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versioned_database.go
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versioned_database.go
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// Copyright (C) 2019-2022, 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))
}