func (trs *teeDataSource) ReadValue(ref ref.Ref) types.Value {
c := trs.source.Get(ref)
if c.IsEmpty() {
return nil
}
trs.sink.Put(c)
return types.DecodeChunk(c, trs)
}
// ReadValue reads and decodes a value from ds. It is not considered an error for the requested chunk to be empty; in this case, the function simply returns nil.
func (ds *dataStoreCommon) ReadValue(r ref.Ref) types.Value {
v := types.DecodeChunk(ds.cs.Get(r), ds)
checkAndSet := func(reachable ref.Ref, entry chunkCacheEntry) {
if ds.checkCache(reachable) == nil {
ds.setCache(reachable, entry)
}
}
var entry chunkCacheEntry = absentChunk{}
if v != nil {
entry = presentChunk(v.Type())
for _, reachable := range v.Chunks() {
checkAndSet(reachable.TargetRef(), presentChunk(getTargetType(reachable)))
}
}
checkAndSet(r, entry)
return v
}
