lookup(selector: Selector): Snapshot {
const snapshot = RelayReader.read(this._recordSource, selector);
if (__DEV__) {
deepFreeze(snapshot);
}
return snapshot;
}
function lookupSelector(source, selector): ?SelectorData {
const selectorData = RelayReader.read(source, selector).data;
if (__DEV__) {
const deepFreeze = require('deepFreeze');
if (selectorData) {
deepFreeze(selectorData);
}
}
return selectorData;
}
_updateSubscription(subscription: Subscription): void {
const {callback, snapshot} = subscription;
if (!hasOverlappingIDs(snapshot, this._updatedRecordIDs)) {
return;
}
const {data, seenRecords} = RelayReader.read(this._recordSource, snapshot);
const nextData = recycleNodesInto(snapshot.data, data);
const nextSnapshot = {
...snapshot,
data: nextData,
seenRecords,
};
if (__DEV__) {
deepFreeze(nextSnapshot);
}
subscription.snapshot = nextSnapshot;
if (nextSnapshot.data !== snapshot.data) {
callback(nextSnapshot);
}
}