trunk/core/src/main/java/org/apache/hama/monitor/MetricsTag.java

/**
 * 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.hama.monitor;

/**
 * Information that classifies MetricsRecord.
 */
public final class MetricsTag {
  private final String name;
  private final String value;

  public MetricsTag(String name, String value) {
    this.name = name;
    this.value = value;
  }

  public final String name() {
    return this.name;
  }

  public final String value() {
    return this.value;
  }

  @Override
  public boolean equals(Object target) {
    if (target == this)
      return true;
    if (null == target)
      return false;
    if (getClass() != target.getClass())
      return false;

    MetricsTag t = (MetricsTag) target;
    if (!t.name.equals(name))
      return false;
    if (!t.value.equals(value))
      return false;
    return true;
  }

  @Override
  public int hashCode() {
    int result = 17;
    result = 37 * result + name().hashCode();
    result = 37 * result + value().hashCode();
    return result;
  }
}