Validating dates

[dahm]

Hi,

I'm having an Entity class which contains Date objects, say
(excuse me, I'm too lazy to translate all the names ;-)

@Entity
@Name("vertrag")
@Scope(SESSION)
public class Vertrag implements Serializable {
...
private Date _vertragsBeginn;

 @Basic
 @Temporal(TemporalType.DATE)
 public Date getVertragsBeginn() {
 return _vertragsBeginn;
 }

 public void setVertragsBeginn(Date vertragsBeginn) {
 _vertragsBeginn = vertragsBeginn;
 }
....
}

Now I'd like to fill in a form and set the values of that entity:

<c:view>
 <h:form>
 <table border="0">
 <tr>
 <td>Vertragsbeginn:</td>
 <td><h:inputText value="#{vertrag.vertragsBeginn}">
 <f:convertDateTime type="date" pattern="dd.MM.yyyy"/>
 </h:inputText>
 </td>
 </tr>
 </table>

 <FONT color="RED"> <h:messages /> </FONT>

 <h:commandButton type="submit" value="Anlegen"
 action="#{registerVertrag.register}" />
 </h:form>
</c:view>

I got a bean to do it all:

@Stateless
@Name("registerVertrag")
@Interceptors(SeamInterceptor.class)
public class RegisterVertragActionBean implements RegisterVertragAction {
 private static final Category _logger = Logger.getInstance(RegisterVertragActionBean.class);

 @In(value = "vertrag")
 @Out(value = "vertrag", required = false)
 @Valid
 private Vertrag _vertrag;

 @PersistenceContext
 private EntityManager _em;

 @IfInvalid(outcome = Outcome.REDISPLAY)
 public String register() {
 _em.persist(_vertrag);
 _vertrag = null;
 return "success";
 }
}

Looks fine so far for me. However it does seem to me that Hibernate,
Seam or
JSF MyFaces does not recognize that the property "vertragsBeginn" is
a date and tries to set is a a string:

15:00:27,906 ERROR [[/iv]] Cannot set value for expression '#{vertrag.vertragsBeginn}' to a new value of type java.lang.String
javax.faces.el.EvaluationException: Cannot set value for expression '#{vertrag.vertragsBeginn}' to a new value of type java.lang.String
 at org.apache.myfaces.el.ValueBindingImpl.setValue(ValueBindingImpl.java:304)
 at javax.faces.component.UIInput.updateModel(UIInput.java:226)
 at javax.faces.component.UIInput.processUpdates(UIInput.java:165)
 at javax.faces.component.UIForm.processUpdates(UIForm.java:85)
 at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:428)
 at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:153)
 at org.apache.myfaces.lifecycle.LifecycleImpl.updateModelValues(LifecycleImpl.java:277)
 at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:81)
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:106)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
 at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:54)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:174)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
 at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
 at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
 at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
 at java.lang.Thread.run(Thread.java:595)
Caused by: javax.faces.el.EvaluationException: de.kvbb.ingver.model.Vertrag
 at org.apache.myfaces.el.PropertyResolverImpl.setValue(PropertyResolverImpl.java:155)
 at org.apache.myfaces.el.ValueBindingImpl.setValue(ValueBindingImpl.java:269)
 ... 27 more
Caused by: javax.faces.el.EvaluationException: Bean: de.kvbb.ingver.model.Vertrag, property: vertragsBeginn
 at org.apache.myfaces.el.PropertyResolverImpl.setProperty(PropertyResolverImpl.java:372)
 at org.apache.myfaces.el.PropertyResolverImpl.setValue(PropertyResolverImpl.java:148)
 ... 28 more
Caused by: java.lang.IllegalArgumentException: argument type mismatch
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.apache.myfaces.el.PropertyResolverImpl.setProperty(PropertyResolverImpl.java:368)

What can I do to ensure that the value is converted to a date given
the specified format ("dd.MM.yyyy"). I didn't find a Hibernate tag for
this purpose (Struts did have this, never mind :-)

BTW: I'd like to use the validators/setters for other kind of objects, too.
Even, if I have to write my own validator for that. Quite simple thanks
to Hibernate...


Thanks in advance
Markus

[jameswoodward]

That looks like a JSF MyFaces error to me.