Bugs item #1265141, was opened at 2005-08-20 22:53
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Gili Tzabari (cowwoc)
Assigned to: Nobody/Anonymous (nobody)
Summary: HeaderContribution missing validation
Initial Comment:
If I addToHeader() from a component but its markup does
not contain the component I am adding, then no errors
occur up-front but later on (at render time) I get:
java.lang.NullPointerException
at wicket.Component.remove(Component.java:1082)
at wicket.Page.checkRendering(Page.java:936)
at wicket.Page.doRender(Page.java:249)
at wicket.RequestCycle.respond(RequestCycle.java:878)
at wicket.RequestCycle.request(RequestCycle.java:404)
at
wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:193)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:825)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:738)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:526)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
I'm expecting Wicket to do better validation of
addToHeader() and warn me if the component does not
exist in the markup -- like the normal add() does.
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