DecoderResult Class — netty Architecture

Source Code

codec-base/src/main/java/io/netty/handler/codec/DecoderResult.java lines 21–76

public class DecoderResult {

    protected static final Signal SIGNAL_UNFINISHED = Signal.valueOf(DecoderResult.class, "UNFINISHED");
    protected static final Signal SIGNAL_SUCCESS = Signal.valueOf(DecoderResult.class, "SUCCESS");

    public static final DecoderResult UNFINISHED = new DecoderResult(SIGNAL_UNFINISHED);
    public static final DecoderResult SUCCESS = new DecoderResult(SIGNAL_SUCCESS);

    public static DecoderResult failure(Throwable cause) {
        return new DecoderResult(ObjectUtil.checkNotNull(cause, "cause"));
    }

    private final Throwable cause;

    protected DecoderResult(Throwable cause) {
        this.cause = ObjectUtil.checkNotNull(cause, "cause");
    }

    public boolean isFinished() {
        return cause != SIGNAL_UNFINISHED;
    }

    public boolean isSuccess() {
        return cause == SIGNAL_SUCCESS;
    }

    public boolean isFailure() {
        return cause != SIGNAL_SUCCESS && cause != SIGNAL_UNFINISHED;
    }

    public Throwable cause() {
        if (isFailure()) {
            return cause;
        } else {
            return null;
        }
    }

    @Override
    public String toString() {
        if (isFinished()) {
            if (isSuccess()) {
                return "success";
            }

            String cause = cause().toString();
            return new StringBuilder(cause.length() + 17)
                .append("failure(")
                .append(cause)
                .append(')')
                .toString();
        } else {
            return "unfinished";
        }
    }
}