forked from vmware/vic
/
set.go
81 lines (66 loc) · 1.58 KB
/
set.go
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// Copyright 2017 VMware, Inc. All Rights Reserved.
//
// 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 registry
type Set []Entry
type Merger interface {
Merge(Entry, Entry) (Entry, error)
}
type defaultMerger struct{}
func (m *defaultMerger) Merge(orig, other Entry) (Entry, error) {
if orig.String() == other.String() {
return other, nil
}
return nil, nil
}
func (s Set) Match(m string) bool {
for _, e := range s {
if e.Match(m) {
return true
}
}
return false
}
func (s Set) Merge(other Set, merger Merger) (Set, error) {
if merger == nil {
merger = &defaultMerger{}
}
res := make([]Entry, len(s))
var adds Set
copy(res, s)
for _, o := range other {
merged := false
for i := 0; i < len(res); i++ {
e, err := merger.Merge(res[i], o)
if err != nil {
return nil, err
}
if e != nil {
res[i] = e
merged = true
break
}
}
if !merged {
adds = append(adds, o)
}
}
return append(res, adds...), nil
}
func (s Set) Strings() []string {
res := make([]string, len(s))
for i := range s {
res[i] = s[i].String()
}
return res
}