Navigate to another page on value change event of ADF input component

Recently I have seen a thread on OTN forum in that user want to navigate from one page to another on valueChangeListener of input component.

First Method-
This is a simple piece of code to perform navigation to specific page , Use it in ValueChangeListener directly

 FacesContext facesContext = FacesContext.getCurrentInstance();
 facesContext.getApplication().getNavigationHandler().handleNavigation(facesContext, null, "controlFlowName");

Second Method-
ValueChangeListener fires when value of input component changes but it is not meant for navigation, For navigation we use buttons and links with Action property
But for this requirement we have to be a bit tricky, We can queue button Action on value change listener of inputText to navigate to another page
Now first value change listener will be executed and then it'll queue button action to execute and as final outcome user will be able to navigate

ADF Basics: Get display and base value of POJO based SelectOneChoice

Previously I have posted about populating selectOneChoice programmatically using POJO

Programmatically populate values in a af:selectOneChoice component in ADF

and this post is about getting selected value of POJO base selectOneChoice (both display value and base value)

Get selected slice of dvt:pieChart using custom selection listener in ADF

First of all wishing a very Happy New Year to all of you, New Year is like a blank page , fill it with happiness and good memories

This post is about a simple requirement - How to get selected slice value of dvt:pieChart ?
So for this we have to create a custom selection Listener in managed bean that will be called whenever user selects any slice of pieChart
If you see documentation of pieChart it tells about two properties -

ADF Basics: Using setPropertyListener to set value in memory scope variables

Soemtimes we need to set a value in memory scope variable on some event
In ADF af:setPropertyListener does this for you declaratively

The setPropertyListener tag provides a declarative syntax for assigning values when an event fires. The setPropertyListener implements the listener interface for a variety of events, to indicate which event type it should listen for set the 'type' attribute.

Read more about <af:setPropertyListener>

ADF Basics: How to invoke model layer methods from managed bean (Best Practice to write business logic in ADF)

Again a post about ADF Basics for those who are starting with ADF
This topic is posted multiple times and one of the most asked question on OTN

How to access AM method in bean ?
How to pass parameters to model from managed bean (viewController) ?
How to pass taskFlow parameter to model ?

Or sometimes I have to tell user that you should not access ApplicationModule or not update model from managed bean and then i post a link about this
I often post a link of Frank's blog
Best practice invoking business services methods from JSF beans
It is well explained but still user not able to do because he/she doesn't know about clientInterface, pageDef etc

So i thought to write a step by step implementation of this and if you want to know why it is best to call method through binding layer ?
Then please refer Frank's blog :)

What i am going to explain is How to call a method defined in ApplicationModule Impl class in managed bean ?
So for this first i need to define a method in ApplicationModule Impl class




Here i am using Departments table of HR Schema and i have created a method to create new row in Departments viewObject
See implementation part -

• To create AMImpl class--> Open ApplicationModule in editor--> Goto Java tab--> Click on edit (pencil) icon and check the checkbox to generate class
  
  
  
  
  
  


• Now write your logic and create method here so i have created a method to create department record and this method takes a parameter i;e DepartmentId



    /**
     *Custom Method to create row in departments viewObject
     */
    public void createDepartmentRecord(Integer deptId) {
        ViewObject deptVo = this.getDepartmentsVO1();
        Row newRow=deptVo.createRow();
        newRow.setAttribute("DepartmentId", deptId);
        deptVo.insertRow(newRow);
    }



• Next step is to add this method to client interface so that we can access this , Again open AM in editor -->Go to Java tab--> Click on edit icon of clientInterface--> Shuttle method to selected side





• Now to add this method in pageDef , Open page in editor--> Click on Bindings tab (bottom of editor)--> Click on green plus icon of bindings section--> Select methodAction and click on ok






Now select method name here and click ok





Now you can see this method is added in pageDef





• Now time to call this method in managed bean so for that added a button in page and created actionListener in bean . See the code 



    /**Method to get Binding Container of page
     * @return
     */
    public BindingContainer getBindings(){
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    }

    /**Calling method defined in AMImpl class to create new Department
     * @param actionEvent
     */
    public void callAMMethodToCreateDepartmentAction(ActionEvent actionEvent) {
        //Get OperationBinding of method
        OperationBinding ob=getBindings().getOperationBinding("createDepartmentRecord");
        //Passing parameter to method -Get parameter map and use paramater name as key
        ob.getParamsMap().put("deptId", 9999);
        //Execute this method
        ob.execute();
        //Check for errors
        if(ob.getErrors().isEmpty()){
            // Successfully Executed
        }
    }



• Now run application and check , is it working ? ;)

On click a new row is inserted in table with DepartmentId 9999

All done :)
In same way you can call method defined in any model implementation class, remember don't access ApplicationModule or viewObject directly , make use binding layer

and again why it is best practice ?? to know this read Frank's blog :)

Cheers :) Happy Learning 

Working with af:iterator and af:forEach programmatically (Add and delete records using List)

In previous post Working with af:iterator and af:forEach programmatically (Populate values using POJO from Managed Bean) we saw that how can we populate record from a List to af:iterator and af:forEach (ADF Faces Component)

So this post is about adding and deleting of records from List while List is presented using af:iterator.
here i am extending previous post and using same sample application



Added two fields and button on page to add records 

<af:panelFormLayout id="pfl1" rows="1">
                    <af:inputText label="Name" id="it1" binding="#{viewScope.PopulateIteratorBean.nameBind}"/>
                    <af:inputText label="Department" id="it2" binding="#{viewScope.PopulateIteratorBean.deptNameBind}"/>
                    <af:button text="Add" id="b1"
                               actionListener="#{viewScope.PopulateIteratorBean.addNewRecordAction}"/>
                </af:panelFormLayout>

and on this button action simply added both attributes to List and added partial trigger of button to af:iterator to refresh it

    // Component binding to access inputValue from page
    
    private RichInputText nameBind;
    private RichInputText deptNameBind;
    
    public void setNameBind(RichInputText nameBind) {
        this.nameBind = nameBind;
    }

    public RichInputText getNameBind() {
        return nameBind;
    }

    public void setDeptNameBind(RichInputText deptNameBind) {
        this.deptNameBind = deptNameBind;
    }

    public RichInputText getDeptNameBind() {
        return deptNameBind;
    }

    /**Method to add record in List and show on page using af:iterator and af:forEach
     * @param actionEvent
     */
    public void addNewRecordAction(ActionEvent actionEvent) {
        if (nameBind.getValue() != null && deptNameBind.getValue() != null) {
            EmployeeDet obj = new EmployeeDet(nameBind.getValue().toString(), deptNameBind.getValue().toString());
            employeeDetail.add(obj);
            
        }
    }

On page - add a new record (record added in List and appeared in iterator as well)

So it is quite simple to add records but deletion of record is a bit tricky but not difficult at all :)
Let's see this-
For deleting record i have added a delete link inside iterator so that it should appear for each record as you can see in snap (above)
Here question is that how to know that which record should be deleted  ?

So for this i have added a f:attribute tag to link , this attribute contains the value of current item of iterator

f:attribute derives it's value from var of af:iterator/af:forEach, this var represents each item of List
Now on delete button's action - get the current item and remove it from List

    /**Method to delete selected record
     * @param actionEvent
     */
    public void deleteRecordAction(ActionEvent actionEvent) {
        //Get value from f:attribute (current item)
       Object itemVal= actionEvent.getComponent().getAttributes().get("itemVal");
       //Remove selected item from List
       employeeDetail.remove(itemVal);
    }

After deleting records

Sample ADF Application- Download

Working with af:iterator and af:forEach programmatically (Populate values using POJO from Managed Bean)

This is another post about Working programmatically with ADF (populating af:iterator and af:forEach programmatically )

Previously i have posted about populating af:iterator and af:forEach using ADF BC and binding layer to show master-detail relation
Implementing master/detail tree relation using af:Iterator and af:forEach for better UI designs - Oracle ADF

For this post i am populating employee name and it's department name using List datastructure ,to get and set value of attributes

Created a java bean class , it has 2 variable for both attributes

public class EmployeeDet {
    public EmployeeDet(String name, String deptName) {
        this.name = name;
        this.deptName = deptName;
    }
    //Attribute to display EmployeeName and Department Name
    private String name;
    private String deptName;

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setDeptName(String deptName) {
        this.deptName = deptName;
    }

    public String getDeptName() {
        return deptName;
    }
}

Next step is to create a managed bean to populate data in af:iterator and af:forEach , this managed bean makes use of

EmployeeDet 

java bean class to add data in same format for all items of iterator and forEach. A List data structure is used to pass all values to iterator. See code of managed bean 

    //Constructor-populate default records
    public PopulateIteratorBean() {

        EmployeeDet obj = new EmployeeDet("Ashish Awasthi", "Oracle ADF");
        employeeDetail.add(obj);
        obj = new EmployeeDet("Alex Smith", "Java");
        employeeDetail.add(obj);
        obj = new EmployeeDet("James S", "PHP");
        employeeDetail.add(obj);
    }
    //ArrayList to poplate data in af:iterator and af:forEach
    private List<EmployeeDet> employeeDetail = new ArrayList();

    public void setEmployeeDetail(List<EmployeeDet> employeeDetail) {
        this.employeeDetail = employeeDetail;
    }

    public List<EmployeeDet> getEmployeeDetail() {

        return employeeDetail;
    }

Now drop af:iterator on page and set it's properties like value, var etc

using var reference of iterator , set value in output text to show Employee Name and DepartmentName , see XML source of af:iterator

<af:panelGroupLayout id="pgl1" layout="horizontal">
                        <af:iterator id="i1" value="#{viewScope.PopulateIteratorBean.employeeDetail}" var="item">
                            <af:panelBox id="pb2" showDisclosure="false">
                                <f:facet name="toolbar"/>
                                <af:panelGroupLayout id="pgl3" layout="horizontal">
                                    <af:outputText value="#{item.name}" id="ot1"
                                                   inlineStyle="font-weight:bold; font-size:medium; color:#0572ce;;"/>
                                    <af:spacer width="2" height="0" id="s1"/>
                                    <af:outputText value="(#{item.deptName})" id="ot2"
                                                   inlineStyle="font-weight:bold;font-size:small;color:red;"/>
                                </af:panelGroupLayout>
                            </af:panelBox>
                        </af:iterator>
                    </af:panelGroupLayout>  

on running it looks like this-

do same for af:forEach

<af:panelGroupLayout id="pgl2" layout="horizontal">
                        <af:forEach items="#{viewScope.PopulateIteratorBean.employeeDetail}" var="feach">
                            <af:showDetailHeader text="#{feach.deptName}" disclosed="true" id="sdh1">
                                <af:outputText value="#{feach.name}" id="ot3"
                                               inlineStyle="font-weight:bold; font-size:medium; color:#0572ce;;"/>
                            </af:showDetailHeader>
                        </af:forEach>
                    </af:panelGroupLayout>

on running it looks like this-

 Sample ADF Application-Download
Thanks, Happy Learning :)

Programmatically populate values in ADF Faces multiSelect component (af:selectManyCheckbox, af:selectManyChoice, af:selectManyListbox, af:selectManyShuttle)

ADF Faces provides some component to support multiple selection as af:selectManyListbox, af:selectManyCheckbox, af:selectManyChoice, af:selectManyShuttle
In this post we will see how to populate values in these component from managed bean using POJO
You can read my previous post on multiple selection that was about populating multiselect component using ADF BC and binding layer
Using Multiple Selection (selectManyListbox & selectManyCheckbox component) in ADF
Shuttle Component in Oracle ADF (Allow Multiple Selection)

See the step by step implementation-

• Create a Fusion Web Application and a managed bean in viewController
  
  
  


• Create a variable of type java.util.List in managed bean, and generate its accessors



    //List to show records in selectMany components
    List<SelectItem> allValuesList;

    public void setAllValuesList(List<SelectItem> allValuesList) {
        this.allValuesList = allValuesList;
    }

    public List<SelectItem> getAllValuesList() {
        return allValuesList;
    }



• This list contains value of type javax.faces.model.SelectItem; that is supported by af:selectManyCheckbox, af:selectManyChoice, af:selectManyListbox compoent



    //List to show records in selectMany components
    List<SelectItem> allValuesList;

    public void setAllValuesList(List<SelectItem> allValuesList) {
        this.allValuesList = allValuesList;
    }

    public List<SelectItem> getAllValuesList() {
        if (allValuesList == null) {
            allValuesList = new ArrayList<SelectItem>();
            allValuesList.add(new SelectItem(1, "India"));
            allValuesList.add(new SelectItem(2, "Australia"));
            allValuesList.add(new SelectItem(3, "America"));
            allValuesList.add(new SelectItem(4, "United Kingdom"));
        }
        return allValuesList;
    }



• See how to add this list reference to  af:selectManyCheckbox component, just drag n drop component on page





• Set managed bean list reference to selectManyCheckbox component, records stored in this list will be populated in component





• Suppose I have to show some record as selected by default on page load so for this requirement created another List in managed bean and added it to value property of selectManyCheckbox component
  Value property of component refers only selected records but selectItems component refers all records of component



    //List to show selected values in selectMany Component
    List selectedValues;

    public void setSelectedValues(List selectedValues) {
        this.selectedValues = selectedValues;
    }

    public List getSelectedValues() {
        if (selectedValues == null) {
            selectedValues = new ArrayList();
            selectedValues.add(1);
            selectedValues.add(3);
            System.out.println("List is-" + selectedValues);
        }
        return selectedValues;
    }


See af:selectManyCheckbox source -



<af:selectManyCheckbox id="smc1" value="#{viewScope.ProgSelectManyComp.selectedValues}">
                                    <f:selectItems value="#{viewScope.ProgSelectManyComp.allValuesList}" id="si1"/>
                                </af:selectManyCheckbox>



• Now run this application and see component on page





• Following same steps i have three more component on page , all 3 adf faces component support multiple selection
  af:selectManyChoice-
  
  

  <af:selectManyChoice label="Label 1" id="smc2"
                                                       value="#{viewScope.ProgSelectManyComp.selectedValues}"
                                                       simple="true">
                                      <f:selectItems value="#{viewScope.ProgSelectManyComp.allValuesList}" id="si2"/>
                                  </af:selectManyChoice>
  

  
  
  af:selectManyListbox-
  
  

  <af:selectManyListbox label="Label 1" id="sml1"
                                                        value="#{viewScope.ProgSelectManyComp.selectedValues}"
                                                        simple="true">
                                      <f:selectItems value="#{viewScope.ProgSelectManyComp.allValuesList}" id="si3"/>
                                  </af:selectManyListbox>
  

  
  
  af:selectManyShuttle-
  
  

   <af:selectManyShuttle label="Label 1" id="sos1" simple="true"
                                                         value="#{viewScope.ProgSelectManyComp.selectedValues}"
                                                         contentStyle="width:50px;">
                                      <f:selectItems value="#{viewScope.ProgSelectManyComp.allValuesList}" id="si4"/>
                                  </af:selectManyShuttle>
  



• All 4 components on page are populated using same List, this is just an example to show that all 4 components share same strucutre, run this application and see 




Thanks, Happy Learning :)
Download- Sample ADF Application

Populate af:table programmatically from managead bean using POJO

This post is about a common question
How can we populate an af:table programmatically ?

It means that data in af:table is not populated through model layer (Using ViewObject) using binding layer. lets say I have some values in our managed bean and have to show records in tabular format on page

So what we have to do -

• First you should know the number and data type of columns in table, suppose i have to populate a table for person details (name, mobile number and salary). to get and set value of columns i have created a java bean class , it has 3 variable for 3 columns





// Java Class to set and get value for table column
public class PersonBean {

    public PersonBean(String name, String moNo, Integer salary) {
        this.Name = name;
        this.mobNo = moNo;
        this.salary = salary;
    }
    private String Name;
    private String mobNo;
    private Integer salary;

    public void setName(String Name) {
        this.Name = Name;
    }

    public String getName() {
        return Name;
    }

    public void setMobNo(String mobNo) {
        this.mobNo = mobNo;
    }

    public String getMobNo() {
        return mobNo;
    }

    public void setSalary(Integer salary) {
        this.salary = salary;
    }

    public Integer getSalary() {
        return salary;
    }
}



• Next step is to create a managed bean for referencing af:table , this managed bean makes use of person java bean class to add data in same format for all table rows. A List data structure is used to pass all values in af:table. See code of managed bean 



//ArrayList to poplate data in af:table
    List<PersonBean> personList = new ArrayList();

    //To Populate default row in table (Code in Constructor)

    public ProgTableBean() {
        personList.add(new PersonBean("Ashish Awasthi", "xxxxxxxxxx", 50000));
    }

    public void setPersonList(List<PersonBean> personList) {
        this.personList = personList;
    }

    public List<PersonBean> getPersonList() {
        return personList;
    }



• Now just drop an af:table on page and set it's properties like value, column header and text values in columns



 As i have to show only 3 columns so deleted extra ones



 Set properties -
 value- from where table collection is populated
 columns values- take the var reference of table and refer variable name in List (here 'row' is table var and second is variable name in person bean class)




 See the XML source of af:table-



<af:table var="row" rowBandingInterval="1" id="t1" value="#{viewScope.ProgTableBean.personList}"
                          partialTriggers="::b1">
                    <af:column sortable="false" headerText="Name" id="c1" width="150">
                        <af:outputText value="#{row.name}" id="ot1"/>
                    </af:column>
                    <af:column sortable="false" headerText="Mobile Number" id="c2">
                        <af:outputText value="#{row.mobNo}" id="ot2"/>
                    </af:column>
                    <af:column sortable="false" headerText="Salary" id="c3" align="right">
                        <af:outputText value="#{row.salary}" id="ot3"/>
                    </af:column>
                </af:table>



• Now run this application and see there will be one row in table as code is added in constructor of managed to populate one row





• I have added a form and button in page to add new records in table , see the form source code



<af:panelFormLayout id="pfl1">
                    <f:facet name="footer"/>
                    <af:inputText label="Name :" id="it1" binding="#{viewScope.ProgTableBean.nameBind}"/>
                    <af:inputText label="Mobile Number :" id="it2" binding="#{viewScope.ProgTableBean.mobNumBind}"/>
                    <af:inputText label="Salary :" id="it3" binding="#{viewScope.ProgTableBean.salaryBind}">
                        <af:convertNumber/>
                    </af:inputText>
                    <af:button text="Add Record" id="b1" actionListener="#{viewScope.ProgTableBean.addNewRcord}"/>
                </af:panelFormLayout> 


Code in managed bean for button action-

    /**Method to add new record in table
     * @param actionEvent
     */
    public void addNewRcord(ActionEvent actionEvent) {
        //Get all values using compoenet binding as mobNumBind
        if (mobNumBind.getValue() != null && nameBind.getValue() != null &&
            salaryBind.getValue() !=
            null) {
            // Add new Record in List
            personList.add(new PersonBean(nameBind.getValue().toString(), mobNumBind.getValue().toString(),
                                          Integer.parseInt(salaryBind.getValue().toString())));
        }
    }



• now run and check application- 

 More posts on POJO Based table -

Get selected row (single/multiple) from POJO based table in ADF
Apply sorting to POJO based af:table programmatically , Using custom sort listener in ADF

Thanks , Happy Learning :)
Download-Sample ADF Application

Create taskFlow and region binding at run-time , show n numbers of regions using multiTaskFlow- Oracle ADF

This is very specific development requirement to create taskFlow and region binding at run-time to show n numbers of region in page
In this case initially you don't know how much regions required in page as it depends on user activity .

you can see in http://irctc.co.in/ (Indian Railways) site
when user search for a train and check berth availability then a tab is generated at run-time with berth and fare details and it continues for each action , every time a new tab with new information is generated (n- number of tab and taskFlow)

A very good article is published in Oracle Magazine (July – August 2014) by Frank Nimphius on this requirement , article contains very good description of each and every step and a sample application with whole functionality
I found it very interesting and good so giving a quick overview of TaskFlow on Fly

this functionality is implemented using multiTaskFlow element that uses taskFlow binding from managed bean , taskFlow bindings in managed bean created using TaskFlowBindingAttributes
this class is used to set all properties of taskFlow binding at runtime



See Oracle docs (TaskFlowBindingAttributes)-
Set of attributes that define a TaskFlowBinding object. The taskFlowList attribute of the multiTaskFlow element of the page definition uses a list of object of this type to describe each taskflowBinding that the multiTaskflow binding contains. The order of this list defines the order of the region objects in the multiTaskflow binding. 

So in this post i am using Departments and Employees table of HR Schema(Oracle) to create business components for Model part

Create viewCriteria in both viewObjects (Departments and Employees) to filter data using DepartmentId

Applied viewCriteria to viewObject at AM level (Edit Vo instance and shuttle viewCriteria to selected side)
After this created methods in AMImpl class to set value in both viewCriteria's bind variables

    /**Method to filter Department ViewObject
     * @param deptId
     */
    public void filterDepartmentData(Integer deptId) {
        this.getDepartments1().setNamedWhereClauseParam("BindDeptId", deptId);
        this.getDepartments1().executeQuery();

    }

    /**Method to filter Employees Data
     * @param deptId
     */
    public void filterEmployeesData(Integer deptId) {
        this.getEmployees1().setNamedWhereClauseParam("BindDeptId", deptId);
        this.getEmployees1().executeQuery();

    }

Expose both methods to use in clientInterface

Now viewController part-

Created two bounded taskFlow with one input parameter for DepartmentId (this id will be used to filter Departments and Employess viewObject)
One for Departments and Second for Employees-

First taskFlow has a .jsff (facelets) page that has Departments viewObject as a form , just to show date with navigation buttons

filterDepartmentData method of AMImpl is used as Default Activity of this taskFlow

to filter data before entering in page

Second taskFlow has a .jsff (facelets) page that has Employees viewObject as a table

filterEmployeesData method of AMImpl is used as Default Activity of this taskFlow

to filter data before entering in page

Now basic configuration is complete, model is ready and bounded taskFlows are ready
then create a jsf page and manged bean (pageFlowScope) in adfc-config.xml, this page will make use of these two bounded taskFlows  and managed bean is responsible to generate taskFlow binding at runtime

Next Step is to prepare manged bean to hold taskFlowBinding-
Create a List of type TaskFlowBindingAttributes and it's accessors

import oracle.adf.controller.binding.TaskFlowBindingAttributes;    
private List<TaskFlowBindingAttributes> taskFlowBinding = new ArrayList<TaskFlowBindingAttributes>(5);

    public void setTaskFlowBinding(List<TaskFlowBindingAttributes> taskFlowBinding) {
        this.taskFlowBinding = taskFlowBinding;
    }

    public List<TaskFlowBindingAttributes> getTaskFlowBinding() {
        return taskFlowBinding;
    }

Create multiTaskFlow binding in executables of pgae-

• Open jsf page, click on bindings tab of page editor
• click on green plus icon of executables section
• Select ADF TaskFlow Bindings in category and select multiTaskFlow





• click on ok and provide an unique value for id attribute and reference of List created in managed bean as value for taskFlowList attribute





• Configuration of  multiTaskFlow for this page is complete and now time to design page to render multiple regions. For this purpose add af:ForEach and a region inside it, forEach is responsible to add regions at run-time. here a little change i am using panelTabbed  to create tab at runtime and inside tab there will be region 
• See this xml code- here nothing simple panelTabbed and forEach iterates over to list to identify number of items and varStatus of forEach is used to create id of showDetailItem at runtime as id must be unique. regionModel is referenced from var attributes of forEach as part of taskFlowBinding 



 <af:panelTabbed position="above" id="pt1" partialTriggers="b1">
            <af:forEach items="#{bindings.mtf1.taskFlowBindingList}" var="multiTF" varStatus="vs">
               <af:showDetailItem id="Tab#{vs.index+1}" text="#{multiTF.name}" partialTriggers="b1">
                  <af:region value="#{multiTF.regionModel}" id="r1#{vs.index}" partialTriggers="::b1"/>
               </af:showDetailItem>
            </af:forEach>
         </af:panelTabbed>



• Now page is ready to show unknown (n) number of regions, here i am using two list and a button on page First List is of all departments and second one is static list to select information type (if user want to see Only Departments or Departments Wise Employees) and button to execute and add taskFlow from managed bean as per selected Department and 
• Again a map is created in managed bean to store input parameters for taskFlow and it will used while setting and creating taskFlowBinding



    HashMap<String, Object> tfParam = new HashMap<String, Object>();
    public void setTfParam(HashMap<String, Object> tfParam) {
        this.tfParam = tfParam;
    }

    public HashMap<String, Object> getTfParam() {
        return tfParam;
    }



• finally we will create taskFlow binding and set properties on button click (actionEvent of button), See this code-



    /**Method to create and set properties in TaskFlowBinding
     * @param actionEvent
     */
    public void displayDepartmentAction(ActionEvent actionEvent) {
        //Clear List to show newly created regions only
        taskFlowBinding.clear();
        System.out.println("List Cleared -Size>" + taskFlowBinding.size());
        //Check that user selects value in both List (Uses component binding to check)
        if (deptIdBindVal.getValue() != null && showTypeBind.getValue() != null) {
            //Put value in TaskFLow Parameter map, deptIdBindVal is binding of list of departments on page
            tfParam.put("DeptIdParam", deptIdBindVal.getValue());

            //Only Shows Departments taskFlow, if user selectes "Only Departments"
            if ("Only Departments".equalsIgnoreCase(showTypeBind.getValue().toString())) {
                //Setting taskFlow properties
                TaskFlowBindingAttributes tfAttr = new TaskFlowBindingAttributes();
                //Creating Unique Id
                tfAttr.setId("Department_" + deptIdBindVal.getValue());
                //See bounded taskFlow name in WEB-INF and use here
                tfAttr.setTaskFlowId(new TaskFlowId("/WEB-INF/DepartmentsBTF.xml", "DepartmentsBTF"));
                //This EL refers parameter map created in this managedBean
                tfAttr.setParametersMap("#{pageFlowScope.MultiTaskFlowBean.tfParam}");
                //Finally add taskFlow to List
                taskFlowBinding.add(tfAttr);
            } else { // Show both Departments and Employees
                //Creating Departments TaskFlow binding
                TaskFlowBindingAttributes tfAttr = new TaskFlowBindingAttributes();
                tfAttr.setId("Department_" + deptIdBindVal.getValue());
                tfAttr.setTaskFlowId(new TaskFlowId("/WEB-INF/DepartmentsBTF.xml", "DepartmentsBTF"));
                tfAttr.setParametersMap("#{pageFlowScope.MultiTaskFlowBean.tfParam}");
                taskFlowBinding.add(tfAttr);
                //Creating Employee TaskFlow biniding
                tfAttr = new TaskFlowBindingAttributes();
                tfAttr.setId("Employees_" + deptIdBindVal.getValue());
                tfAttr.setTaskFlowId(new TaskFlowId("/WEB-INF/EmployeesBTF.xml", "EmployeesBTF"));
                tfAttr.setParametersMap("#{pageFlowScope.MultiTaskFlowBean.tfParam}");
                taskFlowBinding.add(tfAttr);
            }
        }
    }



• So Application with multiTaskFlow is ready , in this post i have used these two bounded taskFlow to show in two tabs at run-time, in same way you can call multiple TFs or a single taskFlow multiple time. Now runt application and see how it works

Initial page with two lists

Select Department and show type -click on button

Select Department and show type -click on button

• Refer this post Region Extreme: Multi-Task-Flow Binding to learn more about multiTaskFlow binding. In this Frank also told about how to use dynamic viewObject instance to show different data at run-time, because if we use same instance of viewObject in multiple taskFlow at same time then it will not maintain state for each region to it is necessary to use dynamic instance and it's binding in pageDef
• Read more about regions and taskFlows- Using Task Flows as Regions

Thanks - Happy Learning :) Sample ADF Application