package kim.hsl.protobuf
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import com.alibaba.fastjson.JSON
import com.example.tutorial.protos.AddressBook
import com.example.tutorial.protos.Person
import com.google.gson.Gson
class MainActivity : AppCompatActivity() {
    companion object{
        val TAG = "MainActivity"
    }
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        // 测试 Protobuf 性能
        protobufTest()
        // 测试 Json 性能
        JsonTest().jsonTest()
    }
    fun protobufTest(){
        // 创建 Person.PhoneNumber.Builder 对象
        var phoneNumber1Builder: Person.PhoneNumber.Builder =
            Person.PhoneNumber.newBuilder().
            setNumber("666")
        // 创建 Person.Builder 对象
        var person1Builder: Person.Builder =
            Person.newBuilder().
            setName("Tom").
            setId(0).
            addPhones(phoneNumber1Builder)
        // 创建 Person.PhoneNumber.Builder 对象
        var phoneNumber2Builder: Person.PhoneNumber.Builder =
            Person.PhoneNumber.newBuilder().
            setNumber("888")
        // 创建 Person.Builder 对象
        var person2Builder: Person.Builder =
            Person.newBuilder().
            setName("Jerry").
            setId(1).
            addPhones(phoneNumber2Builder)
        // 使用 newBuilder 方法创建 AddressBook.Builder 对象
        var addressBookBuilder: AddressBook.Builder =
            AddressBook.newBuilder().
            addPeople(person1Builder).
            addPeople(person2Builder)
        // 将上述各个 Builder 拼装完毕后 , 最后调用 build
        // 即可得到最终对象
        var addressBook: AddressBook = addressBookBuilder.build()
        // 序列化操作
        var serializeStart = System.currentTimeMillis()
        // 将 addressBook 对象转为字节数组
        var bytes: ByteArray = addressBook.toByteArray()
        Log.i(TAG, "序列化耗时 ${System.currentTimeMillis() - serializeStart} ms , " +
                "序列化大小 ${bytes.size} 字节")
        // 反序列化操作
        var deserializeStart = System.currentTimeMillis()
        var deserializeAddressBook: AddressBook = AddressBook.parseFrom(bytes)
        Log.i(TAG, "反序列化耗时 ${System.currentTimeMillis() - deserializeStart} ms")
    }
}

package kim.hsl.protobuf
import android.util.Log
import com.alibaba.fastjson.JSON
import com.google.gson.Gson
class JsonTest {
    fun jsonTest(){
        // json 测试
        // 初始化 kim.hsl.protobuf.AddressBook 对象
        var addressBook: AddressBook = AddressBook()
        addressBook.persons = mutableListOf(
            Person("Tom", 0, "", mutableListOf(PhoneNumber("666", PhoneNumber.PhoneType.MOBILE))),
            Person("Jerry", 1, "", mutableListOf(PhoneNumber("888", PhoneNumber.PhoneType.MOBILE)))
        )
        // 测试 fastjson
        var fastjsonStart = System.currentTimeMillis()
        // fastjson 序列化 : 将 addressBook 转为 json 字符串
        var jsonString: String = JSON.toJSONString(addressBook)
        // 将字符串转为 Byte 数组
        var bytes = jsonString.toByteArray()
        Log.i(
            MainActivity.TAG, "fastjson 序列化耗时 ${System.currentTimeMillis() - fastjsonStart} ms , " +
                "序列化大小 ${bytes.size} 字节")
        fastjsonStart = System.currentTimeMillis()
        // 序列化操作
        JSON.parseObject(String(bytes), com.example.tutorial.protos.AddressBook::class.java)
        Log.i(MainActivity.TAG, "fastjson 反序列化耗时 ${System.currentTimeMillis() - fastjsonStart} ms")
        // 测试 gson
        var gsonStart = System.currentTimeMillis()
        // gson 序列化 : 将 addressBook 转为 json 字符串
        jsonString = Gson().toJson(addressBook)
        // 将字符串转为 Byte 数组
        bytes = jsonString.toByteArray()
        Log.i(
            MainActivity.TAG, "gson 序列化耗时 ${System.currentTimeMillis() - gsonStart} ms , " +
                "序列化大小 ${bytes.size} 字节")
        gsonStart = System.currentTimeMillis()
        Gson().fromJson(String(bytes), com.example.tutorial.protos.AddressBook::class.java)
        Log.i(MainActivity.TAG, "gson 反序列化耗时 ${System.currentTimeMillis() - gsonStart} ms")
    }
}
class PhoneNumber{
    enum class PhoneType{
        MOBILE,
        HOME,
        WORK;
    }
    var number: String = ""
    var type: PhoneType = PhoneType.MOBILE
    constructor(number: String, type: PhoneType) {
        this.number = number
        this.type = type
    }
}
class Person{
    lateinit var name: String
    var id: Int = 0
    var email: String = ""
    var phones: MutableList<PhoneNumber> = mutableListOf()
    constructor(name: String, id: Int, email: String, phones: MutableList<PhoneNumber>) {
        this.name = name
        this.id = id
        this.email = email
        this.phones = phones
    }
}
class AddressBook{
    var persons: MutableList<Person> = mutableListOf()
}

2021-04-27 22:51:02.513 16698-16698/kim.hsl.protobuf I/MainActivity: 序列化耗时 4 ms , 序列化大小 34 字节
2021-04-27 22:51:02.515 16698-16698/kim.hsl.protobuf I/MainActivity: 反序列化耗时 2 ms
2021-04-27 22:51:02.539 16698-16698/kim.hsl.protobuf I/MainActivity: fastjson 序列化耗时 21 ms , 序列化大小 169 字节
2021-04-27 22:51:02.568 16698-16698/kim.hsl.protobuf I/MainActivity: fastjson 反序列化耗时 29 ms
2021-04-27 22:51:02.597 16698-16698/kim.hsl.protobuf I/MainActivity: gson 序列化耗时 29 ms , 序列化大小 169 字节
2021-04-27 22:51:02.609 16698-16698/kim.hsl.protobuf I/MainActivity: gson 反序列化耗时 12 ms