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.agent.stomp.dto;
  
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.ambari.server.NullHostNameException;
  
  public class TopologyUpdateHandlingReport {
    private Set<String> updatedHostNames = new HashSet<>();
    private boolean mappingChanged = false;
  
    public boolean wasChanged(){
      return mappingChanged || !updatedHostNames.isEmpty();
    }
  
    public Set<String> getUpdatedHostNames() {
      return updatedHostNames;
    }
  
    public void addHostName(String updatedHostName) throws NullHostNameException {
      if (updatedHostName == null) {
        throw new NullHostNameException("Host name could not be a null");
      }
      this.updatedHostNames.add(updatedHostName);
    }
  
    public void addHostsNames(Set<String> updatedHostNames) {
      this.updatedHostNames.addAll(updatedHostNames);
    }
  
    public void mappingWasChanged() {
      this.mappingChanged = true;
    }
  }
  