Accessing Session Scope and Request Scope objects in ADF

We can access the session Scope objects in ADF by using ADFContext class.

The syntax for this is:

ADFContext.getCurrent().getSessionScope().get(obj);

Where obj is the object name configured in the session scope.

In the same way, we can also access the objects in request scope by using the below syntax:

ADFContext.getCurrent().getRequestScope().get(obj);

Fetching values of a list object of ADF bindings from Java

Before giving the solution, let me explain my scenario. I have JSF binding object “internalProfile” which is a list of a class. The definition of the object is like below.

List<KeyValue> internalProfile=new ArrayList<KeyValue>();

KeyValue is a bean with two String properties key and value.

A binding is created for the “internalProfile” and input fields are created for its values as below in JSF page.

//code in the JSF

<af:forEach items="#{bindings.internalProfile.rangeSet}" var="row" varStatus="sdiIndex"> <af:inputText value="#{row['value']}" label="#{row['key']}"                            id="it_${sdiIndex.index}"></af:inputText>             </af:forEach>

We can see the bindings of the page below.

Now, I need to fetch all these text fields in my bean which is achieved by using the below code snippet.

BindingContainer bc =BindingContext.getCurrent().getCurrentBindingsEntry();             oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding list = (oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding)bc.get(BINDING_INTERNAL_PROFILE);             Row[] allRowsInRange = list.getAllRowsInRange();

Invoking Application Module from Java

Below code snippet will allow us to access the application module from java class.

In this code, I was trying to get records from the table.

For this, I have got the view object from the application module and applied a view criteria on the view object through which I got the records row.

/*Accessing Application Module*/         AppModuleImpl appModule =             (AppModuleImpl)ADFUtils.getApplicationModuleForDataControl("AppModuleDataControl"); /*Accessing View Object from App Module. Here, User_infoView is my own view created in App module*/         ViewObjectImpl voImpl = appModule.getUser_infoView1();         ViewCriteria vc = voImpl.createViewCriteria();         ViewCriteriaRow vcRow = vc.createViewCriteriaRow();         vcRow.setAttribute(“firstname”, "= 'anand'");         vc.add(vcRow);         voImpl.applyViewCriteria(vc);         voImpl.executeQuery();         System.out.println("Query: " + voImpl.getQuery());         while (voImpl.hasNext()) {             Row row = voImpl.next();             String[] attributeNames = row.getAttributeNames();             for (int index = 0; index < attributeNames.length; index++) {                     System.out.println("Required: " +row.getAttribute(attributeNames[index]));             }         }

Invoking actions before loading the JSF or JSFF page

If we want to invoke the operations like Create or CreateInsert of a data control while loading the page, we can achieve this by doing below

• Open JSF or JSFF page, go to bindings tab
• In the “Executables”, click on “+” symbol to add, select InvokeActions options from the given list
• Enter some ID to the action and select Binds from the given list
• Select the action and click on pencil icon to edit it, “Common Properties” window will be opened
• Go to common tab, select a value to Refresh (for example, every time when the JSF page is loaded, if the create action needs be executed then the refresh value should be “always”)
• Give the Refresh Condition

• Click on Finish
• Move the action to the top of the “Executables” as shown in the below image

 

Assign DBSequence to a property in Entity Object

I want to add a sequence to the user_id field in user_info table of my database. For which I have followed the below procedure.

• Create a db sequence named “userid”

Create sequence userid start with 10000000001

• Open the Entity Attribute, “user_id” in the Entity Object of the application
• Select Type as Integer and  click on Value type “Expression” radio button
• Enter the below expression in the value field

 (new oracle.jbo.server.SequenceImpl("USERID",adf.object.getDBTransaction())).getSequenceNumber()

Where “USERID” is the sequence name which is created already

• Click on Ok