| /* |
| * 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 |
| * |
| * https://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 org.apache.avro.mapred; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.mapred.OutputCollector; |
| |
| @SuppressWarnings("unchecked") |
| class MapCollector<OUT, K, V, KO, VO> extends AvroCollector<OUT> { |
| private final AvroWrapper<OUT> wrapper = new AvroWrapper<>(null); |
| private final AvroKey<K> keyWrapper = new AvroKey<>(null); |
| private final AvroValue<V> valueWrapper = new AvroValue<>(null); |
| private OutputCollector<KO, VO> collector; |
| private boolean isMapOnly; |
| |
| public MapCollector(OutputCollector<KO, VO> collector, boolean isMapOnly) { |
| this.collector = collector; |
| this.isMapOnly = isMapOnly; |
| } |
| |
| @Override |
| public void collect(OUT datum) throws IOException { |
| if (isMapOnly) { |
| wrapper.datum(datum); |
| collector.collect((KO) wrapper, (VO) NullWritable.get()); |
| } else { |
| // split a pair |
| Pair<K, V> pair = (Pair<K, V>) datum; |
| keyWrapper.datum(pair.key()); |
| valueWrapper.datum(pair.value()); |
| collector.collect((KO) keyWrapper, (VO) valueWrapper); |
| } |
| } |
| } |