persistence.parent.Dao.java Source code

Introduction

Here is the source code for persistence.parent.Dao.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package persistence.parent;

import entity.Notice;
import entity.parent.PrimEntity;
import java.util.List;
import org.apache.log4j.Logger;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Criterion;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

/**
 * ? ?? ? ?? Dao
 *
 * @author Rice Pavel
 */
public abstract class Dao<T extends PrimEntity> {

    protected Logger log = Logger.getLogger(this.getClass());

    public abstract Class getSupportedClass();

    private SessionFactory sessionFactory;

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

    protected Session currentSession() {
        return sessionFactory.getCurrentSession();
    }

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

    public void deleteObj(final T obj) {
        currentSession().delete(obj);
    }

    public Long save(T obj) {
        if (obj.getId() == null) {
            return (Long) currentSession().save(obj);
        } else {
            throw new Error("error: object can not be saved with id");
        }
    }

    public void refresh(T obj) {
        currentSession().refresh(obj);
    }

    public void saveOrUpdate(T obj) {
        currentSession().saveOrUpdate(obj);
    }

    public void update(T obj) {
        //currentSession().update(obj);
        currentSession().merge(obj);
    }

    public void updateTrue(T obj) {
        currentSession().evict(obj);
        currentSession().update(obj);
    }

    /**
     *  ?
     *
     * @param noticeType  ?.   null
     * @return
     */
    @Transactional
    public List<T> getAll() {
        Criteria cr = currentSession().createCriteria(getSupportedClass());
        cr.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
        return cr.list();
    }

    public void delete(T obj) {
        currentSession().delete(obj);
    }

    public T getOne(String id) {
        return (T) currentSession().get(getSupportedClass(), Long.valueOf(id));
    }

    public T find(Long id) {
        if (id != null) {
            return (T) currentSession().get(getSupportedClass(), id);
        } else {
            return null;
        }
    }

    protected Criteria getCriteriaDistinctRootEntity(Class cl) {
        Criteria crit = currentSession().createCriteria(cl);
        crit.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
        return crit;
    }

    protected Criterion nullOrFalse(String fieldName) {
        return Restrictions.or(Restrictions.isNull(fieldName), Restrictions.eq(fieldName, false));
    }

}