001/*
002 * The contents of this file are subject to the terms of the Common Development and
003 * Distribution License (the License). You may not use this file except in compliance with the
004 * License.
005 *
006 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
007 * specific language governing permission and limitations under the License.
008 *
009 * When distributing Covered Software, include this CDDL Header Notice in each file and include
010 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
011 * Header, with the fields enclosed by brackets [] replaced by your own identifying
012 * information: "Portions copyright [year] [name of copyright owner]".
013 *
014 * Copyright 2013-2015 ForgeRock AS.
015 */
016
017package org.forgerock.json.jose.jwe;
018
019import org.forgerock.json.jose.exceptions.JweException;
020import org.forgerock.json.jose.jwe.handlers.compression.CompressionHandler;
021import org.forgerock.json.jose.jwe.handlers.compression.DeflateCompressionHandler;
022import org.forgerock.json.jose.jwe.handlers.compression.NOPCompressionHandler;
023
024/**
025 * A service to get the appropriate CompressionHandler for a specified Compression algorithm.
026 * <p>
027 * For details of all supported algorithms see {@link CompressionAlgorithm}.
028 *
029 * @since 2.0.0
030 */
031public class CompressionManager {
032
033    /**
034     * Gets the appropriate CompressionHandler that can perform the required compression using the given
035     * compression algorithm.
036     *
037     * @param algorithm The Compression algorithm.
038     * @return The CompressionHandler.
039     */
040    public CompressionHandler getCompressionHandler(CompressionAlgorithm algorithm) {
041
042        switch (algorithm) {
043        case NONE: {
044            return new NOPCompressionHandler();
045        }
046        case DEF: {
047            return new DeflateCompressionHandler();
048        }
049        default: {
050            throw new JweException("No Compression Handler for unknown compression algorithm, "
051                    + algorithm + ".");
052        }
053        }
054    }
055}