/**
    * 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.hadoop.hbase.metrics;
  
  import com.google.common.base.Objects;
  import com.google.common.base.Preconditions;
  
  import org.apache.hadoop.classification.InterfaceAudience;
  import org.apache.hadoop.metrics2.MetricsInfo;
  
  /**
   * Making implementing metric info a little easier
   */
  @InterfaceAudience.Private
  class MetricsInfoImpl implements MetricsInfo {
    private final String name, description;
  
    MetricsInfoImpl(String name, String description) {
      this.name = Preconditions.checkNotNull(name, "name");
      this.description = Preconditions.checkNotNull(description, "description");
    }
  
    @Override public String name() {
      return name;
    }
  
    @Override public String description() {
      return description;
    }
  
    @Override public boolean equals(Object obj) {
      if (obj instanceof MetricsInfo) {
        MetricsInfo other = (MetricsInfo) obj;
        return Objects.equal(name, other.name()) &&
            Objects.equal(description, other.description());
      }
      return false;
    }
  
    @Override public int hashCode() {
      return Objects.hashCode(name, description);
    }
  
    @Override public String toString() {
      return Objects.toStringHelper(this)
          .add("name", name).add("description", description)
          .toString();
    }
  }