> Please check out the two attached classes: Clazz and Field. These are What about Method?
> client > APIs only. Nothing is said about where the metadata is coming from - > that's > to come later. > > Here are some notes on the design of these two classes: > > 1. Clazz is a metadescription of a generalized bean (JDK bean, "modern" > bean, DynaBean, Map, EJB etc). > > 2. In some cases there is more than one Clazz that can describe a > particular > object. For example, the same object can be described as a standard bean > as > well as a "modern" bean. Therefore I have introduced the notion of a > "model" identified by a URI. I am thinking the URI itself might map to a > verbal description of the model. > > 3. Clazz has a newInstance() method that is responsible for object > allocation. > > 4. You do not get a list of Field objects from a Clazz. Instead, you get > a > list of field names and then can acquire a Field object for an individual > field. The reason is that allocation of Field objects may involve > multiple > plugins and therefore be costly. Also, in the case of a Map, we would > effectively be recreating the map with the Field objects. > +1 > 5. Field hides the mechanisms of actual value extraction/manipulation. > You > don't get any "readMethods", "writeMethods" etc. You simply delegate the > value manipulations to the Field object. > +1 > 6. Field is scalar, indexed and mapped at the same time and has all > corresponding APIs. If you use the wrong APIs on a field, it will just > throw an exception. > So we need some Methods like isIndexed(), isMapped(), isListed()? > 7. There are attributes associated with a Clazz and Field. > Can I distinguish declared Fields/Methods from inherited ones? How do I retrieve super classes and interfaces? What if I have to use "mixed" plugins, i.e. for the clazz at hand I have a XML specification, how do I find the plugin for the super class (how do I find the XML spec if there is one and how do I decide which plugin to use if no XML spec can be found.) Victor -- To unsubscribe, e-mail: <mailto:commons-dev-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:commons-dev-help@;jakarta.apache.org>
