Recent Posts by Shantala Sankeshwar

This article describes the creation of master detail Tree using EJB Datacontrol Objects.Use Case Description Construct ADF Tree using Employees & Departments objects.It is straight forward to build a tree when foreign key relationship exists between the objects. For cases where no foreign key relationships exist, we can use this technique to programatically construct the tree in the view layer.Implementation stepsLet us suppose that we havecreated Java EE Web Application with...

In Jdeveloper 11.1.2.0.0,we can drag any component & drop on graph.It also supports drag/drop between graphs.Use Case Description Let us consider a use case wherein we will drag table row & drop that on the bar graph.Implementation stepsAssume that we have table with Emp records & bar graph that displays Empno & Salary of Employees. Insert drag component inside table:  <af:dragSource discriminant="tab"/> Now insert dropTarget inside barGraph:<af:dropTarget dropListener="#{test....

This article describes simple example of using Project Gantt chart using ADF Business components.Use Case DescriptionLet us create a simple Project Gantt chart using ADF Business components & try to get the selected tasks details.Implementation steps A project Gantt chart is used for project management. The chart lists tasks vertically and shows the duration of each task as a bar on a horizontal time line.To create a basic project gantt chart,we first need to define  2 tables...

This article describes the creation of master detail detail records using EJB Datacontrol.This is done using ADF Train component.Use Case Description Lets us consider that we have countries->locations->departments table with master->detail->detail relationship.We will create countries in first train step ,locations in next train step & departments in the last train step.Implementation stepsLet us suppose that we have created Java EE Web Application with Entities from...

This article describes contextual events with EJB DatacontrolUse Case DescriptionLet us consider a scenario wherein the user wants to display deptno list & commandButton in region1 & region2 displays the Emp records corresponding to selected deptno in region1.We will try to achieve this using contextual events.When the user selects deptno & clicks on the commandButton ,a contextual event with payLoad parameter is broadcasted by taskflow1.This event is then consumed by the ...

This article describes on passing parameter to EJB Method in taskflow.Use Case DescriptionSuppose we have a table displaying Dept records.Table also has column link & clicking on this link displays a region in popup.This region accepts deptno parameter,executes EJB Method & displays respective Emp details in a popup.Implementation stepsLet us suppose that we have created Java EE Web Application with Entities from Emp & Dept table .Also add 'ADF Faces Components 11' under...

This article gives the detailed steps on creating named criteria in EJB Data control.Note that this feature is available in Jdev version 11.1.2.0.0Use Case Description Suppose we have defined an EJB Entity Object & we would like to filter the Entity object based on some criteria,then this filtering can be achieved by creating named criteria in EJB Data Control.Implementation steps Let us suppose that we have created Java EE Web Application with Entities from Emp table Create...

Usecase Description: Suppose we have a Transient attribute that stores the value returned by an Appmodule method,then the easy way to call this method in transient attribute would be using Groovy expression. Consider a simple method in AppmoduleImpl java class that returns the Department name of the selected row of Emp table: public String getDeptName(Number dno) { if (dno == null) return null; else { ViewObject vo =...

Usecase Description: We can define a transient attribute that calls  ViewObjectImpl.java method using Groovy expression. Consider a simple method in EmpViewImpl java class that returns the currentRowIndex:   public Number returnCurrentRowIndex() { return this.getCurrentRowIndex(); } Create an Updatable Transient attribute in EmpView Object.Edit its value & provide a groovy expression "adf.object.viewObject.returnCurrentRowIndex()" to call the above methodRun the...