package com;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.cfg.Configuration;

import javax.naming.InitialContext;

/**
 * 说明:hibernate初始化类，如果是运行期，将从上下文中取得sessionFactory
 *
 * 2004-8-4
 */
public class HibernateInit {
  private static HibernateInit instance= null;
  private static SessionFactory sessionFactory;
  //运行类型是服务器运行还是单元测试，如果是单元测试，设置其参数值为junit
  private static String runType= "web";

  public static void setRunType(String type) {
    runType= type;
  }
  public synchronized static HibernateInit getInstance() {
    if (instance == null) {
      instance= new HibernateInit();
    }
    return instance;
  }

  private HibernateInit() {
    initSessionFactory();
  }

  private void initSessionFactory() {
    Configuration conf;
    try {
      if (runType != null && runType.equalsIgnoreCase("junit")) {
        java.net.URL configFileURL= GenerateDataBaseUtil.class.getResource("/hibernate_GenerateDB.cfg.xml");
        conf= (new Configuration()).configure(configFileURL);
        sessionFactory= conf.buildSessionFactory();
      } else {
        InitialContext ctx= new InitialContext();
        sessionFactory= (SessionFactory) ctx.lookup("hibernate/session_factory");
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public SessionFactory getSessionFactory() {
    return sessionFactory;
  }
}