java - Eclipse 4 RCP 没有将对象注入(inject)到我的类中

Question

我正在尝试将一个对象注入(inject)到我自己的类 (OpenProjectItemHandler) 中，如下上下文所示。但注入(inject)的对象 (eventBroker) 为 null。我们如何注入(inject)对象？

public class ProjectExplorerPart {

    protected TreeViewer viewer;

    //@Inject IEventBroker eventBroker;

    @PostConstruct
    public void createComposite(Composite parent) {
        //...
        viewer.addDoubleClickListener(new OpenProjectItemHandler());

        //...
    }
}


public class OpenProjectItemHandler implements IDoubleClickListener {

    @Inject IEventBroker eventBroker;

    @Override
    public void doubleClick(DoubleClickEvent event) {
            //...
            //IEclipseContext eclipseContext = E4Workbench.getServiceContext();
            //eventBroker = eclipseContext.get(IEventBroker.class);
            eventBroker.send("ta/project_explorer/open_item", Collections.EMPTY_LIST);
        }
    }
}

Answer 1

使用new创建的对象不会被注入(inject)。您需要使用 ContextInjectionFactory.make 来创建对象。

public class ProjectExplorerPart {

  protected TreeViewer viewer;

  @PostConstruct
  public void createComposite(Composite parent, IEclipseContext context) {
    //...

    OpenProjectItemHandler handler
        = ContextInjectionFactory.make(OpenProjectItemHandler.class, context);

    viewer.addDoubleClickListener(handler);

    //...
  }
}