open detail view with request parameter

<h:outputLink value="reqscope.faces">
		<f:param name="id" value="#{row.id}" />
		<h:outputText value="link" />
	</h:outputLink>

<f:view>
	id= <h:outputText value="#{param['id']}" />
	<br />
	id= <h:outputText value="#{lookupBean.id}" />
</f:view>

public class LookupBean implements Serializable {

    public String getId() {
    	FacesContext context = FacesContext.getCurrentInstance();
    	ExternalContext extContext = context.getExternalContext();
    	Map<String, String> params = extContext.getRequestParameterMap();
    	return params.get("id");
    }

}

<managed-bean>
	<managed-bean-name>lookupBean</managed-bean-name>
	<managed-bean-class>reqscope.LookupBean</managed-bean-class>
	<managed-bean-scope>request</managed-bean-scope>
</managed-bean>

<a4j:commandLink action="#{detailviewBean.setDetailID(entity.someid)}" value="#{entity.someid}" oncomplete="document.location='/app/detailview.seam'"/>

<h:commandLink action="#{reqscope.faces}">
    <h:outputText value="link"/>
    <f:setPropertyActionListener
        value="#{id}"
        target="#{lookupBean.id}"/>
</h:commandLink>