Asset.java

/**
 * 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.api;

import org.opencastproject.util.MimeType;

import com.entwinemedia.fn.data.Opt;

import java.io.InputStream;

/**
 * An asset is a {@link org.opencastproject.mediapackage.MediaPackageElement} under the control of the {@link AssetManager}.
 */
public interface Asset {
  /** Return the identifier of the asset. */
  AssetId getId();

  /**
   * Return a stream to the asset data. A client is responsible of closing the stream after consumption.
   * Use the <i>try with resource</i> construct which is available from Java 7 onwards if possible.
   * <p>
   * If the asset is currently not {@linkplain #getAvailability() available} an empty input stream is
   * returned.
   */
  InputStream getInputStream();

  /** Mime type of the asset. */
  Opt<MimeType> getMimeType();

  /** Size of the asset in bytes. */
  long getSize();

  /** Tell about the availability of the asset. */
  Availability getAvailability();
}