Salomão
64 lines
2.2 KiB
Java
64 lines
2.2 KiB
Java
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017 AlgorithmX2
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package appeng.util.item;
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import java.lang.ref.WeakReference;
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import java.util.WeakHashMap;
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import javax.annotation.Nonnull;
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import net.minecraft.item.ItemStack;
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public final class AEItemStackRegistry {
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private static final WeakHashMap<AESharedItemStack, WeakReference<AESharedItemStack>> REGISTRY = new WeakHashMap<>();
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private AEItemStackRegistry() {
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}
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static synchronized AESharedItemStack getRegisteredStack(final @Nonnull ItemStack itemStack) {
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if (itemStack.isEmpty()) {
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throw new IllegalArgumentException("stack cannot be empty");
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}
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int oldStackSize = itemStack.getCount();
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itemStack.setCount(1);
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AESharedItemStack search = new AESharedItemStack(itemStack);
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WeakReference<AESharedItemStack> weak = REGISTRY.get(search);
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AESharedItemStack ret = null;
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if (weak != null) {
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ret = weak.get();
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}
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if (ret == null) {
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ret = new AESharedItemStack(itemStack.copy());
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REGISTRY.put(ret, new WeakReference<>(ret));
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}
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itemStack.setCount(oldStackSize);
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return ret;
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}
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}
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