Fill a Golang struct's string fields' values according with fieldss names.

fill_struct_string.go

package common

import (
	"fmt"
	"go/token"
	"reflect"
)

// FillStructString set values of string fields of a struct to the field names.
func FillStructString(value interface{}) {
	v := reflect.ValueOf(value)
	if v.Kind() != reflect.Ptr {
		panic("require a pointer")
	}
	v = v.Elem()
	if v.Kind() != reflect.Struct {
		panic("require pointer to a struct")
	}

	typ := v.Type()
	for i := 0; i < typ.NumField(); i++ {
		field := typ.Field(i)
		if field.Anonymous {
			FillStructString(v.Field(i).Addr().Interface())
			continue
		}
		if field.Type.Kind() != reflect.String {
			continue
		}
		if !token.IsExported(field.Name) {
			continue
		}
		v.Field(i).SetString(field.Name)
	}
}

// CommonStatus are status shared by resources.
type CommonStatus struct {
	Active        string
	Building      string
	BuildingError string
	Deleting      string
	DeletingError string
	Deleted       string
}

// DataSourceStatusDefinition defines status.
type DataSourceStatusDefinition struct {
	CommonStatus
	Initializing string
}

// DataSourceStatus definitions.
var DataSourceStatus = new(DataSourceStatusDefinition)

func init() {
	common.FillStructString(DataSourceStatus)
	fmt.Printf("%+v\n", DataSourceStatus)
}