[jbossseam-issues] [JBoss JIRA] Closed: (JBSEAM-1441) page parameter usage in seam-gen can cause null pointer exception

page parameter usage in seam-gen can cause null pointer exception ----------------------------------------------------------------- Key: JBSEAM-1441 URL: http://jira.jboss.com/jira/browse/JBSEAM-1441 Project: JBoss Seam Issue Type: Bug Affects Versions: 1.3.0.ALPHA Reporter: Norman Richards Assigned To: Gavin King Fix For: 1.3.0.ALPHA When running seam-gen with the example data in release-process.txt, the generated code throws a null pointer when trying to view a vehicle from a the person page. The exception is: 20:30:17,833 ERROR [SeamPhaseListener] uncaught exception java.lang.NullPointerException at org.jboss.seam.pages.Param.getValueFromRequest(Param.java:199) at org.jboss.seam.core.Pages.storeRequestParameterValuesInViewRoot(Pages.java:734) at org.jboss.seam.core.Pages.postRestore(Pages.java:360) at org.jboss.seam.jsf.AbstractSeamPhaseListener.afterRestoreView(AbstractSeamPhaseListener.java:82) at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.java:90) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:280) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:70) at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:64) at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:60) at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:81) at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:47) at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:293) at org.jboss.seam.web.AbstractAjax4jsfFilter.doFilter(AbstractAjax4jsfFilter.java:35) at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:127) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127) at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:613) This seems to occur when a page.xml declares a page parameter with no value but a value is specified in the link.