20 lines
362 B
JavaScript
20 lines
362 B
JavaScript
export class SingletonManagerClass {
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constructor() {
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this._map = new Map();
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}
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set(key, value) {
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if (this.has(key)) {
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throw new Error(`The key "${key}" is already defined and can not be overridden.`);
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}
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this._map.set(key, value);
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}
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get(key) {
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return this._map.get(key);
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}
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has(key) {
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return this._map.has(key);
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}
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}
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