vaadin 8 bind

Fabio107 · July 25, 2017, 9:54pm

I have this bind:binderProtocolo.forField(numeroVias).withConverter(new StringToIntegerConverter(0,"Campo deve conter apenas números")).bind(br.com.exmart.rtdpjlite.model.Protocolo::getVias, br.com.exmart.rtdpjlite.model.Protocolo::setVias);and

this entity:

@Entity(name = "protocolo")
public class Protocolo {
...
private Integer vias;
private BigDecimal valor;
...
}

so, if I only make protocolo = new Protocolo()

and try to use:

binderProtocolo.readBean(this.protocolo);

I got the error:

java.lang.NullPointerException: value cannot be null
at java.util.Objects.requireNonNull(Objects.java:228)
at com.vaadin.ui.AbstractTextField.setValue(AbstractTextField.java:97)
at com.vaadin.ui.AbstractTextField.setValue(AbstractTextField.java:47)
at com.vaadin.data.Binder$BindingImpl.initFieldValue(Binder.java:893)
at com.vaadin.data.Binder$BindingImpl.access$100(Binder.java:766)
at com.vaadin.data.Binder.lambda$readBean$2(Binder.java:1386)
at java.lang.Iterable.forEach(Iterable.java:75)
at com.vaadin.data.Binder.readBean(Binder.java:1386)
at br.com.exmart.indicadorRTDPJ.ui.impl.ProtocoloImpl.bindCampos(ProtocoloImpl.java:145)
at br.com.exmart.indicadorRTDPJ.ui.impl.ProtocoloImpl.<init>(ProtocoloImpl.java:80)
at br.com.exmart.indicadorRTDPJ.ui.impl.ViewPrenotacaoRTDImpl.enter(ViewPrenotacaoRTDImpl.java:82)
at com.vaadin.navigator.Navigator.performNavigateTo(Navigator.java:676)
at com.vaadin.navigator.Navigator.lambda$navigateTo$9a874efd$1(Navigator.java:598)
at com.vaadin.navigator.Navigator.runAfterLeaveConfirmation(Navigator.java:624)
at com.vaadin.navigator.Navigator.navigateTo(Navigator.java:597)
at com.vaadin.navigator.Navigator.navigateTo(Navigator.java:574)
at com.vaadin.ui.UI.doInit(UI.java:750)
at com.vaadin.server.communication.UIInitHandler.getBrowserDetailsUI(UIInitHandler.java:216)
at com.vaadin.server.communication.UIInitHandler.synchronizedHandleRequest(UIInitHandler.java:74)
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:41)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1568)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:381)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:728)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:467)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:351)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311)
at org.springframework.web.servlet.mvc.ServletForwardingController.handleRequestInternal(ServletForwardingController.java:133)
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:174)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:50)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

how can I fix this??

ollit.1 · July 26, 2017, 12:11pm

Based on your stacktrace and looking at AbstractTextField.java around line 97:

/** * Sets the value of this text field. If the new value is not equal to * {@code getValue()}, fires a {@link ValueChangeEvent}. Throws * {@code NullPointerException} if the value is null. * * @param value * the new value, not {@code null} * @throws NullPointerException * if {@code value} is {@code null} */ @Override public void setValue(String value) { Objects.requireNonNull(value, "value cannot be null"); // Line 97 setValue(value, false); }So looks like the setValue method is being called with a null String. Maybe you could try initializing the field with an empty String?

-Olli

Fabio107 · July 26, 2017, 2:27pm

So why when I bind a String works fine?? and in the StringToIntegerConverter the first parameter are a null value and even when I set the 0 I got the error

nabeel6 · October 25, 2017, 1:16pm

Had same problem with StringToIntegerConverter

incase you are using Binder.readBean(this.protocolo) or Binder.setBean(this.protocolo) the value returned from this.protocolo.getVias() cannot be NULL.

this mean you’ll need to initialize the “Integer vias” before call the Binder.readBean(this.protocolo) or Binder.setBean(this.protocolo)