model/modeljson/internal/keyvalue.go

// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 modeljson

import (
	"github.com/elastic/apm-data/model/modelpb"
	"go.elastic.co/fastjson"
)

type KeyValueSlice []*modelpb.KeyValue

func (s *KeyValueSlice) MarshalFastJSON(w *fastjson.Writer) error {
	var firstErr error
	w.RawByte('{')
	{
		for i, kv := range *s {
			if i != 0 {
				w.RawByte(',')
			}
			w.String(kv.Key)
			w.RawByte(':')
			if err := fastjson.Marshal(w, kv.Value.AsInterface()); err != nil && firstErr == nil {
				firstErr = err
			}
		}
	}
	w.RawByte('}')
	return firstErr
}