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.TopicImage;
  import org.apache.kafka.metadata.PartitionRegistration;
  
  import java.util.ArrayList;
  import java.util.Collection;
  
  
  public final class TopicImageNode implements MetadataNode {
      /**
       * The topic image.
       */
      private final TopicImage image;
  
      public TopicImageNode(TopicImage image) {
          this.image = image;
      }
  
      @Override
      public Collection<String> childNames() {
          ArrayList<String> childNames = new ArrayList<>();
          childNames.add("name");
          childNames.add("id");
          for (Integer partitionId : image.partitions().keySet()) {
              childNames.add(partitionId.toString());
          }
          return childNames;
      }
  
      @Override
      public MetadataNode child(String name) {
          if (name.equals("name")) {
              return new MetadataLeafNode(image.name());
          } else if (name.equals("id")) {
              return new MetadataLeafNode(image.id().toString());
          } else {
              int partitionId;
              try {
                  partitionId = Integer.parseInt(name);
              } catch (NumberFormatException e) {
                  return null;
              }
              PartitionRegistration registration = image.partitions().get(partitionId);
              if (registration == null) return null;
              return new MetadataLeafNode(registration.toString());
          }
      }
  }
  