笔记：kotlin 学习第六天

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<String>) {

    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)

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<String>) {
    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)

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<String>) {
    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<Tag>()

    fun setTag(tag: Tag) {
        list.add(tag)
    }

    override fun toString(): String {
        val sb = StringBuilder()
        sb.append("<$name>")
        list.forEach {
            sb.append(it.toString())
        }
        sb.append("</$name>")
        return sb.toString()
    }
}


class Html : Tag("Html")

class Head : Tag("Head")

class Body : Tag("Body")

class Title : Tag("Title")

class Div : Tag("Div")

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<String>) {
    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<Tag>()

    fun setTag(tag: Tag) {
        list.add(tag)
    }

    override fun toString(): String {
        val sb = StringBuilder()
        sb.append("<$name>")
        list.forEach {
            sb.append(it.toString())
        }
        sb.append("</$name>")
        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

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<String>) {

    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<Address>()

@DslMarker
annotation class MYCLASS