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cleanup(ygot): render cleanups and minor improvements for reflect uses #831

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cleanup(ygot): render cleanups and minor improvements for reflect uses #831

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51 changes: 35 additions & 16 deletions ygot/render.go
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ import (
"errors"
"fmt"
"reflect"
"strconv"
"strings"

"github.com/openconfig/gnmi/errlist"
Expand Down Expand Up @@ -65,7 +66,7 @@ var (
// unionSingletonUnderlyingTypes stores the underlying types of the
// singleton (i.e. non-struct, non-slice, non-map) typedefs used to
// represent union subtypes for the "Simplified Union Leaf" way of
// representatiing unions in the Go generated code.
// representing unions in the Go generated code.
unionSingletonUnderlyingTypes = map[string]reflect.Type{
"UnionInt8": reflect.TypeOf(int8(0)),
"UnionInt16": reflect.TypeOf(int16(0)),
Expand Down Expand Up @@ -93,7 +94,10 @@ func (p *path) String() string {
if p.p.isPathElemPath() {
return prototext.Format(&gnmipb.Path{Elem: p.p.pathElemPath})
}
return fmt.Sprintf("%v", p.p.pathElemPath)

// If the path is not path element path, return the joined string (unique for keying)
// of the string slice path.
return strings.Join(p.p.stringSlicePath, "/")
}

// pathval combines path and the value for the relative or absolute path.
Expand Down Expand Up @@ -859,7 +863,7 @@ func EncodeTypedValue(val any, enc gnmipb.Encoding, opts ...EncodeTypedValueOpt)
if err != nil {
return nil, fmt.Errorf("cannot marshal enum, %v", err)
}
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_StringVal{en}}, nil
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_StringVal{StringVal: en}}, nil
}

vv := reflect.ValueOf(val)
Expand All @@ -871,9 +875,9 @@ func EncodeTypedValue(val any, enc gnmipb.Encoding, opts ...EncodeTypedValueOpt)
return nil, fmt.Errorf("cannot represent field value %v as TypedValue", val)
case vv.Type().Name() == BinaryTypeName:
// This is a binary type which is defined as a []byte, so we encode it as the bytes.
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_BytesVal{vv.Bytes()}}, nil
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_BytesVal{BytesVal: vv.Bytes()}}, nil
case vv.Type().Name() == EmptyTypeName:
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_BoolVal{vv.Bool()}}, nil
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_BoolVal{BoolVal: vv.Bool()}}, nil
case vv.Kind() == reflect.Slice:
sval, err := leaflistToSlice(vv, false)
if err != nil {
Expand All @@ -884,7 +888,7 @@ func EncodeTypedValue(val any, enc gnmipb.Encoding, opts ...EncodeTypedValueOpt)
if err != nil {
return nil, err
}
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_LeaflistVal{arr}}, nil
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_LeaflistVal{LeaflistVal: arr}}, nil
case util.IsValueStructPtr(vv):
nv, err := unwrapUnionInterfaceValue(vv, false)
if err != nil {
Expand All @@ -893,7 +897,7 @@ func EncodeTypedValue(val any, enc gnmipb.Encoding, opts ...EncodeTypedValueOpt)
vv = reflect.ValueOf(nv)
// Apart from binary, all other possible union subtypes are scalars or typedefs of scalars.
if vv.Type().Name() == BinaryTypeName {
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_BytesVal{vv.Bytes()}}, nil
return &gnmipb.TypedValue{Value: &gnmipb.TypedValue_BytesVal{BytesVal: vv.Bytes()}}, nil
}
case util.IsValuePtr(vv):
vv = vv.Elem()
Expand Down Expand Up @@ -1246,9 +1250,6 @@ func rewriteModName(mod string, rules map[string]string) string {
// there are modules to be prepended, it also returns the module to which the
// field belongs. It will also return an error if it encounters one.
func prependmodsJSON(fType reflect.StructField, parentMod string, args jsonOutputConfig) ([][]string, string, error) {
var prependmods [][]string
var chMod string

mapModules, err := structTagToLibModules(fType, args.rfc7951Config.PreferShadowPath)
if err != nil {
return nil, "", fmt.Errorf("%s: %v", fType.Name, err)
Expand All @@ -1257,8 +1258,11 @@ func prependmodsJSON(fType reflect.StructField, parentMod string, args jsonOutpu
return nil, "", nil
}

for _, modulePath := range mapModules {
var prependmod []string
prependmods := make([][]string, len(mapModules))
var chMod string

for idx, modulePath := range mapModules {
prependmod := make([]string, modulePath.Len())
prevMod := parentMod
for i := 0; i != modulePath.Len(); i++ {
mod, err := modulePath.StringElemAt(i)
Expand All @@ -1274,12 +1278,12 @@ func prependmodsJSON(fType reflect.StructField, parentMod string, args jsonOutpu
} else {
prevMod = mod
}
prependmod = append(prependmod, mod)
prependmod[i] = mod
}
if chMod != "" && prevMod != chMod {
return nil, "", fmt.Errorf("%s: child modules between all paths are not equal: %v", fType.Name, mapModules)
}
prependmods = append(prependmods, prependmod)
prependmods[idx] = prependmod
chMod = prevMod
}
return prependmods, chMod, nil
Expand Down Expand Up @@ -1415,8 +1419,20 @@ func structJSON(s GoStruct, parentMod string, args jsonOutputConfig) (map[string
// and float64 values are represented as strings.
func writeIETFScalarJSON(i any) any {
switch reflect.ValueOf(i).Kind() {
case reflect.Uint64, reflect.Int64, reflect.Float64:
case reflect.Float64:
return fmt.Sprintf("%v", i)
case reflect.Int64:
if val, ok := i.(int64); ok {
return strconv.FormatInt(int64(val), 10)
}

return fmt.Sprintf("%d", i)
case reflect.Uint64:
if val, ok := i.(uint64); ok {
return strconv.FormatUint(uint64(val), 10)
}

return fmt.Sprintf("%d", i)
}
return i
}
Expand Down Expand Up @@ -1635,14 +1651,17 @@ func jsonValue(field reflect.Value, parentMod string, args jsonOutputConfig) (an
if err != nil {
errs.Add(err)
}
case reflect.String:
value = field.Elem().String()
case reflect.Bool:
value = field.Elem().Bool()
default:
value = field.Elem().Interface()
if args.jType == RFC7951 {
value = writeIETFScalarJSON(value)
}
}
case reflect.Slice:

isAnnotationSlice := func(v reflect.Value) bool {
annoT := reflect.TypeOf((*Annotation)(nil)).Elem()
return v.Type().Elem().Implements(annoT)
Expand Down