Hi, I'm new to Guice and I'm trying to convert an existing application
to use guice. Most parts work quite fine, but for one problem I didn't
find a nice solution so far.
I created a little example that hopefully illustrates my problem. I
have a class that depends on a list of SpecialThings and a provider
that itself depends on the *currently active* SpecialThing, i.e., the
provider needs to know what SpecialThing is active when calling get()
because this affects its return value:
@Inject
public TestExample(final List<SpecialThing> specials, final
Provider<DependentOnSpecial> provider)
{
this.specials = specials;
this.provider = provider;
}
public void run()
{
for (final Special currentSpecial : specials)
{
final DependentOnSpecial dep = provider.get();
// provider.setSepcialThing(special); // ???
for (final String string : dep.elements())
{
System.out.println(string);
}
}
}
However, I think this is not the right way how to do it in Guice,
right? I thought about using my own scope but I don't didn't
understand how I can configure the scope with a particular instance of
SpecialThing. SpecialThing is itself not free of dependencies, i.e.,
it cannot be created using no-scope.
Sorry, I got lost in my dependencies somehow :-}
Summarized:
I have a singleton List<SpecialThings>.
I have Components that depend on the currently active, SpecialThing,
i.e., the Injector should inject this active instance to the
providers.
It sounds like needing a scope but how can I achieve this notion of
*active* SpecialThing from singleton list?
Thanks in Advance.
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