| /* |
| * 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.test.pigmix.mapreduce; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.hadoop.io.Text; |
| |
| /** |
| * A collection of static functions for use by the pigmix map reduce tasks. |
| */ |
| public class Library { |
| |
| public static List<Text> splitLine(Text line, char delimiter) { |
| String s = line.toString(); |
| List<Text> cols = new ArrayList<Text>(); |
| int start = 0; |
| for (int i = 0; i < s.length(); i++) { |
| if (s.charAt(i) == delimiter) { |
| if (start == i) cols.add(new Text()); // null case |
| else cols.add(new Text(s.substring(start, i))); |
| start = i + 1; |
| } |
| } |
| // Grab the last one. |
| if (start != s.length()) cols.add(new Text(s.substring(start))); |
| |
| return cols; |
| } |
| |
| public static Text mapLookup(Text mapCol, Text key) { |
| List<Text> kvps = splitLine(mapCol, ''); |
| |
| for (Text potential : kvps) { |
| // Split potential on ^D |
| List<Text> kv = splitLine(potential, ''); |
| if (kv.size() != 2) return null; |
| if (kv.get(0).equals(potential)) return kv.get(1); |
| } |
| |
| return null; |
| } |
| |
| |
| |
| } |