}

type expiryOp interface {
	OpHash() uint64
}

type freeVersionTask struct {
	ObjectInfo
}

func (f freeVersionTask) OpHash() uint64 {
	return xxh3.HashString(f.TransitionedObject.Tier + f.TransitionedObject.Name)
}

func (n noncurrentVersionsTask) OpHash() uint64 {
	return xxh3.HashString(n.bucket + n.versions[0].ObjectName)
}

func (j jentry) OpHash() uint64 {

	hash := hashPath(path)
	if d.Cache == nil {
		d.Cache = make(map[string]dataUsageEntry, 100)
	}
	d.Cache[hash.Key()] = e
	if parent != "" {
		phash := hashPath(parent)
		p := d.Cache[phash.Key()]
		p.addChild(hash)
		d.Cache[phash.Key()] = p
	}
}

// replaceHashed add or replaces an entry to the cache based on its hash.
// If a parent is specified it will be added to that if not already there.