001package ca.uhn.fhir.util;
002
003/*
004 * #%L
005 * HAPI FHIR - Core Library
006 * %%
007 * Copyright (C) 2014 - 2016 University Health Network
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 java.io.IOException;
024import java.io.InputStream;
025import java.util.Properties;
026
027/**
028 * Used internally by HAPI to log the version of the HAPI FHIR framework
029 * once, when the framework is first loaded by the classloader.
030 */
031public class VersionUtil {
032
033        private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(VersionUtil.class);
034        private static String ourVersion;
035
036        static {
037                initialize();
038        }
039
040        public static String getVersion() {
041                return ourVersion;
042        }
043
044        private static void initialize() {
045                InputStream is = null;
046                try {
047                        is = VersionUtil.class.getResourceAsStream("/ca/uhn/fhir/hapi-version.properties");
048                        Properties p = new Properties();
049                        p.load(is);
050                        ourVersion = p.getProperty("version");
051                        ourLog.info("HAPI FHIR version is: " + ourVersion);
052                } catch (IOException e) {
053                        ourLog.warn("Unable to determine HAPI version information", e);
054                } finally {
055                        if (is != null) {
056                                try {
057                                        is.close();
058                                } catch (IOException e) {
059                                        // ignore
060                                }
061                        }
062                }
063        }
064        
065        public static void main(String[] args) {
066                getVersion();
067        }
068}