Re: [json-lib-user] toBean

[Andres A. <aal...@ya...>]

Hmmm, you are right I should elaborate more on this
feature, the docs will be updated in a couple of days,
but in the meantime here is the scoop:

Supouse you have a bean with a List attribute and a
Person bean like

class MyBean{
  private List data;
  // getters & setters
}

class Person{
  private String name;
  // getters & setters
}

With the following JSON String
"{'data':[{'name':'Wallace'},{'name':'Grommit'}]}" how
do you create populate the 'data' aatribute if you
have no idea which type of object must bea created ?

String json =
"{'data':[{'name':'Wallace'},{'name':'Grommit'}]}";
MyBean bean = JSONObject.toBean( json, MyBean.class );

This yields a MyBean instance that has DynaBeans
inside the 'data' attribute', so now comes the part of
postprocessing, this can be done with an Iterator 

Morpher dynaMorpher = new DynaBeanToBeanMorpher(
Person.class, JSONUtils.getMorpherRegistry() );
morpherRegistry.registerMorpher( dynaMorpher );
List output = new ArrayList();
for( Iterator i = bean.getData().iterator();
i.hasNext(); ){
   output.add( morpherRegistry.morph( Person.class,
i.next() ) );
}
bean.setData( output );

Regards.

 --- Fogas László <las...@in...> escribió:

> Hi,
> 
> In the project webpage there is so few information
> about how to use toBean
> method with lists..
> 
> The second case is similar and it happens when the
> target bean has a
> Collection (List) as a property and it must contain
> other beans. In this
> case there is no way to provide hints for class
> conversion. The only
> possible solution is to postprocess the collection
> transforming each
> DynaBean into an specific bean. 
> 
> To ease the postprocessing scenarios, Json-lib has a
> Morpher capable of
> transforming a DynaBean into an specific bean,
>
<http://json-lib.sourceforge.net/apidocs/net/sf/json/util/DynaBeanToBeanMorp
> her.html> DynaBeanToBeanMorpher 
> 
> Could you give me some samples?
> 
> Regards, Lazlo
> 


-------------------------------------------
Ing. Andres Almiray Jaramillo
http://jroller.com/page/aalmiray
--
What goes up, must come down. Ask any system administrator.
There are 10 types of people in the world: Those who understand binary, and those who don't.
To understand recursion, we must first understand recursion.


	
	
		
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