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.fs;
020    
021    import org.apache.hadoop.io.MD5Hash;
022    import org.apache.hadoop.util.DataChecksum;
023    
024    /** For CRC32 with the Castagnoli polynomial */
025    public class MD5MD5CRC32CastagnoliFileChecksum extends MD5MD5CRC32FileChecksum {
026      /** Same as this(0, 0, null) */
027      public MD5MD5CRC32CastagnoliFileChecksum() {
028        this(0, 0, null);
029      }
030    
031      /** Create a MD5FileChecksum */
032      public MD5MD5CRC32CastagnoliFileChecksum(int bytesPerCRC, long crcPerBlock, MD5Hash md5) {
033        super(bytesPerCRC, crcPerBlock, md5);
034      }
035    
036      @Override
037      public DataChecksum.Type getCrcType() {
038        // default to the one that is understood by all releases.
039        return DataChecksum.Type.CRC32C;
040      }
041    }