| /** |
| * 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 org.apache.hadoop.mapred.pipes; |
| |
| import java.io.*; |
| import java.util.*; |
| |
| import org.apache.hadoop.fs.*; |
| import org.apache.hadoop.io.*; |
| import org.apache.hadoop.mapred.*; |
| |
| /** |
| * This is a support class to test Hadoop Pipes when using C++ RecordReaders. |
| * It defines an InputFormat with InputSplits that are just strings. The |
| * RecordReaders are not implemented in Java, naturally... |
| */ |
| public class WordCountInputFormat |
| extends FileInputFormat<IntWritable, Text> { |
| |
| static class WordCountInputSplit implements InputSplit { |
| private String filename; |
| WordCountInputSplit() { } |
| WordCountInputSplit(Path filename) { |
| this.filename = filename.toUri().getPath(); |
| } |
| public void write(DataOutput out) throws IOException { |
| Text.writeString(out, filename); |
| } |
| public void readFields(DataInput in) throws IOException { |
| filename = Text.readString(in); |
| } |
| public long getLength() { return 0L; } |
| public String[] getLocations() { return new String[0]; } |
| } |
| |
| public InputSplit[] getSplits(JobConf conf, |
| int numSplits) throws IOException { |
| ArrayList<InputSplit> result = new ArrayList<InputSplit>(); |
| FileSystem local = FileSystem.getLocal(conf); |
| for(Path dir: getInputPaths(conf)) { |
| for(FileStatus file: local.listStatus(dir)) { |
| result.add(new WordCountInputSplit(file.getPath())); |
| } |
| } |
| return result.toArray(new InputSplit[result.size()]); |
| } |
| public RecordReader<IntWritable, Text> getRecordReader(InputSplit split, |
| JobConf conf, |
| Reporter reporter) { |
| return new RecordReader<IntWritable, Text>(){ |
| public boolean next(IntWritable key, Text value) throws IOException { |
| return false; |
| } |
| public IntWritable createKey() { |
| return new IntWritable(); |
| } |
| public Text createValue() { |
| return new Text(); |
| } |
| public long getPos() { |
| return 0; |
| } |
| public void close() { } |
| public float getProgress() { |
| return 0.0f; |
| } |
| }; |
| } |
| } |