Default implementation of the WroModelFactory builds the WroModel after an xml is parsed. This solution is good enough when you know a priori how your model looks like and what are the resources your system should use. But what should you do when you know how the model looks like only in the runtime?


Every WroModel is built using a factory called WroModelFactory. This is how the interface looks like:

public interface WroModelFactory extends ObjectFactory<WroModel> {
   * Called to indicate that the factory is being taken out of service.
  void destroy();

The !ObjectFactory interface defines a single method (create):

public interface ObjectFactory<T> {
  T create();

The create method is called each time the fresh version of WroModel is required by WroManager. You can easily create a custom implementation of WroModelFactory and build the WroModel using the runtime knowledge.


public class MyWroModelFactory implements WroModelFactory {
  public WroModel create() {
    return new WroModel().addGroup(new Group("g1").addResource(Resource.create("/path/to/resource.js", ResourceType.JS)));

  public void destroy() {
    //do some clean-up if required.