Issue using selectBooleanCheckbox

Hi friends,

I am using a selectBooleanCheckbox option in a page. The page lists essentially employees as well as the box on each line. Now the use case is the user selects the employee records and performs an action on the registers of the emp. When the employee checks the box I call the method below. This method essentially captures the employee number and then put them into an arraylist.

private ArrayList checkedEmps = new ArrayList();

{} public void selectEmpAction (ValueChangeEvent valueChangeEvent)

FacesContext facesCtxt = FacesContext.getCurrentInstance ();

ELContext elCtxt = facesCtxt.getELContext ();

ExpressionFactory elFactory = facesCtxt.getApplication () .getExpressionFactory ();

MethodExpression methodExpr = elFactory.createMethodExpression (elCtxt, "#{rank.") EmpNo} "(, String.class, null);"

ValueExpression valExpr = elFactory.createValueExpression (elCtxt, "#{rank.") EmpNo} "(, String.class);"

System.out.println ("value of emp is" + valExpr.getValue (elCtxt));

int index = 0;

index = checkedEmps.size ();

System.out.println ("the size of the table is" + index);

index = index + 1;

checkedEmps.add (index, valExpr.getValue (elCtxt));

}

When the employee is complete by selecting the emp records (check the boxes for desired emp records) the user enters a value into the text entry box (wage hike) and then clicks the update button. The action that happens by clicking on the update button is the following

public String cb1_action() {}

Add the code in the event here...

BindingContainer links is BindingContext.getCurrent () .getCurrentBindingsEntry ();.

Update the OperationBinding = bindings.get ("updateSelected") (OperationBinding);

ArrayList selectedEmps = null;

update.getParamsMap () .put ("selectedEmps", selectedEmps);

update.getParamsMap () .put ("selectedEmps", checkedEmps);

update.getParamsMap () .put ("hikeAmt", this.getHikeAmount () .getValue ());

Update.Execute ();

Returns a null value.

}

I have a few questions here.

1 > the checkedEmps arraylist is always get initialized to a new Arraylist. I guess the managedbean will be the same instance for multiple selections of box and thus the checkedEmps will not be initialized every time and therefore objects added to checkedEmps will be maintained. Kindly let me know if my understanding is here

2 > that an employee is updated with the salary and the employee updated is the last selected. However, after update, I get this error "ORA-00904:"SELECT_FLAG "invalid identifier". " The box is based on a transitional Boolean element that has been added to the original Version.

The Jdev is Studio Edition Version 11.1.2.4.0. Give me an idea of how I can store the EMP have been chosen and how I can get rid of the error.

Thank you

For Points:

(1) what is the scope of your beans in. If it is carried in the request, then it will be initialized again each time. You must define more demand. PageFlowScope if workflow.

(2) can you please provide error stack trace. An employee's get updated because of your problem in the point number 1.

Thank you

Tags: Java

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