Examples with CountMappingResolver com.evolveum.midpoint.repo.sqale.mapping.CountMappingResolver used on opensource projects

Example 1 with CountMappingResolver

use of com.evolveum.midpoint.repo.sqale.mapping.CountMappingResolver in project midpoint by Evolveum.

the class ExistsFilterProcessor method process.

private <TQ extends FlexibleRelationalPathBase<TR>, TR> Predicate process(ItemPath path, ExistsFilter filter) throws RepositoryException {
    if (path.isEmpty()) {
        ObjectFilter innerFilter = filter.getFilter();
        // empty filter means EXISTS, NOT can be added before the filter
        return innerFilter != null ? context.process(innerFilter) : null;
    }
    ItemRelationResolver<Q, R, TQ, TR> resolver = mapping.relationResolver(path);
    // "Clean" solution would require more classes/code and would be more confusing.
    if (resolver instanceof CountMappingResolver<?, ?>) {
        return ((CountMappingResolver<Q, R>) resolver).createExistsPredicate(context);
    }
    ItemRelationResolver.ResolutionResult<TQ, TR> resolution = resolver.resolve(context);
    // noinspection unchecked
    SqaleQueryContext<?, TQ, TR> subcontext = (SqaleQueryContext<?, TQ, TR>) resolution.context;
    if (!(resolution.mapping instanceof QueryTableMapping)) {
        throw new QueryException("Repository supports exists only for multi-value containers (for now)");
    }
    ExistsFilterProcessor<TQ, TR> nestedProcessor = new ExistsFilterProcessor<>(subcontext, resolution.mapping);
    Predicate predicate = nestedProcessor.process(path.rest(), filter);
    if (resolution.subquery) {
        return subcontext.sqlQuery().where(predicate).exists();
    } else {
        return predicate;
    }
}