| /** |
| * 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.mrql; |
| |
| import java.io.IOException; |
| import org.apache.hadoop.fs.*; |
| import org.apache.hadoop.conf.Configuration; |
| |
| |
| /** A DataSource used for processing the range min..max */ |
| final public class GeneratorDataSource extends DataSource { |
| GeneratorDataSource ( int source_num, String path, Configuration conf ) { |
| super(source_num,path,Evaluator.evaluator.generatorInputFormat(),conf); |
| } |
| |
| GeneratorDataSource ( String path, Configuration conf ) { |
| super(-1,path,Evaluator.evaluator.generatorInputFormat(),conf); |
| } |
| |
| public static long size ( Path path, Configuration conf ) throws IOException { |
| // each file generates range_split_size long integers |
| FileStatus s = path.getFileSystem(conf).getFileStatus(path); |
| if (!s.isDir()) |
| return Config.range_split_size*8; |
| long size = 0; |
| for ( FileStatus fs: path.getFileSystem(conf).listStatus(path) ) |
| size += Config.range_split_size*8; |
| return size; |
| } |
| |
| public String toString () { |
| return "Generator"+separator+source_num+separator+path; |
| } |
| } |