RequestFactory：代理实现与泛型的接口 [英] RequestFactory: Proxy implementing interface with generics

问题描述

我正在努力处理请求和泛型。
在下面的代码中，代理方法与实体方法完全匹配，但是我得到了日志跟踪：

  java.lang.NullPointerException：null 
 at com.google.web.bindery.autobean.vm.impl.MethodPropertyContext.traverse（MethodPropertyContext.java:102）〜[gwt-servlet-2.6.0.jar：na ] 
 at com.google.web.bindery.autobean.vm.impl.MethodPropertyContext.accept（MethodPropertyContext.java:75）〜[gwt-servlet-2.6.0.jar：na] 
 at com 。com.google.web上的.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl $ PropertyCoderCreator.maybeCreateCoder（AutoBeanCodexImpl.java:353）〜[gwt-servlet-2.6.0.jar：na] 
。通过com.google.web.bindery.autobean.vm获取bindery.autobean.shared.impl.AutoBeanCodexImpl $ PropertyCoderCreator.visitReferenceProperty（AutoBeanCodexImpl.java:341）〜[gwt-servlet-2.6.0.jar：na] 
 .impl.ProxyAutoBean.traverseProperties（ProxyAutoBean.java:324）〜[gwt-servlet-2.6.0.jar：na] 
 at com.google.web.bindery.autobean.shared.impl.Abstr actAutoBean.traverse（AbstractAutoBean.java:166）〜[gwt-servlet-2.6.0.jar：na] 
 ... 
  

我的代理类：

  @ProxyFor（value = OutilLibre.class，locator = OutilLibreLocator .class）
 public interface OutilLibreProxy extends ProxyWithId，ProxyWithCartoLibre< OutilProxy>，EntityProxy {
 
 public Long getId（）; 
 
 public void setId（Long id）; 
 
 @Override 
 OutilProxy getCompetence（）; 
 
 @Override 
 void setCompetence（OutilProxy outil）; 
 
 @Override 
 String getCompetenceAutre（）; 
 
 @Override 
 void setCompetenceAutre（String competence）; 
 
 $ b $ / code> 

与泛型的接口：



  public interface ProxyWithCartoLibre< T> {
 
 getCompetence（）; 
 
 void setCompetence（T competence）; 
 
 String getCompetenceAutre（）; 
 
 void setCompetenceAutre（String competence）; 
 
 
 
 
 $ b $ p 
 $ p 
相应的服务器实体：
 
 
  @Entity 
 @Table（name =outil_libre）
 public class OutilLibre extends AEntityLongId implements IBeanCartoLibre< Outil> ;, IUniqueVersionEntity {
 
 private static final long serialVersionUID = 45107725880220830L; 
 
 @Id 
 @GeneratedValue（strategy = GenerationType.AUTO，generator =outil_libre_seq_gen）
 @SequenceGenerator（name =outil_libre_seq_gen，sequenceName =seq_outil_libre）
 @Column（name =id，unique = true，nullable = false，precision = 5，scale = 0）
 private长ID; 
 $ b $ @Cascade（value = {org.hibernate.annotations.CascadeType.SAVE_UPDATE}）
 @ManyToOne（fetch = FetchType.LAZY）
 @JoinColumn（name =outil ，nullable = false）
 private Outil outil; 
 
 @Column（name =outil_autre）
 private String outilAutre; 
 
 @Override 
 public Long getId（）{
 return id; 
} 
 
 @Override 
 public void setId（Long id）{
 this.id = id; 
} 
 
 @Override 
 public Outil getCompetence（）{
 return outil; 
} 
 
 @Override 
 public void setCompetence（Outil outil）{
 this.outil = outil; 
} 
 
 @Override 
 public String getCompetenceAutre（）{
 return outilAutre; 
} 
 
 @Override 
 public void setCompetenceAutre（String competence）{
 this.outilAutre = competence; 
} 
 
} 
  
我不知道为什么我得到这个错误是因为ProxyWithCartoLibre接口只是被客户端类使用，并没有任何目的来定义requestfactory。  
 
 
有没有办法告诉GWT生成器排除ProxyWithCartoLibre接口？  
 
 
预先感谢。  
 
 
 编辑  
 
 
  java.lang .NullPointerException：null 
 at com.google.web.bindery.autobean.vm.impl.MethodPropertyContext.traverse（MethodPropertyContext.java:102）〜[gwt-servlet.jar：na] 
 at com。 google.web.bindery.autobean.vm.impl.MethodPropertyContext.accept（MethodPropertyContext.java:75）〜[gwt-servlet.jar：na] 
，位于com.google.web.bindery.autobean.shared.impl .AutoBeanCodexImpl $ PropertyCoderCreator.maybeCreateCoder（AutoBeanCodexImpl.java:353）〜[gwt-servlet.jar：na] 
 at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl $ PropertyCoderCreator.visitReferenceProperty（AutoBeanCodexImpl。 java：341）〜[gwt-servlet.jar：na] 
 at com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.traverseProperties（ProxyAutoBean.java:324）〜[gwt-servlet.jar ：na] 
 at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.traverse（AbstractAutoBean.java:166）〜[gwt-servlet.jar：na] 
 at com.google 。我们b.bindery.autobean.shared.impl.AbstractAutoBean.accept（AbstractAutoBean.java:101）〜[gwt-servlet.jar：na] 
 at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl .doCoderFor（AutoBeanCodexImpl.java:522）〜[gwt-servlet.jar：na] 
 at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.setProperty（AbstractAutoBean.java:276）〜[ gwt-servlet.jar：na] 
，位于com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.setProperty（ProxyAutoBean.java:253）〜[gwt-servlet.jar：na] 
，位于com.google.web.bindery.autobean.vm.impl.BeanPropertyContext.set（BeanPropertyContext.java:44）〜[gwt-servlet.jar：na] 
，位于com.google.web.bindery.requestfactory .server.Resolver $ PropertyResolver.visitValueProperty（Resolver.java:211）〜[gwt-servlet.jar：na] 
 at com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.traverseProperties（ProxyAutoBean。 java：289）〜[gwt-servlet.jar：na] 
 at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.traverse（AbstractAutoB ean.java:166）〜[gwt-servlet.jar：na] 
 at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.accept（AbstractAutoBean.java:101）〜[gwt-servlet .jar：na] 
在com.google.web.bindery.requestfactory.server.Resolver.resolveClientValue（Resolver.java:470）〜[gwt-servlet.jar：na] 
在com.google .web.bindery.requestfactory.server.SimpleRequestProcessor.processInvocationMessages（SimpleRequestProcessor.java:491）〜[gwt-servlet.jar：na] 
 at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process（ SimpleRequestProcessor.java:233）〜[gwt-servlet.jar：na] 
 at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process（SimpleRequestProcessor.java:135）〜[gwt-servlet.jar ：na] 
 at com.google.web.bindery.requestfactory.server.RequestFactoryServlet.doPost（RequestFactoryServlet.java:133）〜[gwt-servlet.jar：na] 
 at javax.servlet.http .HttpServlet.service（HttpServlet.java:647）[servlet-api.jar：na] 
在javax.se rvlet.http.HttpServlet.service（HttpServlet.java:728）[servlet-api.jar：na] 
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:305）[catalina.jar ：7.0.39.B] 
 at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）[catalina.jar：7.0.39.B] 
 at ch.qos。 logback.access.servlet.TeeFilter.doFilter（TeeFilter.java:55）[logback-access-1.0.13.jar：na] 
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java： 243）[catalina.jar：7.0.39.B] 
 at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）[catalina.jar：7.0.39.B] 
在org.springframework上的org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal（OpenEntityManagerInViewFilter.java:180）[spring-orm-3.2.4.RELEASE.jar：3.2.4.RELEASE] 
。 web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）[spr ing-web-3.2.2.RELEASE.jar：3.2.2.RELEASE] 
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）[catalina.jar：7.0.39。 B] 
 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）[catalina.jar：7.0.39.B] 
 at org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:330）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.access.intercept.FilterSecurityInterceptor .invoke（FilterSecurityInterceptor.java:118）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter （FilterSecurityInterceptor.java:84）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java ：342）[spring-security-web-3.1.4.RELEASE .jar：3.1.4.RELEASE] 
 at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter（ExceptionTranslationFilter.java:113）[spring-security-web-3.1.4.RELEASE.jar：3.1 .4.RELEASE] 
 at org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE ] 
在org.springframework.security.web.session.SessionManagementFilter.doFilter（SessionManagementFilter.java:103）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org。 springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter（AnonymousAuthenticationFilter.java:113）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
在org.springframework.security。 web.FilterChainProxy $ VirtualFilterChain.doFil ter（FilterChainProxy.java:342）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter（ RememberMeAuthenticationFilter.java:146）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java： 342）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
在org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter（SecurityContextHolderAwareRequestFilter.java:54）[spring -security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）[spring-security-web -3.1.4.RELEASE.jar：3.1.4.RELEASE] 
在org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter（RequestCacheAwareFilter.java:45）[spring-security-web-3.1.4的.rel EASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）[spring-security-web-3.1.4.RELEASE.jar：在Spring中，你可以使用spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
在org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter（AbstractAuthenticationProcessingFilter.java:183）发布] 
在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter（AbstractAuthenticationProcessingFilter.java:183）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org .springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.sec urity.web.authentication.logout.LogoutFilter.doFilter（LogoutFilter.java:105）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
在org.springframework.security。 web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
在org.springframework.security.web.context。 SecurityContextPersistenceFilter.doFilter（SecurityContextPersistenceFilter.java:87）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（ FilterChainProxy.java:342）[spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.FilterChainProxy.doFilterInternal（FilterChainProxy.java:192） [spring-security-web-3.1.4.RELEASE.jar：3.1.4.RELEASE] 
 at org.springframework.security.web.FilterChainProxy.doFilter（FilterChainProxy.java:160）[spring-security-web -3.1.4.RELEASE.jar：3.1.4.RELEASE] 
在org.sp ringframework.web.filter.DelegatingFilterProxy.invokeDelegate（DelegatingFilterProxy.java:346）[spring-web-3.2.2.RELEASE.jar：3.2.2.RELEASE] 
 at org.springframework.web.filter.DelegatingFilterProxy。 doFilter（DelegatingFilterProxy.java:259）[spring-web-3.2.2.RELEASE.jar：3.2.2.RELEASE] 
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243） [catalina.jar：7.0.39.B] 
 at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）[catalina.jar：7.0.39.B] 
 at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter.java:88）[spring-web-3.2.2.RELEASE.jar：3.2.2.RELEASE] 
 at org.springframework.web.filter。 OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）[spring-web-3.2.2.RELEASE.jar：3.2.2.RELEASE] 
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java： 243）[catalina.jar：7.0.39.B] 
 at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）[catalina.jar：7.0.39.B] 
 at org.apache.catalina.core.StandardWrapperValve.invoke （StandardWrapperValve.java:222）[catalina.jar：7.0.39.B] 
 at org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:123）[catalina.jar：7.0.39。 B] 
 at org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:472）[catalina.jar：7.0.39.B] 
 at org.apache.catalina.core.StandardHostValve .invoke（StandardHostValve.java:171）[catalina.jar：7.0.39.B] 
 at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:99）[catalina.jar：7.0。 39.B] 
 at org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.java:947）[catalina.jar：7.0.39.B] 
 at org.apache.catalina.core .StandardEngineValve.invoke（StandardEngineValve.java:118）[catalina.jar：7.0.39.B] 
 at org.apache.catalina.connector.Coyo teAdapter.service（CoyoteAdapter.java:408）[catalina.jar：7.0.39.B] 
 at org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1009）[tomcat-coyote.jar ：7.0.39.B] 
 at org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:589）[tomcat-coyote.jar：7.0.39.B] 
 at org。 $ java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor。）
。 java：1145）[na：1.7.0_60] 
在java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:615）[na：1.7.0_60] 
 at java.lang。 Thread.run（Thread.java:745）[na：1.7.0_60] 
  
 
 
解决方案我也有这个异常，并尝试了很多，并提出了以下解决方法： 
 
 
 
 
 
 build a 基本的底层bean / POJO模型，用于您的类别avoidin g泛型（在最外面的类中，使用泛型似乎不成问题），也许使用 _ 等一些标记字符串来帮助避免（通过乐观的 interface 用法）稍后使用不需要的类/方法或提供所需的变体，例如： 
 
 
  interface _Person< PERSON扩展了_Person< PERSON> >如果_Person不是
 //在AutoBean（de）序列化中引用它本身，则扩展IsSerializable {
 //泛型：仅用于显示泛型工作
 int getId（）; 
 void setId（int id）; //通常我们可能不想公开这个，但是对于
 //（de）序列化，它可能是必需的或有利的
 //现在在这里
 String getName（）; 
 void setName（String name）; 
 // _ Person setName_（String name）; 
 //有流利的setter对Bean的定义并且
 //不能与AutoBeans一起使用，但由于没有getter 
 //getName（），所以它被忽略并且可以工作:-) 
 //（但最好不要包含在这里）
 _Address getAddr_（）; 
 void setAddr_（_Address addr）; 
} 
 
 // interface _Address< ADDR扩展_Address>扩展了IsSerializable {
 // =>例如，导致NullPointerException！ :-( 
 // com.google.web.bindery.autobean.vm.impl.MethodPropertyContext.traverse（
 // MethodPropertyContext.java:102）〜[gwt-user-2.6.0。 jar：na] 
 interface _Address extends IsSerializable {
 String getCity_（）; 
 void setCity_（String city）; 
} 
  
 
 
 
 
 
现在在 AutoBean 功能中使用这个功能将适用于这些功能，并且如果使用通用接口和实现这些后来应该工作（我只尝试过这样一个简单的例子来测试它）
上面的例子应该工作（不完整的片段）： AutoBeanCodex.encode（personAutoBean）.deepCopy（ ） 
 
 
 
 
 
 
现在创建通用接口和继承它们的类将具有缺点例如不可以 
  
 
 
 
 
返回一个通用的个人。 getAddr _（）。getNonBeanFooExtension（）或
 
 
利用流畅 person.setName_（foo）.setMail（bar）或
 
 
等界面阻止/阻止访问 person.setId（123） 
 
 
 
 
 
因此我正在计划当它完成时）从这些被派生出来，但也是编写继承不相关/重叠的接口，它们/应该在整个业务应用程序中正常使用，例如：
  interface Person< PERSON扩展了Person< PERSON>> {
 // extends _Person< = no，因为那样我们就无法隐藏/阻止拨打
 //例如setId（....）
 int getId（）; 
 
 String getName（）; 
 // void setName（String name）; //我们可以提供它，但setName_（）做同样的
 //和更多，只有一个setter保持接口
 //更小
 PERSON setName_（String name）; 
地址< PERSON> getAddr（）; 
 PERSON setAddr（地址< PERSON> addr）; 
 
 PERSON setFancyThing（）; //未被AutoBean看到，因此不应该
 //在那里引起麻烦
} 
 
 interface Address< PERSON扩展Person< PERSON> > {
 ... 
} 
  
 
 
 
 
应该一般工作（现在只测试简单情况）：
 
 
  class PersonDTO implements Person< PersonDTO> ;, _Person< PersonDTO> {
 ... 
} 
  
 
 
 
 
 这些实现的用户应该尽可能地使用来自2.  Person&PersonDto>的接口。 pers = ...  ，以便他们看到一些相当不错的人物界面，不能轻松调用  pers.setId（ 123），但 pers.setName_（Dimitri Khalezov）.setMail_（...）  
 
 
 
这已经是一个很长的帖子，我希望你可以想象在不同地点缺少的细节。
 
I am struggling with requestfactories and generics.
In the code below, the proxy methods are matching exactly with the entity methods, but I get the log trace:
java.lang.NullPointerException: null
    at com.google.web.bindery.autobean.vm.impl.MethodPropertyContext.traverse(MethodPropertyContext.java:102) ~[gwt-servlet-2.6.0.jar:na]
    at com.google.web.bindery.autobean.vm.impl.MethodPropertyContext.accept(MethodPropertyContext.java:75) ~[gwt-servlet-2.6.0.jar:na]
    at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl$PropertyCoderCreator.maybeCreateCoder(AutoBeanCodexImpl.java:353) ~[gwt-servlet-2.6.0.jar:na]
    at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl$PropertyCoderCreator.visitReferenceProperty(AutoBeanCodexImpl.java:341) ~[gwt-servlet-2.6.0.jar:na]
    at com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.traverseProperties(ProxyAutoBean.java:324) ~[gwt-servlet-2.6.0.jar:na]
    at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.traverse(AbstractAutoBean.java:166) ~[gwt-servlet-2.6.0.jar:na]
...
My proxy class:    
@ProxyFor(value = OutilLibre.class, locator = OutilLibreLocator.class)
public interface OutilLibreProxy extends ProxyWithId, ProxyWithCartoLibre<OutilProxy>, EntityProxy {

    public Long getId();

    public void setId(Long id);

    @Override
    OutilProxy getCompetence();

    @Override
    void setCompetence(OutilProxy outil);

    @Override
    String getCompetenceAutre();

    @Override
    void setCompetenceAutre(String competence);

}
The interface with generics:
public interface ProxyWithCartoLibre<T> {

    T getCompetence();

    void setCompetence(T competence);

    String getCompetenceAutre();

    void setCompetenceAutre(String competence);

}   
The corresponding server entity:
@Entity
@Table(name = "outil_libre")
public class OutilLibre extends AEntityLongId implements IBeanCartoLibre<Outil>, IUniqueVersionEntity {

    private static final long serialVersionUID = 45107725880220830L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO, generator = "outil_libre_seq_gen")
    @SequenceGenerator(name = "outil_libre_seq_gen", sequenceName = "seq_outil_libre")
    @Column(name = "id", unique = true, nullable = false, precision = 5, scale = 0)
    private Long id;

    @Cascade(value = {org.hibernate.annotations.CascadeType.SAVE_UPDATE})
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "outil", nullable = false)
    private Outil outil;

    @Column(name = "outil_autre")
    private String outilAutre;

    @Override
    public Long getId() {
        return id;
    }

    @Override
    public void setId(Long id) {
        this.id = id;
    }

    @Override
    public Outil getCompetence() {
        return outil;
    }

    @Override
    public void setCompetence(Outil outil) {
        this.outil = outil;
    }

    @Override
    public String getCompetenceAutre() {
        return outilAutre;
    }

    @Override
    public void setCompetenceAutre(String competence) {
        this.outilAutre = competence;
    }

}   
I don't know why I get this error because the ProxyWithCartoLibre interface is just used by client side classes and hasn't any purpose in defining the requestfactory.  

Is there a way to tell the GWT generator to exclude the ProxyWithCartoLibre interface?  

Thanks in advance.  

EDIT
java.lang.NullPointerException: null
     at com.google.web.bindery.autobean.vm.impl.MethodPropertyContext.traverse(MethodPropertyContext.java:102) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.vm.impl.MethodPropertyContext.accept(MethodPropertyContext.java:75) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl$PropertyCoderCreator.maybeCreateCoder(AutoBeanCodexImpl.java:353) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl$PropertyCoderCreator.visitReferenceProperty(AutoBeanCodexImpl.java:341) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.traverseProperties(ProxyAutoBean.java:324) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.traverse(AbstractAutoBean.java:166) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.accept(AbstractAutoBean.java:101) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl.doCoderFor(AutoBeanCodexImpl.java:522) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.setProperty(AbstractAutoBean.java:276) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.setProperty(ProxyAutoBean.java:253) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.vm.impl.BeanPropertyContext.set(BeanPropertyContext.java:44) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.requestfactory.server.Resolver$PropertyResolver.visitValueProperty(Resolver.java:211) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.traverseProperties(ProxyAutoBean.java:289) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.traverse(AbstractAutoBean.java:166) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.accept(AbstractAutoBean.java:101) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.requestfactory.server.Resolver.resolveClientValue(Resolver.java:470) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.processInvocationMessages(SimpleRequestProcessor.java:491) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:233) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:135) ~[gwt-servlet.jar:na]
     at com.google.web.bindery.requestfactory.server.RequestFactoryServlet.doPost(RequestFactoryServlet.java:133) ~[gwt-servlet.jar:na]
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:647) [servlet-api.jar:na]
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) [servlet-api.jar:na]
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) [catalina.jar:7.0.39.B]
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.39.B]
     at ch.qos.logback.access.servlet.TeeFilter.doFilter(TeeFilter.java:55) [logback-access-1.0.13.jar:na]
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) [catalina.jar:7.0.39.B]
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.39.B]
     at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:180) [spring-orm-3.2.4.RELEASE.jar:3.2.4.RELEASE]
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-3.2.2.RELEASE.jar:3.2.2.RELEASE]
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) [catalina.jar:7.0.39.B]
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.39.B]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:146) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) [spring-security-web-3.1.4.RELEASE.jar:3.1.4.RELEASE]
     at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) [spring-web-3.2.2.RELEASE.jar:3.2.2.RELEASE]
     at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259) [spring-web-3.2.2.RELEASE.jar:3.2.2.RELEASE]
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) [catalina.jar:7.0.39.B]
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.39.B]
     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) [spring-web-3.2.2.RELEASE.jar:3.2.2.RELEASE]
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-3.2.2.RELEASE.jar:3.2.2.RELEASE]
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) [catalina.jar:7.0.39.B]
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.39.B]
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) [catalina.jar:7.0.39.B]
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) [catalina.jar:7.0.39.B]
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) [catalina.jar:7.0.39.B]
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) [catalina.jar:7.0.39.B]
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) [catalina.jar:7.0.39.B]
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947) [catalina.jar:7.0.39.B]
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) [catalina.jar:7.0.39.B]
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) [catalina.jar:7.0.39.B]
     at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009) [tomcat-coyote.jar:7.0.39.B]
     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) [tomcat-coyote.jar:7.0.39.B]
     at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) [tomcat-coyote.jar:7.0.39.B]
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_60]
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_60]
     at java.lang.Thread.run(Thread.java:745) [na:1.7.0_60]

解决方案
I also got this exception and tried a lot and came up with the following workaround:

build a basic "underlying" bean/POJO model for your classes avoiding generics (in the outmost class, using generics does not seem to be a problem) and maybe using some "marker strings" like _ to help avoiding (via "optimistic" interface usage) later usage of "undesired classes/methods" or provide desired variants, e.g.:
interface _Person< PERSON extends _Person<PERSON> > extends IsSerializable {  
                   // generics here: just to show that generics work if _Person is not 
                   // referenced itself in AutoBean (de)serialization
  int getId();
  void setId( int id );     // normally we may not want to expose this, but for the
                            // (de)serialization it is/may be necessary or benefitial 
                            // here now
  String getName();
  void setName( String name );
  //_Person setName_( String name );
                        // to have fluent setters is against Bean definition and does 
                        // not work with AutoBeans, but since there is no getter
                        // "getName()" it is ignored and would work :-)
                        // (but it may be better to not include it in here)
  _Address getAddr_();
  void setAddr_( _Address addr );
}

//interface _Address< ADDR extends _Address > extends IsSerializable {
  // => would e.g. cause the NullPointerException ! :-(
  //    at com.google.web.bindery.autobean.vm.impl.MethodPropertyContext.traverse(
  //         MethodPropertyContext.java:102) ~[gwt-user-2.6.0.jar:na]
interface _Address extends IsSerializable {
   String getCity_();
   void setCity_( String city );
}



now using this with AutoBean functionality will work on those and if one uses generic interfaces and implementations around these later on should work (I tried only a simple example like this to test it for me).
Example with above should work (incomplete snippet): AutoBeanCodex.encode( personAutoBean ).deepCopy()

now creating generic interfaces and classes inheriting from those would have the disadvantage of e.g. not beeing able to 


return a generic person.getAddr_().getNonBeanFooExtension() or 
utilize a fluent interface like person.setName_( "foo" ).setMail( "bar" ) or
preventing/discourage access to person.setId( 123 )


Therefore I am planning now (I'll report back when it's done) to derive from these beens nevertheless, but also writing "inheritance unrelated"/overlapping interfaces, that are/should be "normally" used throughout the business application, e.g.:
interface Person< PERSON extends Person<PERSON>> {
   // extends _Person <= no, because then we could not "hide/discourage" users calling 
   // e.g. "setId(....)"
  int getId();

  String getName();
  //void setName( String name );  // we could provide it, but setName_() does the same
                                  // and more and only one setter keeps the interface 
                                  // smaller
  PERSON setName_( String name );
  Address<PERSON> getAddr();
  PERSON setAddr( Address<PERSON> addr );

  PERSON setFancyThing();          // not "seen" by AutoBean and thus should not 
                                   // cause trouble there
}

interface Address< PERSON extends Person<PERSON> > {
  ...
}

now implementing classes like this should work in general (only tested simple case for now):
class PersonDTO implements Person<PersonDTO>, _Person<PersonDTO> {
  ...
}

the "users" of those implementations should as much as possible work with the interfaces from 2. Person<PersonDto> pers = ... so they see some quite nice person interface and can't easily call pers.setId( 123 ), but pers.setName_( "Dimitri Khalezov" ).setMail_( ... )
It's already a long post and I hope you can imagine the missing details in various locations.

                        
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