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;
  
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.common.metadata.TopicRecord;
  import org.apache.kafka.image.node.TopicImageNode;
  import org.apache.kafka.image.writer.ImageWriter;
  import org.apache.kafka.image.writer.ImageWriterOptions;
  import org.apache.kafka.metadata.PartitionRegistration;
  
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Objects;
  
  
  /**
   * Represents a topic in the metadata image.
   *
   * This class is thread-safe.
   */
  public final class TopicImage {
      private final String name;
  
      private final Uuid id;
  
      private final Map<Integer, PartitionRegistration> partitions;
  
      public TopicImage(String name,
                        Uuid id,
                        Map<Integer, PartitionRegistration> partitions) {
          this.name = name;
          this.id = id;
          this.partitions = partitions;
      }
  
      public String name() {
          return name;
      }
  
      public Uuid id() {
          return id;
      }
  
      public Map<Integer, PartitionRegistration> partitions() {
          return partitions;
      }
  
      public void write(ImageWriter writer, ImageWriterOptions options) {
          writer.write(0, new TopicRecord().
              setName(name).
              setTopicId(id));
          for (Entry<Integer, PartitionRegistration> entry : partitions.entrySet()) {
              int partitionId = entry.getKey();
              PartitionRegistration partition = entry.getValue();
              writer.write(partition.toRecord(id, partitionId, options));
          }
      }
  
      @Override
      public boolean equals(Object o) {
          if (!(o instanceof TopicImage other)) return false;
          return name.equals(other.name) &&
              id.equals(other.id) &&
              partitions.equals(other.partitions);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(name, id, partitions);
      }
  
      @Override
      public String toString() {
          return new TopicImageNode(this).stringify();
      }
  }
  