Difference between Html***Builder and Dom***Builder classes in Gwt

Question

I am trying to manipulate the DOM extensively from my Gwt code. In the process I discovered two groups of classes implementing a common base interface e.g..

interface DivBuilder  

class HtmlDivBuilder implements DivBuilder

class DOMDivBuilder implements DivBuilder 

for each and every Html tag there are two such sets of classes implemented

I am confused as to what is the purpose and use behind this.

Any pointers shall be helpful .

Answer 1

The Html family builds a string that can later be used with innerHtml. It can be used server-side too.

The Dom family builds a DOM subtree.

The goal is you can have code that uses the builders and can be called with either concrete implementation depending on the use case. As an example, the cell table could use either strategy and the builders could stay the same.