Okay, I found the error - I used a wrong datatype for the matchExpression. Well, in fact this is a stupid mistake by me; but in my opinion the framework could handle this more smoothly.
Just told you this nice exception as a illustration on how difficult it could become working with cayenne if one is just a bit hasty on cayennes use. I think that hibernate in this context is more reliable; but therefore requires more work to be running at first. But dont want to talk about that now. Greets Jan > From: [EMAIL PROTECTED] > To: user@cayenne.apache.org > Subject: RE: Deletion of obejcts > Date: Wed, 21 Nov 2007 22:38:34 +0000 > > Hey Kevin, > > here is one of those exceptions I cannot get used to: > > java.lang.NullPointerException > at > org.apache.cayenne.access.trans.QualifierTranslator.appendObjectMatch(QualifierTranslator.java:153) > at > org.apache.cayenne.access.trans.QualifierTranslator.endNode(QualifierTranslator.java:321) > at org.apache.cayenne.exp.Expression.traverse(Expression.java:520) > at org.apache.cayenne.exp.Expression.traverse(Expression.java:511) > at org.apache.cayenne.exp.Expression.traverse(Expression.java:491) > at > org.apache.cayenne.access.trans.QualifierTranslator.doTranslation(QualifierTranslator.java:74) > at > org.apache.cayenne.access.trans.SelectTranslator.createSqlString(SelectTranslator.java:129) > at > org.apache.cayenne.access.trans.QueryAssembler.createStatement(QueryAssembler.java:95) > at > org.apache.cayenne.access.jdbc.SelectAction.performAction(SelectAction.java:71) > at > org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:59) > at org.apache.cayenne.access.DataNode.performQueries(DataNode.java:273) > at > org.apache.cayenne.access.DataDomainQueryAction.runQuery(DataDomainQueryAction.java:301) > at > org.apache.cayenne.access.DataDomainQueryAction.access$000(DataDomainQueryAction.java:60) > at > org.apache.cayenne.access.DataDomainQueryAction$1.transform(DataDomainQueryAction.java:273) > at > org.apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java:836) > at > org.apache.cayenne.access.DataDomainQueryAction.runQueryInTransaction(DataDomainQueryAction.java:270) > at > org.apache.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:110) > at org.apache.cayenne.access.DataDomain.onQuery(DataDomain.java:746) > at > org.apache.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:217) > at > org.apache.cayenne.access.DataContextQueryAction.execute(DataContextQueryAction.java:54) > at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1387) > at > org.apache.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:217) > at > org.apache.cayenne.access.DataContextQueryAction.execute(DataContextQueryAction.java:54) > at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1387) > at > org.apache.cayenne.access.DataContext.performQuery(DataContext.java:1376) > at > ams.maintabpanes.buchungdetail.SingleBuchungContentPaneCatering.<init>(SingleBuchungContentPaneCatering.java:195) > at > ams.maintabpanes.buchungdetail.BuchungDetailWindowPane.<init>(BuchungDetailWindowPane.java:103) > at > ams.maintabpanes.event.EventTabPane$4.actionPerformed(EventTabPane.java:522) > at > nextapp.echo2.app.button.AbstractButton.fireActionPerformed(AbstractButton.java:135) > at > nextapp.echo2.app.button.AbstractButton$1.actionPerformed(AbstractButton.java:100) > at > nextapp.echo2.app.button.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:70) > at > nextapp.echo2.app.button.DefaultButtonModel.doAction(DefaultButtonModel.java:58) > at > nextapp.echo2.app.button.AbstractButton.doAction(AbstractButton.java:121) > at > nextapp.echo2.app.button.AbstractButton.processInput(AbstractButton.java:506) > at > nextapp.echo2.app.update.ClientUpdateManager.process(ClientUpdateManager.java:116) > at > nextapp.echo2.app.update.UpdateManager.processClientUpdates(UpdateManager.java:89) > at > nextapp.echo2.webcontainer.ContainerSynchronizeService.renderUpdate(ContainerSynchronizeService.java:472) > at > nextapp.echo2.webrender.service.SynchronizeService.service(SynchronizeService.java:279) > at > nextapp.echo2.webrender.WebRenderServlet.process(WebRenderServlet.java:276) > at > nextapp.echo2.webrender.WebRenderServlet.doPost(WebRenderServlet.java:192) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) > at ams.AMSServlet.service(AMSServlet.java:36) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:356) > at > org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:342) > at > org.apache.cayenne.conf.WebApplicationContextFilter.doFilter(WebApplicationContextFilter.java:91) > at > org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:334) > at > org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:286) > at > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567) > at org.mortbay.http.HttpContext.handle(HttpContext.java:1776) > at > org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:514) > at org.mortbay.http.HttpContext.handle(HttpContext.java:1726) > at org.mortbay.http.HttpServer.service(HttpServer.java:879) > at org.mortbay.http.HttpConnection.service(HttpConnection.java:790) > at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:952) > at org.mortbay.http.HttpConnection.handle(HttpConnection.java:807) > at > org.mortbay.http.SocketListener.handleConnection(SocketListener.java:196) > at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289) > at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:487) > > > Well, the only thing I was doing was setting up a select query end performing > the query. I received this. > > How shall someone solve this issue without having a look into cayenne's > sources? > I developed quite a few frameworks for company-internal uses and I am ALWAYS > checking, if all possible exceptions are correctly caught and at least giving > a possible reasong for an exception. For now, I did not solve the problem but > guess, there something wrong in my statement; but even if: The framework > should handle this more gently telling me where the problem exactly lies. > > Thanks a lot. > > Jan > > > > Date: Mon, 19 Nov 2007 20:16:04 -0500 > > Subject: Re: Deletion of obejcts > > From: [EMAIL PROTECTED] > > To: user@cayenne.apache.org > > > > If you're having another issue, please start a new thread and post the > > relevant code snippets and exception message. I'll be the first to beat up > > on Cayenne's error messages, so if you can give concrete examples of where > > they fail, I'll try to get them fixed for you. > > > > > > On 11/19/07 7:10 PM, "Jan Lendholt" <[EMAIL PROTECTED]> wrote: > > > > > Thanks all for your replies. I will try that one out (deleting an > > > iterator). > > > > > > but, yet another problem: Ich use an object and say: > > > object.removeFromTestArray(Test); > > > Afterwards I call Test.getDataContext().commitChanges() to make these > > > changes > > > persistent; but all I get is a "Null Objectid" exception which is yet > > > again an > > > exception which requires a good overview over cayenne's internals; to me > > > and > > > all my people around these error messages cayenne throws are not just a > > > bit > > > intuitive :( > > > > > > _________________________________________________________________ > > > Neu: Internet Explorer 7 optimiert für MSN! > > > http://optimize.de.msn.com/default.aspx?mkt=de-de > > > > -- > > Kevin Menard > > Servprise International, Inc. > > Remote reboot & power control for network equipment > > www.servprise.com +1 508.892.3823 x308 > > > > _________________________________________________________________ > Windows Live Fotogalerie: So einfach organisieren Sie Ihre Fotos! > http://get.live.com/photogallery/overview _________________________________________________________________ Jetzt kostenlos downloaden: 30 Messenger Emoticons! http://www.messenger-emoticons.de/
