Error in page navigation

Question

I have a login page which navigates to the next page ones logged in and i have to validate that only a single user can login i.e, the same username and password is valid. If not an error message is displayed that the login data is not valid. I have done it as below:
if(this.getUserName().getValue()=="abcd" && this.getPassword().getValue()=="1234"){
userName=this.getUserName().getValue().toString();
password=this.getPassword().getValue().toString();
ADFContext.getCurrent().getSessionScope().put("userName",userName);
ADFContext.getCurrent().getSessionScope().put("password",password);
else{
FacesMessage msg = new FacesMessage("Please check your login data");
msg.setSeverity(FacesMessage.SEVERITY_ERROR);
FacesContext.getCurrentInstance().addMessage(null, msg);
But the error message is being displayed in the next page instead of getting displayed in the same login page on hitting the login button. Can any one help me where I am going wrong.? thanks!

Answer 1

i dont know how you perform navigation.
in adfc-config
based some condition you can do that.
<view id="HomePage">
    <page>/HomePage.jspx</page>
  </view>
  <view id="SupplierAppIndex">
    <page>/Index.jspx</page>
  </view>
  <control-flow-rule id="__5">
    <from-activity-id id="__6">HomePage</from-activity-id>
    <control-flow-case id="__7">
      <from-outcome id="__13">success</from-outcome>
      <to-activity-id id="__8">Index</to-activity-id>
    </control-flow-case>
    <control-flow-case id="__14">
      <from-outcome id="__16">error</from-outcome>
      <to-activity-id id="__15">HomePage</to-activity-id>
    </control-flow-case>
  </control-flow-rule>
  <managed-bean id="__1">
    <managed-bean-name id="__3">HomePage</managed-bean-name>
    <managed-bean-class id="__2">com.rits.suplr.view.backing.HomePage</managed-bean-class>
    <managed-bean-scope id="__4">session</managed-bean-scope>
    <!--oracle-jdev-comment:managed-bean-jsp-link:1HomePage.jspx-->
  </managed-bean>
  <managed-bean id="__10">
    <managed-bean-name id="__12">Index</managed-bean-name>
    <managed-bean-class id="__9">com.rits.suplr.view.backing.Index</managed-bean-class>
    <managed-bean-scope id="__11">backingBean</managed-bean-scope>
  </managed-bean>here can see homepage dologin() methods return value "success" means it return index or else stay in homepage.