pageparameters is used for passing parameters on the url, so it only
supports strings or whatever you can convert to a string.

-igor

On Fri, Sep 26, 2008 at 9:35 PM, fish3934 <[EMAIL PROTECTED]> wrote:
>  Hi All,
>    I wanted to pass an object from one page to another page,so
>    I set an object into a parameter:
>    PageParameters  para=new PageParameters();
>    para.put("result",resultList);//resultList is a List contains some pojo.
>    //jump to another page
>    setResponsePage(DeviceEnquiry.class,para);
>
>    Then at DeviceEnquiry.java ,I want to get resultList:
>    class DeviceEnquiry extends WebPage
>    {
>      public DeviceEnquiry (PageParameters  param)
>      {
>          List list = (List)param.get("result");
>          //....
>        }
>     }
>
>  But I got an exception:
>
>
> WicketMessage: Can't instantiate page using constructor public 
> com.hk.xportal.xseries.enquiry.DeviceEnquiry(org.apache.wicket.PageParameters)
>  and argument result = "[EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL 
> PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL 
> PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]"
>
> Root cause:
>
> java.lang.ClassCastException: [Ljava.lang.String;
>     at 
> com.hk.xportal.xseries.enquiry.DeviceEnquiry.<init>(DeviceEnquiry.java:16)
>     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>     at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
>     at 
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:147)
>     at 
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:88)
>     at 
> org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:268)
>     at 
> org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:283)
>     at 
> org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:210)
>     at 
> org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)
>     at 
> org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1171)
>     at org.apache.wicket.RequestCycle.step(RequestCycle.java:1248)
>     at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1349)
>     at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)
>     at 
> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:387)
>     at 
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:199)
>     at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
>     at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
>     at 
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
>     at 
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
>     at 
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>     at 
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
>     at 
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
>     at 
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
>     at 
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
>     at 
> org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
>     at 
> org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
>     at 
> org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
>     at 
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
>     at java.lang.Thread.run(Thread.java:595)
>
> Complete stack:
>
> org.apache.wicket.WicketRuntimeException: Can't instantiate page using 
> constructor public 
> com.hk.xportal.xseries.enquiry.DeviceEnquiry(org.apache.wicket.PageParameters)
>  and argument result = "[EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL 
> PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL 
> PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]"
>     at 
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:168)
>     at 
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:88)
>     at 
> org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:268)
>     at 
> org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:283)
>     at 
> org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:210)
>     at 
> org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)
>     at 
> org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1171)
>     at org.apache.wicket.RequestCycle.step(RequestCycle.java:1248)
>     at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1349)
>     at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)
>     at 
> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:387)
>
> //....
>
>
>

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