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ktmapping's Introduction

ktmapping

ktmapping 是基于ksp实现的kotlin专用的类mapstruct的映射工具

特性

  • 从Map/ResultSet映射到实体类
  • 以Map/ResultSet/实体类中的属性更新实体类
  • Map/ResultSet映射到实体类时根据配置的命名风格自动映射Map/Result中的属性
  • 来源对象的多个字段映射到目标对象的一个字段
  • 来源对象的一个字段映射到目标对象的多个字段
  • 编译期类型安全
注意事项
  • 所有属性复制都是浅拷贝
  • 以Map/ResultSet作为数据来源时生成的代码不是类型安全的，但是会在运行时抛出更加友好的错误提示
  • 不支持类型转换

基本规则

默认映射规则：默认按照属性名映射，实体类属性需要getter和setter，以Map/ResultSet为数据源时会假设数据源包含目标对象需要的所有属性

映射函数格式要求

  • 参数个数为1,类型为Map/ResultSet/自定义实体类
  • 返回值为自定义实体类
  • 创建目标对象时选择的构造器的规则：有主构造器用主构造器，没有主构造器时取参数最少的构造器
  • 构造器可见性必须为public
更新函数格式要求
  • 参数个数为2，第一个参数类型为Map/ResultSet/自定义实体类，第二个参数为自定义实体类
  • 返回值为Unit
  • 目标对象有可变属性

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