
076    public void setRequest(HttpServletRequest request)
077    {
078        _request = request;
079    }
080
081    public void setResponse(HttpServletResponse response)
082    {
083        _response = response;
084    }
085
086    public void setDefaultMaxAge(int defaultMaxAge)
087    {
088        _defaultMaxAge = defaultMaxAge;
089    }
090}