Dynamic Region taskflow with department / employee tree

In JDeveloper 11G is possible to create dynamic region so you can re-use code and save space on your page. This blog explains how to use it with an adf tree on departments and employees. For example if I click in the tree on a department then the departments region is shown and refreshed with the selected department. The same if I click on an employee.



In this example I use a bounded taskflow for employee and one for departmens. How to make this you can see my earlier blog.

Let's drop the department view from the data control and make a adf tree. We also put in the emploview and make sure you select the deptno and empno


Now we can drop a dymamic region by dragging the department task flow on the page. You now got an option to create a dynamic region and jdeveloper gives the option to create a bean. Let's do that. I moved the session backing bean definition to faces-config.xml. Update the backing bean with a key variable and two methods to select the right bounded taskflow region.

public class DepartmentDynamicBean {
    private String taskFlowId = "/WEB-INF/task-flow-definition.xml#task-flow-definition";

    public DepartmentDynamicBean() {
    }

    public TaskFlowId getDynamicTaskFlowId() {
        return TaskFlowId.parse(taskFlowId);
    }
    
    public String empRegionLayout() {
        // Add event code here...
        taskFlowId = "/WEB-INF/task-flow-definition.xml#task-flow-definition";
        return null;
    }

    public String deptRegionLayout() {
        // Add event code here...
        taskFlowId = "/WEB-INF/task-flow-definition1.xml#task-flow-definition1";
        return null;
    }
  
}

Now we can update the adf tree with a switcher so we can put in the right value in the key variable of the bean and call the right method.
<br /> <af:panelGroupLayout layout="vertical"><br /> <af:commandButton text="train" action="create"/><br /> <af:tree value="#{bindings.DeptView1.treeModel}" var="node"><br /> <f:facet name="nodeStamp"><br /> <af:switcher facetName="#{node.hierType.viewDefName}"><br /> <f:facet name="nl.ordina.model.DeptView"><br /> <af:commandLink text="#{node}"<br /> action="#{Dept.deptRegionLayout}"><br /> <af:setActionListener from="#{node.Deptno}"<br /> to="#{Dept.keyNo}"/><br /> </af:commandLink><br /> </f:facet><br /> <f:facet name="nl.ordina.model.EmpView"><br /> <af:commandLink text="#{node}"<br /> action="#{Dept.empRegionLayout}"><br /> <af:setActionListener from="#{node.Empno}"<br /> to="#{Dept.keyNo}"/><br /> </af:commandLink><br /> </f:facet><br /> </af:switcher><br /> </f:facet><br /> </af:tree><br /> </af:panelGroupLayout><br />
The last step is to give the key variable value to the dynamic region so the region can refresh it self with the wanted department of employee.
<br /> <taskFlow id="dynamicRegion1"<br /> taskFlowId="${Dept.dynamicTaskFlowId}"<br /> xmlns="http://xmlns.oracle.com/adf/controller/binding"<br /> Refresh="always" RefreshCondition="#{true}"><br /> <parameters><br /> <parameter xmlns="http://xmlns.oracle.com/adfm/uimodel" id="param1"<br /> value="#{Dept.keyNo}"/><br /> </parameters><br /> </taskFlow><br />
and we are finished