Visual Web Designer: Bind an EJB3 entity bean to a dropdown list

[heapifyman]

Hello.

I'd like to know if there is a way to bind an EJB3 entity bean (or
rather a collection or array thereof) to a dropdown list (comboboy) in
the JSF visual web designer.
I have tried the tutorials and there it is only explained how to bind an
entity bean to a table.
The other tutorial only explains how to use a DataProvider to bind the
database table data to a dropdown list.

Is there some information on how to do that with using EJB3 entity beans?
E.g.: I have a stateless session bean that has a getAll() method and
returns all the entries from one database table in form of a
List<MyEntityBean>. I can access that session bean from my JSF app and
the list is also returned, but I don't know how to tell the page in the
visual web designer that I want that list in the dropdown list with the
entity's id as the value and one of it's string attributes as the
displayed value.

Thanks in advance.
Kind regards.

[HandyGeek]

Hello heapifyman,
Sorry to not answer you directly, but I found a fantastic JSF blog written by a fellow called BalusC - while you are waiting for a reply here, check out:  http://balusc.blogspot.com/2007/12/action-dependent-requireness.html
along with his other postings -- great stuff! I hope this helps!

Best, David

 -------------- Original message ----------------------
From: heapifyman <heapifyman@...>

> Hello.
>
> I'd like to know if there is a way to bind an EJB3 entity bean (or
> rather a collection or array thereof) to a dropdown list (comboboy) in
> the JSF visual web designer.
> I have tried the tutorials and there it is only explained how to bind an
> entity bean to a table.
> The other tutorial only explains how to use a DataProvider to bind the
> database table data to a dropdown list.
>
> Is there some information on how to do that with using EJB3 entity beans?
> E.g.: I have a stateless session bean that has a getAll() method and
> returns all the entries from one database table in form of a
> List<MyEntityBean>. I can access that session bean from my JSF app and
> the list is also returned, but I don't know how to tell the page in the
> visual web designer that I want that list in the dropdown list with the
> entity's id as the value and one of it's string attributes as the
> displayed value.
>
> Thanks in advance.
> Kind regards.

[Panagiotis Halatsakos]

Some parts of this message have been removed. Learn more about Nabble's security policy.

check this blog entry for insights: http://weblogs.java.net/blog/pkeegan/archive/2007/10/binding_jcombob.html

On 16/01/2008, thompsonwd40@... <thompsonwd40@...> wrote:

Hello heapifyman,
Sorry to not answer you directly, but I found a fantastic JSF blog written by a fellow called BalusC - while you are waiting for a reply here, check out:   http://balusc.blogspot.com/2007/12/action-dependent-requireness.html
along with his other postings -- great stuff! I hope this helps!

Best, David

-------------- Original message ----------------------
From: heapifyman <heapifyman@...>

> Hello.
>
> I'd like to know if there is a way to bind an EJB3 entity bean (or
> rather a collection or array thereof) to a dropdown list (comboboy) in
> the JSF visual web designer.
> I have tried the tutorials and there it is only explained how to bind an
> entity bean to a table.
> The other tutorial only explains how to use a DataProvider to bind the
> database table data to a dropdown list.
>
> Is there some information on how to do that with using EJB3 entity beans?
> E.g.: I have a stateless session bean that has a getAll() method and
> returns all the entries from one database table in form of a
> List<MyEntityBean>. I can access that session bean from my JSF app and
> the list is also returned, but I don't know how to tell the page in the
> visual web designer that I want that list in the dropdown list with the
> entity's id as the value and one of it's string attributes as the
> displayed value.
>
> Thanks in advance.
> Kind regards.

[Patrick Keegan]

Panagiotis Halatsakos wrote:
> check this blog entry for insights:
> http://weblogs.java.net/blog/pkeegan/archive/2007/10/binding_jcombob.html
I love it when people link to my blogs. Unfortunately, this one is about
Swing beans binding, which is somewhat different than binding in JSF.

-Patrick

>
>
> On 16/01/2008, *thompsonwd40@...
> <mailto:thompsonwd40@...>* <thompsonwd40@...
> <mailto:thompsonwd40@...>> wrote:
>
>     Hello heapifyman,
>     Sorry to not answer you directly, but I found a fantastic JSF blog
>     written by a fellow called BalusC - while you are waiting for a
>     reply here, check out:  
>     http://balusc.blogspot.com/2007/12/action-dependent-requireness.html
>     along with his other postings -- great stuff! I hope this helps!
>
>     Best, David
>
>     -------------- Original message ----------------------
>     From: heapifyman <heapifyman@... <mailto:heapifyman@...>>
>     > Hello.
>     >
>     > I'd like to know if there is a way to bind an EJB3 entity bean (or
>     > rather a collection or array thereof) to a dropdown list
>     (comboboy) in
>     > the JSF visual web designer.
>     > I have tried the tutorials and there it is only explained how to
>     bind an
>     > entity bean to a table.
>     > The other tutorial only explains how to use a DataProvider to
>     bind the
>     > database table data to a dropdown list.
>     >
>     > Is there some information on how to do that with using EJB3
>     entity beans?
>     > E.g.: I have a stateless session bean that has a getAll() method and
>     > returns all the entries from one database table in form of a
>     > List<MyEntityBean>. I can access that session bean from my JSF
>     app and
>     > the list is also returned, but I don't know how to tell the page
>     in the
>     > visual web designer that I want that list in the dropdown list
>     with the
>     > entity's id as the value and one of it's string attributes as the
>     > displayed value.
>     >
>     > Thanks in advance.
>     > Kind regards.
>
>

[tmasunda]

You can create an objectListDataProvider like this

public class MyDataProvider extends ObjectListDataProvider {

    private ArrayList list;

    public MyDataProvider () {
        MyEntityBean entityBean= new MyEntityBean();
        list = new ArrayList();
        list.add(entityBean);
        setList(list);
    }
}

you the go to sessionbean1 and create a reference to the dataprovider as a property:

private MyDataProvider myData = new MyDataProvider();

create the getter and setter

You should now be able to access the dataprovider for binding to the dropdown.

right click the dropdown and go to property bindings > options . Select the value and display properties.

in your code your can then load the list as follows:

(you wrote:I have a stateless session bean that has a getAll() method)

getSessionBean1().getMyData().setList(getStatelessSessionBean.getAll());

and this would set the options for your dropdown list

regards

heapifyman wrote:

Hello.

I'd like to know if there is a way to bind an EJB3 entity bean (or
rather a collection or array thereof) to a dropdown list (comboboy) in
the JSF visual web designer.
I have tried the tutorials and there it is only explained how to bind an
entity bean to a table.
The other tutorial only explains how to use a DataProvider to bind the
database table data to a dropdown list.

Is there some information on how to do that with using EJB3 entity beans?
E.g.: I have a stateless session bean that has a getAll() method and
returns all the entries from one database table in form of a
List<MyEntityBean>. I can access that session bean from my JSF app and
the list is also returned, but I don't know how to tell the page in the
visual web designer that I want that list in the dropdown list with the
entity's id as the value and one of it's string attributes as the
displayed value.

Thanks in advance.
Kind regards.

[Panagiotis Halatsakos]

Sorry!

:| I haven't gotten into JSF yet (and probably won't because I am a PHP guy when it comes to web)

But I found it very useful for the binding of drop down menus, I get to do a little thread hijacking and saying thanks for that article.

On 17/01/2008, Patrick Keegan <Patrick.Keegan@...> wrote:

Panagiotis Halatsakos wrote:
> check this blog entry for insights:
> http://weblogs.java.net/blog/pkeegan/archive/2007/10/binding_jcombob.html
I love it when people link to my blogs. Unfortunately, this one is about
Swing beans binding, which is somewhat different than binding in JSF.

-Patrick

>
>
> On 16/01/2008, *thompsonwd40@...
> <mailto:thompsonwd40@...>* <thompsonwd40@...
> <mailto:thompsonwd40@...>> wrote:
>
>     Hello heapifyman,
>     Sorry to not answer you directly, but I found a fantastic JSF blog
>     written by a fellow called BalusC - while you are waiting for a
>     reply here, check out:
>     http://balusc.blogspot.com/2007/12/action-dependent-requireness.html
>     along with his other postings -- great stuff! I hope this helps!
>
>     Best, David
>
>     -------------- Original message ----------------------
>     From: heapifyman <heapifyman@... <mailto:heapifyman@...>>
>     > Hello.
>     >
>     > I'd like to know if there is a way to bind an EJB3 entity bean (or
>     > rather a collection or array thereof) to a dropdown list
>     (comboboy) in
>     > the JSF visual web designer.
>     > I have tried the tutorials and there it is only explained how to
>     bind an
>     > entity bean to a table.
>     > The other tutorial only explains how to use a DataProvider to
>     bind the
>     > database table data to a dropdown list.
>     >
>     > Is there some information on how to do that with using EJB3
>     entity beans?
>     > E.g.: I have a stateless session bean that has a getAll() method and
>     > returns all the entries from one database table in form of a
>     > List<MyEntityBean>. I can access that session bean from my JSF
>     app and
>     > the list is also returned, but I don't know how to tell the page
>     in the
>     > visual web designer that I want that list in the dropdown list
>     with the
>     > entity's id as the value and one of it's string attributes as the
>     > displayed value.
>     >
>     > Thanks in advance.
>     > Kind regards.
>
>

[heapifyman]

thompsonwd40@... schrieb:
> Hello heapifyman,
> Sorry to not answer you directly, but I found a fantastic JSF blog written by a fellow called BalusC - while you are waiting for a reply here, check out:  http://balusc.blogspot.com/2007/12/action-dependent-requireness.html
> along with his other postings -- great stuff! I hope this helps!

Thanks, that sent me in the right direction.