class="kw">package com.hypixel.hytale.codec.lookup;

class="kw">import com.hypixel.hytale.codec.ExtraInfo;
class="kw">import com.hypixel.hytale.codec.builder.BuilderCodec;
class="kw">import java.util.Objects;
class="kw">import javax.annotation.Nonnull;
class="kw">import javax.annotation.Nullable;
class="kw">import org.bson.BsonDocument;
class="kw">import org.bson.BsonValue;

class="kw">public class="kw">final class Deferred<T> {
   @Nonnull
   class="kw">private class="kw">final BuilderCodecMapCodec<T> codec;
   @Nullable
   class="kw">private class="kw">volatile BsonDocument document;
   @Nullable
   class="kw">private class="kw">volatile T value;

   class="kw">public Deferred(@Nonnull BuilderCodecMapCodec<T> var1) {
      this(var1, null);
   }

   Deferred(@Nonnull BuilderCodecMapCodec<T> var1, @Nullable BsonDocument var2) {
      this.codec = var1;
      this.document = var2;
   }

   @Nullable
   class="kw">public T get() {
      Object var1 = this.value;
      if (var1 != null) {
         class="kw">return var1;
      }

      class="kw">synchronized (this) {
         var1 = this.value;
         if (var1 != null) {
            class="kw">return var1;
         }

         var1 = this.decode();
         this.value = var1;
         if (var1 != null) {
            this.document = null;
         }

         class="kw">return var1;
      }
   }

   class="kw">public void set(@Nonnull T var1) {
      Objects.requireNonNull(var1, "value parameter can't be null");
      class="kw">synchronized (this) {
         this.value = var1;
         this.document = null;
      }
   }

   class="kw">public boolean isEmpty() {
      class="kw">return this.document == null && this.value == null && this.codec.getDefaultCodec() == null;
   }

   @Nullable
   BsonDocument getDocument() {
      class="kw">return this.value == null ? this.document : null;
   }

   @Nullable
   class="kw">private T decode() {
      BsonDocument var1 = this.document;
      if (var1 == null) {
         BuilderCodec var3 = this.codec.getDefaultCodec();
         class="kw">return (T)(var3 == null ? null : var3.getDefaultValue());
      } else {
         BsonValue var2 = var1.get(this.codec.getKey());
         if (var2 != null && this.codec.getCodecFor(var2.asString().getValue()) == null) {
            throw new IllegalStateException(
               "No codec is registered for the type \"" + var2.asString().getValue() + "\" that \"" + this.codec.getKey() + "\" names"
            );
         } else {
            class="kw">return this.codec.decode(var1, ExtraInfo.THREAD_LOCAL.get());
         }
      }
   }
}