java - 如何从仅在运行时已知的类型中获取 Dagger 实例

Question

我正在处理一个带有类型参数的注解。此类型参数用于实例化新对象。

使用 Google Guice，我会注入(inject)“注入(inject)器”本身并使用它来找到正确的实例。但是我对 Dagger 有点陌生，我没有在网上看到任何解决方案。我知道 ObjectGraph 可以给我一个实例。我/我可以注入(inject) ObjectGraph 本身吗？我该怎么做？

Answer 1

我设法做到了这一点。不知道好不好...

酒吧:

public class Bar {

    private ObjectGraph objectGraph;

    @Inject
    Bar(ObjectGraph objectGraph){

        this.objectGraph = objectGraph;
    }

    public ObjectGraph getObjectGraph() {
        return objectGraph;
    }
}

条形模块:

@Module(
        injects = Bar.class,
        complete = false
)
public class BarModule {
}

FooModule:

@Module(
        includes = BarModule.class,
        injects = ObjectGraph.class,
        complete = true,
        library = true
)
public class FooModule {

    private ObjectGraph objectGraph;

    public void setObjectGraph(ObjectGraph objectGraph){

        this.objectGraph = objectGraph;
    }

    @Provides @Singleton ObjectGraph providesObjectGraph(){
        return null;
    }
}

入口点:

public class EntryPoint {

    public static void main(String[] args){
        FooModule fooModule = new FooModule();
        ObjectGraph objectGraph = ObjectGraph.create(new BarModule(), fooModule);
        fooModule.setObjectGraph(objectGraph);

        System.out.println(objectGraph);

        Bar bar = objectGraph.get(Bar.class);
        ObjectGraph objectGraph1 = bar.getObjectGraph();

        System.out.println(objectGraph);
    }
}