| /** |
| * 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.storm.streams.operations.mappers; |
| |
| import org.apache.storm.tuple.Tuple; |
| import org.apache.storm.tuple.Values; |
| |
| /** |
| * Constructs a {@link Values} from a {@link Tuple} based on indicies. |
| */ |
| public class ValuesMapper implements TupleValueMapper<Values> { |
| private final int[] indices; |
| |
| /** |
| * Constructs a new {@link ValuesMapper} that extracts value from a {@link Tuple} at specified indices. |
| * |
| * @param indices the indices |
| */ |
| public ValuesMapper(int... indices) { |
| this.indices = indices; |
| } |
| |
| @Override |
| public Values apply(Tuple input) { |
| Values values = new Values(); |
| for (int i : indices) { |
| values.add(input.getValue(i)); |
| } |
| return values; |
| } |
| } |