All:
I implemented a simple change in ObjectConverterImpl. It solves the
problem I reported.
I added the following method:
protected Object newInstance(String className) {
return ReflectionUtils.newInstance(className);
}
Elsewhere in ObjectConverterImpl, it will now invoke
this.newInstance(classDescriptor.getClassName());
where previously the invocation had been
ReflectionUtils.newInstance(classDescriptor.getClassName());
Now I can over-ride the newInstance in MyObjectConverterImpl (which
subclasses ObjectConverterImpl). This allows me to construct objects
for my model using its factory class.
I will submit an enhancement Jira tomorrow to get this change into
ObjectConvertImpl.
-- Dan
Dan Connelly wrote:
All:
I do a pm.save on the root of my model objects. Then I want to fetch
the object model back using some code like:
RootClass root = (RootClass) pm.getObject("/test.root");
This fails because my model uses a factory class, not constructors, to
instantiate model objects, including instances of the RootClass.
This pm is constructed using my custom MyObjectConverterImpl, which is
a subclass of ObjectConverterImpl. I expected that this would give
me a way to control object creation. It seems that I was wrong
(unless I copy major portions of ObjectConverterImpl).
ObjectConverterImpl, if I delegate getObject to it, attempts to get a
root object using this code:
Object root =
ReflectionUtils.newInstance(classDescriptor.getClassName());
That causes the failure. ReflectionUtils is out of my control.
ObjectConverterImpl does not invoke *this.newInstance* so that
MyObjectConverterImpl can get control back for the construction in my
objects (using my factory class).
What are the plans, if any, are there to accommodate object models
which use a factory class for construction of its objects?
-- Dan
