Luc Bors Weblog

Today I had to fix an issue in one of our ADF applications. For those of you working with ADF (as I do too occasionally) this might be valuable, so I decided to share this. The application is based on an old Oracle Forms applications and I had to implement the following functionality: FRM-41830 : List of Values contains no entries. In other words (more ADF like) : If you are about to render a List of Values and that List of Values contains no rows, just show a message instead of showing the List of Values. In this post I will describe how I was able to implement this although it turned out to be a challenge. Below are the steps that I took. Note that the Application can be downloaded from GIT. 1) I use a UI pattern where we use readonly table and do edits in a popup. That means that any List of Values will add an additional popup to the UI. 2) The List of Values that I use in this sample only shows entries where the minimum salary is less then the employees current sal...

How can we add a message programatically ? Last week I got this question for the second time in a months time. I decided to write a short blogpost on how this works. Adding messages is very easy, you just need to know how it works. You can add a message to your faces context by creating a new FacesMessage. Set the severity (ERROR, WARNING, INFO or FATAL ), set the message text, and if nessecary a message detail. The fragment below shows the code for an ERROR message. 1: public void setMessagesErr(ActionEvent actionEvent) { 2: String msg = "This is a message"; 3: AdfFacesContext adfFacesContext = null; 4: adfFacesContext = AdfFacesContext.getCurrentInstance(); 5: FacesContext ctx = FacesContext.getCurrentInstance(); 6: FacesMessage fm = 7: new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, ""); 8: ctx.addMessage(null, fm); 9: } I created a simple page with a couple of buttons to show the result of setting the message. When the but...