var operationStateMachine = function()

in JSLib/src/cache.js [267:327]
40 lines of code
10 McCabe index (conditional complexity)

        var operationStateMachine = function (opTargetState, cacheState, data) {
            /// <summary>State machine that describes all operations common behavior.</summary>
            /// <param name="opTargetState" type="Object">Operation state to transition to.</param>
            /// <param name="cacheState" type="Object">Current cache state.</param>
            /// <param name="data" type="Object" optional="true">Additional data passed to the state.</param>

            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();
                    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);
                    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.
                    // DATAJS INTERNAL START 
                    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 {
                        // DATAJS INTERNAL END 
                        stateMachine(that, opTargetState, cacheState, data);
                        // DATAJS INTERNAL START
                    }
                    // DATAJS INTERNAL END
                    break;
            }
        };