| /** |
| * 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 com.datatorrent.lib.stream; |
| |
| import java.util.ArrayList; |
| |
| import com.datatorrent.api.DefaultInputPort; |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.api.annotation.Stateless; |
| import com.datatorrent.lib.util.BaseKeyOperator; |
| |
| /** |
| * An implementation of BaseKeyOperator that breaks up an ArrayList tuple into Objects. |
| * <p> |
| * Takes in an ArrayList and emits each item in the array; mainly used for |
| * breaking up an ArrayList tuple into Objects. <br> |
| * It is a pass through operator<br> |
| * <br> |
| * <b>Ports</b>:<br> |
| * <b>data</b>: expects ArrayList<K>br> <b>item</b>: emits K<br> |
| * |
| * @displayName Array List To Item |
| * @category Stream Manipulators |
| * @tags arraylist, clone |
| * @since 0.3.3 |
| */ |
| @Stateless |
| public class ArrayListToItem<K> extends BaseKeyOperator<K> |
| { |
| /** |
| * Input data port that takes an arraylist. |
| */ |
| public final transient DefaultInputPort<ArrayList<K>> data = new DefaultInputPort<ArrayList<K>>() |
| { |
| /** |
| * Emit one item at a time |
| */ |
| @Override |
| public void process(ArrayList<K> tuple) |
| { |
| for (K k : tuple) { |
| item.emit(cloneKey(k)); |
| } |
| } |
| }; |
| |
| /** |
| * Output port that emits an array item. |
| */ |
| public final transient DefaultOutputPort<K> item = new DefaultOutputPort<K>(); |
| } |