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interface.go
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interface.go
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package circonus
import "log"
type interfaceList []interface{}
type interfaceMap map[string]interface{}
// newInterfaceMap returns a helper type that has methods for common operations
// for accessing data.
func newInterfaceMap(l interface{}) interfaceMap {
return interfaceMap(l.(map[string]interface{}))
}
// CollectList returns []string of values that matched the key attrName.
// interfaceList most likely came from a schema.TypeSet.
func (l interfaceList) CollectList(attrName schemaAttr) []string {
stringList := make([]string, 0, len(l))
for _, mapRaw := range l {
mapAttrs := mapRaw.(map[string]interface{})
if v, ok := mapAttrs[string(attrName)]; ok {
stringList = append(stringList, v.(string))
}
}
return stringList
}
// List returns a list of values in a Set as a string slice
func (l interfaceList) List() []string {
stringList := make([]string, 0, len(l))
for _, e := range l {
switch e.(type) {
case string:
stringList = append(stringList, e.(string))
case []interface{}:
for _, v := range e.([]interface{}) {
stringList = append(stringList, v.(string))
}
default:
log.Printf("[ERROR] PROVIDER BUG: unable to convert %#v to list", e)
return nil
}
}
return stringList
}
// CollectList returns []string of values that matched the key attrName.
// interfaceMap most likely came from a schema.TypeSet.
func (m interfaceMap) CollectList(attrName schemaAttr) []string {
stringList := make([]string, 0, len(m))
for _, mapRaw := range m {
mapAttrs := mapRaw.(map[string]interface{})
if v, ok := mapAttrs[string(attrName)]; ok {
stringList = append(stringList, v.(string))
}
}
return stringList
}
// CollectMap returns map[string]string of values that matched the key attrName.
// interfaceMap most likely came from a schema.TypeSet.
func (m interfaceMap) CollectMap(attrName schemaAttr) map[string]string {
var mergedMap map[string]string
if attrRaw, ok := m[string(attrName)]; ok {
attrMap := attrRaw.(map[string]interface{})
mergedMap = make(map[string]string, len(m))
for k, v := range attrMap {
mergedMap[k] = v.(string)
}
}
if len(mergedMap) == 0 {
return nil
}
return mergedMap
}