One @Factory ?

[nimo22]

Hi,

I am writing a xhtml-Page having multiple selectOneMenus.
my bean:

How can I develop only ONE @Factory-Method in which all lists are generated and referenced by their list-Name?

I have tried to do this..

but this does NOT work:

...
List<Person> aList;
List<Product> bList;

@Factory("init")
public void initLists() {

aList =  entityManager.createQuery("from Person a").getResultList();

bList =  entityManager.createQuery("from Product b").getResultList();

 }
...

my view:

<!-- Select Person -->
<s:label styleClass="label">Person: </s:label>
<h:selectOneMenu value ="#{person.name}" id="name">
<s:selectItems value="#{aList}" var="a" label="#{a.name}"/>
</h:selectOneMenu>

<!-- Select Product -->
<s:label styleClass="label">Product: </s:label>
<h:selectOneMenu value="#{product.desc}" id="desc">
<f:selectItems value="#{bList}" var="b" label="#{b.desc}"/>
</h:selectOneMenu>

But this will work:

...

public List<Person> initPersonList() {

return entityManager.createQuery("from Person a").getResultList();
}

public List<Product> initProductList() {
return entityManager.createQuery("from Product b").getResultList();
}
...

my view:

<!-- Select Person -->
<s:label styleClass="label">Person: </s:label>
<h:selectOneMenu value ="#{person.name}" id="name">
<s:selectItems value="#{initPersonList()}" var="a" label="#{a.name}"/>
</h:selectOneMenu>

<!-- Select Product -->
<s:label styleClass="label">Product: </s:label>
<h:selectOneMenu value="#{product.desc}" id="desc">
<f:selectItems value="#{initProductList()}" var="b" label="#{b.desc}"/>
</h:selectOneMenu>

How can I develop only ONE @Factory-Method in which all lists are generated and referenced by their list-Name?

[wrzep]

Heya,

This seems to be a bit weird requirement. Why not 2 factories? :)

Anyway, here:

nimo mayr wrote on Jun 18, 2008 13:20:

...
List<Person> aList;
List<Product> bList;

@Factory("init")
public void initLists() {

aList =  entityManager.createQuery("from Person a").getResultList();

bList =  entityManager.createQuery("from Product b").getResultList();

 }
...

you have to provide a a name of the returned Seam Component in the @Factory attribute. So, it should be @Factory("aList"). You can't provide 2 names... The thing you can do is mark bList with @Out and have it outjected when the factory method for aList is triggered.

Cheers

-Pawel

[nimo22]

yes, indeed. It s really better to write 2 Factories!..(or one with an @Create-Annotation?) I guess, I take 2 Factories.

thanks:-)

[endyamon]

what about using one @Create instead of many @Factories to initialize your component?

[jnusaira]

FWIW the @Factory is only going to do a lookup when you actually use the item.

In your example you never call init inside the xhtml hence why it doesnt work.

The @Create annotation according to the doco is really only for non Session Beans.

I had kindof the same problem as you.

What i did i had the SLSB with a @PostConstruct on it.

Then the factories were tied to the retrieve methods of each item. Of course in my example the retrieves were necessary anyway since a non Seam EJB needed access to them.

[nimo22]

Okay, indeed, I use two @Factory-Methods and declared both with names:

..
@Factory("initListA")
public void initListA(){..}
..
@Factory("initListB")
public void initListB(){..}
..

Now I can take an xhtml and referenced the factories in it. It works without problems:-)

But now, I will reach the same with an @Create-Annotation in a Stateful SB:

...
List<SelectItem> selectListA = new ArrayList<SelectItem>();
List<SelectItem> selectListB = new ArrayList<SelectItem>();

@Create @Begin
public void initSession() {

selectListA = entityManager.createQuery("from TableA a").getResultList();
selectListB = entityManager.createQuery("from TableB b").getResultList();

}
...

Normally, the reference in xhtml should be like:

<!-- Select List A -->
..
<h:selectOneMenu value ="#{listA.row}" id="row">
<s:selectItems value="#{selectListA}" var="a" label="#{a.row}" id="selectTeam"/>
</h:selectOneMenu>

But the reference 'selectListA' does not work!

Why? Have I use the @PostConstruct?

[nimo22]

Oh, I forgot the GETTERS for the two Lists..now it works with the @Create-Annotation.

bye:-)