001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.util.servlet;
016    
017    import com.liferay.portal.kernel.util.ListUtil;
018    import com.liferay.portal.kernel.util.StringPool;
019    import com.liferay.util.PwdGenerator;
020    
021    import java.util.Collections;
022    import java.util.Enumeration;
023    import java.util.HashMap;
024    import java.util.List;
025    import java.util.Map;
026    
027    import javax.servlet.ServletContext;
028    import javax.servlet.http.HttpSession;
029    
030    /**
031     * @author Brian Wing Shun Chan
032     */
033    public class NullSession implements HttpSession {
034    
035            public NullSession() {
036                    _attributes = new HashMap<String, Object>();
037                    _creationTime = System.currentTimeMillis();
038                    _id =
039                            NullSession.class.getName() + StringPool.POUND +
040                                    PwdGenerator.getPinNumber();
041                    _lastAccessedTime = _creationTime;
042                    _maxInactiveInterval = 0;
043                    _servletContext = null;
044                    _new = true;
045            }
046    
047            public Object getAttribute(String name) {
048                    return _attributes.get(name);
049            }
050    
051            public Enumeration<String> getAttributeNames() {
052                    return Collections.enumeration(_attributes.keySet());
053            }
054    
055            public long getCreationTime() {
056                    return _creationTime;
057            }
058    
059            public String getId() {
060                    return _id;
061            }
062    
063            public long getLastAccessedTime() {
064                    return _lastAccessedTime;
065            }
066    
067            public int getMaxInactiveInterval() {
068                    return _maxInactiveInterval;
069            }
070    
071            public ServletContext getServletContext() {
072                    return _servletContext;
073            }
074    
075            /**
076             * @deprecated
077             */
078            public javax.servlet.http.HttpSessionContext getSessionContext() {
079                    return null;
080            }
081    
082            public Object getValue(String name) {
083                    return getAttribute(name);
084            }
085    
086            public String[] getValueNames() {
087                    List<String> names = ListUtil.fromEnumeration(getAttributeNames());
088    
089                    return names.toArray(new String[0]);
090            }
091    
092            public void invalidate() {
093                    _attributes.clear();
094            }
095    
096            public boolean isNew() {
097                    return _new;
098            }
099    
100            public void putValue(String name, Object value) {
101                    setAttribute(name, value);
102            }
103    
104            public void removeAttribute(String name) {
105                    _attributes.remove(name);
106            }
107    
108            public void removeValue(String name) {
109                    removeAttribute(name);
110            }
111    
112            public void setAttribute(String name, Object value) {
113                    _attributes.put(name, value);
114            }
115    
116            public void setMaxInactiveInterval(int maxInactiveInterval) {
117                    _maxInactiveInterval = maxInactiveInterval;
118            }
119    
120            private Map<String, Object> _attributes;
121            private long _creationTime;
122            private String _id;
123            private long _lastAccessedTime;
124            private int _maxInactiveInterval;
125            private ServletContext _servletContext;
126            private boolean _new;
127    
128    }