PostContentHibernateDao.java

package org.iatoki.judgels.raguel.forum.thread.post;

import com.google.common.collect.ImmutableList;
import org.iatoki.judgels.play.model.AbstractJudgelsHibernateDao;
import play.db.jpa.JPA;

import javax.inject.Singleton;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import javax.persistence.metamodel.SingularAttribute;
import java.util.List;

@Singleton
public final class PostContentHibernateDao extends AbstractJudgelsHibernateDao<PostContentModel> implements PostContentDao {

    public PostContentHibernateDao() {
        super(PostContentModel.class);
    }

    @Override
    protected List<SingularAttribute<PostContentModel, String>> getColumnsFilterableByString() {
        return ImmutableList.of(PostContentModel_.subject, PostContentModel_.content);
    }

    @Override
    public long getCountByUserJid(String userJid) {
        CriteriaBuilder cb = JPA.em().getCriteriaBuilder();
        CriteriaQuery<Long> query = cb.createQuery(Long.class);
        Root<PostContentModel> root = query.from(getModelClass());

        query
            .select(cb.count(root))
            .where(cb.equal(root.get(PostContentModel_.userCreate), userJid));

        return JPA.em().createQuery(query).getSingleResult();
    }
}