Generating Header fields in XML file by BeanIO

Question

I'm trying to generate the following xml file which has 2 fields as Header and the Repeating section "rec" node :

<?xml version="1.0" encoding="UTF-8"?>

<transaction>

<createDate>20160708</createDate>
<dlrCode>100<dlrCode/>

<rec>
    <processDate>20190108</processDate>
    <srcID/>10<srcID/>
</rec>
<rec>
    <processDate>20190108</processDate>
    <srcID/>11<srcID/>
</rec>
<rec>
    <processDate>20190108</processDate>
    <srcID/>12<srcID/>
</rec>

</transaction>

This is the mapping file which I created:

<?xml version="1.0" encoding="UTF-8"?>
<beanio xmlns="http://www.beanio.org/2012/03"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.beanio.org/2012/03 http://www.beanio.org/2012/03/mapping.xsd">

 <stream name="dist" format="xml" xmlName="transaction" >
     <record name="HeaderRecord" class="com.myPackage.HeaderRecord" minOccurs="1" maxOccurs="1" order="1" > 
        <field name="createDate" format="yyyyMMdd" />
        <field name="dlrCode" />
    </record>
    <record name="DisRecord" class="com.myPackage.Record" minOccurs="0" maxOccurs="unbounded" xmlName="rec" order="2">
        <field name="processDate" format="yyyyMMdd"/>
        <field name="srcID"/> 
    </record>
 </stream>
</beanio>

But the problem is, it generates the header fields inside the HeaderRecord node like this:

<?xml version="1.0" encoding="UTF-8"?>

<transaction>

<HeaderRecord>
     <createDate>20160708</createDate>
     <dlrCode>100<dlrCode/>
</HeaderRecord>

<rec>
    <processDate>20190108</processDate>
    <srcID/>10<srcID/>
</rec>
<rec>
    <processDate>20190108</processDate>
    <srcID/>11<srcID/>
</rec>
<rec>
    <processDate>20190108</processDate>
    <srcID/>12<srcID/>
</rec>
</transaction>

Is there something misconfigured in the mapping file? How to achieve the desired output?

I think you should show us how you use the `BeanWriter` together with the above mapping file to achieve your first (desired) output. — nicoschl, Jan 10 '19 at 21:18
The xml data is huge, I do multiple calls to BeanWriter.write(..) per each repeating POJO (detail) and one call for header POJOto avoid any out of memory (heap space) issue. — Ben, Jan 11 '19 at 17:56

score 1 · Answer 1 · answered Jan 10 '19 at 21:47

By using the xmlType="none" attribute you can control if an xml element should be produced or not. The xmlName is by default equal to the record name when you don't specify a xmlName attribute, see here. A record will always be mapped to an xml element and with the use of segments, you might be able to get the desired output.

Try this mapping file:

<stream name="dist" format="xml" xmlType="none" >
  <record name="HeaderRecord" class="com.mypackage.HeaderRecord" minOccurs="1" maxOccurs="1" xmlName="transaction">
    <segment name="dummy" xmlType="none">
      <field name="createDate" format="yyyyMMdd" />
      <field name="dlrCode" />
    </segment>
  </record>

I don't think it is 100% what you are looking for though.

It doesn't generate the layout that I'm looking for ,The must be end of the file, but by applying this config it creates the header fields inside the , and multiple outside the — Ben, Jan 11 '19 at 18:27
I don't see any way of achieving wat you ask for only with `BeanIO`, without changing your data structure. I get your concern with the heap space etc. Does it have to be `BeanIO`? — nicoschl, Jan 11 '19 at 22:51

Generating Header fields in XML file by BeanIO

1 Answers1