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v1snapshot.go
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v1snapshot.go
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/*
* Copyright 2014-2015 Jason Woods.
*
* 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 core
import (
"sort"
)
type Snapshot struct {
Desc string
Entries map[string]interface{}
Keys []string
Subs map[string]*Snapshot
SubKeys []string
}
func NewSnapshot(desc string) *Snapshot {
return &Snapshot{
Desc: desc,
Entries: make(map[string]interface{}),
Keys: make([]string, 0),
Subs: make(map[string]*Snapshot),
SubKeys: make([]string, 0),
}
}
func (s *Snapshot) Sort() {
sort.Strings(s.Keys)
sort.Strings(s.SubKeys)
}
func (s *Snapshot) Description() string {
return s.Desc
}
func (s *Snapshot) AddEntry(name string, value interface{}) {
s.Entries[name] = value
s.Keys = append(s.Keys, name)
}
func (s *Snapshot) EntryByName(name string) (interface{}, bool) {
if v, ok := s.Entries[name]; ok {
return v, true
}
return nil, false
}
func (s *Snapshot) Entry(i int) (string, interface{}) {
if i < 0 || i >= len(s.Keys) {
panic("Out of bounds")
}
return s.Keys[i], s.Entries[s.Keys[i]]
}
func (s *Snapshot) NumEntries() int {
return len(s.Keys)
}
func (s *Snapshot) AddSub(sub *Snapshot) {
desc := sub.Description()
s.Subs[desc] = sub
s.SubKeys = append(s.SubKeys, desc)
}
func (s *Snapshot) Sub(i int) *Snapshot {
if i < 0 || i >= len(s.SubKeys) {
panic("Out of bounds")
}
return s.Subs[s.SubKeys[i]]
}
func (s *Snapshot) NumSubs() int {
return len(s.SubKeys)
}