1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet;
24  
25  import java.io.IOException;
26  
27  import java.util.Collections;
28  import java.util.List;
29  
30  import javax.portlet.ActionRequest;
31  import javax.portlet.ActionResponse;
32  import javax.portlet.EventPortlet;
33  import javax.portlet.EventRequest;
34  import javax.portlet.EventResponse;
35  import javax.portlet.Portlet;
36  import javax.portlet.PortletException;
37  import javax.portlet.RenderRequest;
38  import javax.portlet.RenderResponse;
39  import javax.portlet.ResourceRequest;
40  import javax.portlet.ResourceResponse;
41  import javax.portlet.ResourceServingPortlet;
42  import javax.portlet.filter.ActionFilter;
43  import javax.portlet.filter.EventFilter;
44  import javax.portlet.filter.FilterChain;
45  import javax.portlet.filter.PortletFilter;
46  import javax.portlet.filter.RenderFilter;
47  import javax.portlet.filter.ResourceFilter;
48  
49  /**
50   * <a href="FilterChainImpl.java.html"><b><i>View Source</i></b></a>
51   *
52   * @author Brian Wing Shun Chan
53   *
54   */
55  public class FilterChainImpl implements FilterChain {
56  
57      public FilterChainImpl(
58          Portlet portlet, List<? extends PortletFilter> portletFilters) {
59  
60          _portlet = portlet;
61  
62          if (portletFilters != null) {
63              _portletFilters = portletFilters;
64          }
65          else {
66              _portletFilters = Collections.EMPTY_LIST;
67          }
68      }
69  
70      public void doFilter(
71              ActionRequest actionRequest, ActionResponse actionResponse)
72          throws IOException, PortletException {
73  
74          if (_portletFilters.size() > _pos) {
75              ActionFilter portletFilter = (ActionFilter)_portletFilters.get(
76                  _pos++);
77  
78              portletFilter.doFilter(actionRequest, actionResponse, this);
79          }
80          else {
81              _portlet.processAction(actionRequest, actionResponse);
82          }
83      }
84  
85      public void doFilter(EventRequest eventRequest, EventResponse eventResponse)
86          throws IOException, PortletException {
87  
88          if (_portletFilters.size() > _pos) {
89              EventFilter portletFilter = (EventFilter)_portletFilters.get(
90                  _pos++);
91  
92              portletFilter.doFilter(eventRequest, eventResponse, this);
93          }
94          else {
95              EventPortlet eventPortlet = (EventPortlet)_portlet;
96  
97              eventPortlet.processEvent(eventRequest, eventResponse);
98          }
99      }
100 
101     public void doFilter(
102             RenderRequest renderRequest, RenderResponse renderResponse)
103         throws IOException, PortletException {
104 
105         if (_portletFilters.size() > _pos) {
106             RenderFilter portletFilter = (RenderFilter)_portletFilters.get(
107                 _pos++);
108 
109             portletFilter.doFilter(renderRequest, renderResponse, this);
110         }
111         else {
112             _portlet.render(renderRequest, renderResponse);
113         }
114     }
115 
116     public void doFilter(
117             ResourceRequest resourceRequest, ResourceResponse resourceResponse)
118         throws IOException, PortletException {
119 
120         if (_portletFilters.size() > _pos) {
121             ResourceFilter portletFilter = (ResourceFilter)_portletFilters.get(
122                 _pos++);
123 
124             portletFilter.doFilter(resourceRequest, resourceResponse, this);
125         }
126         else {
127             ResourceServingPortlet resourceServingPortlet =
128                 (ResourceServingPortlet)_portlet;
129 
130             resourceServingPortlet.serveResource(
131                 resourceRequest, resourceResponse);
132         }
133     }
134 
135     private Portlet _portlet;
136     private List<? extends PortletFilter> _portletFilters;
137     private int _pos;
138 
139 }