1 /**
2 * Copyright By Grandsoft Company Limited.
3 * 2012-8-23 下午04:16:04
4 */
5 package gboat2.web.util;
6
7 import gboat2.web.Activator;
8
9 import java.net.URL;
10
11 import org.osgi.framework.Bundle;
12 import org.osgi.framework.BundleContext;
13
14 /**
15 *
16 * 获取bundle的工具类
17 * @author tanxw
18 * @since jdk1.6
19 * @date 2012-8-23
20 *
21 */
22
23 public abstract class BundleUtil {
24
25 private static BundleContext context = null;
26
27 //private static Map<String, Bundle> bundlesMap = null;
28
29 //private static byte[] lock = new byte[0]; // 特殊的instance变量
30
31 private static BundleContext getBundleContext() {
32 if (null == context) {
33 context = Activator.LOCAL_BUNDLE.getBundleContext();
34 }
35 return context;
36 }
37
38 // private static void cacheBundle() { //when bandle update,stop, the instance chenged
39 // bundlesMap = new HashMap<String, Bundle>();
40 // Bundle[] bs = getBundleContext().getBundles();
41 // for (Bundle b : bs) {
42 // bundlesMap.put(b.getSymbolicName(), b);
43 // }
44 // }
45
46 // public static Bundle getBundle(String bundleName) {
47 // synchronized (lock) {
48 // if (null == bundlesMap) {
49 // cacheBundle();
50 // }
51 // }
52 // return bundlesMap.get(bundleName);
53 // }
54 //
55 /**
56 * 根据bunlde SymbolicName 取 bundle实例
57 * @param bundleName bunlde SymbolicName
58 * @return bunlde SymbolicName 对应的bundle实例
59 */
60 public static Bundle getBundle(String bundleName) {
61 Bundle[] bs = getBundleContext().getBundles();
62 for (Bundle b : bs) {
63 if (b.getSymbolicName().equals(bundleName)) {
64 return b;
65 }
66 }
67 return null;
68 }
69
70 /**
71 * 取得指定bundle下的资源
72 * @param bundleName bunlde SymbolicName
73 * @param path 资源路径
74 * @return 指定bundle下资源
75 */
76 public static URL getResourceOfBundle(String bundleName, String path) {
77 Bundle bundle = getBundle(bundleName);
78 if (null == bundle) {
79 return null;
80 }
81 return bundle.getResource(path);
82 }
83
84 }