/**
 * Copyright (C) 2012-2017 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * License version 2 and the aforementioned licenses.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 */
package org.n52.sos.ogc.swes;

import java.util.Set;

/**
 * Interface for OfferingExtensionProvider. Implementations of this interface
 * are loaded by the {@link OfferingExtensionRepository}.
 * 
 * @since 4.1.0
 * 
 */
public interface OfferingExtensionProvider {

    /**
     * Get the offering extension for the specific offering identifier this
     * provider provides.
     * 
     * @param identifier
     *            the identifier to get extension for
     * @return provided offering extensions
     */
    SwesExtensions getOfferingExtensions(String identifier);

    /**
     * Check if this provider provide offering extensions for the specific
     * identifier
     * 
     * @param identifier
     *            the identifier to check
     * @return <code>true</code>, if offering extensions provided for this
     *         identifier
     */
    boolean hasExtendedOfferingFor(String identifier);

    /**
     * Get the offering extension keys
     * 
     * @return the offering extension keys
     */
    Set<OfferingExtensionKey> getOfferingExtensionKeyTypes();

}