DTN dedicated Animation Format: Loader's Holder

allow getting the value
make accquiring the holder thread-safe

Author: DashieDev

src/main/java/doggytalents/client/entity/model/animation/DTNAnimationLoader.java

@@ -4,11 +4,13 @@
 import java.util.HashSet;
 import java.util.Locale;
 import java.util.Map;
+import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+import com.google.common.collect.MapMaker;
 import com.google.gson.Gson;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonParseException;
@@ -32,7 +34,8 @@ public class DTNAnimationLoader extends SimpleJsonResourceReloadListener {
 
     public static final Logger LOGGER = LogManager.getLogger(Constants.MOD_ID + "/animationLoader");
 
-    private final Map<ResourceLocation, DogAnimationHolder> holderMap = new HashMap<>();
+    private final Map<ResourceLocation, DogAnimationHolder> holderMap = new MapMaker()
+        .concurrencyLevel(1).makeMap();
 
     private DTNAnimationLoader() {
         super(new Gson(), createRegistryPath());
@@ -126,7 +129,7 @@ public DogAnimationHolder getAnim(ResourceLocation id) {
             k -> new DogAnimationHolder(null));
     }
 
-    public static class DogAnimationHolder {
+    public static class DogAnimationHolder implements Supplier<AnimationDefinition> {
 
         private AnimationDefinition value;
 
@@ -141,6 +144,11 @@ public void update(AnimationDefinition newValue) {
         public void invalidate() {
             this.value = null;
         }
+
+        @Override
+        public AnimationDefinition get() {
+            return this.value;
+        }
     }
 
     public static final DTNAnimationLoader INSTANCE = new DTNAnimationLoader();