| /* |
| * 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.pig.backend.hadoop.executionengine.mapReduceLayer; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.PathFilter; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; |
| import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat; |
| import org.apache.pig.backend.hadoop.executionengine.util.MapRedUtil; |
| |
| public class PigSequenceFileInputFormat<K, V> extends SequenceFileInputFormat<K, V> { |
| |
| /* |
| * This is to support multi-level/recursive directory listing until |
| * MAPREDUCE-1577 is fixed. |
| */ |
| @Override |
| protected List<FileStatus> listStatus(JobContext job) throws IOException { |
| Path[] dirs = FileInputFormat.getInputPaths(job); |
| if (dirs.length == 0) { |
| throw new IOException("No input paths specified in job"); |
| } |
| List<FileStatus> files = new ArrayList<FileStatus>(); |
| for (int i=0; i<dirs.length; ++i) { |
| Path p = dirs[i]; |
| FileSystem fs = p.getFileSystem(job.getConfiguration()); |
| FileStatus[] matches = fs.globStatus(p, hiddenFileFilter); |
| if (matches == null) { |
| throw new IOException("Input path does not exist: " + p); |
| } else if (matches.length == 0) { |
| throw new IOException("Input Pattern " + p + " matches 0 files"); |
| } else { |
| for (FileStatus globStat: matches) { |
| files.add(globStat); |
| } |
| } |
| } |
| return MapRedUtil.getAllFileRecursively(files, job.getConfiguration()); |
| } |
| |
| private static final PathFilter hiddenFileFilter = new PathFilter(){ |
| public boolean accept(Path p){ |
| String name = p.getName(); |
| return !name.startsWith("_") && !name.startsWith("."); |
| } |
| }; |
| } |