/**
 * 
 */
package com.permission.dao.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.permission.dao.IRoleDAO;
import com.permission.sys.BaseDAO;
import com.permission.sys.PageRoll;
import com.permission.utils.common.PermissionException;
import com.permission.utils.db.DBUtil;
import com.permission.vo.Role;

/**
 * @author Jack
 * 
 */
public class RoleDAOImpl extends BaseDAO implements IRoleDAO {

	@Override
	public void add(Role role) throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		String sql = "insert into role(RoleName,Description) values (?,?)";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			ps.setString(1, role.getRoleName());
			ps.setString(2, role.getDescription());
			ps.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("添加角色失败");
		} finally {
			DBUtil.close(null, ps, conn);
		}
	}

	@Override
	public void delete(Integer roleID) throws PermissionException {
		String sql = "delete from role where RoleID=" + roleID;
		try {
			executeUpdate(sql);
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("删除角色失败");
		}
	}

	@Override
	public Role findByRoleID(Integer roleID) throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		Role role = null;
		String sql = "select RoleID,RoleName,Description from role where RoleID=?";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			ps.setInt(1, roleID);
			rs = ps.executeQuery();
			if (rs.next()) {
				role = new Role();
				role.setRoleID(rs.getInt(1));
				role.setRoleName(rs.getString(2));
				role.setDescription(rs.getString(3));
			}
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("根据角色ID查询角色信息失败");
		} finally {
			DBUtil.close(rs, ps, conn);
		}
		return role;
	}

	@Override
	public List<Role> list(PageRoll pageRoll) throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		List<Role> list = new ArrayList<Role>();
		String sql = "select RoleID,RoleName,Description from role limit ?,?";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			ps.setInt(1, (pageRoll.getCurrPage() - 1) * pageRoll.getPageSize());
			ps.setInt(2, pageRoll.getPageSize());
			rs = ps.executeQuery();
			while (rs.next()) {
				Role role = new Role();
				role.setRoleID(rs.getInt(1));
				role.setRoleName(rs.getString(2));
				role.setDescription(rs.getString(3));
				list.add(role);
			}
			sql = "select count(*) from role";
			ps = conn.prepareStatement(sql);
			rs = ps.executeQuery();
			rs.next();
			pageRoll.setCountSize(rs.getInt(1));
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("查询角色列表失败");
		} finally {
			DBUtil.close(rs, ps, conn);
		}
		return list;
	}

	@Override
	public void update(Role role) throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		String sql = "update role set RoleName=?,Description=? where RoleID=?";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			ps.setString(1, role.getRoleName());
			ps.setString(2, role.getDescription());
			ps.setInt(3, role.getRoleID());
			ps.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("修改角色失败");
		} finally {
			DBUtil.close(null, ps, conn);
		}
	}

	@Override
	public Role findByRoleName(String roleName) throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		Role role = null;
		String sql = "select RoleID,RoleName,Description from role where RoleName=?";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			ps.setString(1, roleName);
			rs = ps.executeQuery();
			if (rs.next()) {
				role = new Role();
				role.setRoleID(rs.getInt(1));
				role.setRoleName(rs.getString(2));
				role.setDescription(rs.getString(3));
			}
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("根据角色名称查询角色信息失败");
		} finally {
			DBUtil.close(rs, ps, conn);
		}
		return role;
	}

	@Override
	public List<Role> list() throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		List<Role> list = new ArrayList<Role>();
		String sql = "select RoleID,RoleName,Description from role";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			rs = ps.executeQuery();
			while (rs.next()) {
				Role role = new Role();
				role.setRoleID(rs.getInt(1));
				role.setRoleName(rs.getString(2));
				role.setDescription(rs.getString(3));
				list.add(role);
			}
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("查询角色列表失败");
		} finally {
			DBUtil.close(rs, ps, conn);
		}
		return list;
	}
	

}