public void changeState()

in core/src/main/java/org/apache/mina/session/AbstractIoSession.java [253:326]
59 lines of code
18 McCabe index (conditional complexity)

    public void changeState(SessionState to) {
        try {
            stateWriteLock.lock();

            switch (state) {
            case CREATED:
                switch (to) {
                case CONNECTED:
                case SECURING:
                case CLOSING:
                    state = to;
                    break;

                default:
                    throw new IllegalStateException("Cannot transit from " + state + " to " + to);
                }

                break;

            case CONNECTED:
                switch (to) {
                case SECURING:
                case CLOSING:
                    state = to;
                    break;

                default:
                    throw new IllegalStateException("Cannot transit from " + state + " to " + to);
                }

                break;

            case SECURING:
                switch (to) {
                case SECURED:
                case CLOSING:
                    state = to;
                    break;

                default:
                    throw new IllegalStateException("Cannot transit from " + state + " to " + to);
                }

                break;

            case SECURED:
                switch (to) {
                case CONNECTED:
                case SECURING:
                case CLOSING:
                    state = to;
                    break;

                default:
                    throw new IllegalStateException("Cannot transit from " + state + " to " + to);
                }

                break;
            case CLOSING:
                if (to != SessionState.CLOSED) {
                    throw new IllegalStateException("Cannot transit from " + state + " to " + to);
                }

                state = to;

                break;

            case CLOSED:
                throw new IllegalStateException("The session is already closed. cannot switch to " + to);
            }
        } finally {
            stateWriteLock.unlock();
        }
    }