AMapProvidedMapCodec.java

package com.hypixel.hytale.codec.lookup;

import com.hypixel.hytale.codec.Codec;
import com.hypixel.hytale.codec.ExtraInfo;
import com.hypixel.hytale.codec.exception.CodecException;
import com.hypixel.hytale.codec.schema.SchemaContext;
import com.hypixel.hytale.codec.schema.config.ObjectSchema;
import com.hypixel.hytale.codec.schema.config.Schema;
import com.hypixel.hytale.codec.util.RawJsonReader;
import com.hypixel.hytale.codec.validation.ValidatableCodec;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import java.util.function.Function;
import java.util.stream.Collectors;
import javax.annotation.Nonnull;
import org.bson.BsonDocument;
import org.bson.BsonValue;

public abstract class AMapProvidedMapCodec<K, V, P, M extends Map<K, V>> implements Codec<M>, ValidatableCodec<M> {
   protected final Map<K, P> codecProvider;
   protected final Function<P, Codec<V>> mapper;
   protected final boolean unmodifiable;

   public AMapProvidedMapCodec(Map<K, P> codecProvider, Function<P, Codec<V>> mapper) {
      this(codecProvider, mapper, true);
   }

   public AMapProvidedMapCodec(Map<K, P> codecProvider, Function<P, Codec<V>> mapper, boolean unmodifiable) {
      this.codecProvider = codecProvider;
      this.mapper = mapper;
      this.unmodifiable = unmodifiable;
   }

   public abstract M createMap();

   public void handleUnknown(M map, @Nonnull String key, BsonValue value, @Nonnull ExtraInfo extraInfo) {
      extraInfo.addUnknownKey(key);
   }

   public void handleUnknown(M map, @Nonnull String key, @Nonnull RawJsonReader reader, @Nonnull ExtraInfo extraInfo) throws IOException {
      extraInfo.addUnknownKey(key);
      reader.skipValue();
   }

   public M decode(@Nonnull BsonValue bsonValue, @Nonnull ExtraInfo extraInfo) {
      BsonDocument bsonDocument = bsonValue.asDocument();
      M map = this.createMap();

      for(Map.Entry<String, BsonValue> entry : bsonDocument.entrySet()) {
         extraInfo.pushKey((String)entry.getKey());

         try {
            K key = (K)this.getKeyForId((String)entry.getKey());
            if (key == null) {
               this.handleUnknown(map, (String)entry.getKey(), (BsonValue)entry.getValue(), extraInfo);
            } else {
               Codec<V> codecFor = this.getCodecFor(key);
               map.put(key, codecFor.decode((BsonValue)entry.getValue(), extraInfo));
            }
         } finally {
            extraInfo.popKey();
         }
      }

      if (this.unmodifiable) {
         map = this.unmodifiableMap(map);
      }

      return map;
   }

   @Nonnull
   public BsonValue encode(@Nonnull M map, ExtraInfo extraInfo) {
      BsonDocument document = new BsonDocument();

      for(Map.Entry<K, V> entry : map.entrySet()) {
         Codec<V> codecFor = this.getCodecFor(entry.getKey());
         document.put(this.getIdForKey(entry.getKey()), codecFor.encode(entry.getValue(), extraInfo));
      }

      this.encodeExtra(document, map, extraInfo);
      return document;
   }

   protected void encodeExtra(BsonDocument document, M map, ExtraInfo extraInfo) {
   }

   public M decodeJson(@Nonnull RawJsonReader reader, @Nonnull ExtraInfo extraInfo) throws IOException {
      reader.expect('{');
      reader.consumeWhiteSpace();
      if (reader.tryConsume('}')) {
         return (M)(this.unmodifiable ? this.emptyMap() : this.createMap());
      } else {
         M map = this.createMap();

         while(true) {
            String id = reader.readString();
            reader.consumeWhiteSpace();
            reader.expect(':');
            reader.consumeWhiteSpace();
            extraInfo.pushKey(id, reader);

            try {
               K key = (K)this.getKeyForId(id);
               if (key == null) {
                  this.handleUnknown(map, id, reader, extraInfo);
               } else {
                  Codec<V> codec = this.getCodecFor(key);
                  map.put(key, codec.decodeJson(reader, extraInfo));
               }
            } catch (Exception e) {
               throw new CodecException("Failed to decode", reader, extraInfo, e);
            } finally {
               extraInfo.popKey();
            }

            reader.consumeWhiteSpace();
            if (reader.tryConsumeOrExpect('}', ',')) {
               if (this.unmodifiable) {
                  map = this.unmodifiableMap(map);
               }

               return map;
            }

            reader.consumeWhiteSpace();
         }
      }
   }

   @Nonnull
   public Schema toSchema(@Nonnull SchemaContext context) {
      ObjectSchema obj = new ObjectSchema();
      obj.setAdditionalProperties(false);
      LinkedHashMap<String, Schema> props = (LinkedHashMap)this.codecProvider.keySet().stream().map((key) -> {
         Codec<V> codec = this.getCodecFor(key);
         return Map.entry(this.getIdForKey(key), codec.toSchema(context));
      }).sorted(Entry.comparingByKey()).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (a, b) -> a, LinkedHashMap::new));
      obj.setProperties(props);
      return obj;
   }

   public void validate(@Nonnull M map, ExtraInfo extraInfo) {
      for(Map.Entry<K, V> entry : map.entrySet()) {
         Codec<V> codec = this.getCodecFor(entry.getKey());
         if (codec instanceof ValidatableCodec) {
            ((ValidatableCodec)codec).validate(entry.getValue(), extraInfo);
         }
      }

   }

   public void validateDefaults(ExtraInfo extraInfo, @Nonnull Set<Codec<?>> tested) {
      if (tested.add(this)) {
         for(P value : this.codecProvider.values()) {
            Codec<V> codec = (Codec)this.mapper.apply(value);
            ValidatableCodec.validateDefaults(codec, extraInfo, tested);
         }

      }
   }

   private Codec<V> getCodecFor(K key) {
      return (Codec)this.mapper.apply(this.codecProvider.get(key));
   }

   protected abstract String getIdForKey(K var1);

   protected abstract K getKeyForId(String var1);

   protected abstract M emptyMap();

   protected abstract M unmodifiableMap(M var1);
}