I this bug is still reproducible in the same conditions with Hibernate 4.3.4.Final.

java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.Integer
at org.hibernate.type.descriptor.java.IntegerTypeDescriptor.unwrap(IntegerTypeDescriptor.java:36) ~[hibernate-core-4.3.4.Final.jar:4.3.4.Final]
at org.hibernate.type.descriptor.sql.IntegerTypeDescriptor$1.doBind(IntegerTypeDescriptor.java:64) ~[hibernate-core-4.3.4.Final.jar:4.3.4.Final]
[...]