| /** |
| * 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.util.Iterator; |
| import scala.Tuple2; |
| import org.apache.spark.api.java.function.FlatMapFunction; |
| import org.apache.spark.api.java.function.PairFlatMapFunction; |
| |
| |
| abstract class FmFunction<T,R> implements FlatMapFunction<T,R> { |
| abstract Iterator<R> eval ( T t ) throws Exception; |
| |
| public Iterable<R> call ( final T t ) throws Exception { |
| return new Iterable<R>() { |
| public Iterator<R> iterator() { |
| try { |
| return eval(t); |
| } catch (Exception ex) { |
| throw new Error(ex); |
| } |
| } |
| }; |
| } |
| } |
| |
| abstract class PairFmFunction<T,K,V> implements PairFlatMapFunction<T,K,V> { |
| abstract Iterator<Tuple2<K,V>> eval ( T t ) throws Exception; |
| |
| public Iterable<Tuple2<K,V>> call ( final T t ) throws Exception { |
| return new Iterable<Tuple2<K,V>>() { |
| public Iterator<Tuple2<K,V>> iterator() { |
| try { |
| return eval(t); |
| } catch (Exception ex) { |
| throw new Error(ex); |
| } |
| } |
| }; |
| } |
| } |