Re: [betwixt] couple of questions

robert burrell donkin Sun, 23 Jan 2005 14:55:19 -0800

hi jason

i've had a check and i'm pretty sure that the functionality you required was added to betwixt as part of the anonymous collections work. please update to CVS HEAD and take a look at the latest documentation.

- robert

On 19 Jan 2005, at 15:41, Jason Wood wrote:

1) is there a document describing the different attributes each element in a configuration file an contain? 2) has to do with List.

When using a configuration if the <addDefaults/> element is not present then all properties must be explicitly listed. For a List property to show up in the XML output, it as all the rest must be explicitly listed ... <element name="MyAttributes" property="attributes"/>. This is fine, but "MyAttribute" will show up for every entry in the java.util.List...
example ...
public class OutterClass
{
  private Vector attributes = new Vector();
  public OutterClass()
  {
    attributes.add(new DerivedClassA());
    attributes.add(new DerivedClassB());
  }
  public void addAttribute(BaseClass attr)
  {
   attributes.add(attr);
  }
  public Vector  getAttributes()
  {
    return attributes;
  }
}
public class DerivedClassA implements BaseClass
{
}
public class DerivedClassB implements BaseClass
{
}
<?xml version='1.0' encoding='UTF-8' ?>
<info>
<element name='MyOutterClass'>
 <element name="MyAttributes" property="attributes"/>
</element>
</info>
<MyOutterClass>
  <MyAttributes/>
  <MyAttributes/>
</MyOutterClass>
-----------------------------------------------------------------
I tried to remove the name="MyAttribtue" because I want betwixt to use each entries (DerivedClassA and DerivedClassA) .betwixt file. for instance
<info>
 <element name="MyDerivedClassA">
  <addDefaults/>
 </element>
</info>
<info>
 <element name="MyDerivedClassB">
  <addDefaults/>
 </element>
</info>
but the digester states the "name" attribtue is required...
[ERROR] Digester - Begin event threw exception <org.xml.sax.SAXException: Name attribute is required.>org.xml.sax.SAXException: Name attribute is required. at org.apache.commons.betwixt.digester.ElementRule.begin(ElementRule.java: 75) at org.apache.commons.digester.Digester.startElement(Digester.java:1286) at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source) at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknow n Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement( Unkno wn Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDi spatc her.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unkn own Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.commons.digester.Digester.parse(Digester.java:1629) at org.apache.commons.betwixt.XMLIntrospector.findByXMLDescriptor(XMLIntro spect or.java:949) at org.apache.commons.betwixt.XMLIntrospector.introspect(XMLIntrospector.j ava:4 65) at org.apache.commons.betwixt.XMLIntrospector.introspect(XMLIntrospector.j ava:4 12) at org.apache.commons.betwixt.io.AbstractBeanWriter.writeBean(AbstractBean Write r.java:223) at org.apache.commons.betwixt.io.AbstractBeanWriter.write(AbstractBeanWrit er.ja va:155) at org.apache.commons.betwixt.io.BeanWriter.write(BeanWriter.java:190) at com.betwixt.Main.main(Main.java:30) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.ja va:39 ) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccesso rImpl .java:25) at java.lang.reflect.Method.invoke(Method.java:324) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)

I thought I could use the PluralStemmer in this case, but there is not enough information being passed to findPluralDescriptor( String propertyName, Map map ) in order for the code to choose the right ElementDescriptor. Is it possible that if the name attribute is not present to tell betwixt to use the given name in the classes .betwixt file for output? If it is possible and not already in the current CVS src ... can I checkout the source and add it.
Thanks
J
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Re: [betwixt] couple of questions

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