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Versions: 3
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Stored size: 1.86 KB
Contents
import { EMBER_METAL_TRACKED_PROPERTIES } from '@ember/canary-features';
const COMPUTED_PROPERTY_CACHED_VALUES = new WeakMap();
const COMPUTED_PROPERTY_LAST_REVISION = EMBER_METAL_TRACKED_PROPERTIES
? new WeakMap()
: undefined;
/**
Returns the cached value for a property, if one exists.
This can be useful for peeking at the value of a computed
property that is generated lazily, without accidentally causing
it to be created.
@method cacheFor
@static
@for @ember/object/internals
@param {Object} obj the object whose property you want to check
@param {String} key the name of the property whose cached value you want
to return
@return {Object} the cached value
@public
*/
export function getCacheFor(obj) {
let cache = COMPUTED_PROPERTY_CACHED_VALUES.get(obj);
if (cache === undefined) {
cache = new Map();
if (EMBER_METAL_TRACKED_PROPERTIES) {
COMPUTED_PROPERTY_LAST_REVISION.set(obj, new Map());
}
COMPUTED_PROPERTY_CACHED_VALUES.set(obj, cache);
}
return cache;
}
export function getCachedValueFor(obj, key) {
let cache = COMPUTED_PROPERTY_CACHED_VALUES.get(obj);
if (cache !== undefined) {
return cache.get(key);
}
}
export let setLastRevisionFor;
export let getLastRevisionFor;
if (EMBER_METAL_TRACKED_PROPERTIES) {
setLastRevisionFor = (obj, key, revision) => {
let lastRevision = COMPUTED_PROPERTY_LAST_REVISION.get(obj);
lastRevision.set(key, revision);
};
getLastRevisionFor = (obj, key) => {
let cache = COMPUTED_PROPERTY_LAST_REVISION.get(obj);
if (cache === undefined) {
return 0;
}
else {
let revision = cache.get(key);
return revision === undefined ? 0 : revision;
}
};
}
export function peekCacheFor(obj) {
return COMPUTED_PROPERTY_CACHED_VALUES.get(obj);
}
Version data entries
3 entries across 3 versions & 1 rubygems