levelserviceimpl.java.svn-base

菲律宾的一个大学的图书管理系统 spring+hibernate+velocity

/*
 * 创建日期 2005-5-16
 */
package biz.bluesky.pts.service.impl;

import java.util.List;

import biz.bluesky.pts.model.TLevel;
import biz.bluesky.pts.service.ILevelService;
import biz.bluesky.pts.service.dao.ILevelDAO;

import biz.bluesky.pts.util.ErrorCode;

import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.orm.ObjectRetrievalFailureException;
import org.springframework.dao.DataAccessException;


public class LevelServiceImpl implements ILevelService {

    private ILevelDAO levelDAO;
    
    public ILevelDAO getLevelDAO() {
        return this.levelDAO;
    }

    public void setLevelDAO(ILevelDAO levelDAO) {
        this.levelDAO = levelDAO;
    }
 
    //根据级别编号查询级别
    public TLevel findLevel(int levelId) {
        return levelDAO.findLevel(levelId);
    }

    //根据级别名称查询级别
    public TLevel findLevel(String level) {
        return levelDAO.findLevel(level);
    }

    //查询所有的级别
    public List findLevels() {
        return levelDAO.findLevels();
    }

    //新增级别
    public int saveLevel(TLevel level) {
        if((level == null)||(level.getLevel().equals(""))) {
            return ErrorCode.ERR_LEVEL_EMPTY;
        }
        
        try {
            levelDAO.saveLevel(level);
        }
        catch(ObjectRetrievalFailureException excp) {
            return ErrorCode.ERR_LEVEL_REPEAT;
        }
        catch(DataAccessException excp) {
            return ErrorCode.ERR_UNKNOW;
        }
        
        return ErrorCode.ERR_UNDISCOVERED;
    }

    //删除级别
    public int removeLevel(int levelId) {
        try {
            levelDAO.removeLevel(levelId);
        }
        catch(ObjectRetrievalFailureException excp) {
            return ErrorCode.ERR_LEVEL_NOT_FIND;
        }
        catch(DataAccessException excp) {
            return ErrorCode.ERR_UNKNOW;
        }
        
        return ErrorCode.ERR_UNDISCOVERED;
    }

    
}