Vraptor 3 e array bidimensional

Assuntos Gerais
#1

Olá Pessoal… estou com uma dúvida ao tentar implementar o seguinte problema…
Tenho um formulário que é dinamico mais ou meno igual a esse abaixo:

<form action="<c:url value="/resposta" />" method="post">
   Pergunta 1:
   <input type="radio" name="resposta[1][1]" value="1" />
   <input type="radio" name="resposta[1][1]" value="2" />
   <input type="radio" name="resposta[1][1]" value="3" />
   <input type="radio" name="resposta[1][1]" value="4" />
   <input type="radio" name="resposta[1][1]" value="5" />
   <br>

   Pergunta 2:
   <input type="radio" name="resposta[1][2]" value="1" />
   <input type="radio" name="resposta[1][2]" value="2" />
   <input type="radio" name="resposta[1][2]" value="3" />
   <input type="radio" name="resposta[1][2]" value="4" />
   <input type="radio" name="resposta[1][2]" value="5" />
   <br>

   <input type="submit" value="Enviar" />
</form>

ai tentei no controller implementar um método para recuperar esses valores

@Path("/resposta")
@Post
public void recebe(String[][] resposta) {
}

Porém da a exceção:

14/02/2010 11:38:09 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet default threw exception
java.lang.ArrayIndexOutOfBoundsException: 0
        at br.com.caelum.vraptor.http.asm.AsmBasedTypeCreator.typeFor(AsmBasedTypeCreator.java:95)
        at br.com.caelum.vraptor.reflection.CacheBasedTypeCreator.typeFor(CacheBasedTypeCreator.java:54)
        at br.com.caelum.vraptor.http.ognl.OgnlParametersProvider.createViaOgnl(OgnlParametersProvider.java:113)
        at br.com.caelum.vraptor.http.ognl.OgnlParametersProvider.createRoot(OgnlParametersProvider.java:108)
        at br.com.caelum.vraptor.http.ognl.OgnlParametersProvider.getParametersFor(OgnlParametersProvider.java:90)
        at br.com.caelum.vraptor.interceptor.ParametersInstantiatorInterceptor.getParametersFor(ParametersInstantiatorInterceptor.java:83)
        at br.com.caelum.vraptor.interceptor.ParametersInstantiatorInterceptor.intercept(ParametersInstantiatorInterceptor.java:68)
        at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:46)
        at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
        at br.com.caelum.vraptor.interceptor.InstantiateInterceptor.intercept(InstantiateInterceptor.java:42)
        at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:41)
        at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
        at br.com.caelum.vraptor.util.hibernate.HibernateTransactionInterceptor.intercept(HibernateTransactionInterceptor.java:45)
        at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:41)
        at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
        at br.com.caelum.vraptor.interceptor.InterceptorListPriorToExecutionExtractor.intercept(InterceptorListPriorToExecutionExtractor.java:46)
        at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:46)
        at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
        at br.com.caelum.vraptor.interceptor.FlashInterceptor.intercept(FlashInterceptor.java:80)
        at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:46)
        at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
        at br.com.caelum.vraptor.interceptor.ResourceLookupInterceptor.intercept(ResourceLookupInterceptor.java:67)
        at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:46)
        at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
        at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:48)
        at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
        at br.com.caelum.vraptor.core.DefaultRequestExecution.execute(DefaultRequestExecution.java:62)
        at br.com.caelum.vraptor.VRaptor$1.insideRequest(VRaptor.java:91)
        at br.com.caelum.vraptor.ioc.spring.SpringProvider.provideForRequest(SpringProvider.java:55)
        at br.com.caelum.vraptor.VRaptor.doFilter(VRaptor.java:88)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
        at java.lang.Thread.run(Thread.java:619)

e eu precisava recuperar os valores dentros [][], por exemplo, se o usuário clicar no input resposta[1][3], preciso saber que ele escolheu a resposta 1 e 3 e o value também…
Será que consegui explicar direito?

Obrigado, t+

#2

tenta trocar o String[][] por List<List> e ver se funciona… Não tenho certeza se isso funciona, mas testa ai

#3

de qualquer forma, o melhor jeito de fazer isso não é com uma matriz bidimensional…

crie a classe:

public class Categoria { // ou qqer nome melhor
   private List<Pergunta> perguntas;
   // getters e setters
}
public class Pergunta {
    private String resposta;
    //getters e setters
}

no controller:

public void recebe(List<Categoria> categorias) {...}

no jsp, os inputs ficam:

<input type="radio" name="categorias[1].perguntas[2].resposta" value="1" />

isso funciona

#4