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1
57
58 package org.apache.commons.discovery.resource;
59
60 import java.io.IOException  ;
61 import java.net.URL ;
62 import java.util.Enumeration ;
63
64 import org.apache.commons.discovery.Resource;
65 import org.apache.commons.discovery.ResourceDiscover;
66 import org.apache.commons.discovery.ResourceNameListener;
67 import org.apache.commons.discovery.jdk.JDKHooks;
68 import org.apache.commons.discovery.log.DiscoveryLogFactory;
69 import org.apache.commons.logging.Log;
70
71
72
78 public class DiscoverResources extends ResourceDiscoverImpl
79 implements ResourceDiscover, ResourceNameListener
80 {
81 private static Log log = DiscoveryLogFactory.newLog(DiscoverResources.class);
82 public static void setLog(Log _log) {
83 log = _log;
84 }
85
86
89 public DiscoverResources() {
90 super();
91 }
92
93
96 public DiscoverResources(ClassLoaders classLoaders) {
97 super(classLoaders);
98 }
99
100
103 public boolean find(String resourceName) {
104 if (log.isDebugEnabled())
105 log.debug("find: resourceName='" + resourceName + "'");
106
107 for (int idx = 0; idx < getClassLoaders().size(); idx++) {
108 ClassLoader loader = getClassLoaders().get(idx);
109 if (log.isDebugEnabled())
110 log.debug("find: search using ClassLoader '" + loader + "'");
111
112 try {
113 Enumeration resources =
114 JDKHooks.getJDKHooks().getResources(loader, resourceName);
115
116 if (resources != null) {
117 while(resources.hasMoreElements()) {
118 if (!notifyListener(new Resource(resourceName,
119 (URL )resources.nextElement(),
120 loader))) {
121 return false;
122 }
123 }
124 }
125 } catch( IOException ex ) {
126 log.warn("find: Ignoring Exception", ex);
127 }
128 }
129 return true;
130 }
131
132 public boolean found(String resourceName) {
133 return find(resourceName);
134 }
135 }
136 |
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