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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | 10x 10x 10x 10x 10x 2485x 10x 826x 826x 826x 826x 826x 10x 1x 1x 10x 1x 10x 10x 10x 2485x 2485x 2485x 2485x 2485x 2485x 2485x 2485x 816x 816x 816x 2485x | import { assert } from './assert.util';
import { isUndefined } from './utils';
declare let Reflect: {
getOwnMetadata(
key: string | symbol,
target: object,
propertyKey?: string | symbol,
): any;
defineMetadata(
key: string | symbol,
value: any,
target: object,
propertyKey?: string | symbol,
): void;
getOwnMetadataKeys(target: any, propertyKey?: string | symbol): string[];
};
// rough Reflect polyfill
if (
!Reflect.getOwnMetadata ||
!Reflect.defineMetadata ||
!Reflect.getOwnMetadataKeys
) {
const _meta = new Map<
any,
Map<string | symbol | undefined, Map<string, any>>
>();
Reflect.getOwnMetadata = function (
key: string,
target: object,
propertyKey?: string,
): any {
return _meta.get(target)?.get(propertyKey)?.get(key);
};
Reflect.defineMetadata = function (
key: string,
value: any,
target: object,
propertyKey?: string,
): void {
const tBucket = _meta.get(target) ?? new Map();
const pkBucket = tBucket.get(propertyKey) ?? new Map();
_meta.set(target, tBucket);
tBucket.set(propertyKey, pkBucket);
pkBucket.set(key, value);
};
Reflect.getOwnMetadataKeys = function (
target: object,
propertyKey?: string | symbol,
): string[] {
const pkBucket = _meta.get(target)?.get(propertyKey) ?? new Map();
return [...pkBucket.keys()];
};
}
export function getMetadataKeys(
target: object,
propertyKey?: string | symbol,
): string[] {
return Reflect.getOwnMetadataKeys(target, propertyKey);
}
export function defineMetadata(
key: string,
value: any,
target: object,
propertyKey?: string | symbol,
): void;
export function defineMetadata(
key: string,
value: any,
target: object,
propertyKey?: string | symbol,
) {
return Reflect.defineMetadata(key, value, target, propertyKey);
}
export function getMetadata<T>(
key: string | symbol,
target: object,
valueGenerator?: () => T,
save?: boolean,
): T;
export function getMetadata<T>(
key: string | symbol,
target: object,
propertyKey: string | symbol,
valueGenerator?: () => T,
save?: boolean,
): T;
export function getMetadata<T>(
key: string | symbol,
target: object,
propertyKey?: string | symbol | (() => T),
valueGenerator?: (() => T) | boolean,
save = true,
): T {
let _propertyKey = propertyKey as string | symbol | undefined;
let _valueGenerator = valueGenerator as () => T | void;
Iif (typeof valueGenerator === 'boolean') {
save = valueGenerator;
}
Iif (typeof propertyKey === 'function') {
_valueGenerator = propertyKey;
_propertyKey = undefined;
}
_valueGenerator = _valueGenerator ?? (() => {});
assert(!!target);
let value = Reflect.getOwnMetadata(key, target, _propertyKey);
if (isUndefined(value)) {
value = _valueGenerator?.();
if (save && value !== undefined) {
Reflect.defineMetadata(key, value, target, _propertyKey);
}
}
return value;
}
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