ForwardingResourceProvider.java

package sk.stuba.fiit.perconik.core.services.resources;

import java.util.Set;

import sk.stuba.fiit.perconik.core.Listener;
import sk.stuba.fiit.perconik.core.Resource;
import sk.stuba.fiit.perconik.core.services.ForwardingProvider;

/**
 * A resource provider which forwards all its method calls to another resource
 * provider. Subclasses should override one or more methods to modify the
 * behavior of the backing resource provider as desired per the decorator
 * pattern.
 *
 * <p>Note that this class does <i>not</i> forward the {@code equals}
 * and {@code hashCode} methods through to the backing object. See
 * {@link com.google.common.collect.ForwardingObject ForwardingObject}
 * for more details.
 *
 * @author Pavol Zbell
 * @since 1.0
 */
public abstract class ForwardingResourceProvider extends ForwardingProvider implements ResourceProvider {
  /**
   * Constructor for use by subclasses.
   */
  protected ForwardingResourceProvider() {}

  @Override
  protected abstract ResourceProvider delegate();

  public Resource<?> forName(final String name) {
    return this.delegate().forName(name);
  }

  public <L extends Listener> Set<Resource<L>> forType(final Class<L> type) {
    return this.delegate().forType(type);
  }

  public Set<String> names() {
    return this.delegate().names();
  }

  public Set<Class<? extends Listener>> types() {
    return this.delegate().types();
  }

  @Override
  public ResourceProvider parent() {
    return this.delegate().parent();
  }
}