This class will return the proper ICoordinateSystemTransformation based on what coordinate system strings that it receives. There is one method that needs to be overridden.

public ICoordinateSystemTransformation createTransformation(String from, String to)

The string from is the name of the crs that we are converting from. The string to is the name of the crs that we are converting to. This method will usually simply return the ICoordinateSystemTransformation that you have defined that matches the to or from strings.