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From "Jesse Sweetland (JIRA)" <j...@apache.org>
Subject [jira] Created: (BETWIXT-55) Suppress Empty Collection Wrapper Elements
Date Wed, 20 Sep 2006 17:00:22 GMT
Suppress Empty Collection Wrapper Elements
------------------------------------------

                 Key: BETWIXT-55
                 URL: http://issues.apache.org/jira/browse/BETWIXT-55
             Project: Commons Betwixt
          Issue Type: Improvement
         Environment: N/A
            Reporter: Jesse Sweetland
            Priority: Trivial


Attached is a patch that modifies the isEmptyElement method of AbstractBeanWriter to consider
collective element descriptors as empty if the collection properties they reference have no
elements.  This suppresses the output of empty wrapper elements.  For example, consider the
following .betwixt file for class Foo:

<info> 
  <element name="foo"> 
    <element name="bars"> 
      <element name="bar" property="bars"/> 
    </element> 
    <addDefaults/> 
  </element> 
</info> 

Under Betwixt 0.7, an empty <bars/> element is written even if Foo.getBars() returns
a null or empty collection.  This patch determines that the collection descriptor for the
<bar> element is empty, so all of the children elements of the <bars> wrapper
element descriptor are empty, so the <bars> element descriptor itself is empty, and
is therefore ignored.

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