The buildpack provides a number of other utilities that may help in implementing components.
The ClassFileUtils class provides a method for getting all of the class files in an application.
The ConfigurationUtils class provides a method for getting the parsed contents of a configuration file from the buildpack configuration directory.
The GroovyUtils class provides a set of methods for finding groovy files and determing if they are of any special kind (e.g. they have a main method, they are a pogo, etc.).
The JavaMainUtils class provides a a set of methods for determining the Java main class of an application if it exists.
The Properties class provides a Ruby class that can read in a Java properties file and acts as a Hash with that data.
The shell method encapsulates a standard shell invocation in the buildpack. It ensures that the output of the command is suppressed unless the command fails. When that happens, the content of stdout and stderr are printed. This method is mixed into the BaseComponent class and all of its subclasses.