Re: Bean property being set to null by Editor framework even though it cannot be null

Is X an EntityProxy or a ValueProxy? If it's a ValueProxy, then this is the expected behavior; you'll have to either:

• allow 'null' in your setter (you could treat it as a Boolean.FALSE if you like)
  
• set the property value to Boolean.FALSE on the client-side
• change your property type from 'Boolean' to 'boolean': there's little to no reason to use 'Boolean' if you disallow 'null', just use 'boolean' instead.

On Friday, June 1, 2012 10:39:01 AM UTC+2, Tiago wrote:

Hello all,

I have a bean of type A which contains a property of type X which is a JaxB bean (annotated with @XmlRootElement).

I'm editing this being with the help of an Editor<A>.

One of the properties of X is a Boolean which is initialized as Boolean.FALSE on construction. This property is is annotated with @XmlElement(required=true).

I do not care about this property in my Editor - it is supposed to be used only by the back-end. So I don't define any sub-editor to handle it. I just ignore it.

I use the Editor to create a new instance of A. Both A and X are created via RequestContext.create().

When I submit my modifications to the server, I have the exception copied below. I've put a breakpoint on ReflectiveServiceLayer.setProperty, on the line which calls setter.invoke, and verified that the exception is thrown precisely when the framework tries to attribute 'null' as value to the Boolean property which I mentioned above. That property may not be null.

Is this a bug in the framework, or am I doing something wrong? Am I supposed to create sub-editors for every property of the edited entity?

Here is the exception:

Jun 1, 2012 10:21:20 AM com.google.web.bindery.requestfactory.server.RequestFactoryServlet doPost

SEVERE: Unexpected error

java.lang.IllegalArgumentException

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:597)

at com.google.web.bindery.requestfactory.server.ReflectiveServiceLayer.setProperty(ReflectiveServiceLayer.java:234)

at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.setProperty(ServiceLayerDecorator.java:193)

at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.setProperty(ServiceLayerDecorator.java:193)

at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.setProperty(ServiceLayerDecorator.java:193)

at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor$1.visitValueProperty(SimpleRequestProcessor.java:541)

at com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.traverseProperties(ProxyAutoBean.java:289)

at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.traverse(AbstractAutoBean.java:166)

at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.accept(AbstractAutoBean.java:101)

at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.processOperationMessages(SimpleRequestProcessor.java:516)

at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:210)

at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:127)

at com.google.web.bindery.requestfactory.server.RequestFactoryServlet.doPost(RequestFactoryServlet.java:133)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)

at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1097)

at fr.extelia.smdt.www.server.HttpHeadersFilter.doFilter(HttpHeadersFilter.java:64)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1088)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:311)

at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)

at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)

at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)

at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:101)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)

at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)

at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)

at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)

at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)

at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:173)

at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)

at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1088)

at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)

at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)

at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)

at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)

at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)

at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)

at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

at org.mortbay.jetty.Server.handle(Server.java:324)

at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)

at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)

at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)

at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)

at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)

at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)

at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

[ERROR] 500 - POST /gwtRequest (127.0.0.1) 49595 bytes

   Request headers

      Host: 127.0.0.1:8888

      Connection: keep-alive

      User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.19 (KHTML, like Gecko) Ubuntu/11.10 Chromium/18.0.1025.168 Chrome/18.0.1025.168 Safari/535.19

      Accept: */*

      Accept-Encoding: gzip,deflate,sdch

      Accept-Language: en-US,en;q=0.8,fr-FR;q=0.6,fr;q=0.4,es-419;q=0.2,es;q=0.2,pt-BR;q=0.2,pt;q=0.2

      Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

      Cookie: JSESSIONID=bq6wfphki10f

      Content-Length: 681

      Origin: http://127.0.0.1:8888

      Content-Type: application/json; charset=UTF-8

      Referer: http://127.0.0.1:8888/index.jsp?gwt.codesvr=127.0.0.1:9997

      pageurl: http://127.0.0.1:8888/index.jsp?gwt.codesvr=127.0.0.1:9997#userEdit:

      X-GWT-Permutation: HostedMode

   Response headers

      Content-Type: text/html; charset=utf-8

Thank you for any help.

Best regards,

--
Tiago Rinck Caveden

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