[RESOLVIDO] Vraptor 3 - Tratamento de tipo de objeto da view

<context-param>
    <param-name>br.com.caelum.vraptor.packages</param-name>
    <param-value>br.com.caelum.vraptor.converter.l10n</param-value>
</context-param>

<context-param>
    <param-name>javax.servlet.jsp.jstl.fmt.locale</param-name>
    <param-value>pt_BR</param-value>
</context-param>

public void foo(Date nascimento) {
    [...]
}

<context-param>  
     <param-name>br.com.caelum.vraptor.packages</param-name>      
     <param-value>br.com.caelum.vraptor.converter.l10n</param-value>  
 	</context-param>

// formatando Moeda
<input id="real" name="produto.valor" type="text" value="<fmt:formatNumber value="${produto.valor}" minFractionDigits="2"/>"  />

// formatando Data
<input id="data" name="produto.dataInclusao" type="text" value="<fmt:formatDate pattern='dd/MM/yyyy' value="${produto.dataInclusao }"/>"/></input>

<context-param>    
     <param-name>br.com.caelum.vraptor.packages</param-name>        
     <param-value>br.com.caelum.vraptor.converter.l10n</param-value>    
    </context-param>

13:50:51,897 DEBUG [ComponentScanner    ] scanning [br.com.caelum.vraptor.converter.l10n]
13:50:51,908  INFO [DefaultListableBeanFactory] Overriding bean definition for bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor': replacing [Root bean: class [org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] with [Root bean: class [br.com.caelum.vraptor.ioc.spring.InjectionBeanPostProcessor]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null]
13:50:51,915 DEBUG [VRaptorApplicationContext] Bean factory for Root WebApplicationContext: org.springframework.beans.factory.support.DefaultListableBeanFactory@1ba614a: defining beans [XStreamXMLDeserializer,asmBasedTypeCreator,defaultConverters,objenesisProxifier,defaultMultipartConfig,encodingHandlerFactory,defaultAcceptHeaderToFormat,defaultRouter,defaultTypeNameExtractor,defaultDeserializers,defaultRoutes,defaultTypeFinder,defaultMethodNotAllowedHandler,defaultResourceTranslator,defaultResourceNotFoundHandler,pathAnnotationRoutesParser,defaultInterceptorRegistry,emptyElementsRemoval,noRoutesConfiguration,paranamerNameProvider,stereotypeHandler,converterHandler,interceptorStereotypeHandler,deserializesHandler,stereotypedBeansRegistrar,defaultSpringLocator,applicationConfiguration,downloadInterceptor,defaultResult,defaultRepresentationResult,defaultRefererResult,multipartInterceptor,XStreamJSONSerialization,jstlLocalization,deserializingInterceptor,XStreamXMLSerialization,forwardToDefaultViewInterceptor,flashInterceptor,defaultValidator,parametersInstantiatorInterceptor,defaultStatus,defaultValidationViewsFactory,executeMethodInterceptor,emptyResult,defaultPageResult,ognlParametersProvider,defaultPathResolver,replicatorOutjector,defaultLogicResult,instantiateInterceptor,defaultFormatResolver,defaultHttpResult,defaultMethodInfo,interceptorListPriorToExecutionExtractor,resourceLookupInterceptor,outjectResult,bigDecimalConverter,bigIntegerConverter,booleanConverter,byteConverter,characterConverter,doubleConverter,enumConverter,floatConverter,integerConverter,localeBasedCalendarConverter,localeBasedDateConverter,longConverter,primitiveBooleanConverter,primitiveByteConverter,primitiveCharConverter,primitiveDoubleConverter,primitiveFloatConverter,primitiveIntConverter,primitiveLongConverter,primitiveShortConverter,shortConverter,uploadedFileConverter,VRaptorRequestProvider,httpServletRequestProvider,httpServletResponseProvider,httpSessionProvider,localDateConverter,localTimeConverter,defaultInterceptorStack,defaultRequestExecution,categoriasController,cepController,familiasController,fornecedoresController,multiEansController,nfEntradaController,nutricaoController,parametrosController,produtosController,receitasController,usuariosController,categoriaDao,cstADao,divisaoDao,embCompraDao,embRecebimentoDao,embVendaDao,familiaDao,figuraFiscalDao,grupoDao,impostoDao,logbairroDao,log_faixa_ufDao,log_logradouroDao,lojaDao,marcaDao,multiEanDao,nutricaoDao,pisCofinsDao,produtoDao,produtoEanDao,produtoLojaDao,produtoPesadoDao,produtoRapidoDao,receitaDao,secaoDao,setorCustoDao,setorDao,subGrupoDao,tipoEmbalagemDao,tipoProdutoDao,usuarioDao,criadorDeSession,criadorDeSessionFactory,autorizacaoInterceptor,usuarioWeb,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.aop.config.internalAutoProxyCreator,cacheBasedTypeCreator]; root of factory hierarchy
13:50:52,289 DEBUG [VRaptorApplicationContext] Unable to locate MessageSource with name 'messageSource': using default [org.springframework.context.support.DelegatingMessageSource@1a6b028]
13:50:52,292 DEBUG [VRaptorApplicationContext] Unable to locate ApplicationEventMulticaster with name 'applicationEventMulticaster': using default [org.springframework.context.event.SimpleApplicationEventMulticaster@772046]
13:50:52,303  INFO [DefaultListableBeanFactory] Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1ba614a: defining beans [XStreamXMLDeserializer,asmBasedTypeCreator,defaultConverters,objenesisProxifier,defaultMultipartConfig,encodingHandlerFactory,defaultAcceptHeaderToFormat,defaultRouter,defaultTypeNameExtractor,defaultDeserializers,defaultRoutes,defaultTypeFinder,defaultMethodNotAllowedHandler,defaultResourceTranslator,defaultResourceNotFoundHandler,pathAnnotationRoutesParser,defaultInterceptorRegistry,emptyElementsRemoval,noRoutesConfiguration,paranamerNameProvider,stereotypeHandler,converterHandler,interceptorStereotypeHandler,deserializesHandler,stereotypedBeansRegistrar,defaultSpringLocator,applicationConfiguration,downloadInterceptor,defaultResult,defaultRepresentationResult,defaultRefererResult,multipartInterceptor,XStreamJSONSerialization,jstlLocalization,deserializingInterceptor,XStreamXMLSerialization,forwardToDefaultViewInterceptor,flashInterceptor,defaultValidator,parametersInstantiatorInterceptor,defaultStatus,defaultValidationViewsFactory,executeMethodInterceptor,emptyResult,defaultPageResult,ognlParametersProvider,defaultPathResolver,replicatorOutjector,defaultLogicResult,instantiateInterceptor,defaultFormatResolver,defaultHttpResult,defaultMethodInfo,interceptorListPriorToExecutionExtractor,resourceLookupInterceptor,outjectResult,bigDecimalConverter,bigIntegerConverter,booleanConverter,byteConverter,characterConverter,doubleConverter,enumConverter,floatConverter,integerConverter,localeBasedCalendarConverter,localeBasedDateConverter,longConverter,primitiveBooleanConverter,primitiveByteConverter,primitiveCharConverter,primitiveDoubleConverter,primitiveFloatConverter,primitiveIntConverter,primitiveLongConverter,primitiveShortConverter,shortConverter,uploadedFileConverter,VRaptorRequestProvider,httpServletRequestProvider,httpServletResponseProvider,httpSessionProvider,localDateConverter,localTimeConverter,defaultInterceptorStack,defaultRequestExecution,categoriasController,cepController,familiasController,fornecedoresController,multiEansController,nfEntradaController,nutricaoController,parametrosController,produtosController,receitasController,usuariosController,categoriaDao,cstADao,divisaoDao,embCompraDao,embRecebimentoDao,embVendaDao,familiaDao,figuraFiscalDao,grupoDao,impostoDao,logbairroDao,log_faixa_ufDao,log_logradouroDao,lojaDao,marcaDao,multiEanDao,nutricaoDao,pisCofinsDao,produtoDao,produtoEanDao,produtoLojaDao,produtoPesadoDao,produtoRapidoDao,receitaDao,secaoDao,setorCustoDao,setorDao,subGrupoDao,tipoEmbalagemDao,tipoProdutoDao,usuarioDao,criadorDeSession,criadorDeSessionFactory,autorizacaoInterceptor,usuarioWeb,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.aop.config.internalAutoProxyCreator,cacheBasedTypeCreator]; root of factory hierarchy
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
log4j:WARN Please initialize the log4j system properly.
13:50:55,010 DEBUG [VRaptorApplicationContext] Unable to locate LifecycleProcessor with name 'lifecycleProcessor': using default [org.springframework.context.support.DefaultLifecycleProcessor@d0cdd0]
13:50:55,085  INFO [DefaultConverters   ] Registering bundled converters
13:50:55,085 DEBUG [DefaultConverters   ] bundled converter to be registered: class br.com.caelum.vraptor.converter.BigDecimalConverter
13:50:55,085 DEBUG [DefaultConverters   ] bundled converter to be registered: class br.com.caelum.vraptor.converter.BigIntegerConverter
13:50:55,085 DEBUG [DefaultConverters   ] bundled converter to be registered: class br.com.caelum.vraptor.converter.BooleanConverter
13:50:55,085 DEBUG [DefaultConverters   ] bundled converter to be registered: class br.com.caelum.vraptor.converter.ByteConverter
13:50:55,085 DEBUG [DefaultConverters   ] bundled converter to be registered: class br.com.caelum.vraptor.converter.CharacterConverter
13:50:55,085 DEBUG [DefaultConverters   ] bundled converter to be registered: class br.com.caelum.vraptor.converter.DoubleConverter

System.out.println(produto.getValor());

@Convert(Double.class)
public class CustomDoubleConverter extends Converter<Double> {
     public Double convert(String value, ....) {
          if (value == null || "".equals(value)) return 0.0;
          return Double.valueOf(value.replace(".", "").replace(",", "."));
     }
}

import java.text.MessageFormat;
import java.util.ResourceBundle;

import br.com.caelum.vraptor.Convert;
import br.com.caelum.vraptor.Converter;
import br.com.caelum.vraptor.converter.ConversionError;

@Convert(Double.class)
public class CustomDoubleConverter implements Converter<Double>{
	public Double convert(String value, Class<? extends Double> type, ResourceBundle bundle) {  
		         if (value == null || value.equals("")) {  
		             return null;  
		         }  
		         try {  
		        	 return Double.parseDouble( value.replace(".","").replace(",",".") );  
		         } catch (NumberFormatException e) {  
		             throw new ConversionError(MessageFormat.format(bundle.getString("is_not_a_valid_number"), value));  
		         }  
		     } 
}

applying produto.valor with [1,1]

18:27:00,594 DEBUG [VRaptorApplicationContext] Cache miss for class br.com.caelum.vraptor.converter.PrimitiveIntConverter
18:27:00,587 DEBUG [VRaptorApplicationContext] Cache miss for class br.com.caelum.vraptor.converter.PrimitiveDoubleConverter

class Produto {
 
   public void setValor(String valor) {
        //codigo q tava no converter
   }
}

@Embeddable
public class Moeda {

    private BigDecimal valor;
    
    private Moeda() {} //pro hibernate não reclamar

    private Moeda(String value) {
         this.valor = BigDecimal.valueOf(value);
    }
}

@Convert(Integer.class)
public class CustomConverter extends IntegerConverter {
    //delegate constructor

    public Integer convert(String value, ....) {
        if (value == null) return null;

        return super.convert(value.replace(".", ""), ...);
    }
}

@Convert(Integer.class)
public class CustomConverter implements Converter<Integer>{
	
	public Integer convert(String value, Class<? extends Integer> type, ResourceBundle bundle) { 
        if (value == null || value.equals("")) {  
            return null;  
        }  
        try {  
       	 return Integer.parseInt( value.replace(".",""));  
        } catch (NumberFormatException e) {  
            throw new ConversionError(MessageFormat.format(bundle.getString("is_not_a_valid_number"), value));  
        }  
    } 

}