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Posted to dev@myfaces.apache.org by "Teo Bee Jiunn (JIRA)" <de...@myfaces.apache.org> on 2011/08/19 13:20:27 UTC
[jira] [Commented] (TOMAHAWK-1460) ClassCastException when testing
Tomahawk 1.1.9 table demos when preserveDataModel="true"
[ https://issues.apache.org/jira/browse/TOMAHAWK-1460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13087654#comment-13087654 ]
Teo Bee Jiunn commented on TOMAHAWK-1460:
-----------------------------------------
Hi, i am facing exactly the same problem and would like to know is it the patch solution above can solve the problem? Or we need to upgrade the newer version? Currently I am using jsf 1.1 with tomahawk-1.1.10.jar. Pls see the error below
[8/19/11 19:00:38:348 SGT] 00000051 WebApp E [Servlet Error]-[Faces Servlet]: java.lang.ClassCastException: org.apache.myfaces.component.html.ext.SortableModel incompatible with org.apache.myfaces.component.html.ext._SerializableDataModel
at org.apache.myfaces.component.html.ext.AbstractHtmlDataTable.updateModelFromPreservedDataModel(AbstractHtmlDataTable.java:648)
at org.apache.myfaces.component.html.ext.AbstractHtmlDataTable.processUpdates(AbstractHtmlDataTable.java:634)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:969)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:969)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:969)
at javax.faces.component.UIForm.processUpdates(UIForm.java:196)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:969)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:969)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:969)
at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:401)
at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:83)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:220)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:91)
> ClassCastException when testing Tomahawk 1.1.9 table demos when preserveDataModel="true"
> ----------------------------------------------------------------------------------------
>
> Key: TOMAHAWK-1460
> URL: https://issues.apache.org/jira/browse/TOMAHAWK-1460
> Project: MyFaces Tomahawk
> Issue Type: Bug
> Components: Extended Datatable
> Affects Versions: 1.1.9
> Environment: Mac OS 10.5.8
> JDK 1.6.0
> Mojarra 2.0.0-SNAPSHOT
> Glassfish V3
> Reporter: Ryan Lubke
> Assignee: Leonardo Uribe
> Fix For: 1.1.10
>
>
> When executing 'Paged and Sortable', 'Master-Detail', and 'Optional
> Header/Footer', a class cast exception is raised during post-back operations to
> update the view.
> java.lang.ClassCastException: javax.faces.model.ListDataModel cannot be cast to
> org.apache.myfaces.component.html.ext._SerializableDataModel
> at
> org.apache.myfaces.component.html.ext.AbstractHtmlDataTable.updateModelFromPreservedDataModel(AbstractHtmlDataTable.java:493)
> at
> org.apache.myfaces.component.html.ext.AbstractHtmlDataTable.processUpdates(AbstractHtmlDataTable.java:479)
> at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1108)
> at javax.faces.component.UIForm.processUpdates(UIForm.java:265)
> at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1108)
> at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:1238)
> I've done some debugging here and have found this block of code being executed
> during processRestoreState():
> protected DataModel getDataModel()
> {
> if (_preservedDataModel != null)
> {
> setDataModel(_preservedDataModel);
> _preservedDataModel = null;
> }
> return super.getDataModel();
> }
> The call stack at this point in time is:
> at
> org.apache.myfaces.component.html.ext.AbstractHtmlDataTable.getDataModel(AbstractHtmlDataTable.java:839)
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.setRowIndex(HtmlDataTableHack.java:282)
> at
> org.apache.myfaces.component.html.ext.AbstractHtmlDataTable.setRowIndex(AbstractHtmlDataTable.java:276)
> at javax.faces.component.UIData.visitColumnsAndRows(UIData.java:1539)
> at javax.faces.component.UIData.visitTree(UIData.java:1207)
> at javax.faces.component.UIComponent.visitTree(UIComponent.java:1454)
> at javax.faces.component.UIComponent.visitTree(UIComponent.java:1454)
> at javax.faces.component.UIForm.visitTree(UIForm.java:333)
> at javax.faces.component.UIComponent.visitTree(UIComponent.java:1454)
> at javax.faces.component.UIViewRoot.processRestoreState(UIViewRoot.java:868)
> The interesting point here is that _preserveDataModel is set to null.
> Later, during processUpdates(), updateModelFromPreservedDataModel() will
> call getDataModel (as listed above), however, since _preservedDataModel was set
> to null, the call is delegated to the super class, UIData, which returns
> ListDataModel.
> This change in the code path is new spec required functionality where UIViewRoot.processRestoreState()
> uses the TreeVisitor to notify components of the PostRestoreStateEvent. Given this, I'm sure the
> problem will be manifest with MyFaces 2.0.0.
> WORKAROUND: set preservDataModel to false.
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