Method create

java/core/src/java/org/apache/orc/impl/InStream.java:874–894

Create an input stream from a list of disk ranges with data. @param name the name of the stream @param input the list of ranges of bytes for the stream; from disk or cache @param offset the first byte offset of the stream @param length the length in bytes of the stream @param options the options to

(Object name,
                                DiskRangeList input,
                                long offset,
                                long length,
                                StreamOptions options)

   * @return an input stream
   */
  public static InStream create(Object name,
                                DiskRangeList input,
                                long offset,
                                long length,
                                StreamOptions options) {
    LOG.debug("Reading {} with {} from {} for {}", name, options, offset,
        length);
    if (options == null || options.codec == null) {
      if (options == null || options.key == null) {
        return new UncompressedStream(name, input, offset, length);
      } else {
        OutStream.logKeyAndIv(name, options.getKey(), options.getIv());
        return new EncryptedStream(name, input, offset, length, options);
      }
    } else if (options.key == null) {
      return new CompressedStream(name, input, offset, length, options);
    } else {
      OutStream.logKeyAndIv(name, options.getKey(), options.getIv());
      return new EncryptedCompressedStream(name, input, offset, length, options);
    }
  }

  /**
   * Create an input stream from a list of disk ranges with data.