content: /*
   * 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.cassandra.io.util;
  
  import java.io.IOException;
  
  import org.apache.cassandra.utils.ChecksumType;
  
  public final class ChecksummedRandomAccessReader
  {
      @SuppressWarnings({ "resource", "RedundantSuppression" }) // The Rebufferer owns both the channel and the validator and handles closing both.
      public static RandomAccessReader open(File file, File crcFile) throws IOException
      {
          ChannelProxy channel = new ChannelProxy(file);
          try
          {
              DataIntegrityMetadata.ChecksumValidator validator = new DataIntegrityMetadata.ChecksumValidator(ChecksumType.CRC32,
                                                                                                              RandomAccessReader.open(crcFile),
                                                                                                              file.path());
              Rebufferer rebufferer = new ChecksummedRebufferer(channel, validator);
              return new RandomAccessReader.RandomAccessReaderWithOwnChannel(rebufferer);
          }
          catch (Throwable t)
          {
              channel.close();
              throw t;
          }
      }
  }
  