Hi David
Thanks for quick response. 
Here is my code snippet 

<h:dataTable id="deviceDetailTable" styleClass="list" rowClasses="odd,even" 

value="#{updateDeviceBean.tableRows}" var="vartableRow" 

style="">


<h:column id="column1" style="">

<f:facet name="header"><h:outputText value="Id"/></f:facet>

<h:commandLink action="#{updateDeviceBean.loadDeviceInterfaceDetails}"
value="#{vartableRow.viewId}">

<f:param name="interfaceId" value="#{vartableRow.viewId}"/> 

</h:commandLink> 

</h:column>

....

....

</h:dataTable> 



In getTableRows() method i am using pojo to render the content inside
<h:dataTable> as follows



public List doGetTableRows() {


tableRows.add(

new DeviceDetail(

devInterface.getId(), //devInterface.getId() - returns an Object & is
rendered as hyperlink

devInterface.getMac(),

devInterface.getIp(),devInterface.getHostName()

)

);


return tableRows;

}



I understand <f:param> is used only to pass Strings & not Objects. So
<t:updateActionListener ... />  is the solution to pass objects



Regards

Bansi



David Delbecq-2 wrote:
> 
> Not sur what you want, trying to answere anyway.
> 
> 1) If you wanna put information on an HyperLink and have it set to a 
> bean property, one way is to use a lifeCycle listener. At the begin of 
> life cycle,  this listener would look for a series of hardcoded url 
> parameters (like "deviceView") and map the to hardCoded value 
> (#{sessionBean.deviceView}). Note that url parameter must be String, if 
> you want to set complex objects like this, you will have to be able to 
> write them to string and convert them from string.
> 
> 2) If you wanna set an object as a parameter using f:param, be aware 
> that f:param works only for h:commandLink, and not for h:commandButton
> 
> Regards,
> David Delbecq
> bansi a écrit :
>> On click of hyperlink i wanna pass the object instance i.e. address of
>> the
>> object
>> FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("viewId")
>>
>> Please note viewId is instance of my object like DeviceView viewId;
>>
>> I am checking the value at every stage & it holds the address of an
>> object
>> until i click the link which goes to backing bean method where the value
>> is
>> null
>>
>> Any pointers/suggestion highly appreciated
>>   
> 
> 

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