net.groupbuy.dao.impl.CouponDaoImpl.java Source code

Introduction

Here is the source code for net.groupbuy.dao.impl.CouponDaoImpl.java

Source

/*
 * Copyright 2005-2013 shopxx.net. All rights reserved.
 * Support: http://www.shopxx.net
 * License: http://www.shopxx.net/license
 */
package net.groupbuy.dao.impl;

import java.util.Date;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;

import net.groupbuy.Page;
import net.groupbuy.Pageable;
import net.groupbuy.dao.CouponDao;
import net.groupbuy.entity.Coupon;

import org.springframework.stereotype.Repository;

/**
 * Dao - 
 * 
 * @author SHOP++ Team
 * @version 3.0
 */
@Repository("couponDaoImpl")
public class CouponDaoImpl extends BaseDaoImpl<Coupon, Long> implements CouponDao {

    public Page<Coupon> findPage(Boolean isEnabled, Boolean isExchange, Boolean hasExpired, Pageable pageable) {
        CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
        CriteriaQuery<Coupon> criteriaQuery = criteriaBuilder.createQuery(Coupon.class);
        Root<Coupon> root = criteriaQuery.from(Coupon.class);
        criteriaQuery.select(root);
        Predicate restrictions = criteriaBuilder.conjunction();
        if (isEnabled != null) {
            restrictions = criteriaBuilder.and(restrictions,
                    criteriaBuilder.equal(root.get("isEnabled"), isEnabled));
        }
        if (isExchange != null) {
            restrictions = criteriaBuilder.and(restrictions,
                    criteriaBuilder.equal(root.get("isExchange"), isExchange));
        }
        if (hasExpired != null) {
            if (hasExpired) {
                restrictions = criteriaBuilder.and(restrictions, root.get("endDate").isNotNull(),
                        criteriaBuilder.lessThan(root.<Date>get("endDate"), new Date()));
            } else {
                restrictions = criteriaBuilder.and(restrictions, criteriaBuilder.or(root.get("endDate").isNull(),
                        criteriaBuilder.greaterThanOrEqualTo(root.<Date>get("endDate"), new Date())));
            }
        }
        criteriaQuery.where(restrictions);
        return super.findPage(criteriaQuery, pageable);
    }

}