[Echo-list] Grid NPE in 1.1 (latest in dev1.1 branch)

[Lendvai A. <Att...@ne...>]

hi!

I'm getting exceptions like below from Grid...

I suggest adding some serious asserting for the valid/invalid state in
Grid.java.

I'm using it from Tomcat 5 inside JBoss 3.2.5 - I doubt it's a threading
broblem.

adding a NP check for autoPositionedCellPositions and returning an empty
iterator fixes the problem, only my cells are not displayed of course.

hope it helps,

- 101


java.lang.NullPointerException
        at nextapp.echo.Grid.iterator(Grid.java:1246)
        at
nextapp.echoservlet.ui.GridRenderingModel.<init>(GridRenderingModel.java
:225)
        at nextapp.echoservlet.ui.GridUI.render(GridUI.java:65)
        at echopoint.ui.PanelUI.render(PanelUI.java:95)
        at echopoint.ui.PanelUI.render(PanelUI.java:95)
        at
echopoint.ui.layout.GridLayoutManagerUI._renderPeer(GridLayoutManagerUI.
java:196)
        at
echopoint.ui.layout.GridLayoutManagerUI.render(GridLayoutManagerUI.java:
306)
        at echopoint.ui.PanelUI.render(PanelUI.java:92)
        at
nextapp.echoservlet.ContentPaneUI.service(ContentPaneUI.java:265)
        at nextapp.echoservlet.Connection.process(Connection.java:449)
        at nextapp.echoservlet.EchoServer.process(EchoServer.java:304)
        at nextapp.echoservlet.EchoServer.doGet(EchoServer.java:214)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:237)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:157)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:214)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo
ntext.java:104)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:5
20)
        at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardCon
textValve.java:198)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:152)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo
ntext.java:104)
        at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAs
sociationValve.java:72)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo
ntext.java:102)
        at
org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurity
MgrRealm.java:275)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo
ntext.java:102)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:5
20)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:137)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo
ntext.java:104)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:117)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo
ntext.java:102)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:5
20)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:109)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo
ntext.java:104)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:5
20)
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
        at
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
        at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:79
9)
        at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processC
onnection(Http11Protocol.java:705)
        at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:57
7)
        at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
.java:683)
        at java.lang.Thread.run(Thread.java:534)