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Here's a simplified version of my needs. I have a program where every B object has its own C and D object, injected through Guice. In addition an A object is injected into every C and D objects. What I want : that for each B object, its C and D objects will be injected with the same A object. [Edit-Start] (1) Guice supports "singleton" and "prototype" modes. However, what I need is something in between: I need A to be singleton WRT to a given B object (so that the C and D injected into a B object will share an A object). For another B object, I want another A. So it's a singleton but for a limited scope of the program (actually, a limited scope of a data structure). (2) I don't mind a solution that uses method (setter)- or field- injection. (3) I tried, several times, to achieve this and it always felt that I only need to implement some custom thingy of the DI container to make this work - but it never worked. Thus, I am looking for a detailed solution (not just "hand waving") [Edit-End] Specifically, I want the output of the program (below) to be: Created C0 with [A0] Created D0 with [A0] Created B0 with [C0, D0] Created C1 with [A1] Created D1 with [A1] Created B1 with [C1, D1] Where it currently produces the following output: Created C0 with [A0] Created D0 with [A1] <-- Should be A0 Created B0 with [C0, D0] Created C1 with [A2] <-- Should be A1 Created D1 with [A3] <-- Should be A1 Created B1 with [C1, D1] I am expecting DI containers to allow this kind of customization but so far I had no luck in finding a solution. Below is my Guice-based code, but a Spring-based (or other DI containers-based) solution is welcome. import java.util.Arrays; import com.google.inject.*; public class Main { public static class Super { private static Map<Cla

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