roledao.java

Java企业级开发项目实践,这是他的附光盘

//---------------------------------------------------------
// Application: Portal of Enterprice
// Author     : eSingle
// File       : RoleDAO.java
//
// Copyright 2002 LandSoft Corp.
// Generated at Mon Nov 18 19:57:10 CST 2002
// Created by caoguangxin
// mailto:[e-mail]
//---------------------------------------------------------

package com.landsoft.portal.managent.dao;

import java.io.*;
import java.sql.*;
import java.util.*;
import javax.sql.*;

import com.landsoft.portal.managent.model.*;
import com.landsoft.portal.managent.util.CacheManager;

public class RoleDAO
    extends DAO {

  public RoleDAO(DataSource ds) {
    super(ds);
  }

  public void insert(Role role) throws SQLException {
    String sql;
    sql = "INSERT INTO role (rolename, systemname) VALUES (?, ?)";
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, role.getRolename());
      pstmt.setString(2, role.getSystemname());
      pstmt.executeUpdate();
      pstmt.close();
      conn.commit();
    }
    catch (SQLException sqle) {
      close(rs);
      close(pstmt);
      rollback(conn);
      sqle.printStackTrace();
      throw sqle;
    }
    finally {
      close(conn);
    }
  }

  public void update(Role role) throws SQLException {
    Connection conn = null;
    PreparedStatement pstmt = null;
    try {
      conn = ds.getConnection();
      String sql = "UPDATE role SET  WHERE rolename=? AND systemname=?";
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, role.getRolename());
      pstmt.setString(2, role.getSystemname());
      pstmt.executeUpdate();
      close(pstmt);
      conn.commit();
    }
    catch (SQLException e) {
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
  }

  public void delete(String rolename, String systemname) throws SQLException {
    Connection conn = null;
    PreparedStatement pstmt = null;
    try {
      conn = ds.getConnection();
      String sql = "DELETE FROM role WHERE rolename=? AND systemname=?";
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, rolename);
      pstmt.setString(2, systemname);
      pstmt.executeUpdate();
      close(pstmt);
      conn.commit();
    }
    catch (SQLException e) {
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
    String[] objKeys = {
        "Role", String.valueOf(rolename), String.valueOf(systemname)};
    String objKey = CacheManager.createKey(objKeys);
    DAOCacheManager.invalidate(objKey);
  }

  public Role retrieve(String rolename, String systemname) throws SQLException {
    String[] objKeys = {
        "Role", String.valueOf(rolename), String.valueOf(systemname)};
    String objKey = CacheManager.createKey(objKeys);
    Role role = (Role) DAOCacheManager.getCache(objKey);
    if (role != null) {
      return role;
    }
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      String sql = "SELECT * FROM role WHERE rolename=? AND systemname=?";
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, rolename);
      pstmt.setString(2, systemname);
      rs = pstmt.executeQuery();
      if (rs.next()) {
        role = new Role();
        role.setRolename(rs.getString(1));
        role.setSystemname(rs.getString(2));
        populate(role, rs);
      }
      close(rs);
      close(pstmt);
    }
    catch (SQLException e) {
      close(rs);
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
    DAOCacheManager.putCache(role, objKey, 1);
    return role;
  }

  public List all() throws SQLException {
    ArrayList list = new ArrayList();
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      String sql = "SELECT rolename, systemname FROM role";
      pstmt = conn.prepareStatement(sql);
      rs = pstmt.executeQuery();
      while (rs.next()) {
        Role role = new Role();
        role.setRolename(rs.getString(1));
        role.setSystemname(rs.getString(2));
        populate(role, rs);
        list.add(role);
      }
      close(rs);
      close(pstmt);
    }
    catch (SQLException e) {
      close(rs);
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }

    return list;
  }

  public List list() throws SQLException {
    String[] objKeys = {
        "Role", "list"};
    String objKey = CacheManager.createKey(objKeys);
    ArrayList list = (ArrayList) DAOCacheManager.getCache(objKey);
    if (list != null) {
      return list;
    }
    list = new ArrayList();
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      String sql = "SELECT rolename, systemname FROM role";
      pstmt = conn.prepareStatement(sql);
      rs = pstmt.executeQuery();
      while (rs.next()) {
        Role role = new Role();
        role.setRolename(rs.getString(1));
        role.setSystemname(rs.getString(2));
        populate(role, rs);
        list.add(role);
      }
      close(rs);
      close(pstmt);
    }
    catch (SQLException e) {
      close(rs);
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
    DAOCacheManager.putCache(list, objKey, 1);
    return list;
  }

  public List list(int offset, int limit) throws SQLException {
    String[] objKeys = {
        "Role", "list", String.valueOf(offset), String.valueOf(limit)};
    String objKey = CacheManager.createKey(objKeys);
    ArrayList list = (ArrayList) DAOCacheManager.getCache(objKey);
    if (list != null) {
      return list;
    }
    list = new ArrayList();
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      String sql = "SELECT rolename, systemname FROM role";
      pstmt = conn.prepareStatement(sql);
      rs = pstmt.executeQuery();
      if (offset > 0) {
        rs.absolute(offset);
      }
      int recCount = 0;
      while ( (recCount++ < limit) && rs.next()) {
        Role role = new Role();
        role.setRolename(rs.getString(1));
        role.setSystemname(rs.getString(2));
        populate(role, rs);
        list.add(role);
      }
      close(rs);
      close(pstmt);
    }
    catch (SQLException e) {
      close(rs);
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
    DAOCacheManager.putCache(list, objKey, 1);
    return list;
  }

}