Set the Focus in ADF

Focus.java

package nl.whitehorses.adf.demo.beans;
 
import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.el.ValueExpression;
 
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
 
import oracle.adf.controller.TaskFlowId;
import oracle.adf.share.ADFContext;
 
import org.apache.myfaces.trinidad.render.ExtendedRenderKitService;
import org.apache.myfaces.trinidad.util.Service;
 
public class Focus {
 
    // to make this work the UIComponent must have clientComponent="true"
    public String getFocus() {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        String clientId    = null;
 
        // only for the secondPage, this page contains no dynamic regions
        if ("/secondView".equals(facesContext.getViewRoot().getViewId())){
         clientId = "r1:0:it3";
        }
 
        // only for the startPage
        if ("/startView".equals(facesContext.getViewRoot().getViewId())){
 
          // what is the current Task Flow
          TaskFlowId taskFlow = 
              (TaskFlowId)this.getExpression("DynamicRegion.dynamicTaskFlowId");
 
          // in the region we need to find the component
          UIComponent region = facesContext.getViewRoot().findComponent("r1");
          UIComponent focus  = null;
 
          // department TF
          if ( "/WEB-INF/department.xml#department".equals(taskFlow.getFullyQualifiedName()) ){
 
            // find the Focus UIComponent in the department TF 
            // and get its clientId
            focus  = region.findComponent("it1");  
 
          // employee TF  
          } else if ( "/WEB-INF/employee.xml#employee".equals(taskFlow.getFullyQualifiedName())) {
 
            // find the Focus UIComponent in the employee TF 
            // and get its clientId
            focus  = region.findComponent("it3");
 
          }
          if ( focus != null ) {
            // found so use javascript to set the focus
            clientId = focus.getClientId(facesContext);
            ExtendedRenderKitService service = 
                Service.getRenderKitService(facesContext,
                                            ExtendedRenderKitService.class);
            service.addScript(facesContext,
                 " var b = AdfPage.PAGE.findComponent('"+clientId+"'); b.focus();"
                 );
          } else {
            // nothing found then set the startPage focus  
            clientId = null;
          }
           
          // nothing found then set the startPage focus, this 
          // can be handled without javascript
          if ( clientId == null )
            clientId = "it2";
          System.out.println(new java.util.Date()+" focus on "+clientId);
        }
        return clientId;
    }
 
    private Object getExpression(String param) {
        ADFContext adfCtx = ADFContext.getCurrent();
        ELContext elContext2 = adfCtx.getELContext();
        ExpressionFactory elFactory2 = adfCtx.getExpressionFactory();
        ValueExpression valueExp2 = 
            elFactory2.createValueExpression(elContext2,
                                             "#{"+param+"}",Object.class);
        return valueExp2.getValue(elContext2);
    }
 
}