Default implementation of the UrlMappingsHolder interface that takes a list of mappings and
then sorts them according to their precedence rules as defined in the implementation of Comparable.
A UrlMapping implementation that takes a Grails URL pattern and turns it into a regex matcher so that
URLs can be matched and information captured from the match.
A factory bean that creates the URL mappings, checking if there is a bean
called urlMap in the ctx and merging that with the mappings set explicitly
on this bean.