feat(game.data): extended GsonHelper

src/main/java/org/auioc/mcmod/arnicalib/game/data/GsonHelper.java

@@ -0,0 +1,38 @@
+package org.auioc.mcmod.arnicalib.game.data;
+
+import java.util.function.Function;
+import java.util.function.IntFunction;
+import java.util.function.Supplier;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+public class GsonHelper extends net.minecraft.util.GsonHelper {
+
+    public static <T> T[] convertToArray(JsonArray json, IntFunction<T[]> generator, Function<JsonElement, T> converter) {
+        final var array = generator.apply(json.size());
+        int i = 0;
+        for (var jsonElement : json) {
+            array[i] = converter.apply(jsonElement);
+            i++;
+        }
+        return array;
+    }
+
+    public static <T> T[] getAsArray(JsonObject json, String key, IntFunction<T[]> generator, Function<JsonElement, T> converter) {
+        return convertToArray(getAsJsonArray(json, key), generator, converter);
+    }
+
+    public static <T> T[] getAsArray(JsonObject json, String key, IntFunction<T[]> generator, Function<JsonElement, T> converter, Supplier<T[]> fallback) {
+        return (json.has(key)) ? getAsArray(json, key, generator, converter) : fallback.get();
+    }
+
+    public static <T> T[] getAsArray(JsonObject json, String key, IntFunction<T[]> generator, Function<JsonElement, T> converter, T[] fallback) {
+        return getAsArray(json, key, generator, converter, () -> fallback);
+    }
+
+    public static <T> T[] getAsArray(JsonObject json, String key, IntFunction<T[]> generator, Function<JsonElement, T> converter, boolean fallback) {
+        return (fallback) ? getAsArray(json, key, generator, converter, () -> generator.apply(0)) : getAsArray(json, key, generator, converter);
+    }
+
+}