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From "Julian Cable (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CAMEL-4350) Camel-csv with List<Map> has arbitrary column order
Date Thu, 18 Aug 2011 19:11:27 GMT

    [ https://issues.apache.org/jira/browse/CAMEL-4350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13087203#comment-13087203
] 

Julian Cable commented on CAMEL-4350:
-------------------------------------

I don't have time to try it, but it looks like changing HashMap to LinkedHashMap on lines
25 and 197 of 

/camel/trunk/components/camel-jdbc/src/main/java/org/apache/camel/component/jdbc/JdbcProducer.java

would do the trick.

Julian

> Camel-csv with List<Map> has arbitrary column order
> ---------------------------------------------------
>
>                 Key: CAMEL-4350
>                 URL: https://issues.apache.org/jira/browse/CAMEL-4350
>             Project: Camel
>          Issue Type: Improvement
>    Affects Versions: 2.7.1
>         Environment: java 1.6
>            Reporter: Julian Cable
>            Priority: Minor
>             Fix For: 2.9.0
>
>
> The following route works but the order of the columns is dependent on the natural ordering
of the hashmap. Target systems will have an expectation of the order of the data. 
> <route>
>   <from uri="jetty:http://0.0.0.0:16081/css/mes"/>
>   <setBody>
>     <constant>SELECT id, value1, value2 FROM mytable</constant> 
>   </setBody>
>   <to uri="jdbc:mydb"/>
>   <marshal>
>     <csv/>
>   </marshal>
>  </route>
> Either there needs to be a property for csv that allows hash key ordering to be specified,
or an option to sort the keys, e.g.
> <route>
>   <from uri="jetty:http://0.0.0.0:16081/css/mes"/>
>   <setBody>
>     <constant>SELECT id as col1, value1 as col2, value2 as col3 FROM mytable</constant>

>   </setBody>
>   <to uri="jdbc:mydb"/>
>   <marshal>
>     <csv sortFields="true" />
>   </marshal>
>  </route>

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