There are two kinds of deferred binding rules: replace-with and generate-with.
replace-with rules are used to switch between several implementations depending on binding properties (e.g. <when-property-is name="user.agent" value="ie6" />) generate-with on the other hand calls a Generator for the class or interface. Such a rule can also use binding properties as conditions (you can even say "replace-with that class when such property is X; and generate with that one otherwise") but it's generally not the case. The generator is passed the class/interface that's being GWT.create()d and uses reflection (not java.lang.reflect though) to generate one or several files, which generally include Java source code (that will be compiled just after being generated) but an also include other kinds of files (e.g. images or CSS files, in the case of ClientBundle or ImageBundle). In the case of RPC services, the rule reads: <generate-with class="com.google.gwt.user.rebind.rpc.ServiceInterfaceProxyGenerator"> <when-type-assignable class="com.google.gwt.user.client.rpc.RemoteService"/> </generate-with> and the ServiceInterfaceProxyGenerator generates the Xxx_Proxy class you're seeing in DevMode (which is also compiled on-the-fly). Generators are used a lot in GWT: for I18N (Messages, Constants), UiBinder, ClientBundle, ImageBundle, SafeHtmlTemplates, PlaceHistoryMapper, AutoBeans, RequestFactory, RPC, etc. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/gI4Q98Icg9IJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
