Defines an abstract representation of a report scriptlet. Scriptlets are useful when a specific behaviour is needed
in certain moments of the report filling process, such as report, column or group initialization. Scriptlets must implement
the abstract methods that define the behaviour at the specified moments.
author: Teodor Danciu (teodord@users.sourceforge.net) version: $Id: JRAbstractScriptlet.java 1229 2006-04-19 10:27:35Z teodord $