learning/tour-of-beam/backend/internal/json.go

// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements.  See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF 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 internal

func (nt *NodeType) UnmarshalText(text []byte) error {
	switch string(text) {
	case "unit":
		*nt = NODE_UNIT
	case "group":
		*nt = NODE_GROUP
	default:
		panic("can't parse node type")
	}
	return nil
}

func (nt NodeType) MarshalText() ([]byte, error) {
	var typ string
	switch nt {
	case NODE_UNIT:
		typ = "unit"
	case NODE_GROUP:
		typ = "group"
	default:
		panic("NodeType not defined")
	}
	return []byte(typ), nil
}