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Get the current node of a tree table in Oracle ADF | Techartifact

Requirement- To get the current current node of tree table and get value of that node.

Solution- we will get the rowKeySet of the treetable.The using findNodeByKeyPath method , we will get the selected node.I already posted to get selected row of tree

RowKeySet selectedRows = treeTable.getSelectedRowKeys();
//use EL to access binding (note that you can do this in Java as well)
JUCtrlHierBinding treeTableBinding = (JUCtrlHierBinding) executeValueExpression("#{bindings.<tree binding name>}");  
//get first entry of selected rows (single selection case)
JUCtrlHierNodeBinding node =  treeTableBinding .findNodeByKeyPath((List)selectedRows .iterator().next());
... do the work with the node here ...

private Object executeValueExpression(String valueExpression){
      FacesContext fctx = FacesContext.getCurrentInstance();
      ELContext elctx = fctx.getELContext();
      Application app = fctx.getApplication();
      ExpressionFactory exprFactory = app.getExpressionFactory();
      ValueExpression valueExpr = exprFactory.createValueExpression(
                                elctx,
                                valueExpression,
                                Object.class);
       return valueExpr.getValue(elctx);
      }

Happy coding with Vinay Kumar in Techartifact

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How to perform addition for attribute of Number type in expression language

When adding two attributes of oracle.jbo.domain.Number type in Expression Language like EmpSal and EmpBonus as below  :

#{bindings.bindings.EmpSal.inputValue + bindings.EmpBonus.inputValue}

or adding number 1000 to EmpSal as  :

#{bindings.bindings.EmpSal.inputValue + 1000}

You may get below exception :

Unexpected exception caught: java.util.MissingResourceException, msg=Can’t find resource for bundle java.util.PropertyResourceBundle, key el.convert

To Eliminate this Exception, Add EmpSal and EmpBonus as below :

#{bindings.EmpSal.inputValue.value + bindings.EmpBonus.inputValue.value}

Add ‘value’ to inputValue to remove the exception.

Happy learning in TechArtifact. 🙂

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How to check ifdirty (is modified) for View Object?

Requirement – Checking if data modified in viewobject ADF

Solution-You can use isDirty() method provided by API to get status 

 DCBindingContainer bind =(DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
        JUCtrlHierBinding object = (JUCtrlHierBinding)bind.findCtrlBinding("DepartmentVO1"); // or get ViewObject form Iterator in ADFUtils.
        ViewObject deptVo = object.getViewObject(); 
        Boolean b = deptVo.getApplicationModule().getTransaction().isDirty();This gives Boolean value of True/False.

another way

DCBindingContainer dcBindingContainer=(DCBindingContainer)
BindingContext.getCurrent().getCurrentBindingsEntry();
if(dcBindingContainer.getDataControl().isTransactionModified()){
//Code goes here...
}

few more use case i found on internet i.e http://oracleadfhowto.blogspot.de/2012/03/iterator-uncommitted-data-availability.html, so thought of sharing that as well –

1. If you are using iterator based UI component like table:
Expression #{row.row.entities[0].entityState} will return state viz. (0 – New, Modified – 2, Unmodified – 1, Initialized – -1 where row refers to the table node and row.row is the instance of row in the iterator/table.

The following expression also notify that there is dirty data available –

-> #{!bindings.EmployeesView1Iterator.dataControl.TransactionDirty}   // this statment will notify that there is uncommitted or unsaved data in the iterator
-> #{!bindings.Commit.enabled}
-> #{!controllerContext.currentRootViewPort.dataDirty}
-> #{!controllerContext.currentViewPort.dataDirty}

Happy ADF learning with Vinay in techartifact….