001package ca.uhn.fhir.jpa.dao;
002
003/*
004 * #%L
005 * HAPI FHIR Storage api
006 * %%
007 * Copyright (C) 2014 - 2022 Smile CDR, Inc.
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import ca.uhn.fhir.i18n.Msg;
024import ca.uhn.fhir.parser.DataFormatException;
025import org.apache.commons.io.IOUtils;
026
027import java.io.ByteArrayInputStream;
028import java.io.ByteArrayOutputStream;
029import java.io.IOException;
030import java.util.zip.GZIPInputStream;
031import java.util.zip.GZIPOutputStream;
032
033public class GZipUtil {
034
035        public static String decompress(byte[] theResource) {
036                GZIPInputStream is;
037                try {
038                        is = new GZIPInputStream(new ByteArrayInputStream(theResource));
039                        return IOUtils.toString(is, "UTF-8");
040                } catch (IOException e) {
041                        throw new DataFormatException(Msg.code(516) + "Failed to decompress contents", e);
042                }
043        }
044
045        public static byte[] compress(String theEncoded) {
046                try {
047                        ByteArrayOutputStream os = new ByteArrayOutputStream();
048                        GZIPOutputStream gos = new GZIPOutputStream(os);
049                        IOUtils.write(theEncoded, gos, "UTF-8");
050                        gos.close();
051                        os.close();
052                        byte[] retVal = os.toByteArray();
053                        return retVal;
054                } catch (IOException e) {
055                        throw new DataFormatException(Msg.code(517) + "Compress contents", e);
056                }
057        }
058
059}