AssistedInject is what you want.
On Feb 20, 2010 7:04 AM, "Tatchan" <[email protected]> wrote:
I'm using Guice for the first time and find no convenient way to pass
an existing object as parameter of a constructor:
interface House {
PowerSupply getPowerSupply();
WaterSupply getWaterSupply();
// More common utilities...
}
interface Lamp {
void light();
}
class LampImpl implements Lamp {
private final House house;
public Lamp(House house) {
this.house = house;
}
public void light() {
PowerSupply power = house.getPowerSupply();
// Light the lamp;
}
}
class RoomImpl {
private final House house;
private Vector<Lamp> lamps;
public Room(House house) {
this.house = house;
}
void clean() {
WaterSupply water = house.getWaterSupply();
// clean the room
}
void addLamp() {
Lamp lamp = new LampImpl(house);
lamps.add(lamp);
}
}
class Kitchen {
// Similar to Room
}
The idea is: we have rooms and kitchens and lamps who need common
utilities supplied by the containing house.
The question is: How do I apply Guice to create lamps inside a room?
How can I do something like: Lamp lamp =
injector.getInstance(Lamp.class, house) ?
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