public synchronized List<ProviderIdent> listProviders() {
final ArrayList<ProviderIdent> providerIdents = new ArrayList<ProviderIdent>();
final String[] strings = getClassnames();
for (final String classname : strings) {
try {
providerIdents.add(getProviderDeclaration(loadClass(classname)));
} catch (PluginException e) {
e.printStackTrace();
}
}
return providerIdents;
}
/** Return true if the file has a class that provides the ident. */
public synchronized boolean isLoaderFor(final ProviderIdent ident) {
final String[] strings = getClassnames();
for (final String classname : strings) {
try {
if (matchesProviderDeclaration(ident, loadClass(classname))) {
return true;
}
} catch (PluginException e) {
e.printStackTrace();
}
}
return false;
}
/** Load provider instance for the service */
@SuppressWarnings("unchecked")
public synchronized <T> T load(final PluggableService<T> service, final String providerName)
throws ProviderLoaderException {
final ProviderIdent ident = new ProviderIdent(service.getName(), providerName);
debug("loadInstance for " + ident + ": " + pluginJar);
if (null == pluginProviderDefs.get(ident)) {
final String[] strings = getClassnames();
for (final String classname : strings) {
final Class<?> cls;
try {
cls = loadClass(classname);
if (matchesProviderDeclaration(ident, cls)) {
pluginProviderDefs.put(ident, cls);
}
} catch (PluginException e) {
log.error(
"Failed to load class from "
+ pluginJar
+ ": classname: "
+ classname
+ ": "
+ e.getMessage());
}
}
}
final Class<T> cls = pluginProviderDefs.get(ident);
if (null != cls) {
try {
return createProviderForClass(service, cls);
} catch (PluginException e) {
throw new ProviderLoaderException(e, service.getName(), providerName);
}
}
return null;
}
