Source code: org/apache/hivemind/util/IdUtils.java
1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.hivemind.util;
16
17 import org.apache.hivemind.HiveMind;
18
19 /**
20 * A collection of utilities for handling qualified and unqualified ids.
21 *
22 * @author Howard Lewis Ship
23 */
24 public class IdUtils
25 {
26
27 /**
28 * Returns a fully qualfied id. If the id contains a '.', then it
29 * is returned unchanged. Otherwise, the module's id is prefixed (with a
30 * seperator '.') and returned;
31 */
32 public static String qualify(String moduleId, String id)
33 {
34 if (id.indexOf('.') > 0)
35 return id;
36
37 return moduleId + "." + id;
38 }
39
40 /**
41 * Qualifies a list of interceptor service ids provided for an interceptor
42 * contribution. The special value "*" is not qualified.
43 */
44 public static String qualifyList(String sourceModuleId, String list)
45 {
46 if (HiveMind.isBlank(list) || list.equals("*"))
47 return list;
48
49 String[] items = StringUtils.split(list);
50
51 for (int i = 0; i < items.length; i++)
52 items[i] = qualify(sourceModuleId, items[i]);
53
54 return StringUtils.join(items, ',');
55 }
56
57 /**
58 * Removes the module name from a fully qualified id
59 */
60 public static String stripModule(String id)
61 {
62 int lastPoint = id.lastIndexOf('.');
63 if (lastPoint > 0)
64 return id.substring(lastPoint + 1, id.length());
65 else return id;
66 }
67
68 /**
69 * Extracts the module name from a fully qualified id
70 * Returns null if id contains no module
71 */
72 public static String extractModule(String id)
73 {
74 int lastPoint = id.lastIndexOf('.');
75 if (lastPoint > 0)
76 return id.substring(0, lastPoint);
77 else return null;
78 }
79
80 }