JAXB和Guice:如何集成和可视化?

时间:2011-09-22 09:24:28

标签: java jaxb guice

我发现可以将JAXB与Guice一起使用,但是具有挑战性:两个库都“争夺”对象创建的控制权,你必须小心避免循环依赖,并且它可能会弄乱所有JAXB Adapters和Guice Providers和东西。我的问题是:

  • 您如何处理此配置?可采用哪些一般策略/经验法则?
  • 你能指点我一个好的教程或编写良好的示例代码吗?
  • 如何可视化依赖关系(包括AdaptersProviders)?

1 个答案:

答案 0 :(得分:4)

对于一些示例代码,这里完成了一些示例工作:http://jersey.576304.n2.nabble.com/Injecting-JAXBContextProvider-Contextprovider-lt-JAXBContext-gt-with-Guice-td5183058.html

在显示“错误?”的行中,输入推荐的行。

我看起来像这样:

@Provider 
public class JAXBContextResolver implements ContextResolver<JAXBContext> { 

    private JAXBContext context; 
    private Class[] types = { UserBasic.class, UserBasicInformation.class }; 

    public JAXBContextResolver() throws Exception { 
         this.context = 
       new JSONJAXBContext( 
         JSONConfiguration.natural().build(), types); 
     } 

    public JAXBContext getContext(Class<?> objectType) { 
        /* 
        for (Class type : types) { 
            if (type == objectType) { 
                return context; 
            } 
        } // There should be some kind of exception for the wrong type.
        */ 
        return context; 
    } 
} 

//My resource method: 

    @GET 
    @Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON}) 
    public JAXBElement<UserBasic> get(@QueryParam("userName") String userName) { 
        ObjectFactory ob = new ObjectFactory(); 
        UserDTO dto = getUserService().getByUsername(userName); 
        if(dto==null) throw new NotFoundException(); 
        UserBasic ub = new UserBasic(); 
        ub.setId(dto.getId()); 
        ub.setEmailAddress(dto.getEmailAddress()); 
        ub.setName(dto.getName()); 
        ub.setPhoneNumber(dto.getPhoneNumber()); 
        return ob.createUserBasic(ub); 
    } 

//My Guice configuration module: 

public class MyServletModule extends ServletModule { 


    public static Module[] getRequiredModules() { 
        return new Module[] { 
                new MyServletModule(), 
                new ServiceModule(), 
                new CaptchaModule() 
         }; 
    } 


    @Override 
    protected void configureServlets() { 
        bind(UserHttpResource.class); 
        bind(JAXBContextResolver.class);
        serve("/*").with(GuiceContainer.class); 
    } 
}