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Showing posts with label Binding. Show all posts
Showing posts with label Binding. Show all posts

Tuesday 20 May 2014

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 :-)

Monday 26 November 2012

Tree Table Component in Oracle ADF(Hierarchical Representation)

Hello All

This post is about ADF Faces Tree Table component (about designing component and get selected value from tree table)

We have a simple sample application that shows how can we use tree table component in Oracle ADF.
Tree Table component represents  Hierarchical view of Master Deatil form of data
Here we take example from HR schema using Employees and Department table
Follow these steps -

  • Create EOs,VOs of Employees and Department table in HR Schema and create association and viewlink between Department To Employees considering Department Id
  • Now go to data control and select Department table and drop it on page as Tree table 

Drop ViewObject as ADF Tree Table
  •  Now we have to edit its bindings, it means you have to select attributes that you want to display in page, and below Department table you should add Employees table using "add" button on top, and select appropriate Iterator in EL picker
Edit tree binding in pageDef
  • Now go to page and select treetable in Structure window of Jdeveloper and Go to its selection listener and copy default value
Override default selection listener
  • And change selection listener set it to bean, click on edit and create new selection listener in Bean

Create custom selection listener in managed bean for af:treeTable
  •  Now go to Selection Listener and Use this code to get Value of selected node in treetable, if you will get value of node you can perform any operation on Tree Table
    public void treeTableSelectionListener(SelectionEvent selectionEvent) {
        String adfSelectionListener = "#{bindings.Department1.treeModel.makeCurrent}";

        FacesContext fctx = FacesContext.getCurrentInstance();
        Application application = fctx.getApplication();
        ELContext elCtx = fctx.getELContext();
        ExpressionFactory exprFactory = application.getExpressionFactory();
        MethodExpression me = null;
        me =
 exprFactory.createMethodExpression(elCtx, adfSelectionListener, Object.class, new Class[] { SelectionEvent.class });
        me.invoke(elCtx, new Object[] { selectionEvent });
        RichTreeTable tree = (RichTreeTable)selectionEvent.getSource();
        TreeModel model = (TreeModel)tree.getValue();
        //get selected nodes
        RowKeySet rowKeySet = selectionEvent.getAddedSet();
        Iterator rksIterator = rowKeySet.iterator();
        while (rksIterator.hasNext()) {
            List key = (List);
            JUCtrlHierBinding treeBinding = null;
            treeBinding = (JUCtrlHierBinding)((CollectionModel)tree.getValue()).getWrappedData();
            JUCtrlHierNodeBinding nodeBinding = treeBinding.findNodeByKeyPath(key);
            Row rw = nodeBinding.getRow();
            System.out.println("row: " + rw.getAttribute(0)); // You can get any attribute
            System.out.println("View Object name---->" + nodeBinding.getViewObject().getName());

  •  Now run your page and when you will click on any node you will find its value on Console---Cheers Happy Coding!
Sample ADF Application