Tapestry 5.1 and multivalued parameters

[R. Duval]

Folks,

I'm trying to use a form with multivalued parameters in tapestry but I'm not sure if it supports this kind of feature or how it does. I searched the web for some clues but couldn't find any decent information about multi parameters request using this framework.

The problem is I'm generating a grid and in one cell I'm using a TextField which is supposed to be multivalued, this way:

    <!-- Template code -->
    <t:Form t:id="someForm">
	    <t:Grid t:source="myObject.myList" t:row="item">
	        <t:Parameter name="specialValueCell">
	            <t:TextField t:size="5" t:value="newSpecialValue" />
	        </t:Parameter>
	    </t:Grid>
	    <div style="text-align: center;">
	       <input type="submit" value="Submit" t:type="Submit" t:id="submitButton" />
	    </div>
    </t:Form>

My page's java component:

...
// All properties, like myObject, item and their setters and getters
...
// I tried a collection of strings like Struts2 but got an exception.
private String newSpecialValue;

// Of course it only prints the last newSpecialValue value.
@OnEvent(component="someForm", value=EventConstants.SUBMIT)
void onSubmitForm() {
    System.out.println("New Special Value: "+newSpecialValue);
}
...

Trying to set the newSpecialValue as a Collection<String> (something like WebWork OGNL type conversion) gave me an exception: Render queue error in BeginRender[Index:textfield]: Parameter 'translate' of component Index:textfield is bound to null. This parameter is not allowed to be null.

If anyone has any clue or a link with information I'd be very glad.

[R. Duval]

For those with the same issue, an interesting resource may be this one:

http://jumpstart.doublenegative.com.au:8080/jumpstart/examples/tables/editablegrid1

The link was provided by Otho from tapestry users list. Very good one.