See for details: - http://scottfrederick.io/blog/2012/05/22/Custom-PropertySource-in-Spring-3.1---Part-1/ - http://scottfrederick.io/blog/2012/05/08/Custom-PropertySource-in-Spring-3.1---Part-2/ - http://scottfrederick.io/blog/2012/05/30/Custom-PropertySource-in-Spring-3.1---Part-3/
