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.topology;
  
  /**
   * Component cardinality representation.
   */
  public class Cardinality {
    String cardinality;
    int min = 0;
    int max = Integer.MAX_VALUE;
    int exact = -1;
    boolean isAll = false;
  
    public Cardinality(String cardinality) {
      this.cardinality = cardinality;
      if (cardinality != null && ! cardinality.isEmpty()) {
        if (cardinality.contains("+")) {
          min = Integer.parseInt(cardinality.split("\\+")[0]);
        } else if (cardinality.contains("-")) {
          String[] toks = cardinality.split("-");
          min = Integer.parseInt(toks[0]);
          max = Integer.parseInt(toks[1]);
        } else if (cardinality.equals("ALL")) {
          isAll = true;
        } else {
          exact = Integer.parseInt(cardinality);
        }
      }
    }
  
    /**
     * Determine if component is required for all host groups.
     *
     * @return true if cardinality is 'ALL', false otherwise
     */
    public boolean isAll() {
      return isAll;
    }
  
    /**
     * Determine if the given count satisfies the required cardinality.
     *
     * @param count  number of host groups containing component
     *
     * @return true id count satisfies the required cardinality, false otherwise
     */
    public boolean isValidCount(int count) {
      if (isAll) {
        return false;
      } else if (exact != -1) {
        return count == exact;
      } else return count >= min && count <= max;
    }
  
    /**
     * Determine if the cardinality count supports auto-deployment.
     * This determination is independent of whether the component is configured
     * to be auto-deployed.  This only indicates whether auto-deployment is
     * supported for the current cardinality.
     *
     * At this time, only cardinalities of ALL or where a count of 1 is valid are
     * supported.
     *
     * @return true if cardinality supports auto-deployment
     */
    public boolean supportsAutoDeploy() {
      return isValidCount(1) || isAll;
    }
  
    public String getValue() {
      return cardinality;
    }
  }
  