This is part of JPA 2.0.
KEY(identification_variable)
@see KeyExpression @version 2.4 @since 2.4 @author Pascal Filion
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* {@inheritDoc} */ @Override public void visit(KeyExpression expression) { KeyExpressionStateObject stateObject = new KeyExpressionStateObject( parent, literal(expression.getExpression(), LiteralType.IDENTIFICATION_VARIABLE) ); stateObject.setExpression(expression); this.stateObject = stateObject; }