Mapping Objects in Flex Data Services

Hi My Dear Friends
This is yogans, i am working in flex for the last 15 days
and i learned the basic things like syntax, tags, scripts. and i am
doing
some data services work now. especially with the help of
Java Remote objects. I dont know http services and
webservices(WSDL).
My doubt here is, I created a user defined object in java
and i want to send this object through Remote call from flex. how
can i
type cast the java object to flex. And i want to add these
objects to the dataprovider of a datagrid. Please help me in
acheiving
this. i will be very thank ful to you in my life. I know
that i have to create same kind of object in flex. But i dont have
concrete idea
please explain me with very simple example step by step . I
am awaiting in hope that God will send some one to help me.
Thanks and Regards
Yogans.s

Hi,
If you want to map your actionscript class to your server's
Java class. You can run a util function
registerClassAlias("dev.echoservice.Book",Book);
where "dev.echoservice.Book" is the fully qualify name of
your java class. Book is your actionscript class.
Calling this util before you make your remoteobject call. You
can put this in your actionscript class constructor, it makes this
call whenever you create your class. However, it seems to be better
to call it when the class is loaded. To do so you can declare it as
static
public static var a:* =
registerClassAlias("dev.echoservice.Book",Book);
OR
You can also declare it as metaData in your class as:
[RemoteClass(alias="dev.echoservice.Book")]
However, I found someone saying that it didn't work in sdk
compilation, but webtier compilation. It might be some
configuration issue. I haven't tried it yet.
To display the properties in the dataGrid, you just have to
either use Array or ArrayCollection. If databinding is involved,
the datagrid need to know the Collection.Change event. It is better
to use ArrayCollection, therefore, adding new item to
arrayCollection the datagrid get repopulate.
hope it helps!
William Chan

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Thanks for the reply. Yes, I did compile all the Java and it
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import java.util.List;
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Thanks for the reply. Yes, I did compile all the Java and it
works OK with a simple Java program. It just will not work in a
Flex application.
The java classes are:
RRA:
package blah.myPackage;
import java.util.List;
import java.util.Collection;
import flex.data.DataSyncException;
import flex.data.assemblers.AbstractAssembler;
class RRA extends AbstractAssembler
public Collection fill( List fillParameters )
RRS service = new RRS();
return service.getSome();
RRS:
package blah.myPackage;
import java.util.ArrayList;
import java.util.List;
import java.sql.*;
import flex.EORS.*;
class RRS
public List getSome()
ArrayList list = new ArrayList();
String str = "bob";
RR rr = new RR(str);
list.add(rr);
return list;
RR:
package blah.myPackage;
class RR
private String name;
public RR() { }
public RR(String name)
this.name = name;
public String getName()
return this.name;
public void setName(String name)
this.name = name;
I started with something that retrieved data from a database
but watered it down just to try and get some kind of communication
between Flex and Java.

Mapping Objects in Flex Data Services

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