Navigation Extension for Salesforce Sites

Thinking about how to best handle navigation within Salesforce Sites, I decided to try my luck with setting up an easily re-usable extension that can be applied to an entire site.

Fortunately, it looks like the apex:commandLink element paired with apex:param is able to produce the customizable navigation code I wanted.

Instead of writing out methods like the following...

public PageReference goToPage1() { ... }
public PageReference goToPage2() { ... }
public PageReference goToPage3() { ... }

all that's needed is...

public PageReference goToDestinationPage() { ... }

Much better, right? See the demo source code for more details.