Access JSF and Primefaces version numbers programmatically

Question

I use PrimeFaces 3.5.x and Mojarra JSF 2.1.x I would like to access and show the versions of both libraries programmatically.

I use the versions as maven2 properties

Answer 1

In PrimeFaces 4.0, Constants.VERSION is removed in favor of;

RequestContext.getCurrentInstance().getApplicationContext().getConfig().getBuildVersion();

Also watch out for FacesContext.class.getPackage().getImplementationVersion();, it doesn't work on some app servers like websphere.