@Path("/products")
public class ProductResourceLocator {

	@PathParam("productType") 
	private String productType = null;
	
	@Path("/{productType}")
	public Object getProductResourceLocator() {
		if ("books".equals(productType)) {
			return new BookResource(); 
		}
		if ("games".equals(productType)) {
			return new GameResource();
		}
		throw new WebApplicationException(Status.NOT_FOUND);
	}

}

public class BookResource {

	@GET
	@Path("/{id}")
	@Produces({ "application/xml", "application/json" })
	public Book getProduct(@PathParam("id") Integer id) {
		return null;
	}
}

/<rest_app>/products/{productType:String};bar={String}/{id:int}