Best way to retreive an attributeValue from the bindings in a backing bean?

Question

What is the best way to retreive a value from an interator in your data bindings inside a backing bean?
I can come up with a way were i resolve the value of an expression like #{bindings.myAttribute.value}
Is this the best way or is there an easier?
I can also place a hidden inputField were i bind the value to the attribute in my bindings and set the bindings of the input field to my backing so i can just call the .getValue in my backing bean...

Answer 1

Yannick
What is the best way to retreive a value from an interator in your data bindings inside a backing bean? Using JDeveloper 11.1.1.3.0 I created an example application
at http://www.consideringred.com/files/oracle/2010/Thread1665841AttributeValuesApp-v0.01.zip
It illustrates the behaviour for 3 different approaches to get an attribute value in a managed bean:
public class WithAttributeValues
  public int getMyIdFromEL()
    return (Integer)ELHelper.get("#{bindings.myId.inputValue}");
  public int getMyIdFromAttributeBinding()
    BindingContainer vBindingContainer =
       BindingContext.getCurrent().getCurrentBindingsEntry();
    ControlBinding vControlBinding = vBindingContainer.getControlBinding("myId");
    AttributeBinding vAttributeBinding = (AttributeBinding)vControlBinding;
    return (Integer)vAttributeBinding.getInputValue();
  public int getMyIdFromIterator()
    BindingContainer vBindingContainer =
       BindingContext.getCurrent().getCurrentBindingsEntry();
    DCBindingContainer vDCBindingContainer = (DCBindingContainer)vBindingContainer;
    DCIteratorBinding vDCIteratorBinding =
       vDCBindingContainer.findIteratorBinding("findSomeMyRowsIterator");
    Row vRow = vDCIteratorBinding.getCurrentRow();
    return (Integer)vRow.getAttribute("myId");
}For some reason the approach using getMyIdFromIterator() does not behave as intended when navigating the current row.
see screencast at http://www.screencast.com/t/nIJ3DpsNE9Y
Maybe John Stegeman can explain why that is because it is basically the same approach as he suggested in this forum thread.
But if you don't have an attribute binding because you only use the iterator... Is it an option to create an attributeValue and bind it to the iterator so you can use it in your backing bean that way? Based on my findings above, using attributeValues bindings seems to be preferable.
or is it only possible when you realy have an inputField bound to the attributeValue? The example application in Thread1665841AttributeValuesApp-v0.01.zip does not have any af:inputText components.
Your question about "the best way" made me wonder if that wouldn't require JSR 227 API, so I posted that question in another forum thread, "How to get an attribute value using JSR 227 API ?"
at How to get an attribute value using JSR 227 API ?
regards
Jan Vervecken