go.temporal.io/server/common/dynamicconfig/deepcopy.go
78 LOC · 58 covered · 20 uncovered · 14 ranges · 22919 concepts · 7 introducers · 11231 tests
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package dynamicconfig
import (
"fmt"
"reflect"
"time"
)
// deepCopyForMapstructure does a simple deep copy of T. Fancy cases (anything other than plain old data)
// is not handled and will panic.
// nolint:revive // this will be triggered from a static initializer before it can be triggered from production code
return deepCopyValue(reflect.ValueOf(t)).Interface().(T)
}
switch v.Kind() {
case reflect.Bool, reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
nv := reflect.New(v.Type()).Elem()
nv.Set(v)
return nv
nv := reflect.New(v.Type()).Elem()
for i := range v.Len() {
nv.Index(i).Set(deepCopyValue(v.Index(i)))
}
return nv
if v.IsNil() {
return v
}
for i := v.MapRange(); i.Next(); {
nv.SetMapIndex(i.Key(), deepCopyValue(i.Value()))
}
return nv
if v.IsNil() {
}
if v.IsNil() {
return v
}
for i := range v.Len() {
nv.Index(i).Set(deepCopyValue(v.Index(i)))
}
return nv
// Special case for time.Time: it has unexported fields so we can't copy it field by
// field, but we can copy zero values (which is all we need for default values).
if v.Type() == reflect.TypeFor[time.Time]() {
if v.Interface().(time.Time).IsZero() {
return reflect.ValueOf(time.Time{})
}
// nolint:forbidigo // this will be triggered from a static initializer before it can be triggered from production code
panic(fmt.Sprintf("Can't deep copy non-zero time.Time: %v", v.Interface()))
}
for i := range v.Type().NumField() {
nv.Field(i).Set(deepCopyValue(v.Field(i)))
}
return nv
case reflect.Interface, reflect.Func, reflect.Chan:
// only nil values of any other reference types allowed!
if v.IsNil() {
return v
}
default:
// nolint:forbidigo // this will be triggered from a static initializer before it can be triggered from production code
panic(fmt.Sprintf("Can't deep copy value of type %s: %v", v.Type(), v))
}
}