| 1 | import { CacheDelegate } from "./interfaces";
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| 2 |
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| 3 | export default class Cache<K, CK, V> {
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| 4 | public hits = 0;
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| 5 | public misses = 0;
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| 6 | private store = new Map<CK, V>();
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| 7 | constructor(private delegate: CacheDelegate<K, CK, V>) {}
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| 8 |
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| 9 | public get(key: K): V {
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| 10 | const cacheKey = this.delegate.cacheKey(key);
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| 11 | let value = this.store.get(cacheKey);
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| 12 | if (value === undefined) {
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| 13 | this.misses++;
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| 14 | value = this.delegate.create(key);
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| 15 | this.store.set(cacheKey, value);
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| 16 | } else {
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| 17 | this.hits++;
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| 18 | }
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| 19 | return value;
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| 20 | }
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| 21 |
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| 22 | public clear() {
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| 23 | this.store.clear();
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| 24 | }
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| 25 | }
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