001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.messaging.webapp;
023
024import java.util.Collections;
025import java.util.Enumeration;
026import java.util.HashMap;
027import java.util.Locale;
028import java.util.Map;
029
030import javax.servlet.http.HttpServletRequest;
031import javax.servlet.http.HttpServletRequestWrapper;
032
033/**
034 * @author Venkat DANDA
035 */
036@SuppressWarnings({ "unchecked", "rawtypes" })
037public class HttpServletRequestParamWrapper extends HttpServletRequestWrapper {
038    
039    private final Locale locale;
040    private final Enumeration<Locale> locales;
041    private final Map requestParams;
042    private final Map requestAttributes;
043
044    /**
045     * @param request
046     */
047    public HttpServletRequestParamWrapper(HttpServletRequest request) {
048        super(request);
049        this.locale = request.getLocale();
050        this.locales = request.getLocales();
051        this.requestParams = new HashMap(request.getParameterMap());
052        this.requestAttributes = new HashMap();
053    }
054
055    /* (non-Javadoc)
056     * @see javax.servlet.ServletRequestWrapper#getParameter(java.lang.String)
057     */
058    @Override
059    public String getParameter(String name) {
060        String retValue = null;
061        String[] paramValues = getParameterValues(name);
062        if (paramValues != null && paramValues.length > 0) {
063            retValue = paramValues[0];
064        }
065        return retValue;
066    }
067
068    /* (non-Javadoc)
069     * @see javax.servlet.ServletRequestWrapper#getParameterMap()
070     */
071    @Override
072    public Map getParameterMap() {
073        return Collections.unmodifiableMap(requestParams);
074    }
075
076    /* (non-Javadoc)
077     * @see javax.servlet.ServletRequestWrapper#getParameterNames()
078     */
079    @Override
080    public Enumeration getParameterNames() {
081        return Collections.enumeration(requestParams.keySet());
082    }
083
084    /* (non-Javadoc)
085     * @see javax.servlet.ServletRequestWrapper#getParameterValues(java.lang.String)
086     */
087    @Override
088    public String[] getParameterValues(String name) {
089        String[] retValues = null;
090        String[] tmpValues = (String[]) requestParams.get(name);
091        if (tmpValues != null) {
092            retValues = new String[tmpValues.length];
093            System.arraycopy(tmpValues, 0, retValues, 0, tmpValues.length);
094        }
095        return retValues;
096    }
097
098    /**
099     * New method to set the parameter value.
100     * @param name
101     * @param value
102     */
103    public void setParameter(String name, String value) {
104        String[] param = { value };
105        setParameter(name, param);
106    }
107
108    /**
109     * New method to set the parameter with multiple values.
110     * @param name
111     * @param values
112     */
113    public void setParameter(String name, String[] values) {
114        requestParams.put(name, values);
115    }
116
117        @Override
118        public Object getAttribute(String name) {
119                return requestAttributes.get(name);
120        }
121
122        @Override
123        public Enumeration getAttributeNames() {
124                return Collections.enumeration(requestAttributes.keySet());
125        }
126
127        @Override
128        public void removeAttribute(String name) {
129                requestAttributes.remove(name);
130        }
131
132        @Override
133        public void setAttribute(String name, Object o) {
134                requestAttributes.put(name, o);
135        }
136        
137        @Override
138        public Locale getLocale() {
139            return locale;
140        }
141        
142        @Override
143        public Enumeration getLocales() {
144            return locales;
145        }
146}