Example usage for javax.persistence.criteria Subquery from

Introduction

In this page you can find the example usage for javax.persistence.criteria Subquery from.

Prototype

<X> Root<X> from(Class<X> entityClass);

Source Link

Document

Create and add a query root corresponding to the given entity, forming a cartesian product with any existing roots.

Usage

From source file:net.groupbuy.dao.impl.ArticleDaoImpl.java

public Page<Article> findPage(ArticleCategory articleCategory, List<Tag> tags, Pageable pageable) {
    CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
    CriteriaQuery<Article> criteriaQuery = criteriaBuilder.createQuery(Article.class);
    Root<Article> root = criteriaQuery.from(Article.class);
    criteriaQuery.select(root);/*ww w.ja va2s  . com*/
    Predicate restrictions = criteriaBuilder.conjunction();
    restrictions = criteriaBuilder.and(restrictions, criteriaBuilder.equal(root.get("isPublication"), true));
    if (articleCategory != null) {
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.or(criteriaBuilder.equal(root.get("articleCategory"), articleCategory),
                        criteriaBuilder.like(root.get("articleCategory").<String>get("treePath"),
                                "%" + ArticleCategory.TREE_PATH_SEPARATOR + articleCategory.getId()
                                        + ArticleCategory.TREE_PATH_SEPARATOR + "%")));
    }
    if (tags != null && !tags.isEmpty()) {
        Subquery<Article> subquery = criteriaQuery.subquery(Article.class);
        Root<Article> subqueryRoot = subquery.from(Article.class);
        subquery.select(subqueryRoot);
        subquery.where(criteriaBuilder.equal(subqueryRoot, root), subqueryRoot.join("tags").in(tags));
        restrictions = criteriaBuilder.and(restrictions, criteriaBuilder.exists(subquery));
    }
    criteriaQuery.where(restrictions);
    criteriaQuery.orderBy(criteriaBuilder.desc(root.get("isTop")));
    return super.findPage(criteriaQuery, pageable);
}

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From source file:net.groupbuy.dao.impl.ArticleDaoImpl.java

public List<Article> findList(ArticleCategory articleCategory, List<Tag> tags, Integer count,
        List<Filter> filters, List<Order> orders) {
    CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
    CriteriaQuery<Article> criteriaQuery = criteriaBuilder.createQuery(Article.class);
    Root<Article> root = criteriaQuery.from(Article.class);
    criteriaQuery.select(root);/*from  w  ww  .  j  a  v a 2s  .  c om*/
    Predicate restrictions = criteriaBuilder.conjunction();
    restrictions = criteriaBuilder.and(restrictions, criteriaBuilder.equal(root.get("isPublication"), true));
    if (articleCategory != null) {
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.or(criteriaBuilder.equal(root.get("articleCategory"), articleCategory),
                        criteriaBuilder.like(root.get("articleCategory").<String>get("treePath"),
                                "%" + ArticleCategory.TREE_PATH_SEPARATOR + articleCategory.getId()
                                        + ArticleCategory.TREE_PATH_SEPARATOR + "%")));
    }
    if (tags != null && !tags.isEmpty()) {
        Subquery<Article> subquery = criteriaQuery.subquery(Article.class);
        Root<Article> subqueryRoot = subquery.from(Article.class);
        subquery.select(subqueryRoot);
        subquery.where(criteriaBuilder.equal(subqueryRoot, root), subqueryRoot.join("tags").in(tags));
        restrictions = criteriaBuilder.and(restrictions, criteriaBuilder.exists(subquery));
    }
    criteriaQuery.where(restrictions);
    criteriaQuery.orderBy(criteriaBuilder.desc(root.get("isTop")));
    return super.findList(criteriaQuery, null, count, filters, orders);
}

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From source file:com.expressui.core.dao.security.query.UserQuery.java

@Override
public List<Predicate> buildCriteria(CriteriaBuilder builder, CriteriaQuery<User> query, Root<User> user) {
    List<Predicate> predicates = new ArrayList<Predicate>();

    if (hasValue(loginName)) {
        ParameterExpression<String> loginNameExp = builder.parameter(String.class, "loginName");
        predicates.add(builder.like(builder.upper(user.<String>get("loginName")), loginNameExp));
    }//from  w ww .  java 2  s . co m

    if (hasValue(doesNotBelongToRole)) {
        Subquery<User> subquery = query.subquery(User.class);
        Root userRole = subquery.from(UserRole.class);
        ParameterExpression<Role> role = builder.parameter(Role.class, "doesNotBelongToRole");
        subquery.select(userRole.get("user")).where(builder.equal(userRole.get("role"), role));
        predicates.add(builder.not(user.in(subquery)));
    }

    return predicates;
}

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From source file:com.expressui.core.dao.security.query.RoleQuery.java

@Override
public List<Predicate> buildCriteria(CriteriaBuilder builder, CriteriaQuery<Role> query, Root<Role> role) {
    List<Predicate> predicates = new ArrayList<Predicate>();

    if (hasValue(name)) {
        ParameterExpression<String> nameExp = builder.parameter(String.class, "name");
        predicates.add(builder.like(builder.upper(role.<String>get("name")), nameExp));
    }/*from  w  ww.j  ava 2s  .  co m*/

    if (hasValue(doesNotBelongToUser)) {
        Subquery<Role> subquery = query.subquery(Role.class);
        Root<UserRole> userRole = subquery.from(UserRole.class);
        ParameterExpression<User> userExp = builder.parameter(User.class, "doesNotBelongToUser");
        subquery.select(userRole.<Role>get("role")).where(builder.equal(userRole.get("user"), userExp));
        predicates.add(builder.not(role.in(subquery)));
    }

    return predicates;
}

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From source file:dao.jpa.TestJpaDao.java

@Test
@Transactional/*from  w ww  . j a v  a  2s . c  om*/
public void testCopy() {
    EntityManager em = bookDao.getEntityManager();
    CriteriaBuilder cb = em.getCriteriaBuilder();
    CriteriaQuery<Book> criteria = cb.createQuery(Book.class);

    // Fetch join
    Root<Book> root = criteria.from(Book.class);
    Path<String> path = root.join("author").<String>get("name");
    root.fetch("author");
    criteria.select(root);

    // SubQuery
    Subquery<String> sq = criteria.subquery(String.class);
    Root<Author> author = sq.from(Author.class);
    sq.select(author.<String>get("name"));
    sq.where(cb.equal(author.<String>get("name"), "Rod"));

    criteria.where(cb.in(path).value(sq));

    CriteriaQuery<Book> copy = cb.createQuery(Book.class);
    JpaUtils.copyCriteria(criteria, copy);

    List<Book> copyBooks = em.createQuery(copy).getResultList();
    List<Book> books = em.createQuery(criteria).getResultList();
    assertEquals(books, copyBooks);
}

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From source file:hr.diskobolos.persistence.impl.EvaluationAnswerPersistenceImpl.java

@Override
public Long fetchNumberOfMemberRegistersWithoutTerms() {
    CriteriaBuilder cb = entityManager.getCriteriaBuilder();
    CriteriaQuery<Long> cq = cb.createQuery(Long.class);
    Root<MemberRegister> memberRegister = cq.from(MemberRegister.class);
    Subquery<Long> sq = cq.subquery(Long.class);
    Root<EvaluationAnswer> evaluationAnswer = sq.from(EvaluationAnswer.class);
    Join<EvaluationAnswer, QuestionChoicesDef> choiceDef = evaluationAnswer.join(EvaluationAnswer_.answer);
    Join<QuestionChoicesDef, EvaluationQuestionDef> questionDef = choiceDef
            .join(QuestionChoicesDef_.evaluationQuestionDef);
    ParameterExpression<QuestionnaireType> questionnaireType = cb.parameter(QuestionnaireType.class,
            "questionnaireType");
    sq.select(evaluationAnswer.get("memberRegister").get("id"))
            .where(cb.equal(questionDef.get(EvaluationQuestionDef_.questionnaireType), questionnaireType));
    cq.select(cb.count(memberRegister.get("id"))).where(cb.not(cb.in(memberRegister.get("id")).value(sq)));
    TypedQuery<Long> query = entityManager.createQuery(cq);
    query.setParameter("questionnaireType", QuestionnaireType.TERMS_OF_CONDITION);
    return query.getSingleResult();
}

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From source file:net.shopxx.dao.impl.ArticleDaoImpl.java

public List<Article> findList(ArticleCategory articleCategory, Tag tag, Boolean isPublication, Integer count,
        List<Filter> filters, List<Order> orders) {
    CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
    CriteriaQuery<Article> criteriaQuery = criteriaBuilder.createQuery(Article.class);
    Root<Article> root = criteriaQuery.from(Article.class);
    criteriaQuery.select(root);//from  w  w  w  . ja  va2  s . c o  m
    Predicate restrictions = criteriaBuilder.conjunction();
    if (articleCategory != null) {
        Subquery<ArticleCategory> subquery = criteriaQuery.subquery(ArticleCategory.class);
        Root<ArticleCategory> subqueryRoot = subquery.from(ArticleCategory.class);
        subquery.select(subqueryRoot);
        subquery.where(criteriaBuilder.or(criteriaBuilder.equal(subqueryRoot, articleCategory),
                criteriaBuilder.like(subqueryRoot.<String>get("treePath"),
                        "%" + ArticleCategory.TREE_PATH_SEPARATOR + articleCategory.getId()
                                + ArticleCategory.TREE_PATH_SEPARATOR + "%")));
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.in(root.get("articleCategory")).value(subquery));
    }
    if (tag != null) {
        restrictions = criteriaBuilder.and(restrictions, criteriaBuilder.equal(root.join("tags"), tag));
    }
    if (isPublication != null) {
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.equal(root.get("isPublication"), isPublication));
    }
    criteriaQuery.where(restrictions);
    if (orders == null || orders.isEmpty()) {
        criteriaQuery.orderBy(criteriaBuilder.desc(root.get("isTop")),
                criteriaBuilder.desc(root.get("createDate")));
    }
    return super.findList(criteriaQuery, null, count, filters, orders);
}

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From source file:net.shopxx.dao.impl.ArticleDaoImpl.java

public Page<Article> findPage(ArticleCategory articleCategory, Tag tag, Boolean isPublication,
        Pageable pageable) {/*from ww  w . j a v  a 2  s  . co m*/
    CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
    CriteriaQuery<Article> criteriaQuery = criteriaBuilder.createQuery(Article.class);
    Root<Article> root = criteriaQuery.from(Article.class);
    criteriaQuery.select(root);
    Predicate restrictions = criteriaBuilder.conjunction();
    if (articleCategory != null) {
        Subquery<ArticleCategory> subquery = criteriaQuery.subquery(ArticleCategory.class);
        Root<ArticleCategory> subqueryRoot = subquery.from(ArticleCategory.class);
        subquery.select(subqueryRoot);
        subquery.where(criteriaBuilder.or(criteriaBuilder.equal(subqueryRoot, articleCategory),
                criteriaBuilder.like(subqueryRoot.<String>get("treePath"),
                        "%" + ArticleCategory.TREE_PATH_SEPARATOR + articleCategory.getId()
                                + ArticleCategory.TREE_PATH_SEPARATOR + "%")));
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.in(root.get("articleCategory")).value(subquery));
    }
    if (tag != null) {
        restrictions = criteriaBuilder.and(restrictions, criteriaBuilder.equal(root.join("tags"), tag));
    }
    if (isPublication != null) {
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.equal(root.get("isPublication"), isPublication));
    }
    criteriaQuery.where(restrictions);
    if (pageable == null
            || ((StringUtils.isEmpty(pageable.getOrderProperty()) || pageable.getOrderDirection() == null)
                    && CollectionUtils.isEmpty(pageable.getOrders()))) {
        criteriaQuery.orderBy(criteriaBuilder.desc(root.get("isTop")),
                criteriaBuilder.desc(root.get("createDate")));
    }
    return super.findPage(criteriaQuery, pageable);
}

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From source file:net.shopxx.dao.impl.ArticleDaoImpl.java

public List<Article> findList(ArticleCategory articleCategory, Boolean isPublication,
        Article.GenerateMethod generateMethod, Date beginDate, Date endDate, Integer first, Integer count) {
    CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
    CriteriaQuery<Article> criteriaQuery = criteriaBuilder.createQuery(Article.class);
    Root<Article> root = criteriaQuery.from(Article.class);
    criteriaQuery.select(root);// www  .  j  av  a  2  s.  com
    Predicate restrictions = criteriaBuilder.conjunction();
    if (articleCategory != null) {
        Subquery<ArticleCategory> subquery = criteriaQuery.subquery(ArticleCategory.class);
        Root<ArticleCategory> subqueryRoot = subquery.from(ArticleCategory.class);
        subquery.select(subqueryRoot);
        subquery.where(criteriaBuilder.or(criteriaBuilder.equal(subqueryRoot, articleCategory),
                criteriaBuilder.like(subqueryRoot.<String>get("treePath"),
                        "%" + ArticleCategory.TREE_PATH_SEPARATOR + articleCategory.getId()
                                + ArticleCategory.TREE_PATH_SEPARATOR + "%")));
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.in(root.get("articleCategory")).value(subquery));
    }
    if (isPublication != null) {
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.equal(root.get("isPublication"), isPublication));
    }
    if (generateMethod != null) {
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.equal(root.get("generateMethod"), generateMethod));
    }
    if (beginDate != null) {
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.greaterThanOrEqualTo(root.<Date>get("createDate"), beginDate));
    }
    if (endDate != null) {
        restrictions = criteriaBuilder.and(restrictions,
                criteriaBuilder.lessThanOrEqualTo(root.<Date>get("createDate"), endDate));
    }
    criteriaQuery.where(restrictions);
    return super.findList(criteriaQuery, first, count, null, null);
}

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From source file:org.osiam.resource_server.storage.dao.ResourceDao.java

public <T extends ResourceEntity> SearchResult<T> search(Class<T> clazz, ParseTree filterTree, int count,
        int startIndex, String sortBy, String sortOrder, FilterParser<T> filterParser) {

    CriteriaBuilder cb = em.getCriteriaBuilder();

    CriteriaQuery<T> resourceQuery = cb.createQuery(clazz);
    Root<T> resourceRoot = resourceQuery.from(clazz);

    Subquery<Long> internalIdQuery = resourceQuery.subquery(Long.class);
    Root<T> internalIdRoot = internalIdQuery.from(clazz);
    internalIdQuery.select(internalIdRoot.get(ResourceEntity_.internalId));

    if (filterTree != null && filterTree.getChildCount() > 0) {
        Predicate predicate = filterParser.createPredicateAndJoin(filterTree, internalIdRoot);
        internalIdQuery.where(predicate);
    }/*from   w w w . j  ava2 s . c  om*/

    resourceQuery.select(resourceRoot)
            .where(cb.in(resourceRoot.get(ResourceEntity_.internalId)).value(internalIdQuery));

    // TODO: evaluate if a User-/GroupDao supplied default sortBy field is possible
    Expression<?> sortByField = resourceRoot.get(ResourceEntity_.id);

    if (sortBy != null && !sortBy.isEmpty()) {
        sortByField = filterParser.createSortByField(sortBy, resourceRoot);
    }

    // default order is ascending
    Order order = cb.asc(sortByField);

    if (sortOrder.equalsIgnoreCase("descending")) {
        order = cb.desc(sortByField);
    }

    resourceQuery.orderBy(order);

    TypedQuery<T> query = em.createQuery(resourceQuery);
    query.setFirstResult(startIndex);
    query.setMaxResults(count);

    List<T> results = query.getResultList();

    long totalResult = getTotalResults(clazz, internalIdQuery);

    return new SearchResult<>(results, totalResult);
}

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