How to use

getClassLoaders

method

in

org.geotools.factory.FactoryRegistry

/**
 * Scans the given category for plugins only if needed. After this method has been
 * invoked once for a given category, it will no longer scan for that category.
 */
private <T> void scanForPluginsIfNeeded(final Class<?> category) {
  if (needScanForPlugins != null && needScanForPlugins.remove(category)) {
    if (needScanForPlugins.isEmpty()) {
      needScanForPlugins = null;
    }
    scanForPlugins(getClassLoaders(), category);
  }
}

/**
 * Scans for factory plug-ins on the application class path. This method is
 * needed because the application class path can theoretically change, or
 * additional plug-ins may become available. Rather than re-scanning the
 * classpath on every invocation of the API, the class path is scanned
 * automatically only on the first invocation. Clients can call this
 * method to prompt a re-scan. Thus this method need only be invoked by
 * sophisticated applications which dynamically make new plug-ins
 * available at runtime.
 */
public void scanForPlugins() {
  final Set<ClassLoader> loaders = getClassLoaders();
  for (final Iterator<Class<?>> categories=getCategories(); categories.hasNext();) {
    final Class<?> category = categories.next();
    scanForPlugins(loaders, category);
  }
}

/**
 * Scans for factory plug-ins on the application class path. This method is
 * needed because the application class path can theoretically change, or
 * additional plug-ins may become available. Rather than re-scanning the
 * classpath on every invocation of the API, the class path is scanned
 * automatically only on the first invocation. Clients can call this
 * method to prompt a re-scan. Thus this method need only be invoked by
 * sophisticated applications which dynamically make new plug-ins
 * available at runtime.
 */
public void scanForPlugins() {
  final Set loaders = getClassLoaders();
  for (final Iterator categories=getCategories(); categories.hasNext();) {
    final Class category = (Class) categories.next();
    scanForPlugins(loaders, category);
  }
}

scanForPlugins(getClassLoaders(), category);
iterator = getServiceProviders(category, true);

Iterator iterator = getServiceProviders(category, hintsFilter, true);
if (!iterator.hasNext()) {
  scanForPlugins(getClassLoaders(), category);
  iterator = getServiceProviders(category, hintsFilter, true);