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ReflectionBasedDeepCopy.go
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/
ReflectionBasedDeepCopy.go
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package lib
import (
"reflect"
)
type DeepCopyable interface {
DeepCopy() DeepCopyable
}
// DeepCopy recursively copies the given struct, slices, arrays, maps and pointers
func DeepCopy(src interface{}) interface{} {
srcValue := reflect.ValueOf(src)
switch srcValue.Kind() {
case reflect.Slice, reflect.Array:
// Handle slices and arrays
dst := reflect.MakeSlice(srcValue.Type(), srcValue.Len(), srcValue.Len())
for i := 0; i < srcValue.Len(); i++ {
dst.Index(i).Set(reflect.ValueOf(DeepCopy(srcValue.Index(i).Interface())))
}
return dst.Interface()
case reflect.Map:
// Handle maps
dst := reflect.MakeMap(srcValue.Type())
for _, key := range srcValue.MapKeys() {
dstKey := reflect.ValueOf(DeepCopy(key.Interface()))
dstValue := reflect.ValueOf(DeepCopy(srcValue.MapIndex(key).Interface()))
dst.SetMapIndex(dstKey, dstValue)
}
return dst.Interface()
case reflect.Ptr:
// Handle pointers
if srcValue.IsNil() {
return nil
}
// Create a new pointer and copy the pointed value
dst := reflect.New(srcValue.Elem().Type())
dst.Elem().Set(reflect.ValueOf(DeepCopy(srcValue.Elem().Interface())))
return dst.Interface()
case reflect.Struct:
// Handle structs
dst := reflect.New(srcValue.Type()).Elem()
for i := 0; i < srcValue.NumField(); i++ {
srcField := srcValue.Field(i)
dstField := dst.Field(i)
if srcField.Kind() == reflect.Struct || srcField.Kind() == reflect.Slice || srcField.Kind() == reflect.Array || srcField.Kind() == reflect.Map || srcField.Kind() == reflect.Ptr {
dstField.Set(reflect.ValueOf(DeepCopy(srcField.Interface())))
} else {
dstField.Set(srcField)
}
}
return dst.Interface()
default:
// For other types, return the original value
return src
}
}