RE: [Springframework-developer] custom XML config files

[THOMAS, J. (SBCSI) <jt...@sb...>]

In my case I have my own factory which uses a  xml file  to model different
beans and other type's of componenents.I would like to add objects created
by my factory into the spring context,and also share objects created in
Spring factory in my factory, Iam not sure how it can be done. It will be
nice if spring gives us feature to plug in user defined factories into
spring context.

-----Original Message-----
From: Seth Ladd [mailto:se...@eh...] 
Sent: Wednesday, June 23, 2004 11:09 AM
To: spr...@li...
Subject: Re: [Springframework-developer] custom XML config files


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| Using the example above we could use a simple macro which turns
|
|     <connector url="..." timeout="2000"/>
|
| into
|
|     <bean class="MyConnectorBean">
|     <property name="url"><value>...</value></property>
|     <property name="timeout"><value>2000</value></property>
|     </bean>
|
| This could be a trivial optional transformation step written in a little
| Java code, where the ActiveMQXmlBeanFactory could derive from the Spring
| XmlBeanFactory and install a custom transformer into the
| XmlBeanDefinitionReader so that any XML notation the ActiveMQ factory
| knew about could be transformed into normal Spring XML ready for Spring
| to do its thing.

One way to do that would be XSLT.  I've often considered doing just that
type of thing.  For instance, our views.xml file is getting huge.  That
type of file really lends itself to a shortened version.  Then, using
XSLT at runtime, we can transform the views optimized XML into a full
Spring BEANS xml file.

I'd rather see this:

<jstl url="/WEB-INF/jsp/foo.jsp" />

than:

<bean class="org.springframework.servlet.view.JstlView">
~  <property name="url">
~    <value>/WEB-INF/jsp/foo.jsp</value>
~  </property>
</bean>

Other nice things about this is a DTD can be created for the shortened
version, to allow for validating and smoother XSLT.  Also, if others
need to extend the shorted form, they can either edit the XSLT file, or
better yet, just start writing spring BEANS elements.  The XSLT file
should just recognize the native spring beans elements and transfer them
over.

A XstlBeanFactory would do the trick there.  Given an XML file, and a
XSLT file, it should transform then delegate to XmlBeanFactory.

Ideas?  Thoughts?  This might be a good middle ground for those that
like XML and those that want to see the XML verbosity reduced somehow.

Seth

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