content: /*
   * 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.ambari.spi.stack;
  
  import java.util.Comparator;
  
  /**
   * A stack supplies an implementation class to handle version representations.
   */
  public interface StackReleaseVersion {
  
    /**
     * @param info
     *          the release info instance
     * @return  the full display string
     */
    String getFullVersion(StackReleaseInfo info);
  
    /**
     * @return a comparator of release info
     */
    Comparator<StackReleaseInfo> getComparator();
  
    /**
     * Parses a version string to a stack release info
     * @param versionString
     *          the version string
     * @return the corresponding stack release.  Never {@code null}.
     */
    StackReleaseInfo parse(String versionString);
  }
  
  