Class ZstdOptions

java/core/src/java/org/apache/orc/impl/ZstdCodec.java:58–160

  }

  static class ZstdOptions implements Options {
    private int level;
    private int windowLog;
    private int strategy;

    ZstdOptions(int level, int windowLog, int strategy) {
      this.level = level;
      this.windowLog = windowLog;
      this.strategy = strategy;
    }

    @Override
    public ZstdOptions copy() {
      return new ZstdOptions(level, windowLog, strategy);
    }

    @Override
    public Options setSpeed(SpeedModifier newValue) {
      return this;
    }

    /**
     * Sets the Zstandard long mode maximum back-reference distance, expressed
     * as a power of 2.
     * <p>
     * The value must be between ZSTD_WINDOWLOG_MIN (10) and ZSTD_WINDOWLOG_MAX
     * (30 and 31 on 32/64-bit architectures, respectively).
     * <p>
     * A value of 0 is a special value indicating to use the default
     * ZSTD_WINDOWLOG_LIMIT_DEFAULT of 27, which corresponds to back-reference
     * window size of 128MiB.
     *
     * @param newValue The desired power-of-2 value back-reference distance.
     * @return ZstdOptions
     */
    public ZstdOptions setWindowLog(int newValue) {
      if ((newValue < Zstd.windowLogMin() || newValue > Zstd.windowLogMax()) && newValue != 0) {
        throw new IllegalArgumentException(
            String.format(
                "Zstd compression window size should be in the range %d to %d,"
                    + " or set to the default value of 0.",
                Zstd.windowLogMin(),
                Zstd.windowLogMax()));
      }
      windowLog = newValue;
      return this;
    }

    /**
     * Sets the Zstandard compression codec compression level directly using
     * the integer setting. This value is typically between 0 and 22, with
     * larger numbers indicating more aggressive compression and lower speed.
     * <p>
     * This method provides additional granularity beyond the setSpeed method
     * so that users can select a specific level.
     *
     * @param newValue The level value of compression to set.
     * @return ZstdOptions