| /** |
| * 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.HashMap; |
| 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; |
| |
| /** |
| * |
| * This operator converts Map<K, String> to Map<K, Number> for numeric string values |
| * |
| * @displayName String to Number value converter for Map |
| * @category Tuple Converters |
| * @tags string |
| * |
| * @since 3.0.0 |
| */ |
| public class StringValueToNumberConverterForMap<K> extends BaseOperator |
| { |
| |
| /** |
| * Input port which accepts Map<K, Numeric String>. |
| */ |
| public final transient DefaultInputPort<Map<K, String>> input = new DefaultInputPort<Map<K, String>>() |
| { |
| @Override |
| public void process(Map<K, String> tuple) |
| { |
| Map<K, Number> outputMap = new HashMap<K, Number>(); |
| for (Entry<K, String> entry : tuple.entrySet()) { |
| String val = entry.getValue(); |
| if (val == null) { |
| return; |
| } |
| double tvalue = 0; |
| boolean errortuple = false; |
| try { |
| tvalue = Double.parseDouble(val); |
| } catch (NumberFormatException e) { |
| errortuple = true; |
| } |
| if (!errortuple) { |
| outputMap.put(entry.getKey(), tvalue); |
| } |
| } |
| output.emit(outputMap); |
| } |
| |
| }; |
| |
| /* |
| * Output port which outputs Map<K, Number> after converting numeric string to number |
| */ |
| public final transient DefaultOutputPort<Map<K, Number>> output = new DefaultOutputPort<Map<K, Number>>(); |
| } |