createChild returns null...
Hi,
I am using SunONE studio to develop JATO applications.
I created a ViewBean with some components and ran it
successfully. Now, I added a button and tried to execute
it, I am getting this exception. I checked the peer JSP
file - I could see the corresponding jato:button tag with
the right values being created.
I also checked the ViewBean code, inside createChildReserved() - I see the code for constructing
this new button object with the correct name.
(I'm attaching relevant code, which has been generated
by the UI builder).
Any ideas where the error could be?
thanks
vignesh
Code snippets:
...inside registerChildren()-->
registerChild(CHILD_SAVE_TOP,com.iplanet.jato.view.BasicCommandField.class);
....
....inside createChildReserved()-->
else if (name.equals(CHILD_SAVE_TOP)) {
com.iplanet.jato.view.BasicCommandFieldchild =new
com.iplanet.jato.view.BasicCommandField(this,
CHILD_SAVE_TOP);
child.setValue( " Save ");
return child;
}
....
....
public static final String CHILD_SAVE_TOP ="saveTop";
2003-04-03 13:55:11 Application Error
java.lang.IllegalArgumentException: Invalid child name "saveTop" (createChild() method returned null)
at com.iplanet.jato.view.ContainerViewBase.ensureChild(ContainerViewBase.java:192)
at com.iplanet.jato.view.ContainerViewBase.getChild(ContainerViewBase.java:538)
at com.iplanet.jato.taglib.html.ButtonTag.doEndTag(ButtonTag.java:67)
at org.apache.jsp.Filter$jsp._jspService(Filter$jsp.java:386)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet$JspServletWrapper.se rvice(IDEJspServlet.java:173)
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.serviceJspFile(IDEJs pServlet.java:246)
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.service(IDEJspServle t.java:339)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.jav a:679)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher. java:431)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.ja va:355)
at com.iplanet.jato.view.ViewBeanBase.forward(ViewBeanBase.java:340)
at com.iplanet.jato.view.ViewBeanBase.forwardTo(ViewBeanBase.java:261)
at com.iplanet.jato.ApplicationServletBase.dispatchRequest(ApplicationServletBase. java:776)
at com.iplanet.jato.ApplicationServletBase.processRequest(ApplicationServletBase.j ava:432)
at com.iplanet.jato.ApplicationServletBase.doPost(ApplicationServletBase.java:324)
at com.iplanet.jato.ApplicationServletBase.doGet(ApplicationServletBase.java:294)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFil terChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain .java:193)
at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.ja va:223)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFil terChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain .java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 243)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java: 201)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.netbeans.modules.web.monitor.catalina.MonitorValve.invoke(MonitorValve.java :142)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.jav a:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:16 3)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:101 1)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1106)
at java.lang.Thread.run(Thread.java:536)
