com.gotour.daos.GenericDaoImpl.java Source code

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Here is the source code for com.gotour.daos.GenericDaoImpl.java

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package com.gotour.daos;

import java.lang.reflect.ParameterizedType;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;

public abstract class GenericDaoImpl<T> implements GenericDao<T> {

    private Class<T> type;

    @Autowired
    private SessionFactory sessionFactory;

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

    protected SessionFactory getSessionFactory() {
        return sessionFactory;
    }

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

    public Class<T> getType() {
        return type;
    }

    public GenericDaoImpl() {
        this.type = (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
    }

    @Override
    public T find(Long id) {
        return (T) getSessionFactory().getCurrentSession().get(getType(), id);
    }

    @Override
    public void delete(T obj) {
        getSessionFactory().getCurrentSession().delete(obj);
    }

    @Override
    public void save(T obj) {
        getSessionFactory().getCurrentSession().save(obj);
    }

    @Override
    public void update(T obj) {
        getSessionFactory().getCurrentSession().update(obj);
    }

    @Override
    public List<T> getAll() {
        Session session = sessionFactory.getCurrentSession();
        Criteria crit = session.createCriteria(type);
        crit.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
        return crit.list();
    }

    @Override
    public List<T> getPage(int pageNumber, int pageSize) {
        Criteria crit = getSession().createCriteria(type);
        crit.setFirstResult((pageNumber - 1) * pageSize);
        crit.setMaxResults(pageSize);
        return crit.list();
    }

    @Override
    public List<T> find(String property, Object value) {
        Criteria crit = getSession().createCriteria(type);
        crit.add(Restrictions.eq(property, value));
        return crit.list();
    }

    @Override
    public T findUnique(String property, Object value) {
        Criteria crit = getSession().createCriteria(type);
        crit.add(Restrictions.eq(property, value));
        crit.setMaxResults(1);
        return (T) crit.uniqueResult();
    }

    protected List<T> getPageByCriteria(int pageNumber, int pageSize, Criteria crit) {
        crit.setFirstResult((pageNumber - 1) * pageSize);
        crit.setMaxResults(pageSize);
        return crit.list();
    }
}