AbstractFilteringListener.java

package sk.stuba.fiit.perconik.core;

import java.util.Set;

import com.google.common.collect.ImmutableSet;

/**
 * An abstract implementation of {@link FilteringListener}
 * holding acceptable event types in an immutable set.
 *
 * @author Pavol Zbell
 * @since 1.0
 */
public abstract class AbstractFilteringListener<T> extends Adapter implements FilteringListener<T> {
  /**
   * Set of acceptable event types.
   */
  protected Set<T> types;

  /**
   * Constructor for use by subclasses.
   */
  protected AbstractFilteringListener(final Set<T> types) {
    this.types = ImmutableSet.copyOf(types);
  }

  public final Set<T> getEventTypes() {
    return this.types;
  }
}