use kotlin serialize

build.gradle

@@ -7,15 +7,21 @@ buildscript {
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "com.github.jengelman.gradle.plugins:shadow:5.2.0"
+        classpath "org.jetbrains.kotlin:kotlin-serialization:$kotlin_version"
     }
 }
 
+plugins {
+    id 'org.jetbrains.kotlin.plugin.serialization' version '1.5.21'
+}
+
 tasks.withType(JavaCompile) {
     sourceCompatibility = JavaVersion.VERSION_11
     targetCompatibility = JavaVersion.VERSION_11
 }
 
 apply plugin: 'kotlin'
+apply plugin: 'kotlinx-serialization'
 apply plugin: "com.github.johnrengelman.shadow"
 apply plugin: 'application'
 
@@ -43,13 +49,15 @@ dependencies {
     compile 'org.jetbrains.exposed:exposed-jdbc:0.33.1'
     compile 'org.jetbrains.exposed:exposed-java-time:0.33.1'
     compile 'com.zaxxer:HikariCP:5.0.0'
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.2.2"
+    implementation "org.jetbrains.kotlinx:kotlinx-datetime:0.2.1"
     implementation "io.insert-koin:koin-core:$koin_version"
     implementation "io.insert-koin:koin-ktor:$koin_version"
+    implementation "io.ktor:ktor-serialization:$ktor_version"
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "io.ktor:ktor-server-netty:$ktor_version"
     implementation "ch.qos.logback:logback-classic:$logback_version"
     implementation "io.ktor:ktor-server-core:$ktor_version"
-    implementation "io.ktor:ktor-gson:$ktor_version"
     implementation "io.ktor:ktor-server-host-common:$ktor_version"
     implementation "io.ktor:ktor-client-core:$ktor_version"
     implementation "io.ktor:ktor-client-core-jvm:$ktor_version"

src/Application.kt

@@ -5,11 +5,11 @@ import io.ktor.application.*
 import io.ktor.response.*
 import io.ktor.routing.*
 import io.ktor.http.*
-import io.ktor.gson.*
 import io.ktor.features.*
 import org.apache.http.HttpException
 import com.kmalbz.database.DatabaseFactory
 import com.kmalbz.database.dao.ResultObjects
+import io.ktor.serialization.*
 import io.ktor.util.KtorExperimentalAPI
 import org.jetbrains.exposed.sql.SchemaUtils
 import org.jetbrains.exposed.sql.transactions.transaction
@@ -21,8 +21,7 @@ fun main(args: Array<String>): Unit = io.ktor.server.netty.EngineMain.main(args)
 @Suppress("unused") // Referenced in application.conf
 fun Application.module() {
     install(ContentNegotiation) {
-        gson {
+        json()
-        }
     }
 
     install(Koin) {

src/api/model/ApiObject.kt

@@ -1,9 +1,9 @@
 package com.kmalbz.api.model
 
-import com.google.gson.annotations.SerializedName
+import kotlinx.serialization.Serializable
-import java.util.*
 
+@Serializable
 data class ApiObject(
-    @SerializedName("tag") val tag: String,
+   val tag: String,
-    @SerializedName("probability") val probability: Double
+    val probability: Double
 )

src/api/route/OutputServiceRDBServer.kt

@@ -6,11 +6,9 @@ import io.ktor.http.HttpStatusCode
 import io.ktor.response.respond
 import io.ktor.routing.Routing
 import io.ktor.routing.get
+import kotlinx.datetime.LocalDateTime
 import org.koin.ktor.ext.inject
-import java.time.LocalDate
+
-import java.time.format.DateTimeFormatter
-import kotlin.math.ceil
-import kotlin.math.roundToInt
 
 /**
  * Output Service - RDB
@@ -40,41 +38,39 @@ class OutputServiceRDBServer {
 
         get("/output/filter/negative") {
             val resultList =
-                resultObjectService.getResultObjecLessthanProbability(0.5) ?: call.respond(HttpStatusCode.NotFound)
+                resultObjectService.getResultObjecLessthanProbability(0.5)
 
             call.respond(resultList)
         }
 
         get("/output/filter/positive") {
             val resultList =
-                resultObjectService.getResultObjecGreaterthanProbability(0.5) ?: call.respond(HttpStatusCode.NotFound)
+                resultObjectService.getResultObjecGreaterthanProbability(0.5)
 
             call.respond(resultList)
         }
 
         get("/output/filter/undecided") {
             val resultList =
-                resultObjectService.getResultObjecEqualsProbability(0.5) ?: call.respond(HttpStatusCode.NotFound)
+                resultObjectService.getResultObjecEqualsProbability(0.5)
 
             call.respond(resultList)
         }
 
         get("/output/after/{dateAfter}") {
             val dateAfter = call.parameters["dateAfter"] ?: error(HttpStatusCode.NotAcceptable)
-            val dateTimeFormatter: DateTimeFormatter = DateTimeFormatter.ISO_LOCAL_DATE
+            val localDateAfter: LocalDateTime = LocalDateTime.parse(dateAfter)
-            val localDateAfter: LocalDate = LocalDate.parse(dateAfter, dateTimeFormatter)
             val resultList =
-                resultObjectService.getResultObjectafterDate(localDateAfter) ?: call.respond(HttpStatusCode.NotFound)
+                resultObjectService.getResultObjectafterDate(localDateAfter)
 
             call.respond(resultList)
         }
 
         get("/output/before/{dateBefore}") {
             val dateAfter = call.parameters["dateBefore"] ?: error(HttpStatusCode.NotAcceptable)
-            val dateTimeFormatter: DateTimeFormatter = DateTimeFormatter.ISO_LOCAL_DATE
+            val localDateBefore: LocalDateTime = LocalDateTime.parse(dateAfter)
-            val localDateBefore: LocalDate = LocalDate.parse(dateAfter, dateTimeFormatter)
             val resultList =
-                resultObjectService.getResultObjectbeforeDate(localDateBefore) ?: call.respond(HttpStatusCode.NotFound)
+                resultObjectService.getResultObjectbeforeDate(localDateBefore)
 
             call.respond(resultList)
         }

src/database/dao/ResultObjects.kt

@@ -2,12 +2,12 @@ package com.kmalbz.database.dao
 
 import org.jetbrains.exposed.dao.id.IntIdTable
 import org.jetbrains.exposed.sql.*
-import org.jetbrains.exposed.sql.`java-time`.date
+import org.jetbrains.exposed.sql.`java-time`.datetime
-import java.time.LocalDate
+import java.time.LocalDateTime
 
 object ResultObjects : IntIdTable() {
     val tag: Column<String> = varchar("tag", 32)
-    val date: Column<LocalDate> = date("date").default(LocalDate.now())
+    val date: Column<LocalDateTime> = datetime("date").default(LocalDateTime.now())
     val probability: Column<Double> = double("probability")
     override val primaryKey = PrimaryKey(id, name = "PK_ResultObject_Id")
 }

src/database/service/IResultObjectService.kt

@@ -1,8 +1,7 @@
 package com.kmalbz.database.service
 
 import com.kmalbz.api.model.ApiObject
-import java.time.LocalDate
+import kotlinx.datetime.LocalDateTime
-import java.util.*
 
 interface IResultObjectService{
     fun addOne(apiObject: ApiObject)
@@ -10,10 +9,10 @@ interface IResultObjectService{
     suspend fun getCount(): Long
     suspend fun getPage(page: Long): List<ApiObject>
     suspend fun getResultObjectbyTag(tag: String): ApiObject?
-    suspend fun getResultObjectbyDate(date: LocalDate): List<ApiObject>?
+    suspend fun getResultObjectbyDate(date: LocalDateTime): List<ApiObject>
-    suspend fun getResultObjectbeforeDate(date: LocalDate): List<ApiObject>?
+    suspend fun getResultObjectbeforeDate(date: LocalDateTime): List<ApiObject>
-    suspend fun getResultObjectafterDate(date: LocalDate): List<ApiObject>?
+    suspend fun getResultObjectafterDate(date: LocalDateTime): List<ApiObject>
-    suspend fun getResultObjecGreaterthanProbability(probability: Double): List<ApiObject>?
+    suspend fun getResultObjecGreaterthanProbability(probability: Double): List<ApiObject>
-    suspend fun getResultObjecLessthanProbability(probability: Double): List<ApiObject>?
+    suspend fun getResultObjecLessthanProbability(probability: Double): List<ApiObject>
-    suspend fun getResultObjecEqualsProbability(probability: Double): List<ApiObject>?
+    suspend fun getResultObjecEqualsProbability(probability: Double): List<ApiObject>
 }

src/database/service/ResultObjectService.kt

@@ -4,12 +4,12 @@ import com.kmalbz.database.DatabaseFactory.dbQuery
 import com.kmalbz.database.model.ResultObject
 import com.kmalbz.database.dao.ResultObjects
 import com.kmalbz.api.model.ApiObject
+import kotlinx.datetime.LocalDateTime
+import kotlinx.datetime.toJavaLocalDateTime
 import org.jetbrains.exposed.sql.ResultRow
 import org.jetbrains.exposed.sql.select
 import org.jetbrains.exposed.sql.selectAll
 import org.jetbrains.exposed.sql.transactions.transaction
-import java.time.LocalDate
-import java.util.*
 
 
 class ResultObjectService : IResultObjectService {
@@ -42,37 +42,37 @@ class ResultObjectService : IResultObjectService {
             .singleOrNull()
     }
 
-    override suspend fun getResultObjectbyDate(date: LocalDate): List<ApiObject>? = dbQuery {
+    override suspend fun getResultObjectbyDate(date: LocalDateTime): List<ApiObject> = dbQuery {
         ResultObjects.select {
-            (ResultObjects.date eq date)
+            (ResultObjects.date eq date.toJavaLocalDateTime())
         }.mapNotNull { toResultObject(it) }
     }
 
-    override suspend fun getResultObjectbeforeDate(date: LocalDate): List<ApiObject>? = dbQuery {
+    override suspend fun getResultObjectbeforeDate(date: LocalDateTime): List<ApiObject> = dbQuery {
         ResultObjects.select {
-            (ResultObjects.date less  date)
+            (ResultObjects.date less  date.toJavaLocalDateTime())
         }.mapNotNull { toResultObject(it) }
     }
 
-    override suspend fun getResultObjectafterDate(date: LocalDate): List<ApiObject>? = dbQuery {
+    override suspend fun getResultObjectafterDate(date: LocalDateTime): List<ApiObject> = dbQuery {
         ResultObjects.select {
-            (ResultObjects.date greater  date)
+            (ResultObjects.date greater  date.toJavaLocalDateTime())
         }.mapNotNull { toResultObject(it) }
     }
 
-    override suspend fun getResultObjecGreaterthanProbability(probability: Double): List<ApiObject>? = dbQuery {
+    override suspend fun getResultObjecGreaterthanProbability(probability: Double): List<ApiObject> = dbQuery {
         ResultObjects.select {
             (ResultObjects.probability greater  probability)
         }.mapNotNull { toResultObject(it) }
     }
 
-    override suspend fun getResultObjecLessthanProbability(probability: Double): List<ApiObject>? = dbQuery {
+    override suspend fun getResultObjecLessthanProbability(probability: Double): List<ApiObject> = dbQuery {
         ResultObjects.select {
             (ResultObjects.probability less  probability)
         }.mapNotNull { toResultObject(it) }
     }
 
-    override suspend fun getResultObjecEqualsProbability(probability: Double): List<ApiObject>? = dbQuery {
+    override suspend fun getResultObjecEqualsProbability(probability: Double): List<ApiObject> = dbQuery {
         ResultObjects.select {
             (ResultObjects.probability eq  probability)
         }.mapNotNull { toResultObject(it) }