/*
    * Licensed to The Apereo Foundation under one or more contributor license
    * agreements. See the NOTICE file distributed with this work for additional
    * information regarding copyright ownership.
    *
    *
    * The Apereo Foundation licenses this file to you under the Educational
    * Community License, Version 2.0 (the "License"); you may not use this file
    * except in compliance with the License. You may obtain a copy of the License
   * at:
   *
   *   http://opensource.org/licenses/ecl2.txt
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations under
   * the License.
   *
   */
  package org.opencastproject.assetmanager.impl;
  
  import org.opencastproject.mediapackage.MediaPackage;
  import org.opencastproject.mediapackage.MediaPackageElement;
  
  import java.util.Arrays;
  import java.util.List;
  import java.util.function.Predicate;
  import java.util.stream.Collectors;
  
  /**
   * Product of a media package and a media package element filter.
   * <p>
   * Get the filtered set of elements by calling {@link #getElements()}.
   */
  public class PartialMediaPackage {
    private final MediaPackage mediaPackage;
    private final Predicate<MediaPackageElement> filter;
  
    public PartialMediaPackage(MediaPackage mediaPackage, Predicate<MediaPackageElement> filter) {
      this.mediaPackage = mediaPackage;
      this.filter = filter;
    }
  
    public static PartialMediaPackage mk(MediaPackage mp, Predicate<MediaPackageElement> filter) {
      return new PartialMediaPackage(mp, filter);
    }
  
    public MediaPackage getMediaPackage() {
      return mediaPackage;
    }
  
    public Predicate<MediaPackageElement> getPredicate() {
      return filter;
    }
  
    public List<MediaPackageElement> getElements() {
      return Arrays.stream(mediaPackage.getElements())
          .filter(filter)
          .collect(Collectors.toList());
    }
  }