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, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019 package org.apache.hadoop.record;
020
021 import org.apache.hadoop.classification.InterfaceAudience;
022 import org.apache.hadoop.classification.InterfaceStability;
023 import org.apache.hadoop.io.WritableComparable;
024 import org.apache.hadoop.io.WritableComparator;
025
026 /**
027 * A raw record comparator base class
028 *
029 * @deprecated Replaced by <a href="http://hadoop.apache.org/avro/">Avro</a>.
030 */
031 @Deprecated
032 @InterfaceAudience.Public
033 @InterfaceStability.Stable
034 public abstract class RecordComparator extends WritableComparator {
035
036 /**
037 * Construct a raw {@link Record} comparison implementation. */
038 protected RecordComparator(Class<? extends WritableComparable> recordClass) {
039 super(recordClass);
040 }
041
042 // inheric JavaDoc
043 @Override
044 public abstract int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2);
045
046 /**
047 * Register an optimized comparator for a {@link Record} implementation.
048 *
049 * @param c record classs for which a raw comparator is provided
050 * @param comparator Raw comparator instance for class c
051 */
052 public static synchronized void define(Class c, RecordComparator comparator) {
053 WritableComparator.define(c, comparator);
054 }
055 }