Can I bind form controls to hashtable like a pojo?

[luxspes]

Hi!
I know it is really easy to bind form elements to a POJO... but I am having an special case where a form is dynamically generated at runtime, and I want to bind all the elements in a page to a Hashtable in my controller...

Can I bind my JSF controls to a Hashtable in the same way I do it with a Pojo? or should I use a different technique to deal with forms dynamically generated at runtime?

Thanks.
Regards,

LuxSpes

[stefans]

hi

yes, it is possible to use a HashMap (or afaik any type of Map) to dynamically map values to your JSF controls. I did it like this:

In the Bean I defined a HashMap like this (including getter/setter)

private Map<String, Object> valueMap = new HashMap<String, Object>();

the EL binding then looks like this:

#{BeanName.valueMap['keyString']}

you can also take this further and access a specific property of an POJO within the Map... e.g.:

#{BeanName.valueMap['keyString'].property}

cheers
Stefan

[asavitsky]

Or even

#{BeanName.valueMap.keyString.property}

should do, as long as the keyString doesn't have any spaces/dots/any other funky chars...

[franciscoperedo]

Hi! Thanks for answering!

Your answer is is almost what I am looking for... but...
I am hitting a big wall here... the keyString in

#{BeanName.valueMap['keyString']}

needs to be a variable!

The thing is i am painting an input text for each dynamic field using a repeater... but now.. to bind that with the HashMap, I need to bind each input with a different key in the hashmap... and I can not find the way to do it!!!

Regards,

[keithnaas]

Can you post your xhtml? 

[franciscoperedo]

Hi! thanks!

Here it is (I basically read de structure of the form some
tables in the database, and create it ):

<h:form>
<a:repeat value="#{inventario.plantilla.clasificacionCamposList}"
var="clasificacion">
  <rich:panel>
    <f:facet name="header">#{clasificacion.nombre}</f:facet>
    <a:repeat value="#{clasificacion.camposList}" var="campo">
      <s:decorate template="../layout/edit.xhtml">
      <ui:define name="label">#{campo.nombre}</ui:define>
      <h:selectOneMenu rendered="#{not empty campo.caracteristicaList}">
      <s:selectItems value="#{campo.caracteristicaList}" var="caracteristica"
      label="#{caracteristica.nombre}">
      </s:selectItems>
      <s:convertEntity/>
      </h:selectOneMenu>
      <h:inputText rendered="#{empty campo.caracteristicaList}"></h:inputText>
      </s:decorate>
    </a:repeat>
    <br/>
    <br/>
  </rich:panel>
  <br/>
</a:repeat>
</h:form>

Any hints?

[luxspes]

Here is a simplified version:

 
    <a:repeat value="#{controller.fieldList}" var="field">
      <h:outputText value="#{field.name}"/>
      <h:inputText/>
      </s:decorate>
    </a:repeat>

How do I bind this dynamically generated inputTexts to a HashMap using the field.name? I mean, AFAIK this will not work:

 
    <a:repeat value="#{controller.fieldList}" var="field">
      <h:outputText value="#{field.name}"/>
      <h:inputText #{controller.valueMap[field]}/>
      </s:decorate>
    </a:repeat>

Any hints?

[franciscoperedo]

Hi!
My mistake, the code in my controller had an error, the following works:

 <a:repeat value="#{controller.fieldList}" var="field">
      <h:outputText value="#{field.name}"/>
      <h:inputText #{controller.valueMap[field]}/>
      </s:decorate>
    </a:repeat>

Thanks! Seam is great!

Regards