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.coordinator.group.streams;
  
  import org.apache.kafka.common.Uuid;
  
  import java.util.Objects;
  
  /**
   * Immutable topic metadata, representing the current state of a topic in the broker.
   *
   * @param id             The topic ID.
   * @param name           The topic name.
   * @param numPartitions  The number of partitions.
   */
  public record TopicMetadata(Uuid id, String name, int numPartitions) {
  
      public TopicMetadata(Uuid id,
                           String name,
                           int numPartitions) {
          this.id = Objects.requireNonNull(id);
          if (Uuid.ZERO_UUID.equals(id)) {
              throw new IllegalArgumentException("Topic id cannot be ZERO_UUID.");
          }
          this.name = Objects.requireNonNull(name);
          if (name.isEmpty()) {
              throw new IllegalArgumentException("Topic name cannot be empty.");
          }
          this.numPartitions = numPartitions;
          if (numPartitions <= 0) {
              throw new IllegalArgumentException("Number of partitions must be positive.");
          }
      }
  }
  