| /* |
| * 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; |
| |
| import java.io.IOException; |
| import org.apache.hadoop.io.WritableComparable; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.lib.input.FileSplit; |
| |
| import org.apache.pig.classification.InterfaceAudience; |
| import org.apache.pig.classification.InterfaceStability; |
| |
| /** |
| * This class provides an implementation of OrderedLoadFunc interface |
| * which can be optionally re-used by LoadFuncs that use FileInputFormat, by |
| * having this as a super class |
| * @since Pig 0.7 |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving // Since we haven't done outer join for merge join yet |
| public abstract class FileInputLoadFunc extends LoadFunc implements OrderedLoadFunc { |
| |
| @Override |
| public WritableComparable<?> getSplitComparable(InputSplit split) |
| throws IOException{ |
| FileSplit fileSplit = null; |
| if(split instanceof FileSplit){ |
| fileSplit = (FileSplit)split; |
| }else{ |
| throw new RuntimeException("LoadFunc expected split of type FileSplit"); |
| } |
| |
| return new FileSplitComparable( |
| fileSplit.getPath().toString(), |
| fileSplit.getStart() |
| ); |
| } |
| |
| } |