com.cmweb.orm.hibernate.SimpleHibernateDao.java Source code

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Here is the source code for com.cmweb.orm.hibernate.SimpleHibernateDao.java

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/**
 * Copyright (c) 2005-2009 springside.org.cn
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 
 * $Id: SimpleHibernateDao.java 582 2009-10-22 14:26:23Z calvinxiu $
 */
package com.cmweb.orm.hibernate;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.hibernate.Criteria;
import org.hibernate.Hibernate;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.CriteriaSpecification;
import org.hibernate.criterion.Criterion;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Restrictions;
import org.hibernate.metadata.ClassMetadata;
import org.springframework.beans.factory.annotation.Autowired;

import com.cmweb.utils.ReflectionUtils;

@SuppressWarnings("unchecked")
public class SimpleHibernateDao<T, PK extends Serializable> {

    protected SessionFactory sessionFactory;

    protected Class<T> entityClass;

    public SimpleHibernateDao() {
        this.entityClass = ReflectionUtils.getSuperClassGenricType(getClass());
    }

    public SimpleHibernateDao(final SessionFactory sessionFactory, final Class<T> entityClass) {
        this.sessionFactory = sessionFactory;
        this.entityClass = entityClass;
    }

    public SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    @Autowired
    public void setSessionFactory(final SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    public Session getSession() {
        return sessionFactory.getCurrentSession();
    }

    public void save(final T entity) throws Exception {
        getSession().saveOrUpdate(entity);
    }

    public void saveAll(final List<T> list) throws Exception {
        for (T entity : list) {
            this.save(entity);
        }
    }

    public void delete(final T entity) {
        getSession().delete(entity);
    }

    public void delete(final PK id) {
        delete(get(id));
    }

    public T get(final PK id) {
        return (T) getSession().get(entityClass, id);
    }

    public List<T> getAll() {
        return find();
    }

    public List<T> getAll(String orderBy, boolean isAsc) {
        Criteria c = createCriteria();
        if (isAsc) {
            c.addOrder(Order.asc(orderBy));
        } else {
            c.addOrder(Order.desc(orderBy));
        }
        return c.list();
    }

    public List<T> findBy(final String propertyName, final Object value) {
        Criterion criterion = Restrictions.eq(propertyName, value);
        return find(criterion);
    }

    public T findUniqueBy(final String propertyName, final Object value) {
        Criterion criterion = Restrictions.eq(propertyName, value);
        return (T) createCriteria(criterion).uniqueResult();
    }

    public List<T> findByIds(List<PK> ids) {
        return find(Restrictions.in(getIdName(), ids));
    }

    public <X> List<X> find(final String hql, final Object... values) {
        return createQuery(hql, values).list();
    }

    public <X> List<X> find(final String hql, final Map<String, Object> values) {
        return createQuery(hql, values).list();
    }

    public <X> X findUnique(final String hql, final Object... values) {
        return (X) createQuery(hql, values).uniqueResult();
    }

    public <X> X findUnique(final String hql, final Map<String, Object> values) {
        return (X) createQuery(hql, values).uniqueResult();
    }

    public int batchExecute(final String hql, final Object... values) {
        return createQuery(hql, values).executeUpdate();
    }

    public int batchExecute(final String hql, final Map<String, Object> values) {
        return createQuery(hql, values).executeUpdate();
    }

    public Query createQuery(final String queryString, final Object... values) {
        Query query = getSession().createQuery(queryString);
        if (values != null) {
            for (int i = 0; i < values.length; i++) {
                query.setParameter(i, values[i]);
            }
        }
        return query;
    }

    public Query createQuery(final String queryString, final Map<String, Object> values) {
        Query query = getSession().createQuery(queryString);
        if (values != null) {
            query.setProperties(values);
        }
        return query;
    }

    public List<T> find(final Criterion... criterions) {
        return createCriteria(criterions).list();
    }

    public T findUnique(final Criterion... criterions) {
        return (T) createCriteria(criterions).uniqueResult();
    }

    public Criteria createCriteria(final Criterion... criterions) {
        Criteria criteria = getSession().createCriteria(entityClass);
        for (Criterion c : criterions) {
            criteria.add(c);
        }
        return criteria;
    }

    public void initEntity(T entity) {
        Hibernate.initialize(entity);
    }

    /**
     * @see #initEntity(Object)
     */
    public void initEntity(List<T> entityList) {
        for (T entity : entityList) {
            Hibernate.initialize(entity);
        }
    }

    public Query distinct(Query query) {
        query.setResultTransformer(CriteriaSpecification.DISTINCT_ROOT_ENTITY);
        return query;
    }

    public Criteria distinct(Criteria criteria) {
        criteria.setResultTransformer(CriteriaSpecification.DISTINCT_ROOT_ENTITY);
        return criteria;
    }

    @SuppressWarnings("rawtypes")
    public <X> List<X> distinct(List list) {
        Set<X> set = new LinkedHashSet<X>(list);
        return new ArrayList<X>(set);
    }

    public String getIdName() {
        ClassMetadata meta = getSessionFactory().getClassMetadata(entityClass);
        return meta.getIdentifierPropertyName();
    }

}