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.modern.consumer;
  
  import java.util.Collections;
  import java.util.Objects;
  import java.util.Set;
  
  /**
   * The metadata associated with a regular expression in a Consumer Group.
   */
  public class ResolvedRegularExpression {
      public static final ResolvedRegularExpression EMPTY = new ResolvedRegularExpression(Set.of(), -1L, -1L);
  
      /**
       * The set of resolved topics.
       */
      public final Set<String> topics;
  
      /**
       * The version of the metadata image used to resolve the topics.
       */
      public final long version;
  
      /**
       * The timestamp at the time of the resolution.
       */
      public final long timestamp;
  
      public ResolvedRegularExpression(
          Set<String> topics,
          long version,
          long timestamp
      ) {
          this.topics = Collections.unmodifiableSet(Objects.requireNonNull(topics));
          this.version = version;
          this.timestamp = timestamp;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
  
          ResolvedRegularExpression that = (ResolvedRegularExpression) o;
  
          if (version != that.version) return false;
          if (timestamp != that.timestamp) return false;
          return topics.equals(that.topics);
      }
  
      @Override
      public int hashCode() {
          int result = topics.hashCode();
          result = 31 * result + (int) (version ^ (version >>> 32));
          result = 31 * result + (int) (timestamp ^ (timestamp >>> 32));
          return result;
      }
  
      @Override
      public String toString() {
          return "RegularExpressionMetadata(" +
              "topics=" + topics +
              ", version=" + version +
              ", timestamp=" + timestamp +
              ')';
      }
  }
  