java - 带有 Guice 的通用类型提供程序

Question

我正在尝试将类型化对象注入(inject)服务类，但得到了

    com.google.inject.ConfigurationException: Guice configuration errors:

1) No implementation for com.bookpac.utils.appserver.ILookup<com.bookpac.server.common.IWS> was bound.
  while locating com.bookpac.utils.appserver.ILookup<com.bookpac.server.common.IWS>
    for parameter 0 at com.bookpac.server.LookupService.<init>(LookupService.java:13)
  while locating com.bookpac.server.LookupService

要注入(inject)的字段是ILookup<IWS> lookup ,绑定(bind)是 bind(ILookup.class).toProvider(LookupProvider.class)

当使用@Provides 注释时一切正常，有什么想法吗？

Answer 1

当你使用泛型类型时，你需要使用像这样的 TypeLiteral:

bind(new TypeLiteral<ILookup<IWS>>(){}).toProvider(LookupProvider.class);

来自documentation :

Java doesn't yet provide a way to represent generic types, so this class does.