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Posted to users@myfaces.apache.org by José Luis Cetina <ma...@gmail.com> on 2012/08/30 17:31:05 UTC
Save component state
Hi. I have a problem using myfaces 2.1.8 + openjpa 2.2.0 + primefaces
3.4-SNAPSHOT.
I dont know if asked this in openjpa list or here, anyway, i hope somebody
can help me.
I have 2 SelectOneMenu in a composite component(cc), this cc has a
componentType in a facescomponent class.
The first selectonemenu have a change event in the cc, when this event is
fired the second selectonemenu load data from the database.
In the facescomponent class i use statehelper to save the state of the 2
selectonemenu's, but i have a problem:
This is the scenario:
I have this in my database:
Table country:
id name
1 Spain
2 Mexico
3 USA
Table cities:
id fk name
1 3 New York
2 3 LA
When my page load the country selectonemenu show all the countries without
problem (i retrive them using openjpa), in the cities selectonemenu's show
nothing because Spain doesnt have cities, well then if i select Mexico my
valuechangelistener method execute and load all the cities, but Mexico
doesnt have nothing in the database then again nothing showed as expected,
then if a select USA the cities are retrived OK and they are shown in the
cities selectonemenu although if i select another city like Spain i can see
this error (my valuechangelistener never get called again):
java.lang.InstantiationException:
org.apache.openjpa.kernel.DelegatingResultList
java.lang.InstantiationException:
org.apache.openjpa.kernel.DelegatingResultList at
java.lang.Class.newInstance0(Class.java:357) at
java.lang.Class.newInstance(Class.java:325) at
javax.faces.component.UIComponentBase.restoreAttachedState(UIComponentBase.java:1842) at
javax.faces.component._DeltaStateHelper.restoreState(_DeltaStateHelper.java:616) at
javax.faces.component.UIComponentBase.restoreState(UIComponentBase.java:2021) at
org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:661) at
org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:680) at
org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:680) at
org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:680) at
org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreView(DefaultFaceletsStateManagementStrategy.java:330) at
org.apache.myfaces.application.StateManagerImpl.restoreView(StateManagerImpl.java:130) at
org.apache.myfaces.shared.view.ViewDeclarationLanguageBase.restoreView(ViewDeclarationLanguageBase.java:106) at
org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.restoreView(FaceletViewDeclarationLanguage.java:2109) at
org.apache.myfaces.application.ViewHandlerImpl.restoreView(ViewHandlerImpl.java:300) at
com.ocpsoft.pretty.faces.application.PrettyViewHandler.restoreView(PrettyViewHandler.java:109) at
org.apache.myfaces.extensions.cdi.jsf.impl.scope.conversation.WindowContextAwareViewHandler.restoreView(WindowContextAwareViewHandler.java:122) at
org.apache.myfaces.extensions.cdi.jsf.impl.CodiViewHandler.restoreView(CodiViewHandler.java:99) at
javax.faces.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:83) at
javax.faces.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:83) at
org.apache.myfaces.lifecycle.RestoreViewExecutor.execute(RestoreViewExecutor.java:127) at
org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:170) at
org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117) at
org.apache.myfaces.extensions.cdi.jsf2.impl.listener.phase.CodiLifecycleWrapper.execute(CodiLifecycleWrapper.java:95) at
javax.faces.webapp.FacesServlet.service(FacesServlet.java:197) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at
com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:145) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225) at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at
org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45) at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001) at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at
java.lang.Thread.run(Thread.java:722)
I observe this:
If you select countries that doesnt have cities no error is shown
(something like moving from Spain to Mexico and viceversa), but when i
select a country like USA that have cities the cities load ok, but if i try
to select another country like mexico then the valuechangelistener method
never get called again because the exception is thrown.
I get the cities using this method:
public List<City> getCities(Country country) {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<City> cq = cb.createQuery(City.class);
Root<City> root = cq.from(City.class);
cq.select(root);
cq.where(cb.equal(root.get(City_.countryId).get(Country_.countryId),
country.getCountryId()));
List<City> resultList = (List<City>)
em.createQuery(cq).getResultList();
return resultList;
}
I debug my example and i can see in the saveAttachedState method of
UIComponentBase.java the list of cities is a type of DelagatingResultList
but i dont understand why, if im doing a cast when i use the getResultList
method, why openjpa encapsulate my object in a DelagatingResultList?
Then the attachedObject from the saveAttachedState method arrives as
DelagatingResultList and then it cant create an instance.
What i did is return a manual arraylist something like this, and the
exception never thrown.
public List<City> getCities(Country country) {
ArrayList<City> list = new ArrayList<City>(2);
list.add(new City("New York"));
list.add(new City("LA"));
return list;
}
Finally i dont know what or which is wrong, openjpa or myfaces, openjpa
return a DelagatingResultList object and myfaces cant create an instance of
that object.
What can i do ?
Re: Save component state
Posted by Mike Kienenberger <mk...@gmail.com>.
How is the list returned from getCities() being used?
Why is the list being serialized in a state?
Maybe this below was why and posting the code may help.
> In the facescomponent class i use statehelper to save the state of the 2
> selectonemenu's, but i have a problem:
One thing to keep in mind is that Myfaces has no control over
serializing and instantiating foreign objects.
Chances are that you either shouldn't be serializing it in the first
place, or you should be converting it to an explictly-serializable
form (like a standard list) first.
On Thu, Aug 30, 2012 at 11:31 AM, José Luis Cetina <ma...@gmail.com> wrote:
> Hi. I have a problem using myfaces 2.1.8 + openjpa 2.2.0 + primefaces
> 3.4-SNAPSHOT.
>
> I dont know if asked this in openjpa list or here, anyway, i hope somebody
> can help me.
>
> I have 2 SelectOneMenu in a composite component(cc), this cc has a
> componentType in a facescomponent class.
>
> The first selectonemenu have a change event in the cc, when this event is
> fired the second selectonemenu load data from the database.
>
> In the facescomponent class i use statehelper to save the state of the 2
> selectonemenu's, but i have a problem:
>
> This is the scenario:
>
> I have this in my database:
>
> Table country:
> id name
> 1 Spain
> 2 Mexico
> 3 USA
>
> Table cities:
> id fk name
> 1 3 New York
> 2 3 LA
>
> When my page load the country selectonemenu show all the countries without
> problem (i retrive them using openjpa), in the cities selectonemenu's show
> nothing because Spain doesnt have cities, well then if i select Mexico my
> valuechangelistener method execute and load all the cities, but Mexico
> doesnt have nothing in the database then again nothing showed as expected,
> then if a select USA the cities are retrived OK and they are shown in the
> cities selectonemenu although if i select another city like Spain i can see
> this error (my valuechangelistener never get called again):
>
> java.lang.InstantiationException:
> org.apache.openjpa.kernel.DelegatingResultList
> java.lang.InstantiationException:
> org.apache.openjpa.kernel.DelegatingResultList at
> java.lang.Class.newInstance0(Class.java:357) at
> java.lang.Class.newInstance(Class.java:325) at
> javax.faces.component.UIComponentBase.restoreAttachedState(UIComponentBase.java:1842) at
> javax.faces.component._DeltaStateHelper.restoreState(_DeltaStateHelper.java:616) at
> javax.faces.component.UIComponentBase.restoreState(UIComponentBase.java:2021) at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:661) at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:680) at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:680) at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:680) at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreView(DefaultFaceletsStateManagementStrategy.java:330) at
> org.apache.myfaces.application.StateManagerImpl.restoreView(StateManagerImpl.java:130) at
> org.apache.myfaces.shared.view.ViewDeclarationLanguageBase.restoreView(ViewDeclarationLanguageBase.java:106) at
> org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.restoreView(FaceletViewDeclarationLanguage.java:2109) at
> org.apache.myfaces.application.ViewHandlerImpl.restoreView(ViewHandlerImpl.java:300) at
> com.ocpsoft.pretty.faces.application.PrettyViewHandler.restoreView(PrettyViewHandler.java:109) at
> org.apache.myfaces.extensions.cdi.jsf.impl.scope.conversation.WindowContextAwareViewHandler.restoreView(WindowContextAwareViewHandler.java:122) at
> org.apache.myfaces.extensions.cdi.jsf.impl.CodiViewHandler.restoreView(CodiViewHandler.java:99) at
> javax.faces.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:83) at
> javax.faces.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:83) at
> org.apache.myfaces.lifecycle.RestoreViewExecutor.execute(RestoreViewExecutor.java:127) at
> org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:170) at
> org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117) at
> org.apache.myfaces.extensions.cdi.jsf2.impl.listener.phase.CodiLifecycleWrapper.execute(CodiLifecycleWrapper.java:95) at
> javax.faces.webapp.FacesServlet.service(FacesServlet.java:197) at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at
> com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:145) at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225) at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at
> org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45) at
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001) at
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at
> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at
> java.lang.Thread.run(Thread.java:722)
>
>
> I observe this:
>
> If you select countries that doesnt have cities no error is shown
> (something like moving from Spain to Mexico and viceversa), but when i
> select a country like USA that have cities the cities load ok, but if i try
> to select another country like mexico then the valuechangelistener method
> never get called again because the exception is thrown.
>
> I get the cities using this method:
>
> public List<City> getCities(Country country) {
>
> CriteriaBuilder cb = em.getCriteriaBuilder();
> CriteriaQuery<City> cq = cb.createQuery(City.class);
> Root<City> root = cq.from(City.class);
> cq.select(root);
> cq.where(cb.equal(root.get(City_.countryId).get(Country_.countryId),
> country.getCountryId()));
> List<City> resultList = (List<City>)
> em.createQuery(cq).getResultList();
> return resultList;
> }
>
> I debug my example and i can see in the saveAttachedState method of
> UIComponentBase.java the list of cities is a type of DelagatingResultList
> but i dont understand why, if im doing a cast when i use the getResultList
> method, why openjpa encapsulate my object in a DelagatingResultList?
>
> Then the attachedObject from the saveAttachedState method arrives as
> DelagatingResultList and then it cant create an instance.
>
> What i did is return a manual arraylist something like this, and the
> exception never thrown.
>
> public List<City> getCities(Country country) {
> ArrayList<City> list = new ArrayList<City>(2);
> list.add(new City("New York"));
> list.add(new City("LA"));
> return list;
> }
>
> Finally i dont know what or which is wrong, openjpa or myfaces, openjpa
> return a DelagatingResultList object and myfaces cant create an instance of
> that object.
> What can i do ?