/
sort.go
59 lines (48 loc) · 1.63 KB
/
sort.go
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// Copyright (c) 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package managedresource
import (
"sort"
resourcesv1alpha1 "github.com/gardener/gardener/pkg/apis/resources/v1alpha1"
)
var _ = sort.Interface(referenceSorter{})
type referenceSorter struct {
keys []string
refs []resourcesv1alpha1.ObjectReference
}
func newReferenceSorter(refs []resourcesv1alpha1.ObjectReference) sort.Interface {
// compute keys only once
keys := make([]string, len(refs))
for i, ref := range refs {
keys[i] = objectKeyByReference(ref)
}
return referenceSorter{
keys: keys,
refs: refs,
}
}
func sortObjectReferences(refs []resourcesv1alpha1.ObjectReference) {
s := newReferenceSorter(refs)
sort.Sort(s)
}
func (r referenceSorter) Len() int {
return len(r.refs)
}
func (r referenceSorter) Less(i, j int) bool {
return r.keys[i] < r.keys[j]
}
func (r referenceSorter) Swap(i, j int) {
r.keys[i], r.keys[j] = r.keys[j], r.keys[i]
r.refs[i], r.refs[j] = r.refs[j], r.refs[i]
}