Hibernate: ClassCast Exception

Question

I am trying to fetch the FileRepository row with maximum version for a particular fileId. But following exception is thrown:

java.lang.ClassCastException: java.lang.Integer cannot be cast to com.xxx.xxx.xxx.FileRepository

fileRepo = (FileRepository)session.createCriteria(FileRepository.class,"fileRepository")
                   .createAlias("fileRepository.file", "file")
                   .add(Restrictions.eq("file.fileId", file.getFileId()))
                   .setProjection(Projections.max("version")).uniqueResult();

score 2 · Accepted Answer · answered Oct 08 '15 at 09:34

2

.setProjection(Projections.max("version")).uniqueResult();

Projection means receiving particular column values instead of rows.

If you see this making returning the ciriteria only version number which is an Int. Hence the error.

Either remove this projection or receive an int.

answered Oct 08 '15 at 09:34

Suresh Atta

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Thanks, So, How do I get a row with maximum version with hibernate criteria? – Forkmohit Oct 08 '15 at 09:38
@Forkmohit Instead of projection, add restriction for the same :) – Suresh Atta Oct 08 '15 at 09:40
found answer, with detachedcriteria. http://stackoverflow.com/questions/3900105/get-record-with-max-id-using-hibernate-criteria – Forkmohit Oct 08 '15 at 09:44

Hibernate: ClassCast Exception

1 Answers1