Return-Path: Delivered-To: apmail-cocoon-dev-archive@www.apache.org Received: (qmail 70708 invoked from network); 21 Apr 2004 21:01:30 -0000 Received: from daedalus.apache.org (HELO mail.apache.org) (208.185.179.12) by minotaur-2.apache.org with SMTP; 21 Apr 2004 21:01:30 -0000 Received: (qmail 96725 invoked by uid 500); 21 Apr 2004 21:01:15 -0000 Delivered-To: apmail-cocoon-dev-archive@cocoon.apache.org Received: (qmail 96670 invoked by uid 500); 21 Apr 2004 21:01:14 -0000 Mailing-List: contact dev-help@cocoon.apache.org; run by ezmlm Precedence: bulk list-help: list-unsubscribe: list-post: Reply-To: dev@cocoon.apache.org Delivered-To: mailing list dev@cocoon.apache.org Received: (qmail 96649 invoked from network); 21 Apr 2004 21:01:13 -0000 Received: from unknown (HELO mysza.ekom.net.pl) (217.153.51.186) by daedalus.apache.org with SMTP; 21 Apr 2004 21:01:13 -0000 Received: from ouzo by mysza.ekom.net.pl with local (Exim 4.24) id 1BGOqM-0001R5-S8 for dev@cocoon.apache.org; Wed, 21 Apr 2004 23:01:18 +0200 Date: Wed, 21 Apr 2004 23:01:18 +0200 From: Leszek Gawron To: dev@cocoon.apache.org Subject: Re: Handling Iterators in JXTG Message-ID: <20040421210118.GA5490@wlkp.org> References: <20040421193034.GA4389@wlkp.org> <4086CF6A.9090900@verizon.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4086CF6A.9090900@verizon.net> User-Agent: Mutt/1.4.1i X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N X-Spam-Rating: minotaur-2.apache.org 1.6.2 0/1000/N On Wed, Apr 21, 2004 at 12:45:46PM -0700, Christopher Oliver wrote: > Leszek Gawron wrote: > > >Am I wrong or there is no way to handle iterators in JXTG? One can use > >forEach > >for collections but I sometimes would like to pass and iterator to a view > >to > >process larger result sets. > > > >In Hibernate you can: > > > >var list = session.createQuery("from LargeTable").list() which creates a > >whole > >collection at once but you can also do: > > > >var iterator = session.createQuery("from LargeTable").iterate() which makes > >generating view much less memory consuming. > > > >Maybe something like: > > > > > > ${current.value}
> > > > > >The syntax is ugly I know but after a little tuning it would be very > >useful. > > lg > > > > > should work on Iterators (as well Enumerations): > > sendPage("page.html", {iteration: session.createQuery("from > LargeTable").iterate()}); > > > ${current.value}
> > > > Chris I am afraid this does not work. The one with .list() does. the one with iterate() gives this exception: Original Exception: java.lang.NullPointerException at org.apache.cocoon.generation.JXTemplateGenerator.execute(JXTemplateGenerator.java:3328) at org.apache.cocoon.generation.JXTemplateGenerator.performGeneration(JXTemplateGenerator.java:2952) at org.apache.cocoon.generation.JXTemplateGenerator.generate(JXTemplateGenerator.java:2943) at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:546) at org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:173) at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:490) at org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(SerializeNode.java:120) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:49) at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:130) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:126) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:101) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:336) at org.apache.cocoon.components.treeprocessor.TreeProcessor.handleCocoonRedirect(TreeProcessor.java:382) at org.apache.cocoon.components.treeprocessor.TreeProcessor.access$000(TreeProcessor.java:66) at org.apache.cocoon.components.treeprocessor.TreeProcessor$TreeProcessorRedirector.cocoonRedirect(TreeProcessor.java:543) at org.apache.cocoon.environment.ForwardRedirector.redirect(ForwardRedirector.java:58) at org.apache.cocoon.components.flow.AbstractInterpreter.forwardTo(AbstractInterpreter.java:176) at org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.forwardTo(FOM_JavaScriptInterpreter.java:812) at org.apache.cocoon.components.flow.javascript.fom.FOM_Cocoon.forwardTo(FOM_Cocoon.java:1479) at org.apache.cocoon.components.flow.javascript.fom.FOM_Cocoon.jsFunction_sendPage(FOM_Cocoon.java:266) at inv10.invoke() at org.mozilla.javascript.FunctionObject.doInvoke(FunctionObject.java:523) at org.mozilla.javascript.FunctionObject.call(FunctionObject.java:438) at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1244) at org.mozilla.javascript.continuations.ContinuationInterpreter.interpret(ContinuationInterpreter.java:1134) at org.mozilla.javascript.continuations.ContinuationInterpreter.interpret(ContinuationInterpreter.java:190) at org.mozilla.javascript.continuations.ContinuationInterpreter.interpret(ContinuationInterpreter.java:138) at org.mozilla.javascript.continuations.InterpretedFunctionImpl.call(InterpretedFunctionImpl.java:121) at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1244) at org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.callFunction(FOM_JavaScriptInterpreter.java:686) at org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke(CallFunctionNode.java:130) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:49) at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:130) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:126) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:101) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:336) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:277) at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:103) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:49) at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:130) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:126) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:101) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:336) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:277) at org.apache.cocoon.Cocoon.process(Cocoon.java:619) at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1074) 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$Chain.doFilter(WebApplicationHandler.java:342) at com.mobilebox.hibernate.PersistenceManager.doFilter(PersistenceManager.java:65) at org.mortbay.jetty.servlet.WebApplicationHandler$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:1808) at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:525) at org.mortbay.http.HttpContext.handle(HttpContext.java:1758) 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:197) at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289) at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:496) Original Exception: java.lang.NullPointerException at org.apache.commons.jexl.util.introspection.UberspectImpl.getIterator(UberspectImpl.java:133) at org.apache.cocoon.generation.JXTemplateGenerator$JSIntrospector.getIterator(JXTemplateGenerator.java:715) at org.apache.cocoon.generation.JXTemplateGenerator.execute(JXTemplateGenerator.java:3284) at org.apache.cocoon.generation.JXTemplateGenerator.performGeneration(JXTemplateGenerator.java:2952) at org.apache.cocoon.generation.JXTemplateGenerator.generate(JXTemplateGenerator.java:2943) at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:546) at org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:173) at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:490) at org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(SerializeNode.java:120) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:49) at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:130) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:126) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:101) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:336) at org.apache.cocoon.components.treeprocessor.TreeProcessor.handleCocoonRedirect(TreeProcessor.java:382) at org.apache.cocoon.components.treeprocessor.TreeProcessor.access$000(TreeProcessor.java:66) at org.apache.cocoon.components.treeprocessor.TreeProcessor$TreeProcessorRedirector.cocoonRedirect(TreeProcessor.java:543) at org.apache.cocoon.environment.ForwardRedirector.redirect(ForwardRedirector.java:58) at org.apache.cocoon.components.flow.AbstractInterpreter.forwardTo(AbstractInterpreter.java:176) at org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.forwardTo(FOM_JavaScriptInterpreter.java:812) at org.apache.cocoon.components.flow.javascript.fom.FOM_Cocoon.forwardTo(FOM_Cocoon.java:1479) at org.apache.cocoon.components.flow.javascript.fom.FOM_Cocoon.jsFunction_sendPage(FOM_Cocoon.java:266) at inv10.invoke() at org.mozilla.javascript.FunctionObject.doInvoke(FunctionObject.java:523) at org.mozilla.javascript.FunctionObject.call(FunctionObject.java:438) at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1244) at org.mozilla.javascript.continuations.ContinuationInterpreter.interpret(ContinuationInterpreter.java:1134) at org.mozilla.javascript.continuations.ContinuationInterpreter.interpret(ContinuationInterpreter.java:190) at org.mozilla.javascript.continuations.ContinuationInterpreter.interpret(ContinuationInterpreter.java:138) at org.mozilla.javascript.continuations.InterpretedFunctionImpl.call(InterpretedFunctionImpl.java:121) at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1244) at org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.callFunction(FOM_JavaScriptInterpreter.java:686) at org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke(CallFunctionNode.java:130) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:49) at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:130) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:126) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:101) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:336) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:277) at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:103) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:49) at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:130) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:126) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:72) at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:101) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:336) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:277) at org.apache.cocoon.Cocoon.process(Cocoon.java:619) at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1074) 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$Chain.doFilter(WebApplicationHandler.java:342) at com.mobilebox.hibernate.PersistenceManager.doFilter(PersistenceManager.java:65) at org.mortbay.jetty.servlet.WebApplicationHandler$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:1808) at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:525) at org.mortbay.http.HttpContext.handle(HttpContext.java:1758) 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:197) at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289) at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:496) -- __ | / \ | Leszek Gawron // \\ \_\\ //_/ ouzo@wlkp.org _\\()//_ .'/()\'. Phone: +48(501)720812 / // \\ \ \\ // recursive: adj; see recursive | \__/ |