private static RandomAccessFile mapper()

in datasketches-memory-java8/src/main/java/org/apache/datasketches/memory/internal/AllocateDirectWritableMap.java [208:222]

• 14 lines of code
• 4 McCabe index (conditional complexity)

  private static RandomAccessFile mapper(final File file, final long fileOffset,
      final long capacityBytes, final boolean resourceReadOnly)  {

    final String mode = resourceReadOnly ? "r" : "rw";
    final RandomAccessFile raf;
    try {
      raf = new RandomAccessFile(file, mode);
      if (fileOffset + capacityBytes > raf.length()) {
        raf.setLength(fileOffset + capacityBytes);
      }
    } catch (final IOException e) {
      throw new RuntimeException(e);
    }
    return raf;
  }