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setting activation code in persistence.xml or env file or system properties

Wondering if it's possible to add the activation code either: - in persistence.xml - or in a .env file - or system properties dmoshal David Moshal These options are not supported. However, you can embed the configuration file

Programatic configuration or configuration file loaded from classpath or file

my own jar and have it loaded by classloader? If one or both are possible

or(restrictions)

/jpa/criteria/Predicate" title="Interface in javax.persistence.criteria">Predicate or(  ... - zero or more restriction predicates Returns: or predicate

or(x, y)

/jpa/criteria/Predicate" title="Interface in javax.persistence.criteria">Predicate or(  ... > Returns: or predicate

or(x, y)

/jpa/criteria/Predicate" title="Interface in javax.persistence.criteria">Predicate or(  ... Returns: or

Predicate.BooleanOperator.OR

OR Since: JPA 2.0

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Logical "or" works not correcly when field is @Id and first position

The following code doesn't respect the logical "or" correctly. Instead of returns all 2 datasets it returns only this one, which matches the first predicate in the or. BUT: this happens only, if the field for the "or" is the first one defined as @Id.

Which API should I use - JPA or JDO?

You can use ObjectDB with either the Java Persistence API (JPA) or the Java Data Objects (JDO) API. Both share similar architecture, design and abilities. When to prefer JPA JPA is more commonly used. Therefore, it might be the first choice for most new