| /** |
| * 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.camel.example.tracer; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.processor.aggregate.AggregationStrategy; |
| |
| /** |
| * Our aggregator where we aggregate all the quotes and find the |
| * the best quotes based on the one that has the most cool words |
| * from our cools words list |
| */ |
| public class QuoteAggregator implements AggregationStrategy { |
| |
| private List<String> coolWords = new ArrayList<String>(); |
| |
| public void setCoolWords(List<String> coolWords) { |
| for (String s : coolWords) { |
| // use lower case to be case insensitive |
| this.coolWords.add(s.toLowerCase()); |
| } |
| // reverse order so indexOf returning -1 will be the last instead |
| Collections.reverse(this.coolWords); |
| } |
| |
| public Exchange aggregate(Exchange oldExchange, Exchange newExchange) { |
| if (oldExchange == null) { |
| // the first time then just return the new exchange |
| return newExchange; |
| } |
| |
| // here we aggregate |
| // oldExchange is the current "winner" |
| // newExchange is the new candidate |
| |
| // we get the quotes of the two exchanges |
| String oldQuote = oldExchange.getIn().getBody(String.class); |
| String newQuote = newExchange.getIn().getBody(String.class); |
| |
| // now we compare the two and get a result indicate the best one |
| int result = new QuoteComparator().compare(oldQuote, newQuote); |
| |
| // we return the winner |
| return result > 0 ? newExchange : oldExchange; |
| } |
| |
| private class QuoteComparator implements Comparator<String> { |
| |
| public int compare(java.lang.String o1, java.lang.String o2) { |
| // here we compare the two quotes and picks the one that |
| // is in the top of the cool words list |
| int index1 = coolWords.indexOf(o1.toLowerCase()); |
| int index2 = coolWords.indexOf(o2.toLowerCase()); |
| |
| return index1 - index2; |
| } |
| } |
| |
| } |