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Distinguish between ReadJSON vs ReadJSONPtr. The latter expects a non-nil pointer to write into. The former creates new things intelligently

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This commit is contained in:
Jae Kwon
2015-07-11 16:32:46 -07:00
parent 4504e6a9f4
commit 24acda1afc
4 changed files with 33 additions and 5 deletions
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30
binary/binary.go
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@ -16,6 +16,10 @@ var ErrBinaryReadSizeUnderflow = errors.New("Error: binary read size underflow")
func ReadBinary(o interface{}, r io.Reader, n *int64, err *error) interface{} {
rv, rt := reflect.ValueOf(o), reflect.TypeOf(o)
if rv.Kind() == reflect.Ptr {
if rv.IsNil() {
rv = reflect.New(rt.Elem())
o = rv.Interface()
}
readReflectBinary(rv, rt, Options{}, r, n, err)
return o
} else {
@ -51,10 +55,24 @@ func ReadJSON(o interface{}, bytes []byte, err *error) interface{} {
return ReadJSONObject(o, object, err)
}
func ReadJSONPtr(o interface{}, bytes []byte, err *error) interface{} {
var object interface{}
*err = json.Unmarshal(bytes, &object)
if *err != nil {
return o
}
return ReadJSONObjectPtr(o, object, err)
}
func ReadJSONObject(o interface{}, object interface{}, err *error) interface{} {
rv, rt := reflect.ValueOf(o), reflect.TypeOf(o)
if rv.Kind() == reflect.Ptr {
readReflectJSON(rv.Elem(), rt.Elem(), object, err)
if rv.IsNil() {
rv = reflect.New(rt.Elem())
o = rv.Interface()
}
readReflectJSON(rv, rt, object, err)
return o
} else {
ptrRv := reflect.New(rt)
@ -63,6 +81,16 @@ func ReadJSONObject(o interface{}, object interface{}, err *error) interface{} {
}
}
func ReadJSONObjectPtr(o interface{}, object interface{}, err *error) interface{} {
rv, rt := reflect.ValueOf(o), reflect.TypeOf(o)
if rv.Kind() == reflect.Ptr {
readReflectJSON(rv.Elem(), rt.Elem(), object, err)
return o
} else {
panic("ReadJSON(Object)Ptr expects o to be a pointer")
}
}
func WriteJSON(o interface{}, w io.Writer, n *int64, err *error) {
rv := reflect.ValueOf(o)
rt := reflect.TypeOf(o)