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namedEncoder.go
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namedEncoder.go
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// Copyright 2018 Istio 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 yaml
import (
"fmt"
"time"
"github.com/gogo/protobuf/proto"
"github.com/gogo/protobuf/types"
)
var namedEncoderRegistry = make(map[string]namedEncoderFn)
func registerNE(msgname string, encode encodeFunc) {
name := "." + msgname
ne := &namedEncoder{name: name, enc: encode}
namedEncoderRegistry[name] = ne.encode
}
type encodeFunc func(name string, v string) ([]byte, error)
type namedEncoder struct {
name string
enc encodeFunc
}
func (n namedEncoder) encode(data interface{}) ([]byte, error) {
v, ok := data.(string)
if !ok {
return nil, unexpectedTypeError(n.name, "string", data)
}
return n.enc(n.name, v)
}
func init() {
registerNE(proto.MessageName((*types.Duration)(nil)), func(name string, v string) ([]byte, error) {
var d time.Duration
var err error
if d, err = time.ParseDuration(v); err != nil {
return nil, err
}
return types.DurationProto(d).Marshal()
})
registerNE(proto.MessageName((*types.Timestamp)(nil)), func(name string, v string) ([]byte, error) {
var d time.Time
var err error
if d, err = time.Parse(time.RFC3339, v); err != nil {
return nil, err
}
var ts *types.Timestamp
if ts, err = types.TimestampProto(d); err != nil {
return nil, err
}
return ts.Marshal()
})
}
func unexpectedTypeError(msgName, wantType string, data interface{}) error {
return fmt.Errorf("message type '%s' got:type '%T' want '%s'", msgName, data, wantType)
}