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 javax.xml.bind.annotation.XmlRootElement;
  import javax.xml.bind.annotation.XmlSeeAlso;
  
  import org.apache.ambari.server.stack.upgrade.orchestrate.UpgradeContext;
  
  /**
   * The {@link Condition} interface represents a condition in an
   * {@link UpgradePack} which must be satisified in order for a {@link Grouping}
   * or {@link ExecuteStage} to be scheduled.
   */
  @XmlRootElement
  @XmlSeeAlso(value = { SecurityCondition.class, ConfigurationCondition.class })
  public class Condition {
  
    /**
     * Asks the condition whether it is currently satisfied.
     *
     * @param upgradeContext
     *          the upgrade context.
     * @return {@code true} if the condition is satisfied, {@code false}
     *         otherwise.
     */
    public boolean isSatisfied(UpgradeContext upgradeContext) {
      return false;
    }
  }
  