/**
* Returns the {@link JPQLGrammar} that will help to validate the JPQL query grammatically and
* semantically (contextually). It will also checks if any specific feature added to that grammar
* is allowed. For instance, if the JPQL query has functions defined for EclipseLink grammar but
* the validation level is set for generic JPA, then an exception will be thrown.
*
* @return The {@link JPQLGrammar} written for a specific JPA version or for the current version
* of EclipseLink
*/
private JPQLGrammar jpqlGrammar() {
if (validationLevel == ParserValidationType.EclipseLink) {
return DefaultEclipseLinkJPQLGrammar.instance();
}
if (validationLevel == ParserValidationType.JPA10) {
return JPQLGrammar1_0.instance();
}
if (validationLevel == ParserValidationType.JPA20) {
return JPQLGrammar2_0.instance();
}
if (validationLevel == ParserValidationType.JPA21) {
return JPQLGrammar2_1.instance();
}
return DefaultEclipseLinkJPQLGrammar.instance();
}
/** {@inheritDoc} */
public JPQLGrammar getGrammar() {
return JPQLGrammar2_0.instance();
}