001/*
002 * Copyright 2012-2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.boot;
018
019/**
020 * Class that exposes the Spring Boot version. Fetches the "Implementation-Version"
021 * manifest attribute from the jar file.
022 * <p>
023 * Note that some ClassLoaders do not expose the package metadata, hence this class might
024 * not be able to determine the Spring Boot version in all environments. Consider using a
025 * reflection-based check instead: For example, checking for the presence of a specific
026 * Spring Boot method that you intend to call.
027 *
028 * @author Drummond Dawson
029 * @since 1.3.0
030 */
031public final class SpringBootVersion {
032
033        private SpringBootVersion() {
034        }
035
036        /**
037         * Return the full version string of the present Spring Boot codebase, or {@code null}
038         * if it cannot be determined.
039         * @return the version of Spring Boot or {@code null}
040         * @see Package#getImplementationVersion()
041         */
042        public static String getVersion() {
043                Package pkg = SpringBootVersion.class.getPackage();
044                return (pkg != null) ? pkg.getImplementationVersion() : null;
045        }
046
047}