笔记：kotlin 学习第六天

1. StandClass

   /**
    * @ 文件名:   StandClass
    * @ 创建者:   ty
    * @ 时间:    2018/8/2 09:14
    * @ 描述:    实例化用户的姓名年龄地址信息
    */
   fun main(args: Array) {
   
       val person = Person("林青霞", 29, Address("深圳市", "宝安区", 10086))
       println(person.address.city + person.address.street + person.address.number)
   }
   
   class Address(var city: String, var street: String, var number: Int)
   
   data class Person(var name: String, var age: Int, var address: Address)
   

2. DSLClass

   /**
    * @ 文件名:   `02.DSLClass`
    * @ 创建者:   ty
    * @ 时间:    2018/8/2 09:15
    * @ 描述:    完成以下效果
   
    * 第一步：实现person函数，参数以及返回值，Person，Address初始化不能有参数。
    * 第二步：实现字段属性可以添加person对象，接收者为Person对象的函数
    * 第三步：执行block函数
   
    *  person{
    *      name = "徐熊丽"
    *      age = 20
    *      address{
    *          city = "深圳市"
    *          street = "宝安街道"
    *          number = 114
    *      }
    *  }
    */
   
   
   fun main(args: Array) {
       val person = person {
           name = "林青霞"
           age = 29
           address {
               city = "深圳市"
               street = "新安街道"
               number = 10000
           }
       }
   
       println(person.name + person.age)
   
   }
   
   fun address(block: Address.() -> Unit): Address {
       /*val address = Address()
       block(address)
       return address*/
       return Address().apply(block)
   }
   
   fun person(block: Person.() -> Unit): Person {
   
       /*val person = Person()
   
       block(person)
   
       return person*/
   
       return Person().apply(block)
   }
   
   class Address(var city: String? = null, var street: String? = null, var number: Int? = null)
   
   data class Person(var name: String? = null, var age: Int? = null, var address: Address? = null)
   

3. DSLHtml

   /**
    * @ 文件名:   `03.DSLHtml`
    * @ 创建者:   ty
    * @ 时间:    2018/8/2 09:16
    * @ 描述:    完成如下效果
    *
    *  html{
    *       head{
    *           title{
    *
    *           }
    *       }
    *       body{
    *           div{
    *
    *           }
    *       }
    *   }
    */
   
   fun main(args: Array) {
       val html = html {
           head {
               title {
   
               }
           }
           body {
               div {
   
               }
           }
       }
   
       println(html)
   
   }
   
   fun Body.div(block: () -> Unit) {
       val div = Div()
       setTag(div)
   }
   
   fun Head.title(block: () -> Unit) {
       val title = Title()
       setTag(title)
   }
   
   fun Html.body(block: Body.() -> Unit) {
       val body = Body()
       body.block()
       setTag(body)
   }
   
   fun Html.head(block: Head.() -> Unit) {
       val head = Head()
       head.block()
       setTag(head)
   }
   
   fun html(block: Html.() -> Unit): Html {
       val html = Html()
       html.block()
       return html
   }
   
   open class Tag(var name: String) {
       private val list = ArrayList()
   
       fun setTag(tag: Tag) {
           list.add(tag)
       }
   
       override fun toString(): String {
           val sb = StringBuilder()
           sb.append("<$name>")
           list.forEach {
               sb.append(it.toString())
           }
           sb.append("")
           return sb.toString()
       }
   }
   
   
   class Html : Tag("Html")
   
   class Head : Tag("Head")
   
   class Body : Tag("Body")
   
   class Title : Tag("Title")
   
   class Div : Tag("Div")
   

4. DSLHtml_缩小作用域

   /**
    * @ 文件名:   `04.DSLHtml_缩小作用域`
    * @ 创建者:   ty
    * @ 时间:    2018/8/2 09:20
    * @ 描述:    
    *       @DslMarker
    *       annotation class TAG
    */
   fun main(args: Array) {
       val html = html {
           head {
               title {
   
               }
           }
           body {
               div {
   
               }
           }
       }
   
       println(html)
   
   }
   
   fun Body.div(block: () -> Unit) {
       val div = Div()
       setTag(div)
   }
   
   fun Head.title(block: () -> Unit) {
       val title = Title()
       setTag(title)
   }
   
   fun Html.body(block: Body.() -> Unit) {
       val body = Body()
       body.block()
       setTag(body)
   }
   
   fun Html.head(block: Head.() -> Unit) {
       val head = Head()
       head.block()
       setTag(head)
   }
   
   fun html(block: Html.() -> Unit): Html {
       val html = Html()
       html.block()
       return html
   }
   
   @TAG
   open class Tag(var name: String) {
       private val list = ArrayList()
   
       fun setTag(tag: Tag) {
           list.add(tag)
       }
   
       override fun toString(): String {
           val sb = StringBuilder()
           sb.append("<$name>")
           list.forEach {
               sb.append(it.toString())
           }
           sb.append("")
           return sb.toString()
       }
   }
   
   
   class Html : Tag("Html")
   
   class Head : Tag("Head")
   
   class Body : Tag("Body")
   
   class Title : Tag("Title")
   
   class Div : Tag("Div")
   
   @DslMarker
   annotation class TAG
   

5. DSLClass_构建器设计模式

   /**
    * @ 文件名:   `05.DSLClass_构建器`
    * @ 创建者:   ty
    * @ 时间:    2018/8/2 09:18
    * @ 描述:    builder.build()
    * 字段可以赋值多次  需要只能赋值一次
    * 创建Person时不能传递字段  就需要默认值null  后面不能修改了
    * 创建Person时必须要传递字段
    * Person可以等到所有的字段都有了之后再创建
    *
    * 1,创建person  address 数据类，构造参数可空类型
    * 2,创建personBuilder addressBuilder构建类，有一个build函数返回person address对象。
    * 3,创建person address 高阶函数，
    * 4,由于一个人可能有多个地址，需要用一个集合字段装起来多个地址，定义一个MyList继承ArrayList
    * 5,同时person中有一个list字段addresses
    * 6,有个addresses的高阶方法，收集所有的地址
    *
    *  完成如下效果
    *  val person = person {
    *      name = "林志颖"
    *      age = 19
    *      addresses {
    *          address {
    *              city = "深圳市"
    *              street = "新安街道"
    *              number = 122
    *          }
    *          address {
    *              city = "重庆市"
    *              street = "照母山"
    *              number = 122
    *          }
    *      }
    *  }
    *
    *  Person(name=林志颖, age=19, addresses=[Address(city=深圳市, street=新安街道, number=122), Address(city=重庆市, street=照母山, number=122)])
    *
    */
   
   
   fun main(args: Array) {
   
       val person = person {
           name = "林志颖"
           age = 19
           addresses {
               address {
                   city = "深圳市"
                   street = "新安街道"
                   number = 122
               }
               address {
                   city = "重庆市"
                   street = "照母山"
                   number = 122
               }
           }
       }
   
       println(person)
   
   }
   
   
   fun MyList.address(block: AddressBuilder.() -> Unit) {
   
       val address = AddressBuilder()
       address.block()
       add(address.build())
   }
   
   fun PersonBuilder.addresses(block: MyList.() -> Unit) {
       val myList = MyList()
       myList.block()
       this.addresses = myList
   
   }
   
   class PersonBuilder {
       var name: String? = null
       var age: Int? = null
       var addresses: MyList? = null
       fun build(): Person {
           return Person(name, age, addresses)
       }
   }
   
   @MYCLASS
   class AddressBuilder {
       var city: String? = null
       var street: String? = null
       var number: Int? = null
       fun build(): Address {
           return Address(city, street, number)
       }
   }
   
   
   @MYCLASS
   fun person(block: PersonBuilder.() -> Unit): Person {
       val person = PersonBuilder()
       person.block()
       return person.build()
   }
   
   data class Address(val city: String?, val street: String?, val number: Int?)
   
   data class Person(val name: String?, val age: Int?, val addresses: MyList?)
   
   @MYCLASS
   class MyList : ArrayList
   ()
   
   @DslMarker
   annotation class MYCLASS