On Feb 1, 2008, at 9:34 AM, Kevan Miller wrote:
On Feb 1, 2008, at 11:23 AM, [EMAIL PROTECTED] wrote:
Author: dain
Date: Fri Feb 1 08:23:21 2008
New Revision: 617547
URL: http://svn.apache.org/viewvc?rev=617547&view=rev
Log:
Work in progress on graph building
Hey Dain,
Having fun? ;-)
Can you give us an idea on what you mean by graph building and where
you're heading with this?
Lately, I have been working on replacing the simple DI code in plexus
with xbean-reflect. Plexus currently doesn't support lost of stuff
like constructor injection, static factory injection or factor beans.
The idea is that instead of trying to add these features to the
current DI code in plexus that we make the DI engine pluggable, and
xbean-reflect will be the first plugin (with pico to follow).
Currently, xbean-reflect can build a single object instance by
specifying the instance class and properties. The value of the
properties can be either an object or a "recipe" describing how to
build another object instance. So, if you sit back and think about
it, xbean-reflect can currently build a tree of object instances
(child nodes are object instances created and injected into the outer
object). For plexus, we need to support having references between
objects by name.
The new code adds a name to each recipe and a reference recipe. With
these two small additions, we have all the information necessary to
build a complex object graph. The hard part of this change was not
expanding the build logic to support refs (I copied my code from CXF
that does the same thing for RPC-Encoded), it was figuring out how to
expose the feature, and this is one of the big things I'm still
testing up. If you want to see how it works in detail, take a look at
the AbstractObjectGraphTest. From the high level you create an
ObjectGraph, and load it up with recipes for all the objects you can
create. Then say, "create me foo" and the code creates the object
named foo. It is pretty simple.
If there is anything else you want to know let me know. It is still a
work in progress (I'm hacking on it today).
-dain
