Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.
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and embeddable classes (defined by your application), and use ObjectDB ability to combine Java methods in
[ObjectDB 2.2.5_02] Unexpected exception (Error 990) com.objectdb.o.InternalException: java.lang.NullPointerException: null
; } } And its embedded primary key @Embeddable @Access(AccessType.PROPERTY) public class TimePeriod implements