Jeremias Maerki wrote:
> "For a given application, there can be multiple event models active at
> the same time. In FOP, each renderer is considered to be a plug-in and
> provides its own specific event model. The individual event models are
> provided through an EventModelFactory. This interface is implemented for
> each event model and registered through the service provider mechanism
> (see the plug-ins section for details)."

Ok. Maybe that’s just me, but after reading that section, I still fail
to understand what an ‘event object model’ is. And since that section
starts by explaining implementation details (names of parameters not
provided by the JVM, need of QDox), I’m inclined to skip it all. After
all, I’m not a developer, but a user of the library.

> And

That section starts with “The event subsystem is extensible.” I don’t
want to extend it, I just want to use it!

And nowhere is it written that something must also be added to the build
file. This is all confusing.

But I guess I shall feel free to improve it as I see fit.

Sorry for the rant, but I had to get that off my chest.

> On 28.10.2009 12:09:24 Vincent Hennebert wrote:
>>> Author: jeremias
>>> Date: Wed Oct 28 09:09:55 2009
>>> New Revision: 830476
>>> URL:
>>> Log:
>>> Added missing EventModelFactory to avoid error:
>>>   java.lang.IllegalStateException: Event model doesn't contain the 
>>> definition for org.apache.fop.accessibility.AccessibilityEventProducer
>>> Modified:
>>> xmlgraphics/fop/trunk/src/java/META-INF/services/
>>> xmlgraphics/fop/trunk/src/java/org/apache/fop/accessibility/
>> How was I supposed to know that those files needed to be modified? Where
>> is the documentation for that? I took the FOValidationEventProducer
>> interface as a model and it didn’t have that EventModelFactory
>> sub-class. And when I tested my change by crafting an input file that
>> would trigger the event I didn’t get that IllegalStateException. I just
>> got the error message relating to the event as expected. The reason why
>> still is a mystery for me.
>> Vincent
> Jeremias Maerki

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