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CompressionUtil Class — netty Architecture

Architecture documentation for the CompressionUtil class in CompressionUtil.java from the netty codebase.

Class java

Entity Profile

Dependency Diagram

graph TD
  b678ebbd_688b_7807_e413_4d37c69d7bdd["CompressionUtil"]
  f5dbf087_a564_1cfb_69ba_983e2f3cf7ea["CompressionUtil.java"]
  b678ebbd_688b_7807_e413_4d37c69d7bdd -->|defined in| f5dbf087_a564_1cfb_69ba_983e2f3cf7ea
  9920c5ad_c592_1505_395f_766582129974["CompressionUtil()"]
  b678ebbd_688b_7807_e413_4d37c69d7bdd -->|method| 9920c5ad_c592_1505_395f_766582129974
  00114dad_6fc8_28d1_3c05_ae34c1578b32["checkChecksum()"]
  b678ebbd_688b_7807_e413_4d37c69d7bdd -->|method| 00114dad_6fc8_28d1_3c05_ae34c1578b32
  cdef01f4_3ebc_763a_2b08_958db30c31e5["ByteBuffer()"]
  b678ebbd_688b_7807_e413_4d37c69d7bdd -->|method| cdef01f4_3ebc_763a_2b08_958db30c31e5

Relationship Graph

Source Code

codec-compression/src/main/java/io/netty/handler/codec/compression/CompressionUtil.java lines 22–47

final class CompressionUtil {

    private CompressionUtil() { }

    static void checkChecksum(ByteBufChecksum checksum, ByteBuf uncompressed, int currentChecksum) {
        checksum.reset();
        checksum.update(uncompressed,
                uncompressed.readerIndex(), uncompressed.readableBytes());

        final int checksumResult = (int) checksum.getValue();
        if (checksumResult != currentChecksum) {
            throw new DecompressionException(String.format(
                    "stream corrupted: mismatching checksum: %d (expected: %d)",
                    checksumResult, currentChecksum));
        }
    }

    static ByteBuffer safeReadableNioBuffer(ByteBuf buffer) {
        return safeNioBuffer(buffer, buffer.readerIndex(), buffer.readableBytes());
    }

    static ByteBuffer safeNioBuffer(ByteBuf buffer, int index, int length) {
        return buffer.nioBufferCount() == 1 ? buffer.internalNioBuffer(index, length)
                : buffer.nioBuffer(index, length);
    }
}

Defined In

Source

Frequently Asked Questions

What is the CompressionUtil class?
CompressionUtil is a class in the netty codebase, defined in codec-compression/src/main/java/io/netty/handler/codec/compression/CompressionUtil.java.
Where is CompressionUtil defined?
CompressionUtil is defined in codec-compression/src/main/java/io/netty/handler/codec/compression/CompressionUtil.java at line 22.

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