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1   /*
2    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
3    * The software in this package is published under the terms of the CPAL v1.0
4    * license, a copy of which has been included with this distribution in the
5    * LICENSE.txt file.
6    */
7   package org.mule.example.loanbroker.routers;
8   
9   import org.mule.DefaultMuleEvent;
10  import org.mule.DefaultMuleMessage;
11  import org.mule.api.MuleEvent;
12  import org.mule.example.loanbroker.LocaleMessage;
13  import org.mule.example.loanbroker.messages.LoanQuote;
14  import org.mule.routing.EventGroup;
15  
16  import java.util.Iterator;
17  
18  import org.apache.commons.logging.Log;
19  import org.apache.commons.logging.LogFactory;
20  
21  public class BankQuotesAggregationLogic
22  {
23      /**
24       * logger used by this class
25       */
26      protected static final Log logger = LogFactory.getLog(BankQuotesAggregationLogic.class);
27      
28      public static MuleEvent aggregateEvents(EventGroup events) throws Exception
29      {
30          LoanQuote lowestQuote = null;
31          LoanQuote quote = null;
32          MuleEvent event = null;
33  
34          for (Iterator iterator = events.iterator(); iterator.hasNext();)
35          {
36              event = (MuleEvent)iterator.next();
37              Object o = event.getMessage().getPayload();
38              if(o instanceof LoanQuote)
39              {
40                  quote = (LoanQuote)o;
41              }
42              else
43              {
44                  throw new IllegalArgumentException("Object received by Aggregator is not of expected type. Wanted: "
45                          + LoanQuote.class.getName() + " Got: " + o);
46              }
47              logger.info(LocaleMessage.processingQuote(quote));
48  
49              if (lowestQuote == null)
50              {
51                  lowestQuote = quote;
52              }
53              else
54              {
55                  if (quote.getInterestRate() < lowestQuote.getInterestRate())
56                  {
57                      lowestQuote = quote;
58                  }
59              }
60          }
61  
62          logger.info(LocaleMessage.lowestQuote(lowestQuote));
63          return new DefaultMuleEvent(new DefaultMuleMessage(lowestQuote, event.getMessage(),
64              event.getMuleContext()), event);
65      }
66  }