Myujth

Table:Item

Columns:

 ItemNumber,
 Description

Transient Attribute1:
Items

LOV created on Items which displays Item Number

Transient Attribute2:

 ItemsDescription-This should display Description of above item selected.Added following code on Attribute 2:


 if(ItemNumber!=null)
 oracle.jbo.Key keyVal=new oracle.jbo.Key(ItemNumber); 
 return ItemVO1.findByKey(keyVal,1)[0].getAttribute("Description"); 
 
 else
 
 return null; 

Need to display description on Attribute2 column

What I understood that your requirement is :

You need to show item description based on item Number selection in LOV in ADF.

Item Description and Item Number both are Transient field.

I have used ADF 11g.

I do not have any item related table. So I used 2 VO for Emp table itself.

 - One is base EmpVO
 - Second is LOV VO (empObjVO)

Table : Emp

 - emp_id
 - emp_name
 - item_emp_id ( Transient variable - LOV - based on emp_id)
 - item_emp_desc (Output Transient variable - Output text - On selection of LOV)

empObjVO - contains

 - emp_id ( This column is list for item_emp_id)
 - emp_name (This column will be description for selection of emp_id)

EmpVo

 - item_emp_id has LOV of empObjVO1 with List Attribute and UI display attribute both.
 ( As you told item number is displayed in LOV. consider emp_id as item_number here).

 List type is choice list.

After all above configuration, Place item_emp_id and item_emp_desc in a jsff page as select one choice and output text respectively.

item_emp_id definition in page :

 <af:selectOneChoice value="#bindings.item_emp_id.inputValue"
 label="#bindings.item_emp_id.label"
 required="#bindings.item_emp_id.hints.mandatory"
 shortDesc="#bindings.item_emp_id.hints.tooltip"
 id="soc3" autoSubmit="true"
 valueChangeListener="#bean1.changeVal">
 <f:selectItems value="#bindings.item_emp_id.items" id="si3"/>
</af:selectOneChoice>

Make autosubmit=true for it.

Create ValueChangeEventListner and create a method in a bean to trigger on change of value in LOV.
item_emp_desc definition is :

 <af:outputText value="#bindings.item_emp_desc.inputValue" id="ot1"
 partialTriggers="soc3"/>

Use partial trigger as soc3 because it is dependent on soc3.

public void changeVal(ValueChangeEvent vce) 
 // Add event code here...
 Integer selectedCode=null;
 //As we get indexes not value of LOV so need to map selected index with value.

 if (vce.getNewValue() != null) 
 this.setvalueToExpression("#bindings.item_emp_id.inputValue",
 vce.getNewValue()); //Updating Model Values
 selectedCode =
 Integer.parseInt(this.getValueFrmExpression("#bindings.item_emp_id.attributeValue").toString());

 System.out.println("******** Selected Value in List***** " +
 selectedCode);
 System.out.println("*******Display Value in List ****" +
 getValueFrmExpression("#bindings.item_emp_id.selectedValue.attributeValues[1]"));
 

 String e_id=selectedCode.toString(); //It will contain selected item_emp_id
 DCBindingContainer bindings =
 (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
 DCIteratorBinding dcIteratorBindings =
 bindings.findIteratorBinding("EmpView1Iterator"); // Base table Emp VO iterator
 DCIteratorBinding dcIteratorBindings1 =
 bindings.findIteratorBinding("empViewObj1Iterator"); // LOV table Emp Vo iterator
 ViewObject vo = dcIteratorBindings.getViewObject();
 ViewObject vo1 = dcIteratorBindings1.getViewObject();
 Row r1 = vo.getCurrentRow(); // get current row of base table VO


 vo1.setWhereClause("e_id = " + e_id); // set where clause to get the description from LOV in VO1
 vo1.executeQuery(); //execute it.
 if(vo1.hasNext())
 
 Row r=vo1.next(); // Get the row from LOV VO

 if(r!=null)
 
 r1.setAttribute("item_emp_desc", r.getAttribute("EmpName")); //set it to item_emp_desc which is a transient variable for output.
 
 




 public void setvalueToExpression(String el, Object val) 
 FacesContext facesContext = FacesContext.getCurrentInstance();
 ELContext elContext = facesContext.getELContext();
 ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
 ValueExpression exp = expressionFactory.createValueExpression(elContext, el, Object.class);
 exp.setValue(elContext, val);
 


 public String getValueFrmExpression(String data) 
FacesContext fc = FacesContext.getCurrentInstance();
Application app = fc.getApplication();
ExpressionFactory elFactory = app.getExpressionFactory();
ELContext elContext = fc.getELContext();
ValueExpression valueExp = elFactory.createValueExpression(elContext, data, Object.class);
String Message = null;
Object obj = valueExp.getValue(elContext);
 if (obj != null) 
Message = obj.toString();
 
 return Message;
 

For undestanding the index to value conversion I have taken reference from

 [http://www.awasthiashish.com/2014/05/getting-selected-value-not-index-display-value-of-select-one-choice-programmatically-in-adf.html][1]

It may help you.