[news.eclipse.tools.emf] Re: [newbie qns] reflection and class impl

[Tom Schindl <tom.schindl@xxxxxxxxxxxxxxx>]

Alex schrieb:
> Hi,
>
> 1. is it possible to create an EClass through reflection? e.g. I have a 
> class name as a string ("MyEClass"). Now I would like to create this 
> class with the factory. The factory has a method "EObject create(EClass 
> arg0)" but I don't know how to get the EClass from the string.
>
> 2. all our code is in a package seperated from the auto generated 
> packages. If I define an operation in the ecore model (e.g. operation 
> "myOperation" on the class "MyEClass") then I'm supposed to implement 
> the method in the generated class "MyEClassImpl". But I would like to 
> implement the operation in an own class (different package). Therefor I 
> could extend the class "MyEClassImpl" but if I create this class through 
> the factory then an object of type "MyEClassImpl" would be instantiated 
> instead of my own implemention. Is there a good solution for this?
>
> thanks a lot,
> Alex

I don't know if this the right thing but in my code (used to instantiate 
classes for iBatis) I do something like this (I think it was Ed's 
suggestion in a thread):

> ((ExtendedSqlMapClient) sqlMap).getDelegate()
> 					.setResultObjectFactory(new ResultObjectFactory() {
>
> 						@SuppressWarnings("unchecked")
> 						public Object createInstance(String arg0, Class arg1)
> 								throws InstantiationException,
> 								IllegalAccessException {
>
> 							for (EClassifier cf : ingeniumPackage.eINSTANCE.getEClassifiers()) {
> 								if (cf.getInstanceClass() == arg1) {
> 									return EcoreUtil.create((EClass) cf);
> 								}
> 							}
> 							return null;
> 						}
>
> 						public void setProperty(String arg0, String arg1) {
> 						}
>
> 					});

I have a class but you could easily exchange this with:

cf.getInstanceClass().getName().equals("MyEClass").

Tom

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Tom Schindl                                          JFace-Committer
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