Throw ClassCastException when cast a JSF dataTable row to a
Below codes will cause a ClassCastException:
FacesContext facesContext = FacesContext.getCurrentInstance();
UIViewRoot root = facesContext.getViewRoot();
UIData table = (UIData)
root.findComponent("listAlldata");
Object row = table.getRowData();
logger.info(" *** the row is " + row);
logger.info(" *** the row classloader is " + row.getClass().getClassLoader());
logger.info(" *** the new WebUser classloader is " + WebUser.class.getClassLoader());
WebUser webUser = (WebUser) row;
--------------------------------------------------------------------------------------
The debug info are:
17:05:54,078 INFO [WebUserListForm] *** the row classloader is org.jboss.mx.lo
ading.UnifiedClassLoader3@70c242{ url=file:/D:/software/jboss-4.0.2/server/all/t
mp/deploy/tmp41284ljsfc.ejb3 ,addedOrder=45}
17:05:54,078 INFO [WebUserListForm] *** the new WebUser classloader is WebappC
lassLoader
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
java.net.FactoryURLClassLoader@19d56e9
17:05:54,078 ERROR [MethodBindingImpl] Exception while invoking expression #{web
UserListForm.showDetail}
java.lang.ClassCastException: cn.com.ljintl.ljsfc.model.WebUser
at cn.com.ljintl.ljsfc.web.WebUserListForm.showDetail(WebUserListForm.ja
va:80)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java
:138)
--------------------------------------------------------------------------------------
The cn.com.ljintl.ljsfc.model.WebUser is very simple ejb3.0 entity class and is included in ljsfc.ejb3.
The client jsp use a JSF dataTable,and there is a ljsfc-client.jar file in the
WEB-INF\lib which also include a cn.com.ljintl.ljsfc.model.WebUser class.
The JSF codes are:
<x:dataTable id="listAlldata"
styleClass="scrollerTable"
headerClass="standardTable_Header"
footerClass="standardTable_Header"
rowClasses="standardTable_Row1,standardTable_Row2"
columnClasses="standardTable_Column,standardTable_ColumnCentered,standardTable_Column"
var="webUser"
value="#{webUserListForm.list}"
preserveDataModel="true"
rows="10"
>
<h:column>
<f:facet name="header">
</f:facet>
<x:commandLink action="#{webUserListForm.showDetail}" immediate="true" >
<h:outputText value="#{webUser.loginId}" />
</x:commandLink>
</h:column>
================================================
How can i fix such bug?