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var Map = require('./es6.map');
var $export = require('./_export');
var shared = require('./_shared')('metadata');
var store = shared.store || (shared.store = new (require('./es6.weak-map'))());
var getOrCreateMetadataMap = function (target, targetKey, create) {
var targetMetadata = store.get(target);
if (!targetMetadata) {
if (!create) return undefined;
store.set(target, targetMetadata = new Map());
}
var keyMetadata = targetMetadata.get(targetKey);
if (!keyMetadata) {
if (!create) return undefined;
targetMetadata.set(targetKey, keyMetadata = new Map());
} return keyMetadata;
};
var ordinaryHasOwnMetadata = function (MetadataKey, O, P) {
var metadataMap = getOrCreateMetadataMap(O, P, false);
return metadataMap === undefined ? false : metadataMap.has(MetadataKey);
};
var ordinaryGetOwnMetadata = function (MetadataKey, O, P) {
var metadataMap = getOrCreateMetadataMap(O, P, false);
return metadataMap === undefined ? undefined : metadataMap.get(MetadataKey);
};
var ordinaryDefineOwnMetadata = function (MetadataKey, MetadataValue, O, P) {
getOrCreateMetadataMap(O, P, true).set(MetadataKey, MetadataValue);
};
var ordinaryOwnMetadataKeys = function (target, targetKey) {
var metadataMap = getOrCreateMetadataMap(target, targetKey, false);
var keys = [];
if (metadataMap) metadataMap.forEach(function (_, key) { keys.push(key); });
return keys;
};
var toMetaKey = function (it) {
return it === undefined || typeof it == 'symbol' ? it : String(it);
};
var exp = function (O) {
$export($export.S, 'Reflect', O);
};
module.exports = {
store: store,
map: getOrCreateMetadataMap,
has: ordinaryHasOwnMetadata,
get: ordinaryGetOwnMetadata,
set: ordinaryDefineOwnMetadata,
keys: ordinaryOwnMetadataKeys,
key: toMetaKey,
exp: exp
};
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