001/*
002 * #%L
003 * HAPI FHIR Storage api
004 * %%
005 * Copyright (C) 2014 - 2024 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.jpa.dao;
021
022import ca.uhn.fhir.i18n.Msg;
023import ca.uhn.fhir.parser.DataFormatException;
024import org.apache.commons.io.IOUtils;
025
026import java.io.ByteArrayInputStream;
027import java.io.ByteArrayOutputStream;
028import java.io.IOException;
029import java.util.zip.GZIPInputStream;
030import java.util.zip.GZIPOutputStream;
031
032public class GZipUtil {
033
034        public static String decompress(byte[] theResource) {
035                GZIPInputStream is;
036                try {
037                        is = new GZIPInputStream(new ByteArrayInputStream(theResource));
038                        return IOUtils.toString(is, "UTF-8");
039                } catch (IOException e) {
040                        throw new DataFormatException(Msg.code(516) + "Failed to decompress contents", e);
041                }
042        }
043
044        public static byte[] compress(String theEncoded) {
045                try {
046                        ByteArrayOutputStream os = new ByteArrayOutputStream();
047                        GZIPOutputStream gos = new GZIPOutputStream(os);
048                        IOUtils.write(theEncoded, gos, "UTF-8");
049                        gos.close();
050                        os.close();
051                        byte[] retVal = os.toByteArray();
052                        return retVal;
053                } catch (IOException e) {
054                        throw new DataFormatException(Msg.code(517) + "Compress contents", e);
055                }
056        }
057}