Get selected row (single/multiple) from POJO based table in ADF

Previously i have posted about populating af:table from managed bean using POJO and adding records in it, Check this-
Populate af:table programmatically from managead bean using POJO 
In this post i am extending previous post application
This post is about getting selected row from POJO based table , It is a common requirement while using af:table based on POJO

Get single row using custom selection listener-

SelectionListener  handles selection event of table , whenever user selects a row in table ,selection listener is fired
Set table RowSelection property to single (to select one row at a time) or multiple (to select multiple row ) and create a custom selection listener in managed bean that will handle table's selection event

See selection listener code in managed bean we can get selected row  using this -

import oracle.adf.view.rich.component.rich.data.RichTable;
import org.apache.myfaces.trinidad.event.SelectionEvent;

 /**Method to get selected row(single)
     * @param selectionEvent
     */
    public void tableSelection(SelectionEvent selectionEvent) {
        //Get table from selectionEvent
        RichTable richTable = (RichTable) selectionEvent.getSource();
        //Cast to the List that populates table
        PersonBean row = (PersonBean) richTable.getSelectedRowData();
        //Get the attributes (column) from list
        System.out.println(row.getName());
    }

Now check this -

 Output on console :)

Get single/multiple selected row on a button click (ActionEvent)-

Set table RowSelection to multiple and select multiple row using Ctrl key of your keyboard
and check this code to get multiple selected row using RowKeySet, We can get all row using getSelectedRowKeys method

import org.apache.myfaces.trinidad.model.RowKeySet;
import java.util.Iterator;    



/**Method to get all selected record in af:table
     * @param actionEvent
     */
    public void getSelectedRecord(ActionEvent actionEvent) {
        //getTableBind is binding of table on page.
        RowKeySet selectedEmps = getTableBind().getSelectedRowKeys();
        //Create iterator from RowKeySet
        Iterator selectedEmpIter = selectedEmps.iterator();

        while (selectedEmpIter.hasNext()) {
            String i = selectedEmpIter.next().toString();
            //personList is the list used to populate table and name is a column of table
            //So here filter list using index and get values then
            PersonBean rowIter = personList.get(Integer.parseInt(i));
            System.out.println(rowIter.getName());
        }
       
    }

Now run and check again -

 Output on console :)

Sample ADF Application- Download
Cheers :) Happy Learning

Blocking row navigation in af:table , synchronize row selection with model in case of validation failure- Oracle ADF

In ADF we often work on editable af:table and when we use af:table to insert ,update or delete data, it is normal to use some validation
but problem is when some validation failure occurs on page (in af:table) ,still we can select another row and it shows as currently selected Row
this is a bit confusing for user as Row Selection of af:table is not synchronized with model or binding layer

See Problem- 

• I have an editable table on page





• Added a validation to check negative value in field of LocationId, now navigate to another row





• See selected focus is on Academic, but problem is when there is validation failure, why it is showing other row as selected ? 




• If you check in ViewObject , you will find that row with DepartmentName Human Resource is current row

ADF framework provides a property in af:table to control navigation in af:table when there is some error or validation failure- blockRowNavigationOnError
See in oracle docs about this proprty-

Valid Values: always, never, auto


Whether we want to block row navigation in case of validation failure.
This is when you select a row and do some editing inside the table or in a related form, and this editing causes some validation failures. At this time, if you click on a different row in table, we want to block you from moving to the new row.
possible values are: always, never and auto. default value is auto.

• always means we block the row navigation
• never means we don't block and let the row navigation happen
• auto means the framework will make the decision

by default in af:tabel it's value is <auto>

Change it to <always> and now see behavior on page

 now if you try to select another row, it is not get selected and selected focus is on row with validation

Sample ADF Application-Download
Cheers - Happy Learning :-)

Identifying Modified/newely added row in af:table, get all modified rows of viewobject in bean

Hello All,
first of all, a very Happy new year to everyone, learn more and more ADF

this tutorial is about a requirement of showing modified rows on page
Suppose if there is lot of data in af:table and user is modifying some rows then it must reflected immediately on page that which rows are modified for more clarity

Andrejus has also posted about it in 2010
http://andrejusb.blogspot.in/2010/04/changed-row-highlighting-in-oracle-adf.html

But this post talks about two requirements-

1. Want to highlight modified rows only on page
2. Want to get modified rows in managed bean

First One could be achieved without writing a single line of code only using expression, a row in table or view object has four state-

• New
• Modified
• Un-Modified
• Initialized

/* this expression returns state of current row in collection such as table or treeTable*/
#{row.row.entities[0].entityState} 

/*here row is reference variable of collection, this expression returns an int value if it is 
 2-Modified
 0-New
 1-Unmodified
-1-Initialized
*/

• I'm using Departments table of HR Schema to implement this sample app
• after business components configuration ,Drop departments VO from data control on page as af:table
• Now to check row status , i have written following expression in inline style of af:column of af:table, so that it can check state of all rows of table 



#{row.row.entities[0].entityState==2 ? 'background-color:orange' : row.row.entities[0].entityState==0 ? 'background-color:darkgreen' : ''} 



• Now Run your page and change any value of table

       After Updating Values in Row- see modified rows are highlighted

•  Now you are done with first requirement , if we talk about second one, in case you want to get all modified rows in managed bean to perform some operation
• To achieve this i have used a transient attribute in Departments view Object to store state of each row
• Now in RowImpl of departments viewobject i have to write some code to get current state of Row, see the getter method of transient attribute in RowImpl



    /**
     * Gets the attribute value for the calculated attribute CheckRowStatus.
     * @return the CheckRowStatus
     */
    public Integer getCheckRowStatus() {
        byte entityState = this.getEntity(0).getEntityState();
        return new Integer(entityState);

        // return (Integer) getAttributeInternal(CHECKROWSTATUS);
    }



• Now i have placed a button on page to get all modified rows and show a message on page through managed bean
• See the method written in ApplicationModuleImpl class and then exposed to client to be used in managed bean action event



    /**Method to get all modified rows and store corresponding Department Name in an ArrayList
     * @return
     */
    public ArrayList<String> getModifiedRows() {
        ArrayList<String> deptNm = new ArrayList<String>();
        ViewObject deptVo = this.getDepartmentsView1();
        RowSetIterator deptIter = deptVo.createRowSetIterator(null);
        while (deptIter.hasNext()) {
            Row nextRow = deptIter.next();
            if (nextRow.getAttribute("CheckRowStatus") != null) {
                Integer rowStatus = (Integer)nextRow.getAttribute("CheckRowStatus");
                if (rowStatus == 2) {
                    deptNm.add(nextRow.getAttribute("DepartmentName").toString());
                }
            }
        }
        return deptNm;

    }



• Now call this method in managed bean through Binding Layer



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

    /**Method to call AM method and to show modified rows on page in FacesMessage
     * @param actionEvent
     */
    public void getModifiedRows(ActionEvent actionEvent) {
        OperationBinding ob = getBindings().getOperationBinding("getModifiedRows");
        ob.execute();
        if (ob.getResult() != null) {
            ArrayList<String> deptName = (ArrayList<String>)ob.getResult();
            StringBuilder saveMsg =
                new StringBuilder("<html><body><b><p style='color:red'>Modified Rows in Departments table are-</p></b>");

            saveMsg.append("<ul>");
            for (String name : deptName) {
                System.out.println(name);
                saveMsg.append("<li> <b>" + name + "</b></li>");
            }

            saveMsg.append("</ul><br>");
            saveMsg.append("</body></html>");
            FacesMessage msg = new FacesMessage(saveMsg.toString());
            FacesContext.getCurrentInstance().addMessage(null, msg);
        }
    }



• Now again run this page and change some departments then click on get modified rows, it will show currently modified rows

Cheers- Download Sample App