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.utils;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.ambari.server.actionmanager.HostRoleCommand;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class CommandUtils {
    private static final Logger LOG = LoggerFactory.getLogger(CommandUtils.class);
  
    /**
     * Converts a collection of commands to {@code}Map{@code} from command.taskId to command.
     */
    public static Map<Long, HostRoleCommand> convertToTaskIdCommandMap(Collection<HostRoleCommand> commands) {
      if (commands == null || commands.isEmpty()) {
        return Collections.emptyMap();
      }
  
      Map<Long, HostRoleCommand> result = new HashMap<>();
      for (HostRoleCommand command : commands) {
        result.put(command.getTaskId(), command);
      }
      return result;
    }
  }
  