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Source code
001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.io.storage.util;
020
021import org.apache.reef.io.Tuple;
022
023import java.util.Comparator;
024
025public final class TupleKeyComparator<K, V> implements
026    Comparator<Tuple<K, V>> {
027  private final Comparator<K> c;
028
029  public TupleKeyComparator(final Comparator<K> c) {
030    this.c = c;
031  }
032
033  @Override
034  public int compare(final Tuple<K, V> o1, final Tuple<K, V> o2) {
035    return c.compare(o1.getKey(), o2.getKey());
036  }
037}