Look at the enforcer plugin. As each rule is a component that gets
configured.
On 10-Aug-09, at 8:54 PM, Jochen Wiedmann wrote:
Hi, Jason,
thanks for your reply. That will at least help me to get a working
solution. However, I am not quite sure whether I expressed myself
right. Sorry, if not.
My ideal solution would be to have something like
<plugins>
<plugin>
<artifactId>myPlugin</artifactId>
<configuration>
<myComponent hint="foo">
.. <- XML snippet
</myComponent>
</configuration>
</plugin>
</plugins>
Not quite sure, but I think that's a bit more than you wrote, because
I've got to catch Maven's automatisms at some point.
Any idea for this variant?
Thanks,
Jochen
On Tue, Aug 11, 2009 at 5:15 AM, Jason van Zyl<[email protected]>
wrote:
On 10-Aug-09, at 1:32 PM, Jochen Wiedmann wrote:
Hi,
in a plugin, I'd like to select a component dynamically. Basically,
I'd like to have something along these lines:
<configuration>
<myComponent hint="foo">
...
</myComponent>
</configuration>
The idea is to use the hint for looking up the "myComponent" bean
and
use the XML fragment between <myComponent> and <myComponent> to
configure the bean.
Is that possible? Any other ideas how to achieve my goal?
// Lookup you unconfigured component
//
Foo component = container.lookup( Foo.class, "myComponent" );
// Create a PlexusConfiguration to use against your component and
populate
as necessary
// by adding elements and attributes. Use autocomplete in your IDE
to find
out what's available.
PlexusConfiguration configuration = new XmlPlexusConfiguration(
"configuration" );
// Look up the default component configurator which is used
internally to
configure component.
//
ComponentConfigurator configurator =
container.lookup( Configurator.class );
// I assume you're in a plugin so you'll need the classrealm of the
plugin
itself
// which you can access through the mojoExecution using the $
{mojoExecution}
expression
ClassRealm pluginRealm =
mojoExecution
.getMojoDescriptor().getPluginDescriptor().getClassRealm();
// Use the configurator to configure the component
configurator.configureComponent( component, configuration,
pluginRealm );
You might want to make your own implementation of the
PlexusConfiguration if
you're going to use another source other then XML. Internally in
Plexus the
configuration can come from any source but in Maven it's primarily
XML but
you're not restricted to XML.
Thanks,
Jochen
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----------------------------------------------------------
Jason van Zyl
Founder, Apache Maven
http://twitter.com/jvanzyl
http://twitter.com/SonatypeNexus
http://twitter.com/SonatypeM2E
----------------------------------------------------------
People develop abstractions by generalizing from concrete examples.
Every attempt to determine the correct abstraction on paper without
actually developing a running system is doomed to failure. No one
is that smart. A framework is a resuable design, so you develop it by
looking at the things it is supposed to be a design of. The more
examples
you look at, the more general your framework will be.
-- Ralph Johnson & Don Roberts, Patterns for Evolving Frameworks
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----------------------------------------------------------
Jason van Zyl
Founder, Apache Maven
http://twitter.com/jvanzyl
http://twitter.com/SonatypeNexus
http://twitter.com/SonatypeM2E
----------------------------------------------------------
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