UnreleasableByteBuf Class — netty Architecture

Source Code

buffer/src/main/java/io/netty/buffer/UnreleasableByteBuf.java lines 26–133

final class UnreleasableByteBuf extends WrappedByteBuf {

    private SwappedByteBuf swappedBuf;

    UnreleasableByteBuf(ByteBuf buf) {
        super(buf instanceof UnreleasableByteBuf ? buf.unwrap() : buf);
    }

    @Override
    public ByteBuf order(ByteOrder endianness) {
        if (ObjectUtil.checkNotNull(endianness, "endianness") == order()) {
            return this;
        }

        SwappedByteBuf swappedBuf = this.swappedBuf;
        if (swappedBuf == null) {
            this.swappedBuf = swappedBuf = new SwappedByteBuf(this);
        }
        return swappedBuf;
    }

    @Override
    public ByteBuf asReadOnly() {
        return buf.isReadOnly() ? this : new UnreleasableByteBuf(buf.asReadOnly());
    }

    @Override
    public ByteBuf readSlice(int length) {
        return new UnreleasableByteBuf(buf.readSlice(length));
    }

    @Override
    public ByteBuf readRetainedSlice(int length) {
        // We could call buf.readSlice(..), and then call buf.release(). However this creates a leak in unit tests
        // because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
        // So we just use readSlice(..) because the end result should be logically equivalent.
        return readSlice(length);
    }

    @Override
    public ByteBuf slice() {
        return new UnreleasableByteBuf(buf.slice());
    }

    @Override
    public ByteBuf retainedSlice() {
        // We could call buf.retainedSlice(), and then call buf.release(). However this creates a leak in unit tests
        // because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
        // So we just use slice() because the end result should be logically equivalent.
        return slice();
    }

    @Override
    public ByteBuf slice(int index, int length) {
        return new UnreleasableByteBuf(buf.slice(index, length));
    }

    @Override
    public ByteBuf retainedSlice(int index, int length) {
        // We could call buf.retainedSlice(..), and then call buf.release(). However this creates a leak in unit tests
        // because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
        // So we just use slice(..) because the end result should be logically equivalent.
        return slice(index, length);
    }

    @Override
    public ByteBuf duplicate() {
        return new UnreleasableByteBuf(buf.duplicate());
    }

    @Override
    public ByteBuf retainedDuplicate() {
        // We could call buf.retainedDuplicate(), and then call buf.release(). However this creates a leak in unit tests
        // because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
        // So we just use duplicate() because the end result should be logically equivalent.
        return duplicate();
    }

    @Override
    public ByteBuf retain(int increment) {
        return this;