Salomão
94 lines
2.8 KiB
Java
94 lines
2.8 KiB
Java
/*
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* This file is part of Applied Energistics 2.
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* Copyright (c) 2013 - 2014, AlgorithmX2, All rights reserved.
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*
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* Applied Energistics 2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Applied Energistics 2 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Applied Energistics 2. If not, see <http://www.gnu.org/licenses/lgpl>.
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*/
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package appeng.util.item;
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import java.util.Objects;
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import com.google.common.base.Preconditions;
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import net.minecraft.item.Item;
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import net.minecraft.item.ItemStack;
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final class AESharedItemStack {
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private final ItemStack itemStack;
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private final int itemId;
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private final int itemDamage;
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private final int hashCode;
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public AESharedItemStack(final ItemStack itemStack) {
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this(itemStack, itemStack.getItemDamage());
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}
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/**
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* A constructor to explicitly set the damage value and not fetch it from the {@link ItemStack}
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*
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* @param itemStack The {@link ItemStack} to filter
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* @param damage The damage of the item
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*/
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private AESharedItemStack(ItemStack itemStack, int damage) {
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this.itemStack = itemStack;
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this.itemId = Item.getIdFromItem(itemStack.getItem());
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this.itemDamage = damage;
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// Ensure this is always called last.
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this.hashCode = this.makeHashCode();
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}
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ItemStack getDefinition() {
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return this.itemStack;
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}
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int getItemDamage() {
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return this.itemDamage;
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}
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@Override
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public int hashCode() {
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return this.hashCode;
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}
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@Override
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public boolean equals(final Object obj) {
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if (this == obj) {
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return true;
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}
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if (!(obj instanceof AESharedItemStack)) {
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return false;
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}
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final AESharedItemStack other = (AESharedItemStack) obj;
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Preconditions.checkState(this.itemStack.getCount() == 1, "ItemStack#getCount() has to be 1");
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Preconditions.checkArgument(other.getDefinition().getCount() == 1, "ItemStack#getCount() has to be 1");
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if (this.itemStack == other.itemStack) {
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return true;
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}
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return ItemStack.areItemStacksEqual(this.itemStack, other.itemStack);
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}
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private int makeHashCode() {
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return Objects.hash(
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this.itemId,
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this.itemDamage,
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this.itemStack.hasTagCompound() ? this.itemStack.getTagCompound() : 0);
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}
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}
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