forked from bugthesystem/design-patterns-and-idioms-in-es6
/
memento.ats
48 lines (38 loc) · 920 Bytes
/
memento.ats
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import { Logger } from '../logger';
import { int, float } from '../lang';
export class Originator {
constructor() {
this.logger = new Logger();
}
set State(_state:string) {
this.state = _state;
}
get State():string {
return this.state;
}
set stateFromMemento(memento:Memento) {
this.state = memento.MementoState;
}
get stateToBeSavedMemento():Memento {
return (new Memento(this.state));
}
}
export class Memento {
constructor(_state:string) {
this.mementoState = _state;
}
get MementoState():string {
return this.mementoState;
}
}
export class CareTaker {
constructor() {
this.mementoList = [];
}
addStateToMementoList(_state:Memento) {
this.mementoList.push(_state);
}
getStateFromMementoList(index:int):Memento {
return this.mementoList[index];
}
}