ola pessoal estou com a seguinte exception
java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer
br.com.caelum.vraptor.http.ognl.ListAccessor.setProperty(ListAccessor.java:67)
ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2225)
ognl.ASTProperty.setValueBody(ASTProperty.java:127)
ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)
ognl.SimpleNode.setValue(SimpleNode.java:279)
ognl.ASTChain.setValueBody(ASTChain.java:227)
ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)
ognl.SimpleNode.setValue(SimpleNode.java:279)
ognl.Ognl.setValue(Ognl.java:737)
ognl.Ognl.setValue(Ognl.java:783)
br.com.caelum.vraptor.http.ognl.OgnlParametersProvider.setProperty(OgnlParametersProvider.java:157)
br.com.caelum.vraptor.http.ognl.OgnlParametersProvider.createParameter(OgnlParametersProvider.java:144)
br.com.caelum.vraptor.http.ognl.OgnlParametersProvider.getParametersFor(OgnlParametersProvider.java:96)
br.com.caelum.vraptor.interceptor.ParametersInstantiatorInterceptor.getParametersFor(ParametersInstantiatorInterceptor.java:107)
br.com.caelum.vraptor.interceptor.ParametersInstantiatorInterceptor.intercept(ParametersInstantiatorInterceptor.java:79)
br.com.caelum.vraptor.core.LazyInterceptorHandler.execute(LazyInterceptorHandler.java:59)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:56)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.util.hibernate.HibernateTransactionInterceptor.intercept(HibernateTransactionInterceptor.java:48)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.FlashInterceptor.intercept(FlashInterceptor.java:83)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:56)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.InstantiateInterceptor.intercept(InstantiateInterceptor.java:48)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.ExceptionHandlerInterceptor.intercept(ExceptionHandlerInterceptor.java:71)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.ResourceLookupInterceptor.intercept(ResourceLookupInterceptor.java:69)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.core.EnhancedRequestExecution.execute(EnhancedRequestExecution.java:23)
br.com.caelum.vraptor.VRaptor$1.insideRequest(VRaptor.java:92)
br.com.caelum.vraptor.ioc.spring.SpringProvider.provideForRequest(SpringProvider.java:58)
br.com.caelum.vraptor.VRaptor.doFilter(VRaptor.java:89)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
esse erro acontece quando vou salvar um objeto no banco com os dados do form jsp