package com.chance.dao;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import com.lidroid.xutils.DbUtils;
import com.lidroid.xutils.exception.DbException;
/**
*
* @author Chance
*
* 创建时间 下午2:48:18
*
* DAO层基类
*/
public abstract class BaseDao<T> {
public static DbUtils db;
private Class<T> clazz;
/**
* 创建得到DbUtil的管家
*
* @param context
*/
@SuppressWarnings("unchecked")
public BaseDao(Context context, String Dbname) {
db = DaoManager.getInstence(context, Dbname);
Type genType = this.getClass().getGenericSuperclass();
Type[] params = ((ParameterizedType) genType).getActualTypeArguments();
this.clazz = (Class<T>) params[0];
try {
createTable();
} catch (DbException e) {
e.printStackTrace();
}
}
/**
* 返回DbUtil管家
*
* @return
*/
public DbUtils getInstence() {
return db;
}
/**
* 创建表
*
* @throws DbException
*/
private void createTable() throws DbException {
db.createTableIfNotExist(clazz);
}
/**
* 保存一组数据
*
* @param list
* @throws DbException
*/
public void save(List<T> list) throws DbException {
if (list != null) {
for (T t : list) {
db.save(t);
}
}
}
/**
* 用来保存单个数据
*
* @param object
* @throws DbException
*/
public void save(T t) throws DbException {
if (t != null) {
db.save(t);
}
}
/**
* 查找并返回
*
* @return
* @throws DbException
*/
public List<T> findData() throws DbException {
List<T> list = new ArrayList<T>();
if (db != null) {
list = (List<T>) db.findAll(clazz);
}
return list;
}
/**
* 根据某一个String 的条件查找
*
* @param term
* @return
* @throws DbException
*/
public abstract T findData(String term) throws DbException;
/**
* 根据一个id 来查找
*
* @param id
* @return
* @throws DbException
*/
public T findData(int id) throws DbException {
T entity = (T) db.findById(clazz, id);
return entity;
}
/**
* 根据一个String查找并且修改语句
*
* @param term
* @return
*/
public abstract void updateData(String term);
/**
* 根据一个T泛型进行查找并且修改语句
*
* @param t
* @return
*/
public abstract void updateData(T t);
/**
* 根据id进行删除
*
* @param id
* @throws DbException
*/
public void deletData(int id) throws DbException {
db.deleteById(clazz, id);
}
/**
* 根据一些特定的值来 删除
*
* @param t
* @throws DbException
*/
public abstract void deletData(T t) throws DbException;
}
