From a99dab51b4cacc7294961a3a46313c03af2db61e Mon Sep 17 00:00:00 2001
From: DBotThePony <dbotthepony@yandex.ru>
Date: Sun, 29 Jan 2023 23:19:40 +0700
Subject: [PATCH] fix enums

---
 .../mc/otm/core/util/DataStreams.kt           | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/DataStreams.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/DataStreams.kt
index 516a47e4d..83ca6a005 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/DataStreams.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/DataStreams.kt
@@ -76,7 +76,7 @@ val VarLongValueCodec = StreamCodec(DataInputStream::readVarLongLE, DataOutputSt
 val BinaryStringCodec = StreamCodec(DataInputStream::readBinaryString, DataOutputStream::writeBinaryString)
 
 class EnumValueCodec<V : Enum<V>>(clazz: Class<out V>, val writeByIndices: Boolean = false) : IStreamCodec<V> {
-	private val values = clazz.enumConstants ?: throw ClassCastException("$clazz does not have enum constants. Not an enum?")
+	private val values = search(clazz) ?: throw ClassCastException("$clazz does not have enum constants. Not an enum?")
 
 	override fun read(stream: DataInputStream): V {
 		if (writeByIndices) {
@@ -102,6 +102,23 @@ class EnumValueCodec<V : Enum<V>>(clazz: Class<out V>, val writeByIndices: Boole
 	override fun compare(a: V, b: V): Boolean {
 		return a === b
 	}
+
+	companion object {
+		/**
+		 * FIXME: enums with abstract methods which get compiled to subclasses, whose DO NOT expose "parent's" enum constants array
+		 *
+		 * is there an already existing solution?
+		 */
+		fun <V : Enum<V>> search(clazz: Class<out V>): Array<V>? {
+			var search: Class<*> = clazz
+
+			while (search.enumConstants == null && search.superclass != null) {
+				search = search.superclass
+			}
+
+			return search.enumConstants as? Array<V>
+		}
+	}
 }
 
 fun OutputStream.writeInt(value: Int) {