[news.eclipse.tools] Re: How can I pre-req an Optional plugin?

["Randy Hudson" <none@xxxxxxx>]

Actually, this would work perfectly, since we need just an Object.

 

This is very similar to the way the ContentOutline asks for a ContentOutlinePage.

Imagine that the ContentOutline itself were a view that you wished to ship ONLY

to ISVs developing in Eclipse, and not in the final product.  Therefore, you put that

View and its default page in its own plugin, which you provide to ISVs only.

 

class MyEditorPartInPluginB

    implements IAdaptable

{

...

public Object getAdapter(Class adapterKey){

 

    //The type constant was set previously using the method described previously

    if (adapterKey = TYPE_pageDefinedInPluginA) 

        return constructorForSaidType.newInstance(parameter1);

    //Ignoring possible exceptoins thrown.

    ...

}

...

}

 

 

 

"Thomas Mäder" <tmaeder0906@xxxxxxxx> wrote in message news:3B9FEFB4.B8F329A4@xxxxxxxx...

> I was wondering what you 
cast the newly created instance of "foo" to. If you
> don't have any 
compile time dependencies on "foo", it looks to me as if "foo"
> should 
actually plugin into an extension point that plugin B should define.
> 
Sorry Peter, but the classloader thing just looks a bit hacky.
> 
> 
Thomas
> 
> Peter Amhof wrote:
> 
> > I would do it 
like this:
> >
> > // first get plugin A by it's id (should be 
it's folder name?)
> > Plugin aPlugin= 
org.eclipse.core.runtime.Platform.getPlugin(String
> > 
pluginID);
> > if (aPlugin == null) return;     // 
plugin A not installed
> > ClassLoader loader= 
aPlugin.getDescriptor().getPluginClassLoader();
> > Class aClass= 
loader.loadClass(myClassName);
> >
> > mfg feser aka peter 
paul amhof
> >
> > "Randy Hudson" <none@xxxxxxx> schrieb im Newsbeitrag
> > news:9noceg$9om$1@xxxxxxxxxxxxx...
> > > How can I have Plugin B pre-req Plugin A, but also 
no care if Plugin A is
> > > not installed.  For example, we 
are trying to dynamically find a class by
> > > using 
Class.forName("foo") to see if a class from Plugin A is around.  If
> 
> it
> > > is, great, and we will then instantiate that class 
foo.  If not, we don't
> > > care.
> > >
> 
> > Currently Plugin B is getting deactiviated if Plugin A is not 
found.
> > >
> > >
>