learning/katas/go/Core Transforms/Map/ParDo OneToMany/pkg/task/task.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 task

import (
	"github.com/apache/beam/sdks/go/pkg/beam"
	"strings"
)

func ApplyTransform(s beam.Scope, input beam.PCollection) beam.PCollection {
	return beam.ParDo(s, tokenizeFn, input)
}

func tokenizeFn(input string, emit func(out string)) {
	tokens := strings.Split(input, " ")
	for _, k := range tokens {
		emit(k)
	}
}