custom deserializer for accounts

That makes the polymorphism dynamic and not at compile time anymore. It allows using proper resource locations (with no namespace) and allows mods to add custom accounts

src/main/java/de/bixilon/minosoft/assets/util/InputStreamUtil.kt

@@ -16,6 +16,7 @@ package de.bixilon.minosoft.assets.util
 import com.fasterxml.jackson.module.kotlin.readValue
 import de.bixilon.kutil.buffer.BufferDefinition
 import de.bixilon.kutil.cast.CastUtil.unsafeCast
+import de.bixilon.kutil.json.JsonObject
 import de.bixilon.mbf.MBFBinaryReader
 import de.bixilon.minosoft.util.json.Jackson
 import de.matthiasmann.twl.utils.PNGDecoder
@@ -46,7 +47,7 @@ object InputStreamUtil {
         return builder.toString()
     }
 
-    fun InputStream.readJsonObject(close: Boolean = true): Map<String, Any> {
+    fun InputStream.readJsonObject(close: Boolean = true): JsonObject {
         try {
             return Jackson.MAPPER.readValue(this, Jackson.JSON_MAP_TYPE)
         } finally {

src/main/java/de/bixilon/minosoft/data/accounts/Account.kt

@@ -14,28 +14,17 @@
 package de.bixilon.minosoft.data.accounts
 
 import com.fasterxml.jackson.annotation.JsonIgnore
-import com.fasterxml.jackson.annotation.JsonSubTypes
-import com.fasterxml.jackson.annotation.JsonTypeInfo
 import de.bixilon.kutil.collections.CollectionUtil.synchronizedMapOf
 import de.bixilon.kutil.latch.AbstractLatch
 import de.bixilon.kutil.observer.DataObserver.Companion.observed
 import de.bixilon.minosoft.config.profile.profiles.account.AccountProfileManager
 import de.bixilon.minosoft.config.profile.profiles.eros.server.entries.AbstractServer
-import de.bixilon.minosoft.data.accounts.types.microsoft.MicrosoftAccount
-import de.bixilon.minosoft.data.accounts.types.mojang.MojangAccount
-import de.bixilon.minosoft.data.accounts.types.offline.OfflineAccount
 import de.bixilon.minosoft.data.entities.entities.player.properties.PlayerProperties
 import de.bixilon.minosoft.data.registries.identified.ResourceLocation
 import de.bixilon.minosoft.protocol.network.connection.play.PlayConnection
 import de.bixilon.minosoft.util.account.minecraft.MinecraftPrivateKey
 import java.util.*
 
-@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
-@JsonSubTypes(
-    JsonSubTypes.Type(value = MojangAccount::class, name = "minosoft:mojang_account"),
-    JsonSubTypes.Type(value = OfflineAccount::class, name = "minosoft:offline_account"),
-    JsonSubTypes.Type(value = MicrosoftAccount::class, name = "minosoft:microsoft_account"),
-)
 abstract class Account(
     val username: String,
 ) {

src/main/java/de/bixilon/minosoft/data/accounts/types/AccountTypes.kt

@@ -11,20 +11,16 @@
  * This software is not affiliated with Mojang AB, the original developer of Minecraft.
  */
 
-package de.bixilon.minosoft.util.json
+package de.bixilon.minosoft.data.accounts.types
 
-import de.bixilon.kutil.cast.CastUtil.unsafeCast
-import de.bixilon.minosoft.data.registries.identified.ResourceLocation
+import de.bixilon.minosoft.data.accounts.types.microsoft.MicrosoftAccount
+import de.bixilon.minosoft.data.accounts.types.mojang.MojangAccount
+import de.bixilon.minosoft.data.accounts.types.offline.OfflineAccount
 
-object ResourceLocationJsonMap {
-
-    fun Map<*, *>.toResourceLocationMap(): Map<ResourceLocation, Any> {
-        val ret: MutableMap<ResourceLocation, Any> = mutableMapOf()
-
-        for ((key, value) in this) {
-            ret[ResourceLocation.of(key.unsafeCast<String>())] = value.unsafeCast<Any>()
-        }
-
-        return ret
-    }
+object AccountTypes {
+    val types = mutableMapOf(
+        MicrosoftAccount.identifier to MicrosoftAccount::class,
+        MojangAccount.identifier to MojangAccount::class,
+        OfflineAccount.identifier to OfflineAccount::class,
+    )
 }

src/main/java/de/bixilon/minosoft/data/entities/event/EntityEvents.kt

@@ -17,15 +17,15 @@ import de.bixilon.kutil.cast.CollectionCast.asAnyMap
 import de.bixilon.kutil.json.JsonUtil.asJsonObject
 import de.bixilon.kutil.primitive.IntUtil.toInt
 import de.bixilon.minosoft.Minosoft
-import de.bixilon.minosoft.assets.util.InputStreamUtil.readJsonObject
+import de.bixilon.minosoft.assets.util.InputStreamUtil.readJson
 import de.bixilon.minosoft.data.entities.entities.Entity
 import de.bixilon.minosoft.data.entities.event.events.damage.*
 import de.bixilon.minosoft.data.registries.entities.DefaultEntityFactories
 import de.bixilon.minosoft.data.registries.factory.DefaultFactory
 import de.bixilon.minosoft.data.registries.identified.Namespaces.minosoft
+import de.bixilon.minosoft.data.registries.identified.ResourceLocation
 import de.bixilon.minosoft.protocol.versions.Version
 import de.bixilon.minosoft.util.KUtil.toResourceLocation
-import de.bixilon.minosoft.util.json.ResourceLocationJsonMap.toResourceLocationMap
 import de.bixilon.minosoft.util.logging.Log
 import de.bixilon.minosoft.util.logging.LogLevels
 import de.bixilon.minosoft.util.logging.LogMessageType
@@ -58,7 +58,7 @@ object EntityEvents : DefaultFactory<EntityEvent<*>>(
     }
 
     fun load() {
-        val json = Minosoft.MINOSOFT_ASSETS_MANAGER[FILE].readJsonObject().toResourceLocationMap()
+        val json: Map<ResourceLocation, Any> = Minosoft.MINOSOFT_ASSETS_MANAGER[FILE].readJson()
         for ((name, data) in json) {
             val clazz = DefaultEntityFactories.ABSTRACT_ENTITY_DATA_CLASSES[name]?.java ?: DefaultEntityFactories[name]?.javaClass // TODO: This is the companion class
             if (clazz == null) {

src/main/java/de/bixilon/minosoft/data/registries/fallback/FallbackRegistries.kt

@@ -15,7 +15,7 @@ package de.bixilon.minosoft.data.registries.fallback
 
 import de.bixilon.kutil.json.JsonUtil.asJsonObject
 import de.bixilon.minosoft.Minosoft
-import de.bixilon.minosoft.assets.util.InputStreamUtil.readJsonObject
+import de.bixilon.minosoft.assets.util.InputStreamUtil.readJson
 import de.bixilon.minosoft.data.container.equipment.EquipmentSlots
 import de.bixilon.minosoft.data.entities.EntityAnimations
 import de.bixilon.minosoft.data.entities.EntityObjectType
@@ -34,7 +34,6 @@ import de.bixilon.minosoft.data.registries.registries.registry.Registry
 import de.bixilon.minosoft.data.registries.registries.registry.ResourceLocationRegistry
 import de.bixilon.minosoft.protocol.packets.c2s.play.entity.EntityActionC2SP
 import de.bixilon.minosoft.protocol.packets.s2c.play.title.TitleS2CF
-import de.bixilon.minosoft.util.json.ResourceLocationJsonMap.toResourceLocationMap
 import de.bixilon.minosoft.util.logging.Log
 import de.bixilon.minosoft.util.logging.LogLevels
 import de.bixilon.minosoft.util.logging.LogMessageType
@@ -77,7 +76,7 @@ object FallbackRegistries {
         check(!initialized) { "Already initialized!" }
         Log.log(LogMessageType.OTHER, LogLevels.VERBOSE) { "Loading default registries..." }
 
-        val enumJson = Minosoft.MINOSOFT_ASSETS_MANAGER[ENUM_RESOURCE_LOCATION].readJsonObject().toResourceLocationMap()
+        val enumJson: Map<ResourceLocation, Any> = Minosoft.MINOSOFT_ASSETS_MANAGER[ENUM_RESOURCE_LOCATION].readJson()
 
         EQUIPMENT_SLOTS_REGISTRY.initialize(enumJson[ResourceLocation.of("equipment_slots")].asJsonObject())
         HAND_EQUIPMENT_SLOTS_REGISTRY.initialize(enumJson[ResourceLocation.of("hand_equipment_slots")].asJsonObject())
@@ -92,7 +91,7 @@ object FallbackRegistries {
         ENTITY_ACTIONS_REGISTRY.initialize(enumJson[ResourceLocation.of("entity_actions")].asJsonObject())
 
 
-        val registriesJson = Minosoft.MINOSOFT_ASSETS_MANAGER[REGISTRIES_RESOURCE_LOCATION].readJsonObject().toResourceLocationMap()
+        val registriesJson: Map<ResourceLocation, Any> = Minosoft.MINOSOFT_ASSETS_MANAGER[REGISTRIES_RESOURCE_LOCATION].readJson()
 
         DEFAULT_PLUGIN_CHANNELS_REGISTRY.initialize(registriesJson[ResourceLocation.of("default_channels")].asJsonObject(), PluginChannel)
 

src/main/java/de/bixilon/minosoft/util/json/AccountDeserializer.kt

@@ -0,0 +1,44 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020-2023 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.util.json
+
+import com.fasterxml.jackson.core.JsonParser
+import com.fasterxml.jackson.databind.DeserializationContext
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer
+import com.fasterxml.jackson.databind.module.SimpleModule
+import de.bixilon.kutil.json.JsonObject
+import de.bixilon.minosoft.data.accounts.Account
+import de.bixilon.minosoft.data.accounts.types.AccountTypes
+import de.bixilon.minosoft.util.KUtil.toResourceLocation
+
+
+object AccountDeserializer : SimpleModule() {
+
+    init {
+        addDeserializer(Account::class.java, Deserializer)
+    }
+
+    object Deserializer : StdDeserializer<Account>(Account::class.java) {
+
+        override fun deserialize(parser: JsonParser, context: DeserializationContext?): Account {
+            val codec = parser.codec
+            val root = codec.readValue<JsonObject>(parser, Jackson.JSON_MAP_TYPE)
+
+            val type = root["type"].toResourceLocation()
+            val clazz = AccountTypes.types[type] ?: throw IllegalArgumentException("Can not find account type $type!")
+
+            return Jackson.MAPPER.convertValue(root, clazz.java)
+        }
+    }
+}

src/main/java/de/bixilon/minosoft/util/json/Jackson.kt

@@ -46,6 +46,7 @@ object Jackson {
         )
         .registerModule(JavaTimeModule())
         .registerModule(ResourceLocationSerializer)
+        .registerModule(AccountDeserializer)
         .registerModule(RGBColorSerializer)
         .registerModule(ChatComponentColorSerializer)
         .registerModule(Vec2Serializer)