StateMachine.js
33 lines
| 1.1 KiB
| application/javascript
|
JavascriptLexer
cin
|
r0 | define([ "dojo/_base/declare", "../safe", "../text/format" ], function(declare, safe, format) { | |
| return declare(null, { | |||
| states : null, | |||
| current : null, | |||
| constructor : function(opts) { | |||
| safe.argumentNotNull(opts, "opts"); | |||
| safe.argumentNotNull(opts.states, "opts.states"); | |||
| safe.argumentNotNull(opts.initial, "opts.initial"); | |||
| this.states = opts.states; | |||
| this.current = opts.initial; | |||
| if (safe.isNull(this.states[this.current])) | |||
| throw new Error("Invalid initial state " + this.current); | |||
| }, | |||
| move : function(input, noThrow) { | |||
| safe.argumentNotNull(input, "input"); | |||
| var next = this.states[this.current][input]; | |||
| if(safe.isNull(next)) { | |||
| if (noThrow) | |||
| return false; | |||
| else | |||
| throw new Error(format("Invalid transition {0}-{1}->?", this.current, input)); | |||
| } else { | |||
| this.current = next; | |||
| return true; | |||
| } | |||
| } | |||
| }); | |||
| }); |