[flexcoders] Re: Java POJO/Action Script question
Thanks Doug, I was able to print the child object properties using the labelFunction, but the problem is the column is editable, so when ever i click that filed it's changing back to [object.object]. Do you have any samples using as script printing child object properties in datagrid? BTW i changed logger level=Debug in gateway-config file and it's was printing all the parent child values from Java. i appreciate your help. --- In flexcoders@yahoogroups.com, douglowder [EMAIL PROTECTED] wrote: I think that design is fine. I use a similar approach, except that my POJOs are a combination of entity objects + dataaccess method, i.e. each class has a getList() method that returns a list of all known instances of that type. I chose that approach because these were POJOs written explicitly with Flex in mind, since this was a new project with no existing codebase to work from. It's entirely up to you how much separation you want between data access and the objects themselves. A case where you might be forced to use a facade class is when you have a private member that is determined dynamically in code and accessed only through a getter. In this instance, you could write another class that calls the first class's getter and sets a public member variable to the results. This new class would be what your RemoteObject calls from Flex. Doug --- In flexcoders@yahoogroups.com, sshriyan27 sshriyan27@ wrote: Thanks Doug, Now i understand. Let me ask you a question then, my design consists of 2 parts, i have entity objects and dataaccess objects, each time i do a method call in dataaccess obj and it returns either a collection of entity objects or single entity objects to client. Is this a right way to do or should i use some facade patterns, what do you think, since i'm coming struts background it's kind of learning curve for me using flex. I'm not using any EJB's for our application. It's a simple 3 tier arch. thanks --- In flexcoders@yahoogroups.com, douglowder douglowder@ wrote: It isn't a case of need. One reason you might *want* to have public members in your POJO is for convenience. Flex will automatically handle conversion of Java strings (as well as several other types; check the documentation) to actionscript, so if your RemoteObject returns a collection of POJOs with public String members you can plug that list directly into a grid's dataprovider without any extra actionscript code. This would correspond to collections of ClassA and ClassB objects, which map nicely to what dataProviders expect. You cannot, however, pass a list of Class1 POJOs and expect the datagrid to display Class1.ClassA.A1, Class1.ClassB.B1, etc., without doing some extra work on the actionscript side. See the difference? Now, this doesn't mean you *have* to do things either one way or another. I'm just trying to explain what I personally think is the easiest way to get POJO data into a dataGrid in Flex. If this still isn't clear, let me know and I'll try to provide some working code. Hope that helps! Doug --- In flexcoders@yahoogroups.com, sshriyan27 sshriyan27@ wrote: Thanks guys for helping me out here, but still i don't understand why should i need to have public members firstname,lastname etc in the CloserResultsForm form, isn't it involves redundancy and hard to maintain lots of member variables. all i want is this, Class1 instanciate class A, class B, Class A has member variables A1,A2 and Class B has B1,B2 etc, if i want to display A1, B1 values using Class1, i should be saying classA.A1,classA.A2, ClassB.B1, ClassB.B2 etc, i don't want to declare A1,A2 in Class1 again in 2 palces. Am i missing something here about my design pattern? May be i'm confused. Pls help me soon. --- In flexcoders@yahoogroups.com, douglowder douglowder@ wrote: You're almost there! What you want is for CloserDataAccess to return a list of objects that contain firstname and lastname properties. What you have now is a list of objects that contain other objects (the UserProfileForms), which then contain firstname and lastname. If your CloserResultsForm java class had public members firstname and lastname, initialized by calling the proper getters from UserProfileForm, your datagrid should work. This wouldn't even require the separate ActionScript classes for CloserResultsForm and UserProfileForm. Doug --- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED] wrote: Thanks but still not working i made them private now. I'm totally lost with action script and object mapping. Do i need to use action script
[flexcoders] Re: Java POJO/Action Script question
Sounds like you want a cell renderer for your columns. For each
DataGridColumn in your grid, you can add cellRenderer=MyRenderer
to tell the grid how to determine what should be displayed. The
renderer will be passed the object in the dataprovider for each
particular row, which you can use to determine what to display for
the specific row and column.
Here's a nice link to info on cell renderers:
http://www.communitymx.com/content/article.cfm?cid=B4AED
You can write cell renderers in either .as or .mxml; search the
archives and you'll find plenty of examples. Here's one I use to
display formatted sizes of file objects.
import mx.controls.Label;
/*
* FileSizeCellRenderer is a simple Label-based cell renderer that
displays
* its item content as a formatted file size string.
*/
class FileSizeCellRenderer extends Label {
var listOwner: MovieClip; // The reference we receive to the
list.
var getCellIndex: Function; // The function we receive from the
list.
var getDataLabel: Function; // The function we receive from the
list.
function setValue(str:String, obj:Object, state:String) : Void {
if (obj != undefined) {
// format the file size value in the cell
this.text = obj.file.getSizeString();
}
else {
this.text = ;
}
}
}
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED]
wrote:
Thanks Doug,
I was able to print the child object properties using the
labelFunction, but the problem is the column is editable, so when
ever i click that filed it's changing back to [object.object].
Do you have any samples using as script printing child object
properties in datagrid?
BTW i changed logger level=Debug in gateway-config file and it's
was printing all the parent child values from Java.
i appreciate your help.
--- In flexcoders@yahoogroups.com, douglowder douglowder@
wrote:
I think that design is fine. I use a similar approach, except
that my
POJOs are a combination of entity objects + dataaccess method,
i.e.
each class has a getList() method that returns a list of all
known
instances of that type. I chose that approach because these were
POJOs written explicitly with Flex in mind, since this was a new
project with no existing codebase to work from. It's entirely
up
to
you how much separation you want between data access and the
objects
themselves.
A case where you might be forced to use a facade class is when
you
have a private member that is determined dynamically in code and
accessed only through a getter. In this instance, you could
write
another class that calls the first class's getter and sets a
public
member variable to the results. This new class would be what
your
RemoteObject calls from Flex.
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 sshriyan27@
wrote:
Thanks Doug,
Now i understand. Let me ask you a question then, my design
consists
of 2 parts, i have entity objects and dataaccess objects, each
time
i do a method call in dataaccess obj and it returns either a
collection of entity objects or single entity objects to
client.
Is this a right way to do or should i use some facade
patterns,
what
do you think, since i'm coming struts background it's kind of
learning curve for me using flex. I'm not using any EJB's for
our
application. It's a simple 3 tier arch.
thanks
--- In flexcoders@yahoogroups.com, douglowder douglowder@
wrote:
It isn't a case of need. One reason you might *want* to
have
public
members in your POJO is for convenience. Flex will
automatically
handle conversion of Java strings (as well as several other
types;
check the documentation) to actionscript, so if your
RemoteObject
returns a collection of POJOs with public String members you
can
plug
that list directly into a grid's dataprovider without any
extra
actionscript code. This would correspond to collections of
ClassA
and
ClassB objects, which map nicely to what dataProviders
expect. You
cannot, however, pass a list of Class1 POJOs and expect the
datagrid
to display Class1.ClassA.A1, Class1.ClassB.B1, etc., without
doing
some extra work on the actionscript side. See the
difference?
Now, this doesn't mean you *have* to do things either one
way
or
another. I'm just trying to explain what I personally think
is the
easiest way to get POJO data into a dataGrid in Flex. If
this
still
isn't clear, let me know and I'll try to provide some
working
code.
Hope that helps!
Doug
--- In flexcoders@yahoogroups.com, sshriyan27
sshriyan27@
wrote:
Thanks guys for helping me out here, but still i don't
understand
why should i need to have public members
firstname,lastname
etc
in
[flexcoders] Re: Java POJO/Action Script question
Thanks guys for helping me out here, but still i don't understand
why should i need to have public members firstname,lastname etc in
the CloserResultsForm form, isn't it involves redundancy and hard to
maintain lots of member variables.
all i want is this,
Class1 instanciate class A, class B, Class A has member variables
A1,A2 and Class B has B1,B2 etc,
if i want to display A1, B1 values using Class1,
i should be saying classA.A1,classA.A2, ClassB.B1, ClassB.B2 etc,
i don't want to declare A1,A2 in Class1 again in 2 palces.
Am i missing something here about my design pattern? May be i'm
confused.
Pls help me soon.
--- In flexcoders@yahoogroups.com, douglowder [EMAIL PROTECTED]
wrote:
You're almost there! What you want is for CloserDataAccess to
return
a list of objects that contain firstname and lastname properties.
What you have now is a list of objects that contain other objects
(the
UserProfileForms), which then contain firstname and lastname.
If your CloserResultsForm java class had public members firstname
and
lastname, initialized by calling the proper getters from
UserProfileForm, your datagrid should work. This wouldn't even
require the separate ActionScript classes for CloserResultsForm and
UserProfileForm.
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED]
wrote:
Thanks but still not working i made them private now.
I'm totally lost with action script and object mapping.
Do i need to use action script for the value objects i have, if
that
so is there any easy way to write action scripts same as the
java
objects.
mx:Application xmlns:mx=http://www.macromedia.com/2003/mxml;
initialize=initApp() xmlns:i2view=view pageTitle=Test
Application
mx:Script
import src.com.flex.form.*;
var users: Array;
var upForm: UserProfileForm;
var closerResultsForm: CloserResultsForm;
var userList: Array;
var resultList: Array;
function initApp() {
ro.getResults(); // returns CloserResultsForm as a
collection
}
function getUserList_result(event) {
userList=event.result;
}
function getResultList_result(event) {
resultList=event.result;
}
/mx:Script
mx:RemoteObject id=ro
source=com.chl.dataaccess.CloserDataAccess
mx:method name=getResults result=getResultList_result
(event)/
/mx:RemoteObject
mx:DataGrid id=dg dataProvider={resultList} width=838
editable=true showHeaders=true
mx:columns
mx:Array
mx:DataGridColumn columnName=firstname
headerText=Firstname/
mx:DataGridColumn columnName=lastname
headerText=Lastname/
/mx:Array
/mx:columns
/mx:DataGrid
** This is the situation i'm in now, we're going to develop new
apps
using RIA technology, we don't have time to learn action scripts
or
any other vedor specific scripts. so i'm trying to convince that
flex is the best solution, but it looks like flex dev is not
rapid
as what i saw from demo, still lots of manual coding has to be
done.
May be i'm not understanding fully about flex.
So can you guys tell me whether i should use flex or coldfushion
or
ajax with struts as i did before.
Thanks
--- In flexcoders@yahoogroups.com, douglowder
[EMAIL PROTECTED]
wrote:
Ah, it looks like you have taken both my *and* Dave's advice,
when
you
really only needed to do one or the other. So, if you don't
have a
problem with making your firstname and lastname variables
public in
your UserProfileForm POJO (which you might, since it kind of
defeats
the purpose of getters and setters), then just pass your
datagrid a
collection of UserProfileForms:
mx:DataGrid dataProvider={myUserProfileFormCollection} /
This will display the entire object in the datagrid. If you
only
want
to see certain fields, or want to specify a specific order,
define
columns for the datagrid like so:
mx:DataGrid dataProvider={myUserProfileFormCollection}
mx:columns
mx:Array
mx:DataGridColumn columnName=firstname
headerText=First Name/
mx:DataGridColumn columnName=lastname
headerText=Last Name/
/mx:Array
/mx:columns
/mx:DataGrid
If, however, you want to keep the members variables of your
objects
hidden and provide access only through getters and setters,
then
change the declarations back to private and follow Dave's
advice.
I hope that helps!
Doug
--- In flexcoders@yahoogroups.com, sshriyan27
[EMAIL PROTECTED]
wrote:
Let me send you all my classes, i don't still understand!
Thanks
for
your help anyway.
public class
[flexcoders] Re: Java POJO/Action Script question
It isn't a case of need. One reason you might *want* to have public
members in your POJO is for convenience. Flex will automatically
handle conversion of Java strings (as well as several other types;
check the documentation) to actionscript, so if your RemoteObject
returns a collection of POJOs with public String members you can plug
that list directly into a grid's dataprovider without any extra
actionscript code. This would correspond to collections of ClassA and
ClassB objects, which map nicely to what dataProviders expect. You
cannot, however, pass a list of Class1 POJOs and expect the datagrid
to display Class1.ClassA.A1, Class1.ClassB.B1, etc., without doing
some extra work on the actionscript side. See the difference?
Now, this doesn't mean you *have* to do things either one way or
another. I'm just trying to explain what I personally think is the
easiest way to get POJO data into a dataGrid in Flex. If this still
isn't clear, let me know and I'll try to provide some working code.
Hope that helps!
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED] wrote:
Thanks guys for helping me out here, but still i don't understand
why should i need to have public members firstname,lastname etc in
the CloserResultsForm form, isn't it involves redundancy and hard to
maintain lots of member variables.
all i want is this,
Class1 instanciate class A, class B, Class A has member variables
A1,A2 and Class B has B1,B2 etc,
if i want to display A1, B1 values using Class1,
i should be saying classA.A1,classA.A2, ClassB.B1, ClassB.B2 etc,
i don't want to declare A1,A2 in Class1 again in 2 palces.
Am i missing something here about my design pattern? May be i'm
confused.
Pls help me soon.
--- In flexcoders@yahoogroups.com, douglowder douglowder@
wrote:
You're almost there! What you want is for CloserDataAccess to
return
a list of objects that contain firstname and lastname properties.
What you have now is a list of objects that contain other objects
(the
UserProfileForms), which then contain firstname and lastname.
If your CloserResultsForm java class had public members firstname
and
lastname, initialized by calling the proper getters from
UserProfileForm, your datagrid should work. This wouldn't even
require the separate ActionScript classes for CloserResultsForm and
UserProfileForm.
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED]
wrote:
Thanks but still not working i made them private now.
I'm totally lost with action script and object mapping.
Do i need to use action script for the value objects i have, if
that
so is there any easy way to write action scripts same as the
java
objects.
mx:Application xmlns:mx=http://www.macromedia.com/2003/mxml;
initialize=initApp() xmlns:i2view=view pageTitle=Test
Application
mx:Script
import src.com.flex.form.*;
var users: Array;
var upForm: UserProfileForm;
var closerResultsForm: CloserResultsForm;
var userList: Array;
var resultList: Array;
function initApp() {
ro.getResults(); // returns CloserResultsForm as a
collection
}
function getUserList_result(event) {
userList=event.result;
}
function getResultList_result(event) {
resultList=event.result;
}
/mx:Script
mx:RemoteObject id=ro
source=com.chl.dataaccess.CloserDataAccess
mx:method name=getResults result=getResultList_result
(event)/
/mx:RemoteObject
mx:DataGrid id=dg dataProvider={resultList} width=838
editable=true showHeaders=true
mx:columns
mx:Array
mx:DataGridColumn columnName=firstname
headerText=Firstname/
mx:DataGridColumn columnName=lastname
headerText=Lastname/
/mx:Array
/mx:columns
/mx:DataGrid
** This is the situation i'm in now, we're going to develop new
apps
using RIA technology, we don't have time to learn action scripts
or
any other vedor specific scripts. so i'm trying to convince that
flex is the best solution, but it looks like flex dev is not
rapid
as what i saw from demo, still lots of manual coding has to be
done.
May be i'm not understanding fully about flex.
So can you guys tell me whether i should use flex or coldfushion
or
ajax with struts as i did before.
Thanks
--- In flexcoders@yahoogroups.com, douglowder
[EMAIL PROTECTED]
wrote:
Ah, it looks like you have taken both my *and* Dave's advice,
when
you
really only needed to do one or the other. So, if you don't
have a
problem with making your firstname and lastname variables
public in
your UserProfileForm
[flexcoders] Re: Java POJO/Action Script question
Thanks Doug,
Now i understand. Let me ask you a question then, my design consists
of 2 parts, i have entity objects and dataaccess objects, each time
i do a method call in dataaccess obj and it returns either a
collection of entity objects or single entity objects to client.
Is this a right way to do or should i use some facade patterns, what
do you think, since i'm coming struts background it's kind of
learning curve for me using flex. I'm not using any EJB's for our
application. It's a simple 3 tier arch.
thanks
--- In flexcoders@yahoogroups.com, douglowder [EMAIL PROTECTED]
wrote:
It isn't a case of need. One reason you might *want* to have
public
members in your POJO is for convenience. Flex will automatically
handle conversion of Java strings (as well as several other types;
check the documentation) to actionscript, so if your RemoteObject
returns a collection of POJOs with public String members you can
plug
that list directly into a grid's dataprovider without any extra
actionscript code. This would correspond to collections of ClassA
and
ClassB objects, which map nicely to what dataProviders expect. You
cannot, however, pass a list of Class1 POJOs and expect the
datagrid
to display Class1.ClassA.A1, Class1.ClassB.B1, etc., without doing
some extra work on the actionscript side. See the difference?
Now, this doesn't mean you *have* to do things either one way or
another. I'm just trying to explain what I personally think is the
easiest way to get POJO data into a dataGrid in Flex. If this
still
isn't clear, let me know and I'll try to provide some working code.
Hope that helps!
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 sshriyan27@
wrote:
Thanks guys for helping me out here, but still i don't
understand
why should i need to have public members firstname,lastname etc
in
the CloserResultsForm form, isn't it involves redundancy and
hard to
maintain lots of member variables.
all i want is this,
Class1 instanciate class A, class B, Class A has member
variables
A1,A2 and Class B has B1,B2 etc,
if i want to display A1, B1 values using Class1,
i should be saying classA.A1,classA.A2, ClassB.B1, ClassB.B2 etc,
i don't want to declare A1,A2 in Class1 again in 2 palces.
Am i missing something here about my design pattern? May be i'm
confused.
Pls help me soon.
--- In flexcoders@yahoogroups.com, douglowder douglowder@
wrote:
You're almost there! What you want is for CloserDataAccess to
return
a list of objects that contain firstname and lastname
properties.
What you have now is a list of objects that contain other
objects
(the
UserProfileForms), which then contain firstname and lastname.
If your CloserResultsForm java class had public members
firstname
and
lastname, initialized by calling the proper getters from
UserProfileForm, your datagrid should work. This wouldn't even
require the separate ActionScript classes for
CloserResultsForm and
UserProfileForm.
Doug
--- In flexcoders@yahoogroups.com, sshriyan27
[EMAIL PROTECTED]
wrote:
Thanks but still not working i made them private now.
I'm totally lost with action script and object mapping.
Do i need to use action script for the value objects i have,
if
that
so is there any easy way to write action scripts same as the
java
objects.
mx:Application
xmlns:mx=http://www.macromedia.com/2003/mxml;
initialize=initApp() xmlns:i2view=view pageTitle=Test
Application
mx:Script
import src.com.flex.form.*;
var users: Array;
var upForm: UserProfileForm;
var closerResultsForm: CloserResultsForm;
var userList: Array;
var resultList: Array;
function initApp() {
ro.getResults(); // returns
CloserResultsForm as a
collection
}
function getUserList_result(event) {
userList=event.result;
}
function getResultList_result(event) {
resultList=event.result;
}
/mx:Script
mx:RemoteObject id=ro
source=com.chl.dataaccess.CloserDataAccess
mx:method name=getResults result=getResultList_result
(event)/
/mx:RemoteObject
mx:DataGrid id=dg dataProvider={resultList}
width=838
editable=true showHeaders=true
mx:columns
mx:Array
mx:DataGridColumn columnName=firstname
headerText=Firstname/
mx:DataGridColumn columnName=lastname
headerText=Lastname/
/mx:Array
/mx:columns
/mx:DataGrid
** This is the situation i'm in now, we're going to develop
new
apps
using RIA
[flexcoders] Re: Java POJO/Action Script question
I think that design is fine. I use a similar approach, except that my
POJOs are a combination of entity objects + dataaccess method, i.e.
each class has a getList() method that returns a list of all known
instances of that type. I chose that approach because these were
POJOs written explicitly with Flex in mind, since this was a new
project with no existing codebase to work from. It's entirely up to
you how much separation you want between data access and the objects
themselves.
A case where you might be forced to use a facade class is when you
have a private member that is determined dynamically in code and
accessed only through a getter. In this instance, you could write
another class that calls the first class's getter and sets a public
member variable to the results. This new class would be what your
RemoteObject calls from Flex.
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED] wrote:
Thanks Doug,
Now i understand. Let me ask you a question then, my design consists
of 2 parts, i have entity objects and dataaccess objects, each time
i do a method call in dataaccess obj and it returns either a
collection of entity objects or single entity objects to client.
Is this a right way to do or should i use some facade patterns, what
do you think, since i'm coming struts background it's kind of
learning curve for me using flex. I'm not using any EJB's for our
application. It's a simple 3 tier arch.
thanks
--- In flexcoders@yahoogroups.com, douglowder douglowder@
wrote:
It isn't a case of need. One reason you might *want* to have
public
members in your POJO is for convenience. Flex will automatically
handle conversion of Java strings (as well as several other types;
check the documentation) to actionscript, so if your RemoteObject
returns a collection of POJOs with public String members you can
plug
that list directly into a grid's dataprovider without any extra
actionscript code. This would correspond to collections of ClassA
and
ClassB objects, which map nicely to what dataProviders expect. You
cannot, however, pass a list of Class1 POJOs and expect the
datagrid
to display Class1.ClassA.A1, Class1.ClassB.B1, etc., without doing
some extra work on the actionscript side. See the difference?
Now, this doesn't mean you *have* to do things either one way or
another. I'm just trying to explain what I personally think is the
easiest way to get POJO data into a dataGrid in Flex. If this
still
isn't clear, let me know and I'll try to provide some working code.
Hope that helps!
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 sshriyan27@
wrote:
Thanks guys for helping me out here, but still i don't
understand
why should i need to have public members firstname,lastname etc
in
the CloserResultsForm form, isn't it involves redundancy and
hard to
maintain lots of member variables.
all i want is this,
Class1 instanciate class A, class B, Class A has member
variables
A1,A2 and Class B has B1,B2 etc,
if i want to display A1, B1 values using Class1,
i should be saying classA.A1,classA.A2, ClassB.B1, ClassB.B2 etc,
i don't want to declare A1,A2 in Class1 again in 2 palces.
Am i missing something here about my design pattern? May be i'm
confused.
Pls help me soon.
--- In flexcoders@yahoogroups.com, douglowder douglowder@
wrote:
You're almost there! What you want is for CloserDataAccess to
return
a list of objects that contain firstname and lastname
properties.
What you have now is a list of objects that contain other
objects
(the
UserProfileForms), which then contain firstname and lastname.
If your CloserResultsForm java class had public members
firstname
and
lastname, initialized by calling the proper getters from
UserProfileForm, your datagrid should work. This wouldn't even
require the separate ActionScript classes for
CloserResultsForm and
UserProfileForm.
Doug
--- In flexcoders@yahoogroups.com, sshriyan27
[EMAIL PROTECTED]
wrote:
Thanks but still not working i made them private now.
I'm totally lost with action script and object mapping.
Do i need to use action script for the value objects i have,
if
that
so is there any easy way to write action scripts same as the
java
objects.
mx:Application
xmlns:mx=http://www.macromedia.com/2003/mxml;
initialize=initApp() xmlns:i2view=view pageTitle=Test
Application
mx:Script
import src.com.flex.form.*;
var users: Array;
var upForm: UserProfileForm;
var closerResultsForm: CloserResultsForm;
var userList: Array;
var resultList: Array;
function initApp() {
ro.getResults(); // returns
CloserResultsForm as
Re: [flexcoders] Re: Java POJO/Action Script question
Other option would be to use free products like
beanshell to give you access to the local variables - youcould build
facade class dynamically or just provide "transparency gateway" proxy. The fact
that you are converting J2EE application indicates that amount of data is not
significant, so the cost is not going to be an issue, and you can reuse proxy
for subsequent calls.
In the end, it would be just a migration support
excercise, as your current J2EE code will be changing so much, it would not make
sense to keep the old one - Java interpreter is fine as long as it is not high
callvolume system.
HTH,
Anatole Tartakovsky
- Original Message -
From:
Dave Wolf
To: flexcoders@yahoogroups.com
Sent: Tuesday, January 24, 2006 8:59
AM
Subject: [flexcoders] Re: Java
POJO/Action Script question
Ahh yes, the same J2EE struggles with property
setting. As Doug saysyou do not want to be calling a million setters
on a remote object.You are better off refactoring this to either create a
new ValueObject, or to treat your existing class itself as a value
object. So rather then getting a remote reference to say
UserProfileForm, thencalling a million getters and setters, I would create
a POJO whichreturns the UserProfileForm as a return type. Then call
all yoursetters locally, and pass it back up to the server as the
parameter toanother POJO method call.The second option is to add a
new Value Object property to theUserProfileForm. Again create the
stub, call all the setters on thelocal value object, then call one call on
the UserProfileForm toreturn this coarsly grained Value Object.You
need to keep network calls in mind in your architecture. There isa
graveyard filled with failed J2EE projects who ignored the networkand the
effects of not architecting around seriously reducing thenumber and size
of remote calls.-- Dave WolfCynergy Systems,
Inc.Macromedia Flex Alliance Partnerhttp://www.cynergysystems.comEmail:
[EMAIL PROTECTED]Office: 866-CYNERGY--- In
flexcoders@yahoogroups.com, "douglowder" [EMAIL PROTECTED]
wrote: Flex 1.5 does a pretty good job of automatically
translating Java types to ActionScript, but only for members that are
declared public, not private. So, if you want to continue using
your getter routines for private members in your existing classes, be
prepared to make a lot of calls to your remote object. You
could also create a new "facade" Java class for mapping purposes,
which would have public members for all the variables you want to
expose to ActionScript, and have that class make all the calls to
your existing class's getters to initialize those public
members. You can then refer to the variables by name (the same
name as in the Java class) from within ActionScript.
Another thing to keep in mind is that datagrids expect to be passed
arrays (actually, anything that implements the DataProvider
interface) of objects, not a single object. If your Java calls are
returning a single object instead of a list of objects, use
mx.utils.ArrayUtil.toArray() on the result to convert it to an array
in ActionScript. Doug --- In
flexcoders@yahoogroups.com, "sshriyan27" [EMAIL PROTECTED]
wrote: I'm new to Flex we're trying evaluate in our
company whether we should use FLEX or not. Right we have Java,
Struts based application.I have a simple
question, i have an Object and still strugling to map that to an
action script and datagrid. How do i display values of
UserProfileForm in datagrid, like in Struts i used to do
CloserResultsForm.userProfileForm.firstname (); Can some
one explain this to me. ** I can get the Single object to get
displayed but not the inhertited ones.
public class CloserResultsForm implements Serializable{
private UserProfileForm
userProfileForm; }public class
UserProfileForm { private String
username=null; private int
userid; private String
password=null; private String
firstname=null; private String
lastname=null; private String
roleName=null;
public UserProfileForm(){
} // then getters and
setters for the above }
--
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[flexcoders] Re: Java POJO/Action Script question
Let me send you all my classes, i don't still understand! Thanks for
your help anyway.
public class UserProfileForm {
public String firstname=null;
public String lastname=null;
public UserProfileForm(){}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
}
public class CloserResultsForm implements Serializable{
public UserProfileForm userProfileForm;
public CloserResultsForm(){
userProfileForm=new UserProfileForm();
}
public UserProfileForm getUserProfileForm() {
return userProfileForm;
}
public void setUserProfileForm(UserProfileForm
userProfileForm) {
this.userProfileForm = userProfileForm;
}
}
** my dataaccess returns collection of CloserResultsForm
CloserResultsForm.as file
class src.com.flex.form.CloserResultsForm{
public var userProfileForm : UserProfileForm;
static var registered=Object.registerClass
(com.chl.form.CloserResultsForm,
src.com.flex.form.CloserResultsForm);
public function CloserResultsForm(){
this.userProfileForm=new UserProfileForm();
}
}
UserProfileForm.as file
class src.com.flex.form.UserProfileForm{
public var firstname:String;
public var lastname:String;
public var _remoteClass;
static var registered=Object.registerClass
(com.chl.form.UserProfileForm, src.com.flex.form.UserProfileForm);
}
How do i print the firstname and lastname in datagrid, am i missing
something here.
--- In flexcoders@yahoogroups.com, Dave Wolf [EMAIL PROTECTED] wrote:
Ahh yes, the same J2EE struggles with property setting. As Doug
says
you do not want to be calling a million setters on a remote object.
You are better off refactoring this to either create a new Value
Object, or to treat your existing class itself as a value object.
So rather then getting a remote reference to say UserProfileForm,
then
calling a million getters and setters, I would create a POJO which
returns the UserProfileForm as a return type. Then call all your
setters locally, and pass it back up to the server as the
parameter to
another POJO method call.
The second option is to add a new Value Object property to the
UserProfileForm. Again create the stub, call all the setters on
the
local value object, then call one call on the UserProfileForm to
return this coarsly grained Value Object.
You need to keep network calls in mind in your architecture.
There is
a graveyard filled with failed J2EE projects who ignored the
network
and the effects of not architecting around seriously reducing the
number and size of remote calls.
--
Dave Wolf
Cynergy Systems, Inc.
Macromedia Flex Alliance Partner
http://www.cynergysystems.com
Email: [EMAIL PROTECTED]
Office: 866-CYNERGY
--- In flexcoders@yahoogroups.com, douglowder [EMAIL PROTECTED]
wrote:
Flex 1.5 does a pretty good job of automatically translating
Java
types to ActionScript, but only for members that are declared
public, not private. So, if you want to continue using your
getter
routines for private members in your existing classes, be
prepared
to make a lot of calls to your remote object. You could also
create
a new facade Java class for mapping purposes, which would have
public members for all the variables you want to expose to
ActionScript, and have that class make all the calls to your
existing class's getters to initialize those public members.
You
can then refer to the variables by name (the same name as in the
Java class) from within ActionScript.
Another thing to keep in mind is that datagrids expect to be
passed
arrays (actually, anything that implements the DataProvider
interface) of objects, not a single object. If your Java calls
are
returning a single object instead of a list of objects, use
mx.utils.ArrayUtil.toArray() on the result to convert it to an
array
in ActionScript.
Doug
--- In flexcoders@yahoogroups.com, sshriyan27
[EMAIL PROTECTED]
wrote:
I'm new to Flex we're trying evaluate in our company whether
we
should use FLEX or not. Right we have Java, Struts based
application.
I have a simple question, i have an Object and still strugling
to
map that to an action script and datagrid.
How do i display values of UserProfileForm in datagrid, like
in
Struts i used to do
CloserResultsForm.userProfileForm.firstname
();
Can some one explain this to me.
** I can get the Single object to get displayed but
[flexcoders] Re: Java POJO/Action Script question
Ah, it looks like you have taken both my *and* Dave's advice, when you
really only needed to do one or the other. So, if you don't have a
problem with making your firstname and lastname variables public in
your UserProfileForm POJO (which you might, since it kind of defeats
the purpose of getters and setters), then just pass your datagrid a
collection of UserProfileForms:
mx:DataGrid dataProvider={myUserProfileFormCollection} /
This will display the entire object in the datagrid. If you only want
to see certain fields, or want to specify a specific order, define
columns for the datagrid like so:
mx:DataGrid dataProvider={myUserProfileFormCollection}
mx:columns
mx:Array
mx:DataGridColumn columnName=firstname
headerText=First Name/
mx:DataGridColumn columnName=lastname
headerText=Last Name/
/mx:Array
/mx:columns
/mx:DataGrid
If, however, you want to keep the members variables of your objects
hidden and provide access only through getters and setters, then
change the declarations back to private and follow Dave's advice.
I hope that helps!
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED] wrote:
Let me send you all my classes, i don't still understand! Thanks for
your help anyway.
public class UserProfileForm {
public String firstname=null;
public String lastname=null;
public UserProfileForm(){}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
}
public class CloserResultsForm implements Serializable{
public UserProfileForm userProfileForm;
public CloserResultsForm(){
userProfileForm=new UserProfileForm();
}
public UserProfileForm getUserProfileForm() {
return userProfileForm;
}
public void setUserProfileForm(UserProfileForm
userProfileForm) {
this.userProfileForm = userProfileForm;
}
}
** my dataaccess returns collection of CloserResultsForm
CloserResultsForm.as file
class src.com.flex.form.CloserResultsForm{
public var userProfileForm : UserProfileForm;
static var registered=Object.registerClass
(com.chl.form.CloserResultsForm,
src.com.flex.form.CloserResultsForm);
public function CloserResultsForm(){
this.userProfileForm=new UserProfileForm();
}
}
UserProfileForm.as file
class src.com.flex.form.UserProfileForm{
public var firstname:String;
public var lastname:String;
public var _remoteClass;
static var registered=Object.registerClass
(com.chl.form.UserProfileForm, src.com.flex.form.UserProfileForm);
}
How do i print the firstname and lastname in datagrid, am i missing
something here.
--- In flexcoders@yahoogroups.com, Dave Wolf [EMAIL PROTECTED] wrote:
Ahh yes, the same J2EE struggles with property setting. As Doug
says
you do not want to be calling a million setters on a remote object.
You are better off refactoring this to either create a new Value
Object, or to treat your existing class itself as a value object.
So rather then getting a remote reference to say UserProfileForm,
then
calling a million getters and setters, I would create a POJO which
returns the UserProfileForm as a return type. Then call all your
setters locally, and pass it back up to the server as the
parameter to
another POJO method call.
The second option is to add a new Value Object property to the
UserProfileForm. Again create the stub, call all the setters on
the
local value object, then call one call on the UserProfileForm to
return this coarsly grained Value Object.
You need to keep network calls in mind in your architecture.
There is
a graveyard filled with failed J2EE projects who ignored the
network
and the effects of not architecting around seriously reducing the
number and size of remote calls.
--
Dave Wolf
Cynergy Systems, Inc.
Macromedia Flex Alliance Partner
http://www.cynergysystems.com
Email: [EMAIL PROTECTED]
Office: 866-CYNERGY
--- In flexcoders@yahoogroups.com, douglowder [EMAIL PROTECTED]
wrote:
Flex 1.5 does a pretty good job of automatically translating
Java
types to ActionScript, but only for members that are declared
public, not private. So, if you want to continue using your
getter
routines for private members in your existing classes, be
prepared
to make a lot of calls to your remote object. You could also
create
a new facade Java class for mapping purposes, which would have
[flexcoders] Re: Java POJO/Action Script question
Thanks but still not working i made them private now.
I'm totally lost with action script and object mapping.
Do i need to use action script for the value objects i have, if that
so is there any easy way to write action scripts same as the java
objects.
mx:Application xmlns:mx=http://www.macromedia.com/2003/mxml;
initialize=initApp() xmlns:i2view=view pageTitle=Test
Application
mx:Script
import src.com.flex.form.*;
var users: Array;
var upForm: UserProfileForm;
var closerResultsForm: CloserResultsForm;
var userList: Array;
var resultList: Array;
function initApp() {
ro.getResults(); // returns CloserResultsForm as a
collection
}
function getUserList_result(event) {
userList=event.result;
}
function getResultList_result(event) {
resultList=event.result;
}
/mx:Script
mx:RemoteObject id=ro
source=com.chl.dataaccess.CloserDataAccess
mx:method name=getResults result=getResultList_result
(event)/
/mx:RemoteObject
mx:DataGrid id=dg dataProvider={resultList} width=838
editable=true showHeaders=true
mx:columns
mx:Array
mx:DataGridColumn columnName=firstname
headerText=Firstname/
mx:DataGridColumn columnName=lastname
headerText=Lastname/
/mx:Array
/mx:columns
/mx:DataGrid
** This is the situation i'm in now, we're going to develop new apps
using RIA technology, we don't have time to learn action scripts or
any other vedor specific scripts. so i'm trying to convince that
flex is the best solution, but it looks like flex dev is not rapid
as what i saw from demo, still lots of manual coding has to be done.
May be i'm not understanding fully about flex.
So can you guys tell me whether i should use flex or coldfushion or
ajax with struts as i did before.
Thanks
--- In flexcoders@yahoogroups.com, douglowder [EMAIL PROTECTED]
wrote:
Ah, it looks like you have taken both my *and* Dave's advice, when
you
really only needed to do one or the other. So, if you don't have a
problem with making your firstname and lastname variables public in
your UserProfileForm POJO (which you might, since it kind of
defeats
the purpose of getters and setters), then just pass your datagrid a
collection of UserProfileForms:
mx:DataGrid dataProvider={myUserProfileFormCollection} /
This will display the entire object in the datagrid. If you only
want
to see certain fields, or want to specify a specific order, define
columns for the datagrid like so:
mx:DataGrid dataProvider={myUserProfileFormCollection}
mx:columns
mx:Array
mx:DataGridColumn columnName=firstname
headerText=First Name/
mx:DataGridColumn columnName=lastname
headerText=Last Name/
/mx:Array
/mx:columns
/mx:DataGrid
If, however, you want to keep the members variables of your objects
hidden and provide access only through getters and setters, then
change the declarations back to private and follow Dave's advice.
I hope that helps!
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED]
wrote:
Let me send you all my classes, i don't still understand! Thanks
for
your help anyway.
public class UserProfileForm {
public String firstname=null;
public String lastname=null;
public UserProfileForm(){}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
}
public class CloserResultsForm implements Serializable{
public UserProfileForm userProfileForm;
public CloserResultsForm(){
userProfileForm=new UserProfileForm();
}
public UserProfileForm getUserProfileForm() {
return userProfileForm;
}
public void setUserProfileForm(UserProfileForm
userProfileForm) {
this.userProfileForm = userProfileForm;
}
}
** my dataaccess returns collection of CloserResultsForm
CloserResultsForm.as file
class src.com.flex.form.CloserResultsForm{
public var userProfileForm : UserProfileForm;
static var registered=Object.registerClass
(com.chl.form.CloserResultsForm,
src.com.flex.form.CloserResultsForm);
public function CloserResultsForm(){
this.userProfileForm=new UserProfileForm();
}
}
UserProfileForm.as file
class src.com.flex.form.UserProfileForm{
public var firstname:String;
public var lastname:String;
public
[flexcoders] Re: Java POJO/Action Script question
You're almost there! What you want is for CloserDataAccess to return
a list of objects that contain firstname and lastname properties.
What you have now is a list of objects that contain other objects (the
UserProfileForms), which then contain firstname and lastname.
If your CloserResultsForm java class had public members firstname and
lastname, initialized by calling the proper getters from
UserProfileForm, your datagrid should work. This wouldn't even
require the separate ActionScript classes for CloserResultsForm and
UserProfileForm.
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED] wrote:
Thanks but still not working i made them private now.
I'm totally lost with action script and object mapping.
Do i need to use action script for the value objects i have, if that
so is there any easy way to write action scripts same as the java
objects.
mx:Application xmlns:mx=http://www.macromedia.com/2003/mxml;
initialize=initApp() xmlns:i2view=view pageTitle=Test
Application
mx:Script
import src.com.flex.form.*;
var users: Array;
var upForm: UserProfileForm;
var closerResultsForm: CloserResultsForm;
var userList: Array;
var resultList: Array;
function initApp() {
ro.getResults(); // returns CloserResultsForm as a
collection
}
function getUserList_result(event) {
userList=event.result;
}
function getResultList_result(event) {
resultList=event.result;
}
/mx:Script
mx:RemoteObject id=ro
source=com.chl.dataaccess.CloserDataAccess
mx:method name=getResults result=getResultList_result
(event)/
/mx:RemoteObject
mx:DataGrid id=dg dataProvider={resultList} width=838
editable=true showHeaders=true
mx:columns
mx:Array
mx:DataGridColumn columnName=firstname
headerText=Firstname/
mx:DataGridColumn columnName=lastname
headerText=Lastname/
/mx:Array
/mx:columns
/mx:DataGrid
** This is the situation i'm in now, we're going to develop new apps
using RIA technology, we don't have time to learn action scripts or
any other vedor specific scripts. so i'm trying to convince that
flex is the best solution, but it looks like flex dev is not rapid
as what i saw from demo, still lots of manual coding has to be done.
May be i'm not understanding fully about flex.
So can you guys tell me whether i should use flex or coldfushion or
ajax with struts as i did before.
Thanks
--- In flexcoders@yahoogroups.com, douglowder [EMAIL PROTECTED]
wrote:
Ah, it looks like you have taken both my *and* Dave's advice, when
you
really only needed to do one or the other. So, if you don't have a
problem with making your firstname and lastname variables public in
your UserProfileForm POJO (which you might, since it kind of
defeats
the purpose of getters and setters), then just pass your datagrid a
collection of UserProfileForms:
mx:DataGrid dataProvider={myUserProfileFormCollection} /
This will display the entire object in the datagrid. If you only
want
to see certain fields, or want to specify a specific order, define
columns for the datagrid like so:
mx:DataGrid dataProvider={myUserProfileFormCollection}
mx:columns
mx:Array
mx:DataGridColumn columnName=firstname
headerText=First Name/
mx:DataGridColumn columnName=lastname
headerText=Last Name/
/mx:Array
/mx:columns
/mx:DataGrid
If, however, you want to keep the members variables of your objects
hidden and provide access only through getters and setters, then
change the declarations back to private and follow Dave's advice.
I hope that helps!
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED]
wrote:
Let me send you all my classes, i don't still understand! Thanks
for
your help anyway.
public class UserProfileForm {
public String firstname=null;
public String lastname=null;
public UserProfileForm(){}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
}
public class CloserResultsForm implements Serializable{
public UserProfileForm userProfileForm;
public CloserResultsForm(){
userProfileForm=new UserProfileForm();
}
public UserProfileForm getUserProfileForm() {
return userProfileForm;
}
public void
[flexcoders] Re: Java POJO/Action Script question
Flex 1.5 does a pretty good job of automatically translating Java
types to ActionScript, but only for members that are declared
public, not private. So, if you want to continue using your getter
routines for private members in your existing classes, be prepared
to make a lot of calls to your remote object. You could also create
a new facade Java class for mapping purposes, which would have
public members for all the variables you want to expose to
ActionScript, and have that class make all the calls to your
existing class's getters to initialize those public members. You
can then refer to the variables by name (the same name as in the
Java class) from within ActionScript.
Another thing to keep in mind is that datagrids expect to be passed
arrays (actually, anything that implements the DataProvider
interface) of objects, not a single object. If your Java calls are
returning a single object instead of a list of objects, use
mx.utils.ArrayUtil.toArray() on the result to convert it to an array
in ActionScript.
Doug
--- In flexcoders@yahoogroups.com, sshriyan27 [EMAIL PROTECTED]
wrote:
I'm new to Flex we're trying evaluate in our company whether we
should use FLEX or not. Right we have Java, Struts based
application.
I have a simple question, i have an Object and still strugling to
map that to an action script and datagrid.
How do i display values of UserProfileForm in datagrid, like in
Struts i used to do CloserResultsForm.userProfileForm.firstname
();
Can some one explain this to me.
** I can get the Single object to get displayed but not the
inhertited ones.
public class CloserResultsForm implements Serializable{
private UserProfileForm userProfileForm;
}
public class UserProfileForm {
private String username=null;
private int userid;
private String password=null;
private String firstname=null;
private String lastname=null;
private String roleName=null;
public UserProfileForm(){
}
// then getters and setters for the above
}
--
Flexcoders Mailing List
FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt
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