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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)
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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)
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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")
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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
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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
