There is a packaged application created in Oracle ADF (lets generalise and say any Java EE framework) that I would like to customise/extend. I want to make changes like add a new JSF page or modify a JSF page in there and change the data which appears on the page.
I do not have the source code, just the war/ear file. Can I import this in JDeveloper for ADF (or Eclipse/NetBeans/IntelliJ in case of other EE frameworks) and create new objects extending the jar files in there without having the source code?