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.server.state.repository;
  
  import java.util.Comparator;
  
  import org.apache.ambari.server.utils.VersionUtils;
  import org.apache.ambari.spi.stack.StackReleaseInfo;
  import org.apache.ambari.spi.stack.StackReleaseVersion;
  import org.apache.commons.lang.StringUtils;
  
  /**
   * This is the default implementation if no stack provides an implementation.
   * Before this mechanism, Ambari assumed the version was in the format X.X.X.X-YYYY
   */
  public class DefaultStackVersion implements StackReleaseVersion {
  
    @Override
    public String getFullVersion(StackReleaseInfo info) {
  
      StringBuilder sb = new StringBuilder(info.getVersion());
  
      if (StringUtils.isNotBlank(info.getBuild())) {
        sb.append('-').append(StringUtils.trim(info.getBuild()));
      }
  
      return sb.toString();
    }
  
    @Override
    public Comparator<StackReleaseInfo> getComparator() {
  
      return new Comparator<StackReleaseInfo>() {
        @Override
        public int compare(StackReleaseInfo o1, StackReleaseInfo o2) {
          return VersionUtils.compareVersionsWithBuild(
              getFullVersion(o1), getFullVersion(o2), 4);
        }
      };
    }
  
    @Override
    public StackReleaseInfo parse(String versionString) {
      String version = "0";
      String build = "0";
  
      String[] parts = StringUtils.split(versionString, '-');
      if (1 == parts.length) {
        version = parts[0];
      } else if (parts.length > 1) {
        version = parts[0];
        build = parts[1];
      }
  
      return new StackReleaseInfo(version, "0", build);
    }
  
  
  }
  