Gin, SingleInstanceProvider?

I writing over and over again the same code:

@Inject

public Provider<Foo> provider;

private Foo foo;

Foo assertFoo() {

    if (foo == null) {

        foo = provider.get();

    }

    return foo;

}

Basically I inject a provider to delay the object instantiation, but in most cases I only need one instance of the object.

Am I missing some built-in feature of gin? Is there any SingleInstanceProvider hidded out there? or any easier way of doing this?

Thanks

--
Guit: Elegant, beautiful, modular and *production ready* gwt applications.

http://code.google.com/p/guit/

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