ZstdOptions Class — netty Architecture

Source Code

codec-compression/src/main/java/io/netty/handler/codec/compression/ZstdOptions.java lines 30–76

public class ZstdOptions implements CompressionOptions {

    private final int blockSize;
    private final int compressionLevel;
    private final int maxEncodeSize;

    /**
     * Default implementation of {@link ZstdOptions} with{compressionLevel(int)} set to
     * {@link ZstdConstants#DEFAULT_COMPRESSION_LEVEL},{@link ZstdConstants#DEFAULT_BLOCK_SIZE},
     * {@link ZstdConstants#DEFAULT_MAX_ENCODE_SIZE}
     */
    static final ZstdOptions DEFAULT = new ZstdOptions(DEFAULT_COMPRESSION_LEVEL, DEFAULT_BLOCK_SIZE,
            DEFAULT_MAX_ENCODE_SIZE);

    /**
     * Create a new {@link ZstdOptions}
     *
     * @param  blockSize
     *           is used to calculate the compressionLevel
     * @param  maxEncodeSize
     *           specifies the size of the largest compressed object
     * @param  compressionLevel
     *           specifies the level of the compression
     */
    ZstdOptions(int compressionLevel, int blockSize, int maxEncodeSize) {
        if (!Zstd.isAvailable()) {
            throw new IllegalStateException("zstd-jni is not available", Zstd.cause());
        }

        this.compressionLevel = ObjectUtil.checkInRange(compressionLevel,
                MIN_COMPRESSION_LEVEL, MAX_COMPRESSION_LEVEL, "compressionLevel");
        this.blockSize = ObjectUtil.checkPositive(blockSize, "blockSize");
        this.maxEncodeSize = ObjectUtil.checkPositive(maxEncodeSize, "maxEncodeSize");
    }

    public int compressionLevel() {
        return compressionLevel;
    }

    public int blockSize() {
        return blockSize;
    }

    public int maxEncodeSize() {
        return maxEncodeSize;
    }
}