Re: Reading XML as bean collection using Betwixt

Tue, 16 Oct 2007 10:21:51 -0700

Hi Chris,

Thanks for the info. However, I think my case is slightly different. What I'm trying to do is not have to write the Configuration class that has the addEntry() and getEntry() methods and instead use an ArrayList directly. ie I'd like Betwixt to create an ArrayList and populate it with my POJOs using the add() method of the list.

-- Ravi

Christian Grobmeier wrote: 
Sorry if you get this twice, my email seems not  to get through to the list,
so i sent it again.



Hi Ravi,
i had the same problems and figured out that i need those .betwixt files.
Imagine a configuration having different entrys.

<?xml version="1.0" encoding="UTF-8"?>
<info primitiveTypes="attribute">
       <element name="configuration" class=''de.grobmeier.Configuration'>
               <element name="entry"
                                property="entry"
                                class='de.grobmeier.Entry'>
                       <addDefaults/>
               </element>
               <addDefaults/>
       </element>
</info>

Here is my Configuration class:

public class Configuration {
   private List<Entry> entries= new ArrayList<Entry>();
public List<Entry> getEntry() {
       return entries;
   }

   public void addEntry(_entry) {
       entries.add(_entry);
   }
}

Mind that addEntry Method please.
My Entry-Class is a simple POJO. I figured out i need a betwixt file
here to, altough i thought this was mapped "by default", however, its
similar to this:

<info primitiveTypes="attribute">
       <element
               name="entry"
               property="entry"
               class='de.grobmeier.Entry'>
               <attribute name='key' property='key'/>
               <attribute name='value' property='value'/>

      </element>
</info>

I had to register only the configuration class:
beanReader.registerBeanClass("configuration", Configuration.class);
           configuration = (Configuration)beanReader.parse(reader);

Hope this helps,
Best,
Chris

On 10/16/07, Ravindra Wankar <[EMAIL PROTECTED]> wrote:
  
 No. I'm trying to get all the person objects into an ArrayList.

 Thanks
 Ravi.


 Eckenfellner Klaus wrote:
 Does your collection-bean have adder-functions for the person-beans?

please see example at
http://commons.apache.org/betwixt/guide/examples.html
(bottom of page).

Ravindra Wankar wrote:


 How do I convert an XML to bean collection?

XML:
<persons>
 <person>
 <name>A</name>
 <age>21</age>
 </person>
 <person>
 <name>B</name>
 <age>25</age>
 </person>
 <person>
 <name>C</name>
 <age>32</age>
 </person>
</persons>

Java code:

beanReader.registerBeanClass("persons", ArrayList.class);
beanReader.registerBeanClass("persons/person", Person.class);
ArrayList persons = (ArrayList)beanReader.parse(xmlReader);

I get an empty list. I'm using Betwixt 0.8, Digester 1.8, BeanUtils 1.7

Thanks
- Ravi.

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