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.common.telemetry.internals;
  
  import org.apache.kafka.common.MetricName;
  
  import java.util.Collections;
  import java.util.Map;
  import java.util.Objects;
  
  /**
   * Value object that contains the name and tags for a Metric.
   */
  public class MetricKey implements MetricKeyable {
  
      private final String name;
      private final Map<String, String> tags;
  
      /**
       * Create a {@code MetricKey}
       *
       * @param name metric name. This should be the telemetry metric name of the metric (the final name
       *             under which this metric is emitted).
       */
      public MetricKey(String name) {
          this(name, null);
      }
  
      /**
       * Create a {@code MetricKey}
       *
       * @param name metric name. This should be the .converted. name of the metric (the final name
       *             under which this metric is emitted).
       * @param tags mapping of tag keys to values.
       */
      public MetricKey(String name, Map<String, String> tags) {
          this.name = Objects.requireNonNull(name);
          this.tags = tags != null ? Collections.unmodifiableMap(tags) : Collections.emptyMap();
      }
  
      public MetricKey(MetricName metricName) {
          this(metricName.name(), metricName.tags());
      }
  
      @Override
      public MetricKey key() {
          return this;
      }
  
      public String name() {
          return name;
      }
  
      public Map<String, String> tags() {
          return tags;
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(name, tags);
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj)
              return true;
          if (obj == null)
              return false;
          if (getClass() != obj.getClass())
              return false;
          MetricKey other = (MetricKey) obj;
          return this.name().equals(other.name()) && this.tags().equals(other.tags());
      }
  
      @Override
      public String toString() {
          return "MetricKey {name=" + name() + ", tags=" + tags() + "}";
      }
  
  }
  