org.apache.hadoop.util.VersionUtil.java Source code

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Here is the source code for org.apache.hadoop.util.VersionUtil.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.util;

import org.apache.hadoop.classification.InterfaceAudience;

/**
 * A wrapper class to maven's ComparableVersion class, to comply
 * with maven's version name string convention 
 */
@InterfaceAudience.Private
public abstract class VersionUtil {
    /**
     * Compares two version name strings using maven's ComparableVersion class.
     *
     * @param version1
     *          the first version to compare
     * @param version2
     *          the second version to compare
     * @return a negative integer if version1 precedes version2, a positive
     *         integer if version2 precedes version1, and 0 if and only if the two
     *         versions are equal.
     */
    public static int compareVersions(String version1, String version2) {
        ComparableVersion v1 = new ComparableVersion(version1);
        ComparableVersion v2 = new ComparableVersion(version2);
        return v1.compareTo(v2);
    }
}