1 /*
2  * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/UriPatternMatcher.java $
3  * $Revision: 630662 $
4  * $Date: 2008-02-24 11:40:51 -0800 (Sun, 24 Feb 2008) $
5  *
6  * ====================================================================
7  * Licensed to the Apache Software Foundation (ASF) under one
8  * or more contributor license agreements.  See the NOTICE file
9  * distributed with this work for additional information
10  * regarding copyright ownership.  The ASF licenses this file
11  * to you under the Apache License, Version 2.0 (the
12  * "License"); you may not use this file except in compliance
13  * with the License.  You may obtain a copy of the License at
14  *
15  *   http://www.apache.org/licenses/LICENSE-2.0
16  *
17  * Unless required by applicable law or agreed to in writing,
18  * software distributed under the License is distributed on an
19  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20  * KIND, either express or implied.  See the License for the
21  * specific language governing permissions and limitations
22  * under the License.
23  * ====================================================================
24  *
25  * This software consists of voluntary contributions made by many
26  * individuals on behalf of the Apache Software Foundation.  For more
27  * information on the Apache Software Foundation, please see
28  * <http://www.apache.org/>.
29  *
30  */
31 
32 package org.apache.http.protocol;
33 
34 import java.util.HashMap;
35 import java.util.Iterator;
36 import java.util.Map;
37 
38 /**
39  * Maintains a map of objects keyed by a request URI pattern.
40  * Instances can be looked up by request URI.<br/>
41  * Patterns may have three formats:
42  * <ul>
43  *   <li><code>*</code></li>
44  *   <li><code>*&lt;uri&gt;</code></li>
45  *   <li><code>&lt;uri&gt;*</code></li>
46  * </ul>
47  *
48  * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
49  *
50  * @version $Revision: 630662 $
51  *
52  * @deprecated Please use {@link java.net.URL#openConnection} instead.
53  *     Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a>
54  *     for further details.
55  */
56 @Deprecated
57 public class UriPatternMatcher {
58 
59     private final Map handlerMap;
60 
UriPatternMatcher()61     public UriPatternMatcher() {
62         super();
63         this.handlerMap = new HashMap();
64     }
65 
register(final String pattern, final Object handler)66     public void register(final String pattern, final Object handler) {
67         if (pattern == null) {
68             throw new IllegalArgumentException("URI request pattern may not be null");
69         }
70         if (handler == null) {
71             throw new IllegalArgumentException("HTTP request handelr may not be null");
72         }
73         this.handlerMap.put(pattern, handler);
74     }
75 
unregister(final String pattern)76     public void unregister(final String pattern) {
77         if (pattern == null) {
78             return;
79         }
80         this.handlerMap.remove(pattern);
81     }
82 
setHandlers(final Map map)83     public void setHandlers(final Map map) {
84         if (map == null) {
85             throw new IllegalArgumentException("Map of handlers may not be null");
86         }
87         this.handlerMap.clear();
88         this.handlerMap.putAll(map);
89     }
90 
lookup(String requestURI)91     public Object lookup(String requestURI) {
92         if (requestURI == null) {
93             throw new IllegalArgumentException("Request URI may not be null");
94         }
95         //Strip away the query part part if found
96         int index = requestURI.indexOf("?");
97         if (index != -1) {
98             requestURI = requestURI.substring(0, index);
99         }
100 
101         // direct match?
102         Object handler = this.handlerMap.get(requestURI);
103         if (handler == null) {
104             // pattern match?
105             String bestMatch = null;
106             for (Iterator it = this.handlerMap.keySet().iterator(); it.hasNext();) {
107                 String pattern = (String) it.next();
108                 if (matchUriRequestPattern(pattern, requestURI)) {
109                     // we have a match. is it any better?
110                     if (bestMatch == null
111                             || (bestMatch.length() < pattern.length())
112                             || (bestMatch.length() == pattern.length() && pattern.endsWith("*"))) {
113                         handler = this.handlerMap.get(pattern);
114                         bestMatch = pattern;
115                     }
116                 }
117             }
118         }
119         return handler;
120     }
121 
matchUriRequestPattern(final String pattern, final String requestUri)122     protected boolean matchUriRequestPattern(final String pattern, final String requestUri) {
123         if (pattern.equals("*")) {
124             return true;
125         } else {
126             return
127             (pattern.endsWith("*") && requestUri.startsWith(pattern.substring(0, pattern.length() - 1))) ||
128             (pattern.startsWith("*") && requestUri.endsWith(pattern.substring(1, pattern.length())));
129         }
130     }
131 
132 }
133