Add an option to keep optional object value at its default instead of null
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Key: JIBX-418
URL: http://jira.codehaus.org/browse/JIBX-418
Project: JiBX
Issue Type: Wish
Components: BindGen, core
Reporter: Markus Sunela
Currently it is possible to specify that an element or an attribute is
optional. If it's optional and no value is specified in XML then for basic
types the value is left as is (unless a default value is given in binding) but
for Object types value is set to null. It would be really useful, if it was
possible to have an setting that enables leave the Object value untouched if
it's optional and no value is given in XML. Classical example would be:
class Foo {
String name = "foo";
List values = new List();
}
<mapping class="Foo">
<value name="name" field="name";
<collection name="values" field="values" usage="optional"/>
</mapping>
Now when XML is read, values field is set to null if no values element was
given in XML. Then user has to handle somehow the situation of list being null
in the code, which clutters the code. This kind of situations can happen
easily, for example when extending already existing schemas and wanting to
preserve compatibility with older versions.
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