1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.protocol;
import java.util.HashMap;
import java.util.Map;
import ch.boye.httpclientandroidlib.annotation.GuardedBy;
import ch.boye.httpclientandroidlib.annotation.ThreadSafe;
import ch.boye.httpclientandroidlib.util.Args;
/**
* Maintains a map of objects keyed by a request URI pattern.
* <br>
* Patterns may have three formats:
* <ul>
* <li><code>*</code></li>
* <li><code>*<uri></code></li>
* <li><code><uri>*</code></li>
* </ul>
* <br>
* This class can be used to resolve an object matching a particular request
* URI.
*
* @since 4.0
*/
@ThreadSafe
public class UriPatternMatcher<T> {
@GuardedBy("this")
private final Map<String, T> map;
public UriPatternMatcher() {
super();
this.map = new HashMap<String, T>();
}
/**
* Registers the given object for URIs matching the given pattern.
*
* @param pattern the pattern to register the handler for.
* @param obj the object.
*/
public synchronized void register(final String pattern, final T obj) {
Args.notNull(pattern, "URI request pattern");
this.map.put(pattern, obj);
}
/**
* Removes registered object, if exists, for the given pattern.
*
* @param pattern the pattern to unregister.
*/
public synchronized void unregister(final String pattern) {
if (pattern == null) {
return;
}
this.map.remove(pattern);
}
/**
* @deprecated (4.1) do not use
*/
@Deprecated
public synchronized void setHandlers(final Map<String, T> map) {
Args.notNull(map, "Map of handlers");
this.map.clear();
this.map.putAll(map);
}
/**
* @deprecated (4.1) do not use
*/
@Deprecated
public synchronized void setObjects(final Map<String, T> map) {
Args.notNull(map, "Map of handlers");
this.map.clear();
this.map.putAll(map);
}
/**
* @deprecated (4.1) do not use
*/
@Deprecated
public synchronized Map<String, T> getObjects() {
return this.map;
}
/**
* Looks up an object matching the given request path.
*
* @param path the request path
* @return object or <code>null</code> if no match is found.
*/
public synchronized T lookup(final String path) {
Args.notNull(path, "Request path");
// direct match?
T obj = this.map.get(path);
if (obj == null) {
// pattern match?
String bestMatch = null;
for (final String pattern : this.map.keySet()) {
if (matchUriRequestPattern(pattern, path)) {
// we have a match. is it any better?
if (bestMatch == null
|| (bestMatch.length() < pattern.length())
|| (bestMatch.length() == pattern.length() && pattern.endsWith("*"))) {
obj = this.map.get(pattern);
bestMatch = pattern;
}
}
}
}
return obj;
}
/**
* Tests if the given request path matches the given pattern.
*
* @param pattern the pattern
* @param path the request path
* @return <code>true</code> if the request URI matches the pattern,
* <code>false</code> otherwise.
*/
protected boolean matchUriRequestPattern(final String pattern, final String path) {
if (pattern.equals("*")) {
return true;
} else {
return
(pattern.endsWith("*") && path.startsWith(pattern.substring(0, pattern.length() - 1))) ||
(pattern.startsWith("*") && path.endsWith(pattern.substring(1, pattern.length())));
}
}
@Override
public String toString() {
return this.map.toString();
}
}
|
