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Java > Open Source Codes > org > apache > jetspeed > capability > CapabilityMapFactory


1 /*
2  * Copyright 2000-2001,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */

16
17 package org.apache.jetspeed.capability;
18
19 import org.apache.jetspeed.om.registry.ClientEntry;
20 import org.apache.jetspeed.om.registry.ClientRegistry;
21 import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
22 import org.apache.jetspeed.services.logging.JetspeedLogger;
23 import org.apache.jetspeed.services.Registry;
24
25 import org.apache.turbine.util.RunData;
26
27
28 /**
29 This class describes various browsers capabilities and provides the
30 ability to query them.
31
32 FIXME: the implementation should change to be configuration file based and
33 handle more browsers.
34
35 @author <a HREF="mailto:raphael@apache.org">RaphaŽl Luta</a>
36 @version $Id: CapabilityMapFactory.java,v 1.15 2004/02/23 02:46:39 jford Exp $
37 */

38 public class CapabilityMapFactory
39 {
40
41     public static final String JavaDoc DEFAULT_AGENT = "Mozilla/4.0";
42
43     public static final String JavaDoc AGENT_XML = "agentxml/1.0";
44
45     /**
46      * Static initialization of the logger for this class
47      */

48     private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(CapabilityMapFactory.class.getName());
49     
50     /**
51     Returns the map corresponding to the given RunData.
52     *
53     FIXME: the method will be changed to use a Jetspeed specific request
54     wrapper
55
56     @param rundata the request RunData
57     @return the map correspondin to the user-agent described in the RunData
58     */

59     public static CapabilityMap getCapabilityMap( RunData rundata )
60     {
61
62         if (rundata == null)
63         {
64             return getCapabilityMap(DEFAULT_AGENT);
65         }
66
67         return getCapabilityMap( rundata.getUserAgent() );
68     }
69
70     /**
71     Returns the map corresponding to the given user-agent
72
73     @param useragent a user-agent string in the HTTP User-agent format
74     @return the map corresponding to the user-agent
75     */

76     public static CapabilityMap getCapabilityMap( String JavaDoc useragent )
77     {
78         CapabilityMap map = null;
79
80         if (useragent == null)
81         {
82             useragent = DEFAULT_AGENT;
83         }
84
85         ClientRegistry registry = (ClientRegistry)Registry.get(Registry.CLIENT);
86         ClientEntry entry = registry.findEntry(useragent);
87
88         if (entry == null)
89         {
90             if (useragent.equals(DEFAULT_AGENT))
91             {
92                 logger.error("CapabilityMap: Default agent not found in Client Registry !");
93             }
94             else
95             {
96                 if (logger.isDebugEnabled())
97                 {
98                     logger.debug("CapabilityMap: useragent "+ useragent + "unknown, falling back to default");
99                 }
100                 map = getDefaultCapabilityMap();
101             }
102         }
103         else
104         {
105             map = new BaseCapabilityMap(useragent, entry);
106         }
107
108
109         if (logger.isDebugEnabled())
110         {
111             logger.debug("CapabilityMap: User-agent: "+useragent+" mapped to "+map);
112         }
113
114         return map;
115     }
116
117     /**
118     Returns the map corresponding to the given user-agent
119
120     @param useragent a user-agent string in the HTTP User-agent format
121     @return the map corresponding to the user-agent
122     */

123     public static CapabilityMap getDefaultCapabilityMap()
124     {
125         return getCapabilityMap(DEFAULT_AGENT);
126     }
127 }
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