/*
* This file is part of LanternServer, licensed under the MIT License (MIT).
*
* Copyright (c) LanternPowered <https://www.lanternpowered.org>
* Copyright (c) SpongePowered <https://www.spongepowered.org>
* Copyright (c) contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the Software), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.lanternpowered.server.data.io.store;
import static com.google.common.base.Preconditions.checkNotNull;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.github.benmanes.caffeine.cache.LoadingCache;
import org.lanternpowered.server.block.tile.LanternTileEntity;
import org.lanternpowered.server.data.io.store.entity.EntitySerializer;
import org.lanternpowered.server.data.io.store.item.ItemStackStore;
import org.lanternpowered.server.data.io.store.tile.TileEntitySerializer;
import org.lanternpowered.server.entity.LanternEntity;
import org.lanternpowered.server.inventory.LanternItemStack;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
public final class ObjectSerializerRegistry {
private static final ObjectSerializerRegistry registry = new ObjectSerializerRegistry();
public static ObjectSerializerRegistry get() {
return registry;
}
private final Map<Class<?>, ObjectSerializer> objectSerializers = new HashMap<>();
private final LoadingCache<Class<?>, Optional<ObjectSerializer>> objectSerializerCache =
Caffeine.newBuilder().build(this::findSerializer);
private Optional<ObjectSerializer> findSerializer(Class<?> key) {
ObjectSerializer store;
while (key != Object.class && key != null) {
store = this.objectSerializers.get(key);
if (store != null) {
return Optional.of(store);
}
for (Class<?> interf : key.getInterfaces()) {
store = this.objectSerializers.get(interf);
if (store != null) {
return Optional.of(store);
}
}
key = key.getSuperclass();
}
return Optional.empty();
}
public ObjectSerializerRegistry() {
this.register(LanternItemStack.class, new ItemStackStore());
this.register(LanternEntity.class, new EntitySerializer());
this.register(LanternTileEntity.class, new TileEntitySerializer());
}
/**
* Register a {@link ObjectSerializer} for the specified object type.
*
* @param objectType The object type
* @param objectSerializer The object serializer
* @param <T> The type of the object
*/
public <T> void register(Class<? extends T> objectType, ObjectSerializer<T> objectSerializer) {
this.objectSerializers.put(checkNotNull(objectType, "objectType"), checkNotNull(objectSerializer, "objectSerializer"));
this.objectSerializerCache.invalidateAll();
}
/**
* Gets the most suitable {@link ObjectSerializer} for the specified object type,
* may return {@link Optional#empty()} if no suitable store could be found.
*
* @param objectType The object type
* @param <T> The type of the object
* @return The object serializer
*/
@SuppressWarnings("unchecked")
public <T> Optional<ObjectSerializer<T>> get(Class<? extends T> objectType) {
return (Optional) this.objectSerializerCache.get(objectType);
}
}