Hi,
I have a simple (or so it seems) problem.
There is a piece of XML that represents a list of items.
I need to convert this XML to the List of beans.
I must be doing something very wrong but for couple days now I am not able
to come up with combination of code and configuration that would work. I can
see beans being created but assignment into List never happens. At the same
time running single beans does work.
Obviously I'm missing something big time here;
Any help will be greatly appreciated.
Relevant code pieces and configuration is below.
Thanks,
Igor
**** SETUP ( done once in translator life cycle )
// insert my bean factory, verified - works, beans created ok.
beanCreationChain = BeanCreationList.createStandardChain();
beanCreationChain.insertBeanCreator(1, new BeanCreator() );
// load betwixt-config, save XMLIntrospector for future use
BeanWriter writer = new BeanWriter();
introspector = writer.getXMLIntrospector();
InputSource is = new
InputSource(TranslatorImpl.class.getResourceAsStream(translatorConfig));
introspector.register(is);
introspector.getConfiguration().setWrapCollectionsInElement(true);
writer.getBindingConfiguration().setMapIDs(false);
// save Configuration for future use
configuration = writer.getBindingConfiguration();
**** BETWIXT CONFIG ( loaded by above code )
<?xml version="1.0" encoding="UTF-8"?>
<betwixt-config>
<class name='com.my.CollectionWrapper' >
<element name='elements'>
<element property='element' />
</element>
</class>
<class name='com.my.Application'>
<element name='application'>
<attribute name='id' property='id'/>
<attribute name='name' property='name' />
<element name='description' property='description' />
<addDefaults add-properties='false'/>
</element>
</class>
</betwixt-config>
**** XML IN ( to be loaded into collection )
<?xml version='1.0' ?>
<elements>
<application id="2" name="bean2">
<description>Application Bean 2</description>
</application>
<application id="3" name="bean3">
<description>Application Bean 3</description>
</application>
<application id="1" name="bean1">
<description> Application Bean 1</description>
</application>
</elements>
**** READING ( actual translation step )
Object result = null;
StringReader xmlReader = new StringReader(buffer); // XML IN
BeanReader reader = new BeanReader();
// using configuration saved earlier
reader.setXMLIntrospector(introspector);
reader.setBindingConfiguration(configuration);
reader.getReadConfiguration().setBeanCreationChain(beanCreationChain);
reader.registerBeanClass("elements",
Class.forName("com.my.CollectionWrapper"));
reader.registerBeanClass("application",
Class.forName("com.my.Application"));
result = reader.parse(xmlReader);
// RESULT Contains empty collection.
// Adding to collection in CollectionWrapper never happens
**** COLLECTION WRAPPER
public class CollectionWrapper
{
private static Logger log = Logger.getLogger(CollectionWrapper.class);
private Collection elements = null;
public CollectionWrapper()
{
log.debug("********* CONSTRUCTOR ******************");
elements = new java.util.ArrayList();
}
public void addElement(Object element)
{
log.debug("********** ADD *************** " + element.toString());
elements.add(element);
}
public Collection getElementCollection() { return elements; }
public Iterator getElements() { return elements.iterator(); }
public void setElements(Collection elements) { this.elements = elements; }
// this did not work either
// public Collection getApplications(Application element) {
addElement(element); }
// public void addApplication(Application element) { addElement(element); }
// public void setApplication(Application element) { addElement(element); }
}
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