var operationStateMachine = function()

in lib/cache.js [296:352]
40 lines of code
10 McCabe index (conditional complexity)

    var operationStateMachine = function (opTargetState, cacheState, data) {

        switch (opTargetState) {
            case OPERATION_STATE_START:
                // Initial state of the operation. The operation will remain in this state until the cache has been fully initialized.
                if (cacheState !== CACHE_STATE_INIT) {
                    stateMachine(that, opTargetState, cacheState, data);
                }
                break;

            case OPERATION_STATE_WAIT:
                // Wait state indicating that the operation is active but waiting for an asynchronous operation to complete.
                stateMachine(that, opTargetState, cacheState, data);
                break;

            case OPERATION_STATE_CANCEL:
                // Cancel state.
                stateMachine(that, opTargetState, cacheState, data);
                that.fireCanceled();
                that.transition(OPERATION_STATE_END);
                break;

            case OPERATION_STATE_ERROR:
                // Error state. Data is expected to be an object detailing the error condition.
                stateMachine(that, opTargetState, cacheState, data);
                that.canceled = true;
                that.fireRejected(data);
                that.transition(OPERATION_STATE_END);
                break;

            case OPERATION_STATE_END:
                // Final state of the operation.
                if (that.oncomplete) {
                    that.oncomplete(that);
                }
                if (!that.canceled) {
                    that.fireResolved();
                }
                stateMachine(that, opTargetState, cacheState, data);
                break;

            default:
                // Any other state is passed down to the state machine describing the operation's specific behavior.

                if (true) {
                    // Check that the state machine actually handled the sate.
                    var handled = stateMachine(that, opTargetState, cacheState, data);
                    djsassert(handled, "Bad operation state: " + opTargetState + " cacheState: " + cacheState, this);
                } else {

                    stateMachine(that, opTargetState, cacheState, data);

                }

                break;
        }
    };