/*
    * 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.commons.compress.archivers.zip;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.nio.channels.FileChannel;
  import java.nio.file.OpenOption;
  import java.nio.file.Path;
  import java.nio.file.StandardOpenOption;
  import java.util.Objects;
  
  /**
   * {@link RandomAccessOutputStream} implementation based on a file.
   */
  // Keep package-private; consider for Apache Commons IO.
  final class FileRandomAccessOutputStream extends RandomAccessOutputStream {
  
      private final FileChannel channel;
  
      private long position;
  
      FileRandomAccessOutputStream(final FileChannel channel) {
          this.channel = Objects.requireNonNull(channel, "channel");
      }
  
      FileRandomAccessOutputStream(final Path file) throws IOException {
          this(file, StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.WRITE);
      }
  
      FileRandomAccessOutputStream(final Path file, final OpenOption... options) throws IOException {
          this(FileChannel.open(file, options));
      }
  
      FileChannel channel() {
          return channel;
      }
  
      @Override
      public void close() throws IOException {
          if (channel.isOpen()) {
              channel.close();
          }
      }
  
      @Override
      public synchronized long position() {
          return position;
      }
  
      @Override
      public synchronized void write(final byte[] b, final int off, final int len) throws IOException {
          ZipIoUtil.writeAll(channel, ByteBuffer.wrap(b, off, len));
          position += len;
      }
  
      @Override
      public void writeAll(final byte[] b, final int off, final int len, final long pos) throws IOException {
          ZipIoUtil.writeAll(channel, ByteBuffer.wrap(b, off, len), pos);
          position += len;
      }
  }