content: /*
   * SoulFire
   * Copyright (C) 2024  AlexProgrammerDE
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program.  If not, see <https://www.gnu.org/licenses/>.
   */
  package com.soulfiremc.server.util.structs;
  
  import java.util.Map;
  import java.util.WeakHashMap;
  import java.util.function.Function;
  
  /**
   * Make an object use shared memory.
   * Will try to free memory when the object is not used/already in memory.
   *
   * @param <T> The type of object to pool.
   */
  public final class ReferenceCache<T> {
    private final Map<T, T> cache = new WeakHashMap<>();
  
    public T poolReference(T obj) {
      synchronized (cache) {
        return cache.computeIfAbsent(obj, Function.identity());
      }
    }
  }
  