Class ZlibOptions

java/core/src/java/org/apache/orc/impl/ZlibCodec.java:36–111

  private Boolean direct = null;

  static class ZlibOptions implements Options {
    private int level;
    private int strategy;
    private final boolean FIXED;

    ZlibOptions(int level, int strategy, boolean fixed) {
      this.level = level;
      this.strategy = strategy;
      FIXED = fixed;
    }

    @Override
    public ZlibOptions copy() {
      return new ZlibOptions(level, strategy, false);
    }

    @Override
    public ZlibOptions setSpeed(SpeedModifier newValue) {
      if (FIXED) {
        throw new IllegalStateException("Attempt to modify the default options");
      }
      switch (newValue) {
        case FAST:
          // deflate_fast looking for 16 byte patterns
          level = Deflater.BEST_SPEED + 1;
          break;
        case DEFAULT:
          // deflate_slow looking for 128 byte patterns
          level = Deflater.DEFAULT_COMPRESSION;
          break;
        case FASTEST:
          // deflate_fast looking for 8 byte patterns
          level = Deflater.BEST_SPEED;
          break;
        default:
          break;
      }
      return this;
    }

    @Override
    public ZlibOptions setData(DataKind newValue) {
      if (FIXED) {
        throw new IllegalStateException("Attempt to modify the default options");
      }
      switch (newValue) {
        case BINARY:
          /* filtered == less LZ77, more huffman */
          strategy = Deflater.FILTERED;
          break;
        case TEXT:
          strategy = Deflater.DEFAULT_STRATEGY;
          break;
        default:
          break;
      }
      return this;
    }