Maybe I misunderstand but simply passing arguments to the MyCarModule
constructor and then using the values in the bindings works fine:
public class Test {
public static void main(String[] args) {
// Get userinput. Path to xml frame.
int userInt = Integer.parseInt(args[0]);
Injector injector = Guice.createInjector(new MyCarModule
(userInt));
...
}
public class MyCarModule extends AbstractModule {
private int tt;
public MyCarModule(int tt) {
this.tt = tt;
System.out.println(tt);
}
prints 42 when this is passed as userinput.
next 'tt' can be used in
bind(String.class).annotatedWith(Names.named
("LicenseKey")).toInstance(tt);
But instead of passing resources in the Module constructor an
alternative is to call a "readInput()" method from the "configure()"
method in the module:
@Override
protected void configure() {
readUserInput();
}
private void readUserInput() {
// read the input using eg. swing.
}
This is how I currently solve the userinput problem.
On Jan 15, 9:52 am, Gary Pampara <[email protected]> wrote:
> This is possible but Guice by default cannot do that, unless the
> integer is named, as Fred described.
>
> You could possibly do one of the following:
> - Using a builder to create the instance for you (there are some
> examples on the list that I cannot seem to locate now)
> - You could consider using the AssistedInject extension
> (http://google-guice.googlecode.com/svn/trunk/javadoc/com/google/injec...)
>
> - Gary
>
> On Fri, Jan 15, 2010 at 10:42 AM, motes <[email protected]> wrote:
> > My plan was to let the user specify the int at runtime and then pass
> > it to the module like:
>
> > public class Test {
>
> > public static void main(String[] args) {
> > // Get userinput. Path to xml frame.
> > int userInt = Integer.parseInt(args[0]);
> > Injector injector = Guice.createInjector(new MyCarModule
> > (userInt));
> > CarShop carShop = injector.getInstance(CarShop.class);
> > }
> > }
>
> > Then in the module I can do:
>
> > public class MyCarModule extends AbstractModule {
> > private int tt;
> > public MyCarModule(int tt) {
> > this.tt = tt;
> > }
>
> > �...@override
> > protected void configure() {
>
> > bind(Automobile.class).to(Ford.class);
> > bind(String.class).annotatedWith(Names.named
> > ("LicenseKey")).toInstance(tt);
>
> > But is it this how guice is intented to be used (passing external
> > resources to the module constructor)?
>
> > On Jan 14, 11:37 pm, Fred Faber <[email protected]> wrote:
> >> Where is the value of the int coming from?
>
> >> If it's known at configure() time, then simply bind it:
>
> >> bind(int.class).toInstance(60);
>
> >> most likely you'll need to annotate it:
>
> >> class Ford implements Automobile {
>
> >> @Retention(RetentionPolicy.RUNTIME)
> >> @Target(ElementType.PARAMETER)
> >> @BindingAnnotation
> >> @interface ForFord { }
>
> >> �...@inject
> >> Ford(@ForFor int maxSpeed) {
> >> ...
> >> }
> >> }
>
> >> at which point you can use the type converters in guice to do:
>
> >> bindConstant().annotatedWith(ForFord.class).to(65);
>
> >> -Fred
>
> >> On Thu, Jan 14, 2010 at 4:56 PM, motes <[email protected]> wrote:
> >> > I have this simple class:
>
> >> > public class Ford implements Automobile {
> >> > private int maxSpeed;
>
> >> > public Ford(int speed) {
> >> > System.out.println("Driving a Ford!");
> >> > this.maxSpeed = speed;
> >> > }
>
> >> > �...@override
> >> > public int getMaxSpeed() {
> >> > return maxSpeed;
> >> > }
>
> >> > public void printBrand(){
> >> > System.out.println("Ford");
>
> >> > }
> >> > }
>
> >> > I would like to inject this implementation into the CarShop below:
>
> >> > public class CarShop {
> >> > private Automobile car;
> >> > �...@inject
> >> > public CarShop(Automobile car) {
> >> > this.car = car;
> >> > }
>
> >> > public void printBrand(){
> >> > car.printBrand();
> >> > }
>
> >> > public void printMaxSpeed(){
> >> > car.getMaxSpeed();
> >> > }
> >> > }
>
> >> > In my Module I do:
>
> >> > public class MyCarModule extends AbstractModule {
> >> > �...@override
> >> > protected void configure() {
> >> > bind(Automobile.class).to(Ford.class);
> >> > }
> >> > }
>
> >> > But how do I get the int passed to the constructor in my Ford
> >> > implementation?
>
> >> > I have looked at:
>
> >> >http://code.google.com/docreader/#p=google-guice&s=google-guice&t=Fre...
>
> >> > but it seems pretty overkill to create a factory or an AssistedInject
> >> > to pass an int to a constructor.
>
> >> > Any ideas?
>
> >> > --
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>
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