starting exposed new column types

Author: DevSrSouza

build.gradle.kts

@@ -46,6 +46,12 @@ subprojects {
         compileOnly("org.spigotmc:spigot-api:1.8.8-R0.1-SNAPSHOT")
     }
 
+    kotlin {
+        sourceSets.all {
+            languageSettings.useExperimentalAnnotation("kotlin.contracts.ExperimentalContracts")
+        }
+    }
+
     tasks {
         "shadowJar"(ShadowJar::class) {
             baseName = "KotlinBukkitAPI-${project.name}"

exposed/build.gradle.kts

@@ -0,0 +1,13 @@
+repositories {
+    maven {
+        name = "perfectdreams"
+        url = uri("https://repo.perfectdreams.net/")
+    }
+}
+
+
+dependencies {
+    compileOnly(project(":core"))
+    compileOnly(project(":attributestorage"))
+    compileOnly("org.jetbrains.exposed:exposed:0.11.2")
+}

exposed/src/main/kotlin/br/com/devsrsouza/exposed/Item.kt

@@ -0,0 +1,39 @@
+package br.com.devsrsouza.exposed
+
+import br.com.devsrsouza.kotlinbukkitapi.attributestorage.fromByteArrayItem
+import br.com.devsrsouza.kotlinbukkitapi.attributestorage.toByteArray
+import org.bukkit.inventory.ItemStack
+import org.jetbrains.exposed.sql.ColumnType
+import org.jetbrains.exposed.sql.Table
+import org.jetbrains.exposed.sql.transactions.TransactionManager
+import java.io.InputStream
+import java.sql.Blob
+
+fun Table.itemStack(name: String) = registerColumn<ItemStack>(name, ItemStackColumn())
+
+class ItemStackColumn : ColumnType() { // from BlobColumnType
+
+    private val currentDialect get() = TransactionManager.current().db.dialect
+
+    override fun sqlType(): String  = currentDialect.dataTypeProvider.blobType()
+
+    override fun nonNullValueToString(value: Any): String = when (value) {
+        is ItemStack -> value.toString()
+        else -> "?"
+    }
+
+    override fun valueFromDB(value: Any): Any = when (value) {
+        is ItemStack -> value
+        is ByteArray -> fromByteArrayItem(value)
+        is Blob -> fromByteArrayItem(value.getBytes(1, value.length().toInt()))
+        is InputStream -> fromByteArrayItem(value.readBytes())
+        else -> error("Unknown type for blob (ItemStack) column: ${value.javaClass}")
+    }
+
+    override fun notNullValueToDB(value: Any): Any {
+        return when (value) {
+            is ItemStack -> value.toByteArray()
+            else -> error("Unexpected value of type ItemStack: ${value.javaClass.canonicalName}")
+        }
+    }
+}