golang deep-copy interface with reflect

deep_copy.go

package main

import (
	"reflect"
	"fmt"
)

type Cloneable interface {
	Clone(inter interface{}) interface{}
}

type Element interface {
	Cloneable
	HashCode() int64
	Value() int64
}

type Entity struct {}

func (e *Entity) Clone(inter interface{}) interface{} {
	nInter := reflect.New(reflect.TypeOf(inter).Elem())

	val := reflect.ValueOf(inter).Elem()
	nVal := nInter.Elem()
	for i := 0; i < val.NumField(); i++ {
		nvField := nVal.Field(i)
		nvField.Set(val.Field(i))
	}

	return nInter.Interface()
}

// Through HashCode function, to compare whether equals
// In this case, no implement it
func (e *Entity) HashCode() int64 { return 1 }
// Through HashCode function, to compare priority
// In this case, no implement it
func (e *Entity) Value() int64 { return 1 }

type Apple struct {
	Entity
	Weight int
	Height int
}

func (apple *Apple) HashCode() int64 {return 1}
func (apple *Apple) Value() int64 {return 1}

func main() {
	apple := &Apple{Weight:11, Height:14}
	nApple := apple.Clone(apple).(*Apple)

	apple.Weight = 1111
	fmt.Println(apple)
	fmt.Println(nApple)
}