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scope.go
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scope.go
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/**
* @license
* Copyright 2020 Dynatrace LLC
*
* 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 settings
import "reflect"
type ScopeAware interface {
SetScope(string)
GetScope() string
}
func SetScope(settings Settings, scope string) {
if scopeAware, ok := any(settings).(ScopeAware); ok {
scopeAware.SetScope(scope)
return
}
scopeField, _ := getScopeField(settings)
if !scopeField.IsValid() {
return
}
if scopeField.Type() == stringType {
scopeField.Set(reflect.ValueOf(scope))
} else if scopeField.Type() == stringPointerType {
scopeField.Set(reflect.ValueOf(&scope))
}
}
func GetScope(settings Settings) string {
if scopeAware, ok := any(settings).(ScopeAware); ok {
return scopeAware.GetScope()
}
scopeField, _ := getScopeField(settings)
if !scopeField.IsValid() {
return "environment"
}
if scopeField.Type() == stringType {
res := scopeField.Interface().(string)
if len(res) == 0 {
return "environment"
}
return res
}
if scopeField.Type() == stringPointerType {
pScope := scopeField.Interface().(*string)
if pScope == nil {
return "environment"
}
return *pScope
}
return "environment"
}
func getScopeField(settings Settings) (reflect.Value, string) {
rv := unref(reflect.ValueOf(settings))
t := rv.Type()
for idx := 0; idx < t.NumField(); idx++ {
tField := t.Field(idx)
tag := tField.Tag
scopeTag := tag.Get("scope")
if len(scopeTag) > 0 {
return rv.Field(idx), scopeTag
}
}
return reflect.Value{}, ""
}