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.stack.upgrade;
  
  import org.apache.commons.lang.StringUtils;
  
  /**
   * Indicates if an sequence of Groups should be for an upgrade or a downgrade.
   */
  public enum Direction {
    UPGRADE,
    DOWNGRADE;
  
    /**
     * @return {@code true} if the direction is for upgrade.  Convenience instead
     * of equality checking.
     */
    public boolean isUpgrade() {
      return this == UPGRADE;
    }
  
    /**
     * @return {@code true} if the direction is for downgrade.  Convenience instead
     * of equality checking.
     */
    public boolean isDowngrade() {
      return this == DOWNGRADE;
    }
  
  
    /**
     * @param proper {@code true} to make the first letter captilized
     * @return "upgrade" or "downgrade"
     */
    public String getText(boolean proper) {
      return proper ? StringUtils.capitalize(name().toLowerCase()) :
        name().toLowerCase();
    }
  
    /**
     * @param proper {@code true} to make the first letter captilized
     * @return "upgraded" or "downgraded"
     */
    public String getPast(boolean proper) {
      return getText(proper) + "d";
    }
  
    /**
     * @param proper {@code true} to make the first letter captilized
     * @return "upgrades" or "downgrades"
     */
    public String getPlural(boolean proper) {
      return getText(proper) + "s";
    }
  
    /**
     * @param proper {@code true} to make the first letter captilized
     * @return "upgrading" or "downgrading"
     */
    public String getVerb(boolean proper) {
      String verb = (this == UPGRADE) ? "upgrading" : "downgrading";
  
      return proper ? StringUtils.capitalize(verb) : verb;
    }
  
  
    /**
     * Gets the preposition based on the direction. Since the repository is
     * singular, it will either be "to repo" or "from repo".
     *
     * @return "to" or "from"
     */
    public String getPreposition() {
      return (this == UPGRADE) ? "to" : "from";
    }
  }
  