| /** |
| * 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.jwplayer.sqe.trident.function; |
| |
| import org.apache.avro.util.Utf8; |
| import org.apache.storm.trident.operation.BaseFunction; |
| import org.apache.storm.trident.operation.TridentCollector; |
| import org.apache.storm.trident.tuple.TridentTuple; |
| import org.apache.storm.tuple.Values; |
| |
| import java.util.Map; |
| import java.util.TreeSet; |
| |
| |
| public class ExpandKeys extends BaseFunction { |
| @Override |
| @SuppressWarnings("unchecked") |
| public void execute(TridentTuple tuple, TridentCollector collector) { |
| Map map = (Map) tuple.get(0); |
| TreeSet set = new TreeSet(map.keySet()); |
| |
| for(Object key: set) { |
| // Avro strings are stored using a special Avro type instead of using Java primitives |
| if(key instanceof Utf8) { |
| collector.emit(new Values(key.toString())); |
| } else { |
| collector.emit(new Values(key)); |
| } |
| } |
| } |
| } |