Example usage for javax.persistence.criteria Root as

Introduction

In this page you can find the example usage for javax.persistence.criteria Root as.

Prototype

<X> Expression<X> as(Class<X> type);

Source Link

Document

Perform a typecast upon the expression, returning a new expression object.

Usage

From source file:org.jdal.dao.jpa.JpaUtils.java

/**
 * Find the Root with type class on CriteriaQuery Root Set
 * @param <T> root type/* w ww . j  av  a 2  s  .  c  o m*/
 * @param query criteria query
 * @param clazz root type
 * @return Root<T> of null if none
 */
@SuppressWarnings("unchecked")
public static <T> Root<T> findRoot(CriteriaQuery<?> query, Class<T> clazz) {

    for (Root<?> r : query.getRoots()) {
        if (clazz.equals(r.getJavaType())) {
            return (Root<T>) r.as(clazz);
        }
    }
    return (Root<T>) query.getRoots().iterator().next();
}

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From source file:com.zero.dao.impl.BaseDaoImpl.java

private Root<T> getRoot(CriteriaQuery<?> criteriaQuery, Class<T> clazz) {
    if (criteriaQuery != null && criteriaQuery.getRoots() != null && clazz != null) {
        for (Root<?> root : criteriaQuery.getRoots()) {
            if (clazz.equals(root.getJavaType())) {
                return (Root<T>) root.as(clazz);
            }//  w w w .java2  s  . c  om
        }
    }
    return null;
}

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From source file:com.order.erp.web.controller.SystemController.java

@RequestMapping(path = "staff", method = RequestMethod.GET)
public String staffIndex(HttpServletRequest request,
        @RequestParam(name = "keyword", required = false) String keyword,
        @PageableDefault(page = 0, size = 10, sort = "id", direction = Direction.ASC) Pageable pageable,
        ModelMap model) {/*w w  w . ja v a 2 s  . c  o  m*/
    Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
    User me = staffService.findByAccountUsername(((UserDetails) principal).getUsername());
    Company company = me.getCompany();
    //List<User> userList = userService.findUsersByAmoebaId(company.getId());

    final User meStaff = me;
    final String finalKeyword = keyword;
    final Company finalCompany = company;
    Page<User> page = staffService.findUsers(new Specification<User>() {
        public Predicate toPredicate(Root<User> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
            query.distinct(true);
            Predicate p1 = cb.equal(root.get("company").as(Company.class), finalCompany);
            Predicate p2 = cb.conjunction();
            if (StringUtils.isNotBlank(finalKeyword)) {
                Predicate p1_like = cb.like(root.get("account").get("username").as(String.class),
                        "%" + finalKeyword + "%");
                Predicate p2_like = cb.like(root.get("realname").as(String.class), "%" + finalKeyword + "%");
                p2 = cb.or(p1_like, p2_like);
            }
            Predicate p3 = cb.notEqual(root.as(User.class), meStaff);
            Predicate p_result = cb.and(p1, p2, p3);
            return p_result;
        }
    }, pageable);

    model.put("user", me);
    model.put("company", company);
    model.put("page", page);
    return "/system/staff_list";
}

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From source file:org.agric.oxm.utils.JpaUtils.java

/**
 * Find the Root with type class on CriteriaQuery Root Set
 * /*from  w  w w.j a  va  2 s.  c  o m*/
 * @param <T>
 *            root type
 * @param query
 *            criteria query
 * @param clazz
 *            root type
 * @return Root<T> of null if none
 */
public static <T> Root<T> findRoot(CriteriaQuery<?> query, Class<T> clazz) {

    for (Root<?> r : query.getRoots()) {
        if (clazz.equals(r.getJavaType())) {
            return (Root<T>) r.as(clazz);
        }
    }
    return null;
}

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