Howto: Flex + Java

[shawntng]

Understand that with RemoteObject + BlazeDS, we could access Java objects on the server.

I am able to return Java collections and native objects, but if i wish to return an ArrayList of customized Java Bean Object to Flex, how can i do it?

I read that we need FDS, but dont BlazeDS provides the funcationality?

I need a 100% free setup , so i'm not into buying the Lifecycle stuff.

Anyone can advise?

[kennethteo]

Understand that with RemoteObject + BlazeDS, we could access Java objects on the server.

I am able to return Java collections and native objects, but if i wish to return an ArrayList of customized Java Bean Object to Flex, how can i do it?

I read that we need FDS, but dont BlazeDS provides the funcationality?

I need a 100% free setup , so i'm not into buying the Lifecycle stuff.

Anyone can advise?

Hi shawntng,

You can return return ArrayList of customised JavaBeans to Flex...

Here's how i do it with BlazeDS..

1) Specify this on a AS3 ValueObject [RemoteClass(alias="some.package.inyourjava.app.UserVO")]

2) Create custom get and set functions. Here's a quick example. Pardon me if it is not a really good one. Let's say we have a friendList ArrayCollection variable for each UserVO. The custom get set functions will automatically type cast your custom object from your BlazeDS result.

Code: Select all

package package.vo
{
   import com.adobe.cairngorm.vo.IValueObject; //Cairngorm
   
   import mx.collections.ArrayCollection;
   
   [Bindable]
   [RemoteClass(alias="some.package.inyourjava.app.UserVO")]
   public class UserVO implements IValueObject
   {
      public var userId:Number=0;
      public var name:String;
      public var _friendsList:ArrayCollection = new ArrayCollection();
   }
      public function set friendList(array:ArrayCollection):void{
         
         var tempFriendList:ArrayCollection = new ArrayCollection();
           
            for (var i:int = 0; i < array.length; i++) {
                tempFriendList.addItem(UserVO(array.getItemAt(i)));
            }
            _userProfile = tempFriendList;
      }
      
   public function get friendList():ArrayCollection{
         var tempFriendList:ArrayCollection = new ArrayCollection();
           
            for (var i:int = 0; i < _friendsList.length; i++) {
                tempFriendList.addItem(UserVO(_friendsList.getItemAt(i)));
            }
            _friendsList = tempUserProfileList;
            return _friendsList;
      }

}


3) You can use your friendList var with something like this
var user:UserVO = new UserVO();
user = event.result //assuming you get the result from BlazeDS
trace("FriendList: " + user.friendList);






Do note that BlazeDS security model is not really that secured.