ZlibUtil Class — netty Architecture

Source Code

codec-compression/src/main/java/io/netty/handler/codec/compression/ZlibUtil.java lines 25–74

final class ZlibUtil {

    static void fail(Inflater z, String message, int resultCode) {
        throw inflaterException(z, message, resultCode);
    }

    static void fail(Deflater z, String message, int resultCode) {
        throw deflaterException(z, message, resultCode);
    }

    static DecompressionException inflaterException(Inflater z, String message, int resultCode) {
        return new DecompressionException(message + " (" + resultCode + ')' + (z.msg != null? ": " + z.msg : ""));
    }

    static CompressionException deflaterException(Deflater z, String message, int resultCode) {
        return new CompressionException(message + " (" + resultCode + ')' + (z.msg != null? ": " + z.msg : ""));
    }

    static JZlib.WrapperType convertWrapperType(ZlibWrapper wrapper) {
        switch (wrapper) {
        case NONE:
            return JZlib.W_NONE;
        case ZLIB:
            return JZlib.W_ZLIB;
        case GZIP:
            return JZlib.W_GZIP;
        case ZLIB_OR_NONE:
            return JZlib.W_ANY;
        default:
            throw new Error("Unexpected wrapper type: " + wrapper);
        }
    }

    static int wrapperOverhead(ZlibWrapper wrapper) {
        switch (wrapper) {
        case NONE:
            return 0;
        case ZLIB:
        case ZLIB_OR_NONE:
            return 2;
        case GZIP:
            return 10;
        default:
            throw new Error("Unexpected wrapper type: " + wrapper);
        }
    }

    private ZlibUtil() {
    }
}