Assume you have the following scenario:
On Page1.jspx, you have a task flow dropped as a region.
Within that task flow, you have just one fragment, that contains a GoLink
component that points to Page2.jspx. What we need to do is as soon as
Page1.jspx is loaded, we need to redirect to Page2.jspx by programatically
creating the link click (or action) event. We can pass some parameters as well
during this call.
If you are using 11gR2 and up, then you can use the following
tutorial for this requirement:
https://blogs.oracle.com/jdevotnharvest/entry/jdeveloper_11g_r2_and_12c
But if you are using JDeveloper version before 11gR2, then
you have to manually take care as suggested below. Here is how GoLinkView.jsff
looks like:
<?xml version='1.0'
encoding='UTF-8'?>
<jsp:root
xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
xmlns:af="http://xmlns.oracle.com/adf/faces/rich"
xmlns:f="http://java.sun.com/jsf/core">
<af:panelGroupLayout id="pgl1"
layout="vertical">
<af:commandLink text="Second
Link" id="linkToHome"
actionListener="#{GoLinkViewBean.navigateLink}"
clientComponent="true"
partialSubmit="true"
visible="false"/>
</af:panelGroupLayout>
</jsp:root>
And the GoLinkViewBean looks like:
package view.bean;
import
java.io.IOException;
import
javax.faces.context.FacesContext;
import
javax.faces.event.ActionEvent;
public class
GoLinkViewBean {
public GoLinkViewBean() {
}
public void navigateLink(ActionEvent
actionEvent) {
// Add event code here...
String destination = "http://127.0.0.1:7001
/GoLinkRedirectApp-ViewController-context-root/faces/Page2.jspx";
try {
FacesContext.getCurrentInstance().getExternalContext().redirect(destination);
} catch (IOException e) {
e.printStackTrace();
}
}
}
To initiate the navigateLink action event on page load, I
have used javascript solution. The key is to add a clientListener on the
document tag of Page1.jspx as shown below:
<?xml version='1.0'
encoding='UTF-8'?>
<jsp:root
xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
<jsp:directive.page
contentType="text/html;charset=UTF-8"/>
<f:view>
<af:document
title="Page1.jspx" id="d1">
<af:clientListener type="load"
method="onPageLoad"/>
<af:resource type="javascript">
function onPageLoad(){
var button =
AdfPage.PAGE.findComponentByAbsoluteId("r1:0:linkToHome");
AdfActionEvent.queue(button,true);
}
</af:resource>
<af:form id="f1">
<af:region
value="#{bindings.RedirectTaskFlow2.regionModel}"
id="r1"/>
</af:form>
</af:document>
</f:view>
</jsp:root>
So as soon as the Page1.jspx is called, after the page is
loaded, the javascript takes control, find the goLink component in the nested
region and adds the action even in the even queue. Once that is done, the
action event is trigged on the component to redirect the request to Page2.jspx. Please not that if you remove the clientListener tag, the javascript will fail as it will run even before the page is loaded and will not be able to find the component.
Thats all.
