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    
015    package org.apache.tapestry.services.impl;
016    
017    import javax.servlet.http.Cookie;
018    import javax.servlet.http.HttpServletRequest;
019    import javax.servlet.http.HttpServletResponse;
020    
021    import 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     */
029    public class CookieSourceImpl implements CookieSource
030    {
031        private HttpServletRequest _request;
032    
033        private HttpServletResponse _response;
034    
035        public String readCookieValue(String name)
036        {
037            Cookie[] cookies = _request.getCookies();
038    
039            if (cookies == null)
040                return null;
041    
042            for (int i = 0; i < cookies.length; i++)
043            {
044                if (cookies[i].getName().equals(name))
045                    return cookies[i].getValue();
046            }
047    
048            return null;
049        }
050    
051        public void writeCookieValue(String name, String value)
052        {
053            Cookie cookie = new Cookie(name, value);
054            cookie.setPath(_request.getContextPath() + "/");
055    
056            _response.addCookie(cookie);
057        }
058    
059        public void removeCookieValue(String name)
060        {
061            Cookie cookie = new Cookie(name, null);
062            cookie.setPath(_request.getContextPath() + "/");
063            cookie.setMaxAge(0);
064    
065            _response.addCookie(cookie);
066        }
067    
068        public void setRequest(HttpServletRequest request)
069        {
070            _request = request;
071        }
072    
073        public void setResponse(HttpServletResponse response)
074        {
075            _response = response;
076        }
077    }