| /* |
| * 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.physicalLayer.relationalOperators; |
| |
| import java.io.IOException; |
| |
| import org.apache.pig.StoreFuncInterface; |
| |
| /** |
| * This class is used to specify the actual behavior of the store |
| * operator just when ready to start execution. |
| */ |
| public abstract class POStoreImpl { |
| /** |
| * Set up the storer |
| * @param store - the POStore object |
| * @throws IOException |
| */ |
| public abstract StoreFuncInterface createStoreFunc(POStore store) |
| throws IOException; |
| |
| /** |
| * At the end of processing, the outputstream is closed |
| * using this method |
| * @throws IOException |
| */ |
| public void tearDown() throws IOException{ |
| } |
| |
| /** |
| * To perform cleanup when there is an error. |
| * Uses the FileLocalizer method which only |
| * deletes the file but not the dirs created |
| * with it. |
| * @throws IOException |
| */ |
| public void cleanUp() throws IOException{ |
| } |
| } |