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.kafka.image.node;
  
  import org.apache.kafka.image.ClusterImage;
  import org.apache.kafka.metadata.BrokerRegistration;
  
  import java.util.ArrayList;
  import java.util.Collection;
  
  
  public class ClusterImageBrokersNode implements MetadataNode {
      /**
       * The name of this node.
       */
      public static final String NAME = "brokers";
  
      /**
       * The cluster image.
       */
      private final ClusterImage image;
  
      public ClusterImageBrokersNode(ClusterImage image) {
          this.image = image;
      }
  
      @Override
      public Collection<String> childNames() {
          ArrayList<String> childNames = new ArrayList<>();
          for (Integer brokerId : image.brokers().keySet()) {
              childNames.add(brokerId.toString());
          }
          return childNames;
      }
  
      @Override
      public MetadataNode child(String name) {
          try {
              Integer brokerId = Integer.valueOf(name);
              BrokerRegistration registration = image.brokers().get(brokerId);
              if (registration == null) return null;
              return new MetadataLeafNode(registration.toString());
          } catch (NumberFormatException e) {
              return null;
          }
      }
  }
  