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README
Apache-2.0

LiteOrm:Android SQLite框架库

换个语种,再来一次

LiteOrm是一个速度快、小巧、强大的android ORM框架类库,让你一行代码实现数据库的增删改查操作,以及实体关系的持久化和自动映射。

目标:简单、强大、最有用的android ORM 框架库

在采用反射、注解,各种自动化处理的情况下LiteOrm框架比系统的SQLiteDatabase#insert方法性能好接近一倍。【基于系统,超越系统】坚持专注第一、兼顾性能、易用、拓展性。

10万条数插入对比系统API 10万条数插入对比系统API

100 000条数据测试 100 000条数据测试

使用案例1:http://blog.csdn.net/napoleonbai/article/details/41958725

使用案例2:http://www.apkbus.com/ask/article/13859

原则 :

  • 轻量、专注、性能优先、线程无关,专注数据及其关系存储和操作。
  • 无需工具辅助,不需要无参构造,不需要繁多注解,约定优于配置。
  • 使用极致简约,例如:db.save(u); db.query(U.class); db.deleteAll(U.class);

特色 :

  • 支持多库:每个数据库文件对应一个LiteOrm管理类实例。
  • SD卡存储:可以将DB文件放在你认为合理的位置。
  • 自动建表:开发者无需关心数据库以及表细节。
  • 关系存储和恢复:真正实现实体关系映射持久化以及恢复,只需在实体的关联属性上标出关系类型即可。
  • 独立和级联:可平滑切换,独立操作性能高,仅保存该对象数据;级联操作更强大,关联对象和关系一并保存。
  • 智能列探测:App升级或者Model改变,新加了属性字段,该字段将被探测到并加入数据库中,因此无需担心新字段不被存储。
  • 丰富API支持:save(replace), insert, update, delete, query, mapping, etc。
  • 自动识别类型:分别转化为以sqlite支持的TEXT, REAL, INTEGER, BLOB几种数据类型存储。
  • 自动构建对象,通过反射和探测构造函数参数等hack手法新建对象,大多情况下亦不需要无参构造函数。
  • 更新指定列,可灵活、强制、批量赋值,强制赋值将无视被操作对象的真实值。
  • 存储序列化字段:Date、ArrayList、Vector等各种容器智能保存及读取。
  • 约束性语法支持:NOT NULL, UNIQUE, DEFAULT, COLLATE, CHECK, PRIMARY KEY,支持冲突算法。
  • 灵活的查询和删除:columns, where, roder, limit, having group, etc。

未来:

  • 信息加密功能,防止破库后数据裸奔。
  • 数据校验功能,防止破库后数据篡改。

##关于基础功能 需求左右功能,需求是没有界限的,不可能完美满足所有需求,做框架就有取舍。

当一个人为了挂壁画而去买电钻时,难道他买的不是墙上的洞吗?

如果能提供打洞兼挂壁画的服务,不是更方便更让用户满意吗?

回头再想一下用户买了电钻,仅为了挂壁画吗?还可能用来做更多的事。

做框架时基础功能是要提供的,但也会提供一些更直接、更专项的接口来更便捷的让开发者完成任务。

##关于设计理念

LiteOrm 大多情况下不要求开发者为每个对象添加一个无参构造,这看起来傻傻的很多余。

LiteOrm 主线思路是约定大于配置,所以你可以用极少的注解完成复杂数据的存储。

LiteOrm 关注性能,代码每个模块我都有仔细琢磨,各个功能的实现绕过了android提供的直接接口而比较贴近底层的实现。

LiteOrm 超级轻量、专注,你甚至看不到任何包括线程在内的其他功能存在,你根本不用担心增加你项目的负担,引入一个大包袱。

简约的背后,往往是复杂。而这一切,就是为了还原面向对象本应有的体验,让增加的部分,并未增加。

关于作者(About Author)

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LiteHttp:简单智能的 android HTTP 框架库 (专注于网络)

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关于java的线程并发和锁的总结

android开发技术经验总结60条

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简介

LiteOrm is a fast, small, powerful ORM framework for Android. LiteOrm makes you do CRUD operarions on SQLite database with a sigle line of code efficiently. implementation 'com.githang:android-lite-orm:1.9.3' 展开 收起
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