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      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 
     61     public UriPatternMatcher() {
     62         super();
     63         this.handlerMap = new HashMap();
     64     }
     65 
     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 
     76     public void unregister(final String pattern) {
     77         if (pattern == null) {
     78             return;
     79         }
     80         this.handlerMap.remove(pattern);
     81     }
     82 
     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 
     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 
    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