-
Notifications
You must be signed in to change notification settings - Fork 664
/
versioned_database.go
34 lines (25 loc) · 1.03 KB
/
versioned_database.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
// Copyright (C) 2019-2021, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package manager
import (
"sort"
"github.com/ava-labs/avalanchego/database"
"github.com/ava-labs/avalanchego/version"
)
type VersionedDatabase struct {
Database database.Database
Version *version.Semantic
}
// Close the underlying database
func (db *VersionedDatabase) Close() error {
return db.Database.Close()
}
type innerSortDescendingVersionedDBs []*VersionedDatabase
// Less returns true if the version at index i is greater than the version at index j
// such that it will sort in descending order (newest version --> oldest version)
func (dbs innerSortDescendingVersionedDBs) Less(i, j int) bool {
return dbs[i].Version.Compare(dbs[j].Version) > 0
}
func (dbs innerSortDescendingVersionedDBs) Len() int { return len(dbs) }
func (dbs innerSortDescendingVersionedDBs) Swap(i, j int) { dbs[j], dbs[i] = dbs[i], dbs[j] }
func SortDescending(dbs []*VersionedDatabase) { sort.Sort(innerSortDescendingVersionedDBs(dbs)) }