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.trevni;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.nio.channels.FileChannel;
  import java.nio.ByteBuffer;
  import java.io.IOException;
  
  /** An {@link Input} for files. */
  public class InputFile implements Input {
  
    private FileChannel channel;
  
    /** Construct for the given file. */
    public InputFile(File file) throws IOException {
      this.channel = new FileInputStream(file).getChannel();
    }
  
    @Override
    public long length() throws IOException {
      return channel.size();
    }
  
    @Override
    public int read(long position, byte[] b, int start, int len) throws IOException {
      return channel.read(ByteBuffer.wrap(b, start, len), position);
    }
  
    @Override
    public void close() throws IOException {
      channel.close();
    }
  
  }
  