teacherservice.java

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/**
 * 
 */
package edu.yinhe.mis.services;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import edu.yinhe.mis.dto.DictionaryDTO;
import edu.yinhe.mis.dto.TeacherDTO;
import edu.yinhe.mis.model.DAOFactory;
import edu.yinhe.system.common.AppException;
import edu.yinhe.system.model.IBaseDAO;
import edu.yinhe.system.services.Service;

/**
 * @author 朱进喜
 *Creation date:05-02-2008
 * @version	jdk1.6.0_03
 * @since 从jdk1.0版本开始
 */
public class TeacherService extends Service {

	private IBaseDAO tdao = null;

	/* *验证老师编号的唯一性
	 * @see edu.yinhe.system.services.Service#load(java.lang.Object)
	 */
	public Object load(Object obj) throws AppException {
		Boolean flag = new Boolean(false);
		try {
			tdao = DAOFactory.getTeacherDAO(conn);
			flag = (Boolean) tdao.find(obj);
		} catch (SQLException e) {
			try {
				this.conn.rollback();
			} catch (SQLException e1) {
				throw new AppException(e1.getMessage()+"回滚失败");
			}
			e.printStackTrace();
		}finally{
			this.closeConnection();
			tdao = null;
		}
		return flag;
	}

	/**
	 * 新增老师信息
	 */
	public Object create(Object obj) throws AppException {
		
		Boolean flag = new Boolean(false);
		try {
			tdao = DAOFactory.getTeacherDAO(conn);
			flag = (Boolean) tdao.insert(obj);
		} catch (SQLException e) {
			try {
				this.conn.rollback();
			} catch (SQLException e1) {
				throw new AppException(e1.getMessage()+"回滚失败");
			}
			e.printStackTrace();
		}finally{
			this.closeConnection();
			tdao = null;
		}
		return flag;
	}

	/**
	 * 查看老师详细信息
	 */
	public Object findAll(Object obj) throws AppException {
		
		Object[] object = null;
		try {
			tdao = DAOFactory.getTeacherDAO(conn);
			object = (Object[]) tdao.findAll(obj);
		} catch (SQLException e) {
			try {
				conn.rollback();
			} catch (SQLException e1) {
				throw new AppException(e1.getMessage()+"回滚失败");
			}
			e.printStackTrace();
		}finally{
			this.closeConnection();
			tdao = null;
		}
		return object;
	}

	/**
	 * 通过指定的id查询老师信息
	 */
	public Object findById(Object obj) throws AppException {
		
		List list = null;
		try {
			tdao = DAOFactory.getTeacherDAO(conn);
			list = (ArrayList)tdao.findById(obj);
		} catch (SQLException e) {
			try {
				conn.rollback();
			} catch (SQLException e1) {
				throw new AppException(e1.getMessage()+"回滚失败");
			}
			e.printStackTrace();
		}finally{
			this.closeConnection();
			tdao = null;
		}
		return list;
	}

	/**
	 * 获得数据字典
	 */
	public Object findByObject(Object obj) throws AppException {

		Map dmap = null;
		tdao = DAOFactory.getTeacherDAO(conn);
		try {
			dmap = (HashMap)tdao.findByObject(obj);
		} catch (SQLException e) {
			try {
				conn.rollback();
			} catch (SQLException e1) {
				throw new AppException(e1.getMessage()+"回滚失败");
			}
			e.printStackTrace();
		}finally{
			this.closeConnection();
			tdao = null;
		}
		return dmap;
	}

	/**
	 * 更新老师信息
	 */
	public Object modify(Object obj) throws AppException {
		
		Boolean flag = new Boolean(false);
		try {
			tdao = DAOFactory.getTeacherDAO(conn);
			flag = (Boolean) tdao.update(obj);
		} catch (SQLException e) {
			try {
				conn.rollback();
			} catch (SQLException e1) {
				throw new AppException(e1.getMessage()+"回滚失败");
			}
			e.printStackTrace();
		}finally{
			this.closeConnection();
			tdao = null;
		}
		return flag;
	}

	/**
	 * 删除老师信息
	 */
	public Object remove(Object obj) throws AppException {
		
		Boolean flag = new Boolean(false);
		TeacherDTO tdto = (TeacherDTO)obj;
		if(tdto.getDelType().equals("delAll")){
			flag = (Boolean) this.removeAll(obj);
		}else{
			flag = (Boolean) this.removeOne(obj);
		}
		return flag;
	}
	/**
	 * 批量删除老师信息
	 * @param obj
	 * @return
	 * @throws AppException
	 */
	private Object removeAll(Object obj) throws AppException {
		
		Boolean flag = new Boolean(false);
		TeacherDTO tdto = null;
		String[] idStr = null;
		try {
			tdto = (TeacherDTO) obj;
			idStr = tdto.getIdStr().split("_");
			tdao = DAOFactory.getTeacherDAO(conn);
			for(int i=1; i<idStr.length; i++){
				tdto.setId(Integer.parseInt(idStr[i]));
				flag = (Boolean) tdao.delete(tdto);
			}
		} catch (SQLException e) {
			try {
				conn.rollback();
			} catch (SQLException e1) {
				throw new AppException(e1.getMessage()+"回滚失败");
			}
			e.printStackTrace();
		}finally{
			this.closeConnection();
			tdao = null;
		}
		return flag;
	}
	/**
	 * 通过指定的id删除老师信息
	 * @param obj
	 * @return
	 * @throws AppException
	 */
	private Object removeOne(Object obj) throws AppException {
		
		Boolean flag = new Boolean(false);
		try {
			tdao = DAOFactory.getTeacherDAO(conn);
			flag = (Boolean) tdao.delete(obj);
		} catch (SQLException e) {
			try {
				conn.rollback();
			} catch (SQLException e1) {
				throw new AppException(e1.getMessage()+"回滚失败");
			}
			e.printStackTrace();
		}finally{
			this.closeConnection();
			tdao = null;
		}
		return flag;
	}
	
}