001/*
002 *  Copyright (c) 2004-2024 QOS.ch
003 *  All rights reserved.
004 *
005 *  Permission is hereby granted, free  of charge, to any person obtaining
006 *  a  copy  of this  software  and  associated  documentation files  (the
007 *  "Software"), to  deal in  the Software without  restriction, including
008 *  without limitation  the rights to  use, copy, modify,  merge, publish,
009 *  distribute,  sublicense, and/or sell  copies of  the Software,  and to
010 *  permit persons to whom the Software  is furnished to do so, subject to
011 *  the following conditions:
012 *
013 *  The  above  copyright  notice  and  this permission  notice  shall  be
014 *  included in all copies or substantial portions of the Software.
015 *
016 *  THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
017 *  EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
018 *  MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
019 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
020 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
021 *  OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
022 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
023 */
024
025package org.slf4j.helpers;
026
027/**
028 * Various utility methods
029 *
030 * @since 2.0.14
031 */
032public class Slf4jEnvUtil {
033
034
035    /**
036     * Returns the current version of slf4j, or null if data is not available.
037     *
038     * @return current version or null if missing version data
039     * @since 2.0.14
040     */
041    static public String slf4jVersion() {
042//        String moduleVersion = slf4jVersionByModule();
043//        if(moduleVersion != null)
044//            return moduleVersion;
045
046        Package pkg = Slf4jEnvUtil.class.getPackage();
047        if(pkg == null) {
048            return null;
049        }
050        final String pkgVersion = pkg.getImplementationVersion();
051        return pkgVersion;
052    }
053
054    /**
055     * Returns the current version of slf4j via class.getModule()
056     * or null if data is not available.
057     *
058     * @return current version or null if missing version data
059     * @since 2.0.14
060     */
061//    static private String slf4jVersionByModule() {
062//        Module module = Slf4jEnvUtil.class.getModule();
063//        if (module == null)
064//            return null;
065//
066//        ModuleDescriptor md = module.getDescriptor();
067//        if (md == null)
068//            return null;
069//        Optional<String> opt = md.rawVersion();
070//        return opt.orElse(null);
071//    }
072
073}