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carrier.go
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carrier.go
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package carrier
import (
"fmt"
"reflect"
)
//Transfer переводит значения из полей src в dst (связь по тэгу "tr")
func Transfer(src, dst interface{}) error {
if src == nil || dst == nil {
return fmt.Errorf("Value is nil")
}
in := reflect.ValueOf(src)
out := reflect.ValueOf(dst)
mapIn := make(map[string]reflect.Value)
mapOut := make(map[string]reflect.Value)
for i := 0; i < in.Elem().Type().NumField(); i++ {
if key := in.Elem().Type().Field(i).Tag.Get("tr"); key != "" {
mapIn[key] = in.Elem().Field(i).Addr()
}
}
for i := 0; i < out.Elem().Type().NumField(); i++ {
if key := out.Elem().Type().Field(i).Tag.Get("tr"); key != "" {
mapOut[key] = out.Elem().Field(i).Addr()
}
}
for i, v1 := range mapOut {
if v2, ok := mapIn[i]; ok {
if v1.Elem().IsZero() || v2.Elem().IsZero() {
return fmt.Errorf("Value is zero")
}
if v1.Elem().Type().String()[0] == '*' {
v1 = v1.Elem()
}
if v2.Elem().Type().String()[0] == '*' {
v2 = v2.Elem()
}
if v1.Elem().Type().String() == v2.Elem().Type().String() {
fmt.Println(v1.Elem(), v2.Elem())
v1.Elem().Set(v2.Elem())
} else {
return fmt.Errorf("Types are not equal")
}
}
}
return nil
}