RegisteredResourcesSupplier.java

package sk.stuba.fiit.perconik.core.preferences;

import com.google.common.collect.SetMultimap;

import sk.stuba.fiit.perconik.core.Listener;
import sk.stuba.fiit.perconik.core.persistence.Registrations;
import sk.stuba.fiit.perconik.core.services.resources.ResourceNamesSupplier;

/**
 * A class that supplies classes of currently registered
 * resources based on {@link ResourcePreferences}.
 *
 * @author Pavol Zbell
 * @since 1.0
 */
public final class RegisteredResourcesSupplier implements ResourceNamesSupplier {
  /**
   * The constructor.
   */
  public RegisteredResourcesSupplier() {}

  /**
   * Gets names of registered resources grouped under listener
   * types according to the current state of <i>instance</i> scope
   * of {@code ResourcePreferences}.
   * @return names of registered resources grouped under listener types
   */
  public SetMultimap<Class<? extends Listener>, String> get() {
    ResourcePreferences preferences = ResourcePreferences.getShared();

    return Registrations.toResourceNames(Registrations.marked(preferences.getResourcePersistenceData()));
  }
}