p:datatable: How to edit data in a p:dialog? - primefaces

Question

Context
I have a datatable with a button that opens a dialog when clicked. That dialog shows additional data (xml content) in a p:inputTextarea
Question
Now I would like to make this p:inputTextarea editable and have the changes reflected in the object of the datatable. I wanted to add a commandbutton in the dialog to save the changes. How do I get a reference to the selected object ?
Xhtml
<h:form id="alltxform">
<p:dataTable id="tablealltx" var="transaction" value="#{transactionListModel.txList}">
<p:column>
<p:commandButton update=":alltxform:xmlDetail" oncomplete="PF('dialog').show()">
<f:setPropertyActionListener value="#{transaction}"
target="#{transactionListModel.selectedTx}" />
</p:commandButton>
</p:column>
</p:dataTable>
<p:dialog header="Detail" widgetVar="dialog">
<p:outputPanel id="xmlDetail">
<p:inputTextarea readonly="false" id="xmlviewer"
value="#{transactionListModel.selectedTx.xml}" />
</p:outputPanel>
</p:dialog>
</h:form>
Model
package model;
#Named
#SessionScoped
public class TransactionListModel implements Serializable {
private static final long serialVersionUID = 1L;
private List<TransactionVO> txList;
private TransactionVO selectedTx;
public TransactionVO getSelectedTx() {
return selectedTx;
}
public void setSelectedTx(TransactionVO selectedTx) {
this.selectedTx = selectedTx;
}
#PostConstruct
public void init() {
txList = new ArrayList<TransactionVO>();
}
public List<TransactionVO> getTxList() {
return txList;
}
public void clearList(){
txList = new ArrayList<TransactionVO>();
}
}
Button
I want to add this button to the dialog.
<p:commandButton value="OK" onclick="PF('dialog').hide();" actionListener=""/>
I read about cellEdit events, but that's not really what I need. I need a reference to my transaction object inside the dialog in order to save the changes.

Answer 1

Do you mean the dialog will look like -
<p:dialog header="Detail" widgetVar="dialog">
<p:outputPanel id="xmlDetail">
<p:inputTextarea readonly="false" id="xmlviewer"
value="#{transactionListModel.selectedTx.xml}" />
<p:commandButton value="OK" onclick="PF('dialog').hide();" actionListener=""/>
</p:outputPanel>
</p:dialog>
And the action will refresh the model, before refreshing the table?
And you want to access TransactionListModel.selectedTx?
Well if its in the model and accessible from the controller then just -
actionListener="#{yourController.yourAction(transactionListModel.selectedTx)}"
And Update the underlying datastructure in the yourAction method, before updating :tablealltx:tablealltx