Aleksei, On 7/19/05, Aleksei Valikov <[EMAIL PROTECTED]> wrote: > Hi. > > >>What would be the easiest way to implement this with standard EL, > >>without JS? > > > > Let's assume... > > [skip] > > Thank you, your answer is the most complete of all I've seen in the > thread. I only miss one fragment:
Glad to help. :-) > > > When the commandLink is clicked for a particular row in the table, the > > current row is established in the table data model prior to action > > event delivery. > > Is it possible to set the current row and invoke an action with one command? If you take a quick look at the Javadoc for DataModel at http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/api/javax/faces/model/DataModel.html you'll see there are setRowIndex(int) and Object getRowData() methods. During event delivery, the <h:dataTable> component will automatically establish the right row index on the DataModel before your "loadDocument" action method binding is called, so you don't need to worry about it. :-) Then, inside loadDocument, you can call model.getRowData() to pull out the current row's data object. The problem with using an EL expression to observe the current row data (rather than model.getRowData()) is that you now have a reverse dependency because the loadDocument code and JSP document would have to rendezvous on the name of table var. For example: <h:dataTable var="row" ... > would need to be consistent with public void loadDocument(ActionEvent event) { FacesContext context = FacesContext.getCurrentInstance(); Application application = context.getAppliction(); ValueBinding vb = application.createValueBinding("row"); Object rowData = vb.getValue(context); } whereas the managed-property approach establishes a model-to-model dependency from the "logicBean" managed bean, to the "modelBean" managed bean. The dependency is captured in faces-config.xml metadata, rather than Java code. This allows the table var attribute in the JSP view layer to be modified independently, without impacting the correctness of the managed bean code. Kind Regards, John Fallows.
