@@ -0,0 +1,2148 @@
+/*%0A * This file is part of Sponge, licensed under the MIT License (MIT).%0A *%0A * Copyright (c) SpongePowered %3Chttps://www.spongepowered.org%3E%0A * Copyright (c) contributors%0A *%0A * Permission is hereby granted, free of charge, to any person obtaining a copy%0A * of this software and associated documentation files (the %22Software%22), to deal%0A * in the Software without restriction, including without limitation the rights%0A * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell%0A * copies of the Software, and to permit persons to whom the Software is%0A * furnished to do so, subject to the following conditions:%0A *%0A * The above copyright notice and this permission notice shall be included in%0A * all copies or substantial portions of the Software.%0A *%0A * THE SOFTWARE IS PROVIDED %22AS IS%22, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR%0A * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,%0A * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE%0A * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER%0A * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,%0A * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN%0A * THE SOFTWARE.%0A */%0Apackage org.spongepowered.common.util;%0A%0A%0Aimport java.util.Objects;%0Aimport java.util.function.Supplier;%0A%0Apublic class MemoizedSupplier%3CT%3E implements Supplier%3CT%3E %7B%0A%0A    public static %3CV%3E Supplier%3CV%3E memoize(final Supplier%3CV%3E supplier) %7B%0A        return new MemoizedSupplier%3C%3E(supplier);%0A    %7D%0A%0A    final Supplier%3CT%3E delegate;%0A    transient volatile boolean initialized;%0A    transient T value;%0A%0A    private MemoizedSupplier(final Supplier%3CT%3E delegate) %7B%0A        this.delegate = Objects.requireNonNull(delegate);%0A    %7D%0A%0A    @Override%0A    public T get() %7B%0A        if (!this.initialized) %7B%0A            synchronized (this) %7B%0A                if (!this.initialized) %7B%0A                    final T t = this.delegate.get();%0A                    this.value = t;%0A                    this.initialized = true;%0A                    return t;%0A                %7D%0A            %7D%0A        %7D%0A        return this.value;%0A    %7D%0A%0A%7D%0A

Introduce MemoizedSupplier for Supplier memoization