Fast Object Database for Java - with JPA/JDO support

ObjectDB ObjectDB

isNull() - JPA Expression's method

Create a predicate to test whether the expression is null.

Returns:: predicate testing whether the expression is null

Since:: JPA 2.0

This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.

Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.

ObjectDB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.