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:
> ><jx:while test="${it.hasNext()}">
> > <jx:set car="current" value=${it.next()}/>
> > ${current.value}<br/>
> ></jx:while>
> >
> >The syntax is ugly I know but after a little tuning it would be very
> >useful.
> > lg
> >
> >
> <jx:forEach> should work on Iterators (as well Enumerations):
>
> sendPage("page.html", {iteration: session.createQuery("from
> LargeTable").iterate()});
>
> <jx:forEach var="current" items="${iteration}">
> ${current.value}</br>
> </jx:forEach>
>
>
> 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 // \\
\_\\ //_/ [EMAIL PROTECTED] _\\()//_
.'/()\'. Phone: +48(501)720812 / // \\ \
\\ // recursive: adj; see recursive | \__/ |
