Merging multiple ObservableList notifications

Question

I have an MVC architecture implemented using JavaFX for querying a medical database. I have two ListViews, one for a database filter, and one for the database fields to be returned. When a user adds a value to the ListView<Filter> an item is usually also added to the ListView<Field>. The ObservableLists for each of these ListViews is encapsulated in a ClientModel for the GUI.
The controller listens for changes to either of these ListViews, (via the model) and submits a query to the database whenever either of them changes. The problem is that when the above "add" occurs, two notifications are sent to the controller - one for each ListView, so I get a double notification for what if effectively one user action.
There are a number of ways to address this architecturally, of course, but I'm looking for a best practice, here. I'm sure others have encountered having the Listeners from multiple UI Controls firing redundantly. Is there an especially applicable pattern to use in JavaFX for controlling these notifications?
Right now I'm thinking of simply adding a "Facade" interface in the ClientModel that encapsulates the two ObservableLists behind an empty ObservableValue, like a SimpleBooleanProperty - which updates the other lists and then call it's own invalidated() method. The Controller would attach an invalidationListener to this Property instead of the other two.
This solution seems a bit kludgy and not very extensible. Does anyone else have a cleaner solution? I'll hack this together and try to post a subset of the code once I have something "working".

Answer 1

Here is where you can download JAI-ImageIO
https://jai-imageio.dev.java.net/binary-builds.html
What you want is the core jar file called "jai_imageio.jar." You can obtain this jar by installing one of the stable releases and going to: your java folder+ / jre / lib / ext /. You can also obtain this jar by extracting it from the zip folder of any one of the daily builds.
Once you have the jar add it to the library of your aplication and voila. The next time you use ImageIO.read(...) or ImageIO.write(...) to read or write a tiff file it should work. The jar file also contains readers and writers for a several other formats as well.
As for the libraries that you already have, the "jai_core" is for image processing while "jai_codec" is used to read and write images. Think of JAI-ImageIO as the "jai_codec" library but following the Java Image I/O API (image readers, image writers, ImageIO, ect...). To read an image using the combined "jai_core" and "jai_codec" library you would have to do
String filename = //path and name of the file to be read;
RenderedImage image = JAI.create("fileload", filename)or
URL url = //some URL;
RenderedImage image = JAI.create("url", url);Eventually, in due time JAI-ImageIO and "jai_codec" will probably merge. As it is, JAI-ImageIO does not need "jai_core" or "jai_codec" to function. It is self-contained.