Classcast exception while click on metadata against a folder in Resource Folder

[mamtay...@gmail.com]

Hi,

 

While i created a folder under Resource Folder of Learning Resources tab.

Clicking on metadata icon to edit metadata, giving following classcast exception;

Throwable: java.lang.ClassCastException

message:org.olat.core.util.vfs.LocalFolderImpl cannot be cast to org.olat.core.util.vfs.OlatRelPathImpl,java.lang.ClassCastException

at org.olat.core.commons.modules.bc.meta.MetaInfoFormController.initForm(MetaInfoFormController.java:214)
at org.olat.core.gui.components.form.flexible.impl.FormBasicController.initForm(FormBasicController.java:215)
at org.olat.core.commons.modules.bc.meta.MetaInfoFormController.(MetaInfoFormController.java:100)
at org.olat.core.commons.modules.bc.commands.CmdEditMeta.execute(CmdEditMeta.java:101)
at org.olat.core.commons.modules.bc.FolderRunController.event(FolderRunController.java:386)
at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:195)
at org.olat.core.gui.components.Component$1.run(Component.java:238)
at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
at org.olat.core.gui.components.Component.fireEvent(Component.java:236)
at org.olat.core.commons.modules.bc.components.FolderComponent.doDispatchRequest(FolderComponent.java:147)

 

 

To fix this i have done changes in LocalFolderImpl  by adding OlatRelPathImpl

 

public class LocalFolderImpl extends LocalImpl implements VFSContainer,OlatRelPathImpl

 

overriding following method

public String getRelPath() {
return folderRelPath;
}

In this i am not able to understand what shuld be the value of folderRelPath.

Its giving Null pointer exception while create a new folder in following block

if
 (item instanceof OlatRelPathImpl) {
// update meta data
MetaInfo meta =
meta.setAuthor(ureq.getIdentity());
meta.write();
}
fireEvent(ureq, Event.
DONE_EVENT);

Meta is returned as Null because in MetaInfoFactory.java originFile.exists() condition gets false and it returns canonicalMetaPath  null

if(originFile == null || !originFile.exists()) {
canonicalMetaPath =null;
}

Please let me know how can i fix this classcast exception without impacting other functionality.

Please revert asap.

 

Thanks,

Mamta.

 

 

[Florian Gnägi]

Hi Mamta

On what OpenOLAT version did you get this error? I guess we refactored quite a bit there, I don’t get this error on the latest OpenOLAT build. 

I can not say if your changes are ok, this needs a deep look into the issue. The VFS code is complex and unfortunately has many casts that should not be done. So, it is too risky for me to give you any advice here without taking some serious time. Please compare the code with the lastest from the OpenOLAT repository, maybe you can merge some things back to your code base. 

Cheers

Florian

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