001/*
002 *    GeoAPI - Java interfaces for OGC/ISO standards
003 *    Copyright © 2014-2023 Open Geospatial Consortium, Inc.
004 *    http://www.geoapi.org
005 *
006 *    Licensed under the Apache License, Version 2.0 (the "License");
007 *    you may not use this file except in compliance with the License.
008 *    You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *    Unless required by applicable law or agreed to in writing, software
013 *    distributed under the License is distributed on an "AS IS" BASIS,
014 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 *    See the License for the specific language governing permissions and
016 *    limitations under the License.
017 */
018package org.opengis.metadata.constraint;
019
020import java.util.Collection;
021import java.util.Collections;
022
023import org.opengis.annotation.UML;
024import org.opengis.util.InternationalString;
025import org.opengis.metadata.citation.Responsibility;
026
027import static org.opengis.annotation.Obligation.*;
028import static org.opengis.annotation.Specification.ISO_19115;
029
030
031/**
032 * Information about resource release constraints.
033 *
034 * @author  Rémi Maréchal (Geomatys)
035 * @version 3.1
036 * @since   3.1
037 */
038@UML(identifier="MD_Releasability", specification=ISO_19115)
039public interface Releasability {
040    /**
041     * Parties to which the release statement applies.
042     * Returns an empty collection if none.
043     *
044     * @return parties to which the release statement applies.
045     */
046    @UML(identifier="addressee", obligation=OPTIONAL, specification=ISO_19115)
047    default Collection<? extends Responsibility> getAddressees() {
048        return Collections.emptyList();
049    }
050
051    /**
052     * Release statement.
053     * May be {@code null} if unspecified.
054     *
055     * @return release statement, or {@code null} if none.
056     */
057    @UML(identifier="statement", obligation=OPTIONAL, specification=ISO_19115)
058    default InternationalString getStatement() {
059        return null;
060    }
061
062    /**
063     * Components in determining releasability.
064     * Returns an empty collection if none.
065     *
066     * @return components in determining releasability.
067     */
068    @UML(identifier="disseminationConstraints", obligation=OPTIONAL, specification=ISO_19115)
069    default Collection<Restriction> getDisseminationConstraints() {
070        return Collections.emptySet();          // Use Set instead of List for hash-safe final classes.
071    }
072}