Side note - I believe we have a change in the works to make Guice (and
specifically LinkedBindingBuilder) handle javax.inject.Provider bindings
natively. It got disrupted by holidays and other priorities, but in the
long run I don't think we'll need Providers.guicify() in client module
code.
But for now, Providers.guicify() is needed.
c.
On 15 Jan 2014, at 3:12, Stuart McCulloch wrote:
On 15 Jan 2014, at 08:41, Jochen Wiedmann <[email protected]>
wrote:
Thanks very much, but could someone help me by fixing the following
code (I hope the intention is clear):
private void bindList(Binder pBinder) {
final List<?> list = new ArrayList<Object>();
final Provider<O extends List> provider = new Provider<O>(){
public O get() {
return list;
}
};
pBinder.bind(List.class).toProvider((com.google.inject.Provider<?
extends List>) provider);
Does your provider implement com.google.inject.Provider? If it
doesn’t - for example, say it just implements javax.inject.Provider
- then you should use:
pBinder.bind(List.class).toProvider(Providers.guicify(provider));
BTW, if you don’t want to write lots of Provider classes then you
can also use @Provides methods in your module:
https://code.google.com/p/google-guice/wiki/ProvidesMethods
}
Additionally, is it possible to have something like
private <O> void bind(Binder pBinder, Class<O> pInterfaceClass,
O pImplementation) {
// ?
Sure:
pBinder.bind(pInterfaceClass).toInstance(pImplementation);
Note that this will automatically do field and setter injection of any
members annotated with @Inject in the instance - if you don’t want
this then use:
pBinder.bind(pInterfaceClass).toProvider(Providers.of(existingInstance));
You can find more binding examples at
http://google-guice.googlecode.com/git/javadoc/com/google/inject/Binder.html
and https://code.google.com/p/google-guice/wiki/Bindings
};
Jochen
On Friday, January 10, 2014 1:46:15 PM UTC+1, Stuart McCulloch wrote:
On 10 Jan 2014, at 11:58, Fred Faber <[email protected]> wrote:
binder.bind(IFoo.class).toProvider<https://google-guice.googlecode.com/git/javadoc/com/google/inject/binder/LinkedBindingBuilder.html#toProvider(com.google.inject.Provider<?
extends T>)>(myProvider) does this.
and if you have existing javax.inject.Provider instances you can use
Providers.guicify(myStandardProvider) to convert them to
com.google.inject.Provider
http://google-guice.googlecode.com/git/javadoc/com/google/inject/util/Providers.html
bind( IFoo.class ).toProvider( Providers.guicify(
myStandardProvider ) );
On Fri, Jan 10, 2014 at 4:50 AM, Jochen Wiedmann
<[email protected]>wrote:
Hi,
I am currently converting an existing application to Guice. To
simplify
the migartion, I'd like to do somehing like
Foo someInstance;
Provider<Foo> myProvider = new Provider<Foo>(){
Foo get() { return someInstance; }
}
binder.bind(IFoo.class).toProviderInstance(myProvider);
Is that possible?
Thanks,
Jochen
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