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
   *
   *     https://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.avro.mapred;
  
  import java.io.Closeable;
  import java.io.IOException;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.fs.FileSystem;
  import org.apache.hadoop.fs.FSDataInputStream;
  
  import org.apache.avro.file.SeekableInput;
  
  /** Adapt an {@link FSDataInputStream} to {@link SeekableInput}. */
  public class FsInput implements Closeable, SeekableInput {
    private final FSDataInputStream stream;
    private final long len;
  
    /** Construct given a path and a configuration. */
    public FsInput(Path path, Configuration conf) throws IOException {
      this(path, path.getFileSystem(conf));
    }
  
    /** Construct given a path and a {@code FileSystem}. */
    public FsInput(Path path, FileSystem fileSystem) throws IOException {
      this.len = fileSystem.getFileStatus(path).getLen();
      this.stream = fileSystem.open(path);
    }
  
    @Override
    public long length() {
      return len;
    }
  
    @Override
    public int read(byte[] b, int off, int len) throws IOException {
      return stream.read(b, off, len);
    }
  
    @Override
    public void seek(long p) throws IOException {
      stream.seek(p);
    }
  
    @Override
    public long tell() throws IOException {
      return stream.getPos();
    }
  
    @Override
    public void close() throws IOException {
      stream.close();
    }
  }
  