| /** |
| * 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.converter; |
| |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import com.datatorrent.api.DefaultInputPort; |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.common.util.BaseOperator; |
| import com.datatorrent.lib.util.KeyValPair; |
| |
| /** |
| * |
| * This operator outputs key value pair for each entry in input Map |
| * |
| * @displayName Map to key-value pair converter |
| * @category Tuple Converters |
| * @tags key value |
| * |
| * @since 3.0.0 |
| */ |
| public class MapToKeyValuePairConverter<K, V> extends BaseOperator |
| { |
| |
| /** |
| * Input port which accepts Map<K, V>. |
| */ |
| public final transient DefaultInputPort<Map<K, V>> input = new DefaultInputPort<Map<K, V>>() |
| { |
| @Override |
| public void process(Map<K, V> tuple) |
| { |
| for (Entry<K, V> entry : tuple.entrySet()) { |
| output.emit(new KeyValPair<K, V>(entry.getKey(), entry.getValue())); |
| } |
| } |
| }; |
| |
| /* |
| * Output port which outputs KeyValue pair for each entry in Map |
| */ |
| public final transient DefaultOutputPort<KeyValPair<K, V>> output = new DefaultOutputPort<KeyValPair<K, V>>(); |
| } |