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metadata.go
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metadata.go
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// Copyright Project Harbor Authors
//
// 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 metadata
import (
"sync"
)
var metaDataOnce sync.Once
var metaDataInstance *CfgMetaData
// Instance - Get Instance, make it singleton because there is only one copy of metadata in an env
func Instance() *CfgMetaData {
metaDataOnce.Do(func() {
metaDataInstance = newCfgMetaData()
metaDataInstance.init()
})
return metaDataInstance
}
func newCfgMetaData() *CfgMetaData {
return &CfgMetaData{metaMap: make(map[string]Item)}
}
// CfgMetaData ...
type CfgMetaData struct {
metaMap map[string]Item
}
// init ...
func (c *CfgMetaData) init() {
c.initFromArray(ConfigList)
}
// initFromArray - Initial metadata from an array
func (c *CfgMetaData) initFromArray(items []Item) {
c.metaMap = make(map[string]Item)
for _, item := range items {
c.metaMap[item.Name] = item
}
}
// GetByName - Get current metadata of current name, if not defined, return false in second params
func (c *CfgMetaData) GetByName(name string) (*Item, bool) {
if item, ok := c.metaMap[name]; ok {
return &item, true
}
return nil, false
}
// GetAll - Get all metadata in current env
func (c *CfgMetaData) GetAll() []Item {
metaDataList := make([]Item, 0)
for _, value := range c.metaMap {
metaDataList = append(metaDataList, value)
}
return metaDataList
}