/
helpers.go
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/
helpers.go
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// Copyright Project Contour Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package protobuf provides helpers for working with golang/protobuf types.
package protobuf
import (
"reflect"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"google.golang.org/protobuf/types/known/wrapperspb"
)
// UInt32OrDefault returns a wrapped UInt32Value. If val is 0, def is wrapped and returned.
func UInt32OrDefault(val, def uint32) *wrapperspb.UInt32Value {
switch val {
case 0:
return wrapperspb.UInt32(def)
default:
return wrapperspb.UInt32(val)
}
}
// UInt32OrNil returns a wrapped UInt32Value. If val is 0, nil is returned
func UInt32OrNil(val uint32) *wrapperspb.UInt32Value {
switch val {
case 0:
return nil
default:
return wrapperspb.UInt32(val)
}
}
// AsMessages casts the given slice of values (that implement the proto.Message
// interface) to a slice of proto.Message. If the length of the slice is 0, it
// returns nil.
func AsMessages(messages any) []proto.Message {
v := reflect.ValueOf(messages)
if v.Len() == 0 {
return nil
}
protos := make([]proto.Message, v.Len())
for i := range protos {
protos[i] = v.Index(i).Interface().(proto.Message)
}
return protos
}
// MustMarshalAny marshals a protobuf into an any.Any type, panicking
// if that operation fails.
func MustMarshalAny(pb proto.Message) *anypb.Any {
a, err := anypb.New(pb)
if err != nil {
panic(err.Error())
}
return a
}