001    /**
002     * Copyright (c) 2000-2013 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.portal.kernel.portlet;
016    
017    import com.liferay.portal.kernel.util.ArrayUtil;
018    
019    import java.util.Collections;
020    import java.util.Enumeration;
021    import java.util.HashMap;
022    import java.util.LinkedHashSet;
023    import java.util.Map;
024    import java.util.Set;
025    
026    import javax.portlet.RenderRequest;
027    import javax.portlet.filter.RenderRequestWrapper;
028    
029    /**
030     * @author Brian Wing Shun Chan
031     * @see    DynamicActionRequest
032     * @see    DynamicEventRequest
033     * @see    DynamicResourceRequest
034     */
035    public class DynamicRenderRequest extends RenderRequestWrapper {
036    
037            public DynamicRenderRequest(RenderRequest renderRequest) {
038                    this(renderRequest, null, true);
039            }
040    
041            public DynamicRenderRequest(RenderRequest renderRequest, boolean inherit) {
042                    this(renderRequest, null, inherit);
043            }
044    
045            public DynamicRenderRequest(
046                    RenderRequest renderRequest, Map<String, String[]> params) {
047    
048                    this(renderRequest, params, true);
049            }
050    
051            public DynamicRenderRequest(
052                    RenderRequest renderRequest, Map<String, String[]> params,
053                    boolean inherit) {
054    
055                    super(renderRequest);
056    
057                    _params = new HashMap<String, String[]>();
058                    _inherit = inherit;
059    
060                    if (params != null) {
061                            _params.putAll(params);
062                    }
063    
064                    if (_inherit && (renderRequest instanceof DynamicRenderRequest)) {
065                            DynamicRenderRequest dynamicRenderRequest =
066                                    (DynamicRenderRequest)renderRequest;
067    
068                            setRequest(dynamicRenderRequest.getRequest());
069    
070                            params = dynamicRenderRequest.getDynamicParameterMap();
071    
072                            for (Map.Entry<String, String[]> entry : params.entrySet()) {
073                                    String name = entry.getKey();
074                                    String[] oldValues = entry.getValue();
075    
076                                    String[] curValues = _params.get(name);
077    
078                                    if (curValues == null) {
079                                            _params.put(name, oldValues);
080                                    }
081                                    else {
082                                            String[] newValues = ArrayUtil.append(oldValues, curValues);
083    
084                                            _params.put(name, newValues);
085                                    }
086                            }
087                    }
088            }
089    
090            public Map<String, String[]> getDynamicParameterMap() {
091                    return _params;
092            }
093    
094            @Override
095            public String getParameter(String name) {
096                    String[] values = _params.get(name);
097    
098                    if (_inherit && (values == null)) {
099                            return super.getParameter(name);
100                    }
101    
102                    if (ArrayUtil.isNotEmpty(values)) {
103                            return values[0];
104                    }
105                    else {
106                            return null;
107                    }
108            }
109    
110            @Override
111            public Map<String, String[]> getParameterMap() {
112                    Map<String, String[]> map = new HashMap<String, String[]>();
113    
114                    if (_inherit) {
115                            map.putAll(super.getParameterMap());
116                    }
117    
118                    map.putAll(_params);
119    
120                    return map;
121            }
122    
123            @Override
124            public Enumeration<String> getParameterNames() {
125                    Set<String> names = new LinkedHashSet<String>();
126    
127                    if (_inherit) {
128                            Enumeration<String> enu = super.getParameterNames();
129    
130                            while (enu.hasMoreElements()) {
131                                    names.add(enu.nextElement());
132                            }
133                    }
134    
135                    names.addAll(_params.keySet());
136    
137                    return Collections.enumeration(names);
138            }
139    
140            @Override
141            public String[] getParameterValues(String name) {
142                    String[] values = _params.get(name);
143    
144                    if (_inherit && (values == null)) {
145                            return super.getParameterValues(name);
146                    }
147    
148                    return values;
149            }
150    
151            public void setParameter(String name, String value) {
152                    _params.put(name, new String[] {value});
153            }
154    
155            public void setParameterValues(String name, String[] values) {
156                    _params.put(name, values);
157            }
158    
159            private boolean _inherit;
160            private Map<String, String[]> _params;
161    
162    }