org.glassfish.hk2.osgiresourcelocator.ResourceFinder Maven / Gradle / Ivy
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package org.glassfish.hk2.osgiresourcelocator;
import java.net.URL;
import java.util.List;
/**
* This class provides helper methods to look up resources that are part of OSGi bundles,
* but can't be exported. e.g., META-INF/mailcap file used by JavaMail.
*
* This class has been carefully coded to be loadable in non-OSGi environment.
* When it is used in such an environment, various getENtry methods return null.
*
* @author [email protected]
*/
public abstract class ResourceFinder {
private static ResourceFinder _me;
public static void initialize(ResourceFinder singleton) {
if (singleton == null) throw new NullPointerException("Did you intend to call reset()?");
if (_me != null) throw new IllegalStateException("Already initialzed with [" + _me + "]");
_me = singleton;
}
public static synchronized void reset() {
if (_me == null) {
throw new IllegalStateException("Not yet initialized");
}
_me = null;
}
public static URL findEntry(String path) {
if (_me == null) return null;
return _me.findEntry1(path);
}
public static List findEntries(String path) {
if (_me == null) return null;
return _me.findEntries1(path);
}
/*package*/
abstract URL findEntry1(String path);
/*package*/
abstract List findEntries1(String path);
}