Java tutorial
/** * Copyright (c) 2005-2009 springside.org.cn * * Licensed under the Apache License, Version 2.0 (the "License"); * * $Id: HibernateDao.java 577 2009-10-20 15:44:24Z calvinxiu $ */ package jp.ac.tokushima_u.is.ll.common.orm.hibernate; import java.io.Serializable; import java.util.ArrayList; import java.util.List; import java.util.Map; import jp.ac.tokushima_u.is.ll.common.orm.Page; import jp.ac.tokushima_u.is.ll.common.orm.PropertyFilter; import jp.ac.tokushima_u.is.ll.common.orm.PropertyFilter.MatchType; import jp.ac.tokushima_u.is.ll.util.ReflectionUtils; import org.apache.commons.lang.StringUtils; import org.hibernate.Criteria; import org.hibernate.Query; import org.hibernate.SessionFactory; import org.hibernate.criterion.CriteriaSpecification; import org.hibernate.criterion.Criterion; import org.hibernate.criterion.DetachedCriteria; import org.hibernate.criterion.Disjunction; import org.hibernate.criterion.MatchMode; import org.hibernate.criterion.Order; import org.hibernate.criterion.Projection; import org.hibernate.criterion.Projections; import org.hibernate.criterion.Restrictions; import org.hibernate.internal.CriteriaImpl; import org.hibernate.transform.ResultTransformer; import org.springframework.util.Assert; /** * SpringSide??Hibernate DAO * ????????? * Service????DAO?? * * @param <T> DAO?? * @param <PK> ? * * @author calvin */ @SuppressWarnings("rawtypes") public class HibernateDao<T, PK extends Serializable> extends SimpleHibernateDao<T, PK> { /** * DAO?? * ?????? * * eg. * public class UserDao extends HibernateDao<User, Long>{ * } */ public HibernateDao() { super(); } /** * Dao????Service????? * * eg. * HibernateDao<User, Long> userDao = new HibernateDao<User, Long>(sessionFactory, User.class); */ public HibernateDao(final SessionFactory sessionFactory, final Class<T> entityClass) { super(sessionFactory, entityClass); } //-- --// /** * ?????? */ public Page<T> getAll(final Page<T> page) { return findPage(page); } /** * HQL? * * @param page ?.??orderBy?. ?orderBy???? * @param hql Hibernate HQL * @param values HQL????? * * @return , ??. */ @SuppressWarnings("unchecked") public Page<T> findPage(final Page<T> page, final String hql, final Object... values) { Assert.notNull(page, "page should not be null"); Query q = createQuery(hql, values); if (page.isAutoCount()) { long totalCount = countHqlResult(hql, values); page.setTotalCount(totalCount); } setPageParameter(q, page); List result = q.list(); page.setResult(result); return page; } /** * HQL? * * @param page * @param hql HQL * @param values HQL???????? * * @return ?.????? */ @SuppressWarnings("unchecked") public Page<T> findPage(final Page<T> page, final String hql, final Map<String, Object> values) { Assert.notNull(page, "page should not be null"); Query q = createQuery(hql, values); if (page.isAutoCount()) { long totalCount = countHqlResult(hql, values); page.setTotalCount(totalCount); } setPageParameter(q, page); List result = q.list(); page.setResult(result); return page; } /** * Criteria?. * * @param page . * @param criterions ?Criterion. * * @return ?.????? */ @SuppressWarnings("unchecked") public Page<T> findPage(final Page<T> page, final Criterion... criterions) { Assert.notNull(page, "page should not be null"); Criteria c = createCriteria(criterions); if (page.isAutoCount()) { long totalCount = countCriteriaResult(c); page.setTotalCount(totalCount); } setPageParameter(c, page); List result = c.list(); page.setResult(result); return page; } @SuppressWarnings("unchecked") public Page<T> findPage(final Page<T> page, final DetachedCriteria detachedCriteria) { Assert.notNull(page, "page should not be null"); Criteria c = detachedCriteria.getExecutableCriteria(getSession()); if (page.isAutoCount()) { long totalCount = countCriteriaResult(c); page.setTotalCount(totalCount); } setPageParameter(c, page); List result = c.list(); page.setResult(result); return page; } /** * Query??? */ protected Query setPageParameter(final Query q, final Page<T> page) { //??Hibernate?firstResult???0??? q.setFirstResult(page.getFirst() - 1); q.setMaxResults(page.getPageSize()); return q; } /** * Criteria??? */ protected Criteria setPageParameter(final Criteria c, final Page<T> page) { //??Hibernate?firstResult???0??? c.setFirstResult(page.getFirst() - 1); c.setMaxResults(page.getPageSize()); if (page.isOrderBySetted()) { String[] orderByArray = StringUtils.split(page.getOrderBy(), ','); String[] orderArray = StringUtils.split(page.getOrder(), ','); Assert.isTrue(orderByArray.length == orderArray.length, "???,????"); for (int i = 0; i < orderByArray.length; i++) { if (Page.ASC.equals(orderArray[i])) { c.addOrder(Order.asc(orderByArray[i])); } else { c.addOrder(Order.desc(orderByArray[i])); } } } return c; } /** * count???HQL??????? * *?????HQL????????HQL??count??????? */ protected long countHqlResult(final String hql, final Object... values) { String fromHql = hql; //select?order by?count????,??? fromHql = "from " + StringUtils.substringAfter(fromHql, "from"); fromHql = StringUtils.substringBefore(fromHql, "order by"); String countHql = "select count(*) " + fromHql; try { Long count = findUnique(countHql, values); return count; } catch (Exception e) { throw new RuntimeException("hql can't be auto count, hql is:" + countHql, e); } } /** * count???HQL??????? * * ?????HQL????????HQL??count??????? */ protected long countHqlResult(final String hql, final Map<String, Object> values) { String fromHql = hql; //select?order by?count????,??? fromHql = "from " + StringUtils.substringAfter(fromHql, "from"); fromHql = StringUtils.substringBefore(fromHql, "order by"); String countHql = "select count(*) " + fromHql; try { Long count = findUnique(countHql, values); return count; } catch (Exception e) { throw new RuntimeException("hql can't be auto count, hql is:" + countHql, e); } } /** * count???Criteria??????? */ @SuppressWarnings("unchecked") protected long countCriteriaResult(final Criteria c) { CriteriaImpl impl = (CriteriaImpl) c; // ??Projection?ResultTransformer?OrderBy????NULL???Count? Projection projection = impl.getProjection(); ResultTransformer transformer = impl.getResultTransformer(); List<CriteriaImpl.OrderEntry> orderEntries = null; try { orderEntries = (List) ReflectionUtils.getFieldValue(impl, "orderEntries"); ReflectionUtils.setFieldValue(impl, "orderEntries", new ArrayList()); } catch (Exception e) { logger.error("Exception:{}", e.getMessage()); } // Count? long totalCount = (Long) c.setProjection(Projections.rowCount()).uniqueResult(); // ?????Projection?ResultTransformer?OrderBy???? c.setProjection(projection); if (projection == null) { c.setResultTransformer(CriteriaSpecification.ROOT_ENTITY); } if (transformer != null) { c.setResultTransformer(transformer); } try { ReflectionUtils.setFieldValue(impl, "orderEntries", orderEntries); } catch (Exception e) { logger.error("Exception:{}", e.getMessage()); } return totalCount; } //-- ??(PropertyFilter)? --// /** * ??. * * @param matchType ?,?????PropertyFilter?MatcheType enum????????. */ public List<T> findBy(final String propertyName, final Object value, final MatchType matchType) { Criterion criterion = buildPropertyFilterCriterion(propertyName, value, matchType); return find(criterion); } /** * ??? */ public List<T> find(List<PropertyFilter> filters) { Criterion[] criterions = buildPropertyFilterCriterions(filters); return find(criterions); } /** * ??? */ public Page<T> findPage(final Page<T> page, final List<PropertyFilter> filters) { Criterion[] criterions = buildPropertyFilterCriterions(filters); return findPage(page, criterions); } /** * ??Criterion[]??. */ protected Criterion[] buildPropertyFilterCriterions(final List<PropertyFilter> filters) { List<Criterion> criterionList = new ArrayList<Criterion>(); for (PropertyFilter filter : filters) { if (!filter.isMultiProperty()) { //?????????. Criterion criterion = buildPropertyFilterCriterion(filter.getPropertyName(), filter.getPropertyValue(), filter.getMatchType()); criterionList.add(criterion); } else {//?????????or??. Disjunction disjunction = Restrictions.disjunction(); for (String param : filter.getPropertyNames()) { Criterion criterion = buildPropertyFilterCriterion(param, filter.getPropertyValue(), filter.getMatchType()); disjunction.add(criterion); } criterionList.add(disjunction); } } return criterionList.toArray(new Criterion[criterionList.size()]); } /** * ??Criterion?,. */ protected Criterion buildPropertyFilterCriterion(final String propertyName, final Object propertyValue, final MatchType matchType) { Assert.hasText(propertyName, "propertyName should not be null"); Criterion criterion = null; try { //MatchType?criterion? if (MatchType.EQ.equals(matchType)) { criterion = Restrictions.eq(propertyName, propertyValue); } else if (MatchType.LIKE.equals(matchType)) { criterion = Restrictions.like(propertyName, (String) propertyValue, MatchMode.ANYWHERE); } else if (MatchType.LE.equals(matchType)) { criterion = Restrictions.le(propertyName, propertyValue); } else if (MatchType.LT.equals(matchType)) { criterion = Restrictions.lt(propertyName, propertyValue); } else if (MatchType.GE.equals(matchType)) { criterion = Restrictions.ge(propertyName, propertyValue); } else if (MatchType.GT.equals(matchType)) { criterion = Restrictions.gt(propertyName, propertyValue); } } catch (Exception e) { throw ReflectionUtils.convertReflectionExceptionToUnchecked(e); } return criterion; } /** * ???Unique?????. * *????????(value)??(orgValue)????????? */ public boolean isPropertyUnique(final String propertyName, final Object newValue, final Object oldValue) { if (newValue == null || newValue.equals(oldValue)) { return true; } Object object = findUniqueBy(propertyName, newValue); return (object == null); } }