Re: [json-lib-user] Problems with .toJava

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

Hi Kiril,

That code would surely work but ties your domain to Json-lib, the docs (http://json-lib.sourceforge.net/usage.html) include an alternative solution to your problem: registering a BeanMorpher.


	1. class MyBean{  
	2.    private List data;  
	3.    // getters & setters  
	4. }  
	5.   
	6. class Person{  
	7.    private String name;  
	8.    // getters & setters  
	9. }  
	10.   
	11. ...  
	12.   
	13. String json = "{'data':[{'name':'Wallace'},{'name':'Grommit'}]}";  
	14. Map classMap = new HashMap();  
	15. classMap.put( "data", Person.class );  
	16. MyBean bean = JSONObject.toBean( JSONObject.fromObject(json), MyBean.class, classMap );  

	1. Morpher dynaMorpher = new BeanMorpher( Person.class, JSONUtils.getMorpherRegistry() );  
	2. morpherRegistry.registerMorpher( dynaMorpher );  
	3. List output = new ArrayList();  
	4. for( Iterator i = bean.getData().iterator(); i.hasNext(); ){  
	5.    output.add( morpherRegistry.morph( Person.class, i.next() ) );  
	6. }  
	7. bean.setData( output );  
Cheers,
Andres

 -------------------------------------------
http://jroller.com/aalmiray
http://www.linkedin.com/in/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.



----- Original Message ----
From: Kiril <kir...@gm...>
To: jso...@li...
Sent: Saturday, May 10, 2008 12:54:57 AM
Subject: Re: [json-lib-user] Problems with .toJava

Ok,

I'm not a newbie anymore :)

Here is the solution, if anyone is interested. I modified the setter in the root class for the list of children (Group classes):

public void setGroups(List<Group> groups) {
        for(int i=0; i < groups.size(); i++) {
            Group grp = null;
            BeanMorpher mrph = new BeanMorpher(Group.class, JSONUtils.getMorpherRegistry());
            grp = (Group)mrph.morph(groups.get(i));            
            this.groups.add(grp);
        }
    }

Yahoo!!!... Works!



On Sat, May 10, 2008 at 2:55 AM, Kiril <kir...@gm...> wrote:

May be attaching the json string will help:

{"groups":[{"comparison":"And","fields":[{"comparison":"Near","field":"subject","values":["Daily","Report"]},{"comparison":"Equals","field":"message","values":["November"]}],"nextGroupComparison":"Or"},{"comparison":"Null","fields":[{"comparison":"Equals","field":"message","values":["October"]}],"nextGroupComparison":"Null"}],"revision":0,"version":1}



On Sat, May 10, 2008 at 2:54 AM, Kiril <kir...@gm...> wrote:

Hi all,

I'm newbie to json-lib.
I want to use it to serialize a class with a List<Class>, containing number of subclasses.

While toJSON works fine, passing back the same string to toJava works only partially - the root class is generated Ok, but the children, in the List are MorphDynaBean's.

Here is the code:

JSONUtils.getMorpherRegistry().registerMorpher(new EnumMorpher(GroupComparison.class));
            JSONUtils.getMorpherRegistry().registerMorpher(new EnumMorpher(NextGroupComparison.class));
            JSONUtils.getMorpherRegistry().registerMorpher(new EnumMorpher(FieldComparison.class));            
            JSONObject jsonObject = new JSONObject();            
            JsonConfig jsonConfig = new JsonConfig();  
            jsonConfig.setRootClass( Filter.class );
            jsonConfig.setEnclosedType(List.class);            
            jsonObject = (JSONObject)JSONSerializer.toJSON(jsonString);
            Filter filter = (Filter)JSONSerializer.toJava(jsonObject, jsonConfig);

The Filter class contains List of Group classes, but these are generated as a MorphDynaBean... 

Thanks in advance for any help!

Kiril.


      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ