3 Replies Latest reply on Mar 14, 2007 1:53 PM by robjellinghaus

I try a4j-dropDownBoxes with jsf/seam but I can´t do it to w

aristide Mar 14, 2007 12:36 PM

Sorry for my telegrafic english but I try a lot but and I can´t do it to work....my fragment facelets:

<tr>
 <td class="cntForm">Estado (UF):</td>
 <td class="cntForm">
 <h:panelGroup>
 <h:selectOneMenu value="#{buscaAction.estado}"
 converter="#{estados.converter}">
 <f:selectItem itemLabel="" itemValue="#{estados.nullEstado}" />
 <f:selectItems value="#{estados.estados}" />
 <a4j:support event="onchange" action="#{buscaAction.fazNada}"
 ajaxSingle="true" reRender="Option1" />
 </h:selectOneMenu>
 </h:panelGroup>
 </td>
 </tr>
 <tr>
 <td class="cntForm">Cidade:</td>
 <td class="cntForm">
 <h:panelGroup id="Option1">
 <h:selectOneMenu value="#{visitante.cidadeByCidadeId}"
 converter="#{cidades.converter}">
 <f:selectItem itemLabel="" itemValue="#{cidades.nullCidade}" />
 <f:selectItems value="#{cidades.cidades}" />
 <a4j:support event="onchange"/>
 </h:selectOneMenu>
 </h:panelGroup>

 </td>
 </tr>

I can to submit page without erros with this three web_beans:

@Stateful
@Name("estados")
@Scope(ScopeType.EVENT)
public class EstadosBean
 implements Estados,
 Serializable
{
 List<Estado> estados;
 Map<String,Estado> estadoMap;

 @PersistenceContext
 EntityManager em;

 @Create
 public void loadData() {

 estados = em.createQuery("select c from Estado c")
 .setHint("org.hibernate.cacheable", true)
 .getResultList();

 Map<String,Estado> results = new TreeMap<String,Estado>();

 for (Estado estado: estados) {
 results.put(estado.getEstadoSigla(),estado);
 }

 estadoMap = results;
 }

 public Map<String,Estado> getEstados() {
 return estadoMap;
 }

 public Converter getConverter() {
 return new EstadoConverter(estados);
 }

 public Estado getNullEstado() {
 return new Estado();
 }

 static public class EstadoConverter
 implements Converter,
 Serializable
 {
 List<Estado> estados;

 public EstadoConverter(List<Estado> estados) {
 this.estados = estados;
 }

 public String getAsString(FacesContext facesContext,
 UIComponent component,
 Object obj)
 {
 if (obj == null) return null;

 Estado estado = (Estado) obj;
 String val = String.valueOf(estado.getEstadoSigla());

 return val;
 }

 public Object getAsObject(FacesContext facesContext,
 UIComponent component,
 String str)
 throws ConverterException
 {
 if (str == null || str.length()==0) {
 return null;
 }

 for (Estado estado : estados) {
 if (estado.getEstadoSigla() == str) {
 return estado;
 }
 }

 return null;
 }
 }

 @Remove @Destroy
 public void destroy() {}
}

@Stateful
@Name("cidades")
@Scope(ScopeType.EVENT)
public class CidadesBean
 implements Cidades,
 Serializable
{
 @In
 BuscaAction buscaAction;

 List<Cidade> cidades;
 List<Cidade> selecionadas;
 Map<String,Cidade> cidadeMap;

 @PersistenceContext
 EntityManager em;

 @Create
 public void loadData() {
 cidades = em.createQuery("select c from Cidade c" )
 .setHint("org.hibernate.cacheable", true)
 .getResultList();

 Map<String,Cidade> results = new TreeMap<String,Cidade>();

 for (Cidade cidade: cidades) {
 results.put(cidade.getCidadeNome(),cidade);
 }

 selecionadas = cidades;
 cidadeMap = results;
 }

 public void selecionarCidades() {
 System.out.println(buscaAction.getEstado());
 if (buscaAction.getEstado().getEstadoSigla() != null)
 for (Cidade cidade: cidades) {
 System.out.println(cidade.getEstado().getEstadoSigla());
 System.out.println(buscaAction.getEstado().getEstadoSigla());
 if (cidade.getEstado().getEstadoSigla().equals(buscaAction.getEstado().getEstadoSigla()))
 selecionadas.add(cidade);
 }

 }

 public Map<String,Cidade> getCidades() {
 return cidadeMap;
 }

 public Converter getConverter() {
 return new CidadeConverter(selecionadas);
 }

 public Cidade getNullCidade() {
 return new Cidade();
 }

 static public class CidadeConverter
 implements Converter,
 Serializable
 {
 List<Cidade> cidades;

 public CidadeConverter(List<Cidade> cidades) {
 this.cidades = cidades;
 }

 public String getAsString(FacesContext facesContext,
 UIComponent component,
 Object obj)
 {
 if (obj == null) return null;

 Cidade cidade = (Cidade) obj;
 String val = String.valueOf(cidade.getCidadeId());

 return val;
 }

 public Object getAsObject(FacesContext facesContext,
 UIComponent component,
 String str)
 throws ConverterException
 {
 if (str == null || str.length()==0) {
 return null;
 }

 int id = Integer.valueOf(str).intValue();
 for (Cidade cidade : cidades) {
 if (cidade.getCidadeId() == id) {
 return cidade;
 }
 }

 return null;
 }
 }

 @Remove @Destroy
 public void destroy() {}
}

@Stateful
@Name("buscaAction")
@Scope(SESSION)
public class BuscaActionBean implements BuscaAction {
/*
 @PersistenceContext
 EntityManager em;
*/
 Estado estado;

 List<Cidade> cidades;
 Map<String,Cidade> cidadeMap;

 public void setEstado(Estado estado) {
 this.estado = estado ;
 }

 public Estado getEstado() {
 return estado;
 }

 public void fazNada() {}

 @Destroy
 @Remove
 public void destroy() {}

}

But if I modify this

<a4j:support event="onchange" action="#{buscaAction.fazNada}"

for this

<a4j:support event="onchange" action="#{cidades.selecionarCidades}"

I receive this error (debug.xml):

xception during request processing: java.lang.NullPointerException:

br.com.qrx.CidadesBean.selecionarCidades(CidadesBean.java:60)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
org.jboss.seam.intercept.EJBInvocationContext.proceed(EJBInvocationContext.java:37)
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57)
org.jboss.seam.interceptors.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:47)
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
org.jboss.seam.interceptors.BusinessProcessInterceptor.aroundInvoke(BusinessProcessInterceptor.java:51)
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27)
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:53)
sun.reflect.GeneratedMethodAccessor218.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:57)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:46)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:203)
org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98)
$Proxy130.selecionarCidades(Unknown Source)
br.com.qrx.Cidades$$FastClassByCGLIB$$8fbbcead.invoke(<generated>)
net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45)
org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:74)
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57)
org.jboss.seam.interceptors.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:40)
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
org.jboss.seam.intercept.ClientSideInterceptor.intercept(ClientSideInterceptor.java:52)
org.jboss.seam.intercept.Proxy$$EnhancerByCGLIB$$27af74c6.selecionarCidades(<generated>)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
com.sun.el.parser.AstValue.invoke(AstValue.java:151)
com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283)
com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:69)
org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63)
org.ajax4jsf.framework.ajax.AjaxActionComponent.broadcast(AjaxActionComponent.java:88)
org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:274)
org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:250)
org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:405)
org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:343)
org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:137)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63)
org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79)
org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:75)
org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:213)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
java.lang.Thread.run(Unknown Source)

What am i wrong ? Aristides

1. Re: I try a4j-dropDownBoxes with jsf/seam but I can´t do it

sergeysmirnov Mar 14, 2007 1:01 PM (in response to aristide)

I do not think that something wrong from the Ajax4jsf point of view. According to the 30 top lines of the stack trace you need to ask Seam or ejb3 experts what is going on there.
Actions
2. Re: I try a4j-dropDownBoxes with jsf/seam but I can´t do it

robjellinghaus Mar 14, 2007 1:52 PM (in response to aristide)
The actual error you have is:
Exception during request processing: java.lang.NullPointerException: br.com.qrx.CidadesBean.selecionarCidades(CidadesBean.java:60)
Actions
3. Re: I try a4j-dropDownBoxes with jsf/seam but I can´t do it

robjellinghaus Mar 14, 2007 1:53 PM (in response to aristide)

...sorry, my reply got truncated somehow. What line is that, exactly? Your CidadesBean source doesn't have line numbers.

Sergey is likely correct that this is more of a Seam issue than a JSF issue.
Actions

Go to original post