Hi everyone,

I'm trying to execute the method findByPrimaryKey (Class classe, Serializable primaryKey), passing as argument an object wich identifier is a String.
I've already checked the Hibernate.cfg.xml, the xml file of the object and it does not seem to have any problem.
the bank is Oracle. The exception that occurs in the moment of the query is below:

java.lang.ClassCastException
net.sf.hibernate.type.StringType.toString(StringType.java:47)
net.sf.hibernate.type.NullableType.nullSafeSet(NullableType.java:46)
net.sf.hibernate.type.NullableType.nullSafeSet(NullableType.java:35)
net.sf.hibernate.loader.Loader.bindPositionalParameters(Loader.java:674)
net.sf.hibernate.loader.Loader.prepareQueryStatement(Loader.java:713)
net.sf.hibernate.loader.Loader.doQuery(Loader.java:185)
net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
net.sf.hibernate.loader.Loader.loadEntity(Loader.java:836)
net.sf.hibernate.loader.Loader.loadEntity(Loader.java:856)
net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:59)
net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:51)
net.sf.hibernate.persister.EntityPersister.load(EntityPersister.java:419)
net.sf.hibernate.impl.SessionImpl.doLoad(SessionImpl.java:2106)
net.sf.hibernate.impl.SessionImpl.doLoadByClass(SessionImpl.java:1980)
net.sf.hibernate.impl.SessionImpl.get(SessionImpl.java:1916)
br.org.df.codeplan.sigterra.dao.BaseDAO.findByPrimaryKey(BaseDAO.java:129)
br.org.df.codeplan.sigterra.dao.ContabilDAO.findConta(ContabilDAO.java:52)
br.org.df.codeplan.sigterra.facade.ContabilFacade.findConta(ContabilFacade.java:65)
br.org.df.codeplan.sigterra.struts.contabil.realizaLancamentoManual.RealizaLancamentoManualAction.chamaPaginaInformarValor(RealizaLancamentoManualAction.java:50)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:324)
org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280)
org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:216)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

If anyone has already had this problem, would please help me? What are the possible reasons for this exception occurs?

Thank you, Guilherme