Project Idea: Cleaner ways of hooking up a list of beans to a JTable.

From:
Daniel Pitts <newsgroup.spamfilter@virtualinfinity.net>
Newsgroups:
comp.lang.java.gui
Date:
Sun, 17 Jan 2010 12:08:25 -0800
Message-ID:
<%6K4n.11467$Mv3.4528@newsfe05.iad>
Please forgive the long winded post, I'm just thinking out-loud here. I
wouldn't be surprised if there is already a project that supports this,
but it would be nice if there was a small, self-contained library that
handled this (and other similar Swing "*Model" class use-cases).

It is often the case that want to present a table which is backed by a
list of beans, where there is a set of properties which correspond to
the columns of the table.

Swing provides a somewhat round-about way to handle this. If you use a
default TreeModel (or if you create your own), you have to wire up a lot
of code that handles row insertion/deletion, as well as property value
changes.

The project I propose: Using some sort of IoC (probably AOP, or some
sort of Proxy, but the less biolerplate code, the better) add the
appropriate PropertyChangeListener support to a class of beans, and
create a TableModel which will handle the appropriate connections of
property listeners to table events.

When requesting a TableModel, you can specify the Bean class and a
mapping of property names to column names. You should be able to omit
properties you don't want to show up ("class" would be a common
example). Also, a simple way to bind cell renderers/editors to a
property would be useful.

It might also be useful to provide a way that beans can provide default
values for column names/editors/renderers through Annotations. That
way, if the bean is reused in several different table, there is a
built-in consistency.

Oh, and anywhere that it is feasible, Generics should be used for
type-safety. As an analogue, it is possible to create a class
GenericListModel<T> implements ListModel, java.util.List<T>, for
typesafe access to the contents of the model.

Is anyone interested in collaborating on such a project? Are there
existing projects which fulfill this need, even if only partially?

Thanks,
Daniel.

--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>

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