Java tutorial
/* * This file is part of Sponge, licensed under the MIT License (MIT). * * 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.spongepowered.common.data.property.store.item; import com.google.common.collect.ImmutableSet; import net.minecraft.block.Block; import net.minecraft.item.Item; import net.minecraft.item.ItemStack; import net.minecraft.item.ItemTool; import org.spongepowered.api.block.BlockType; import org.spongepowered.api.data.property.item.HarvestingProperty; import org.spongepowered.common.SpongeImpl; import org.spongepowered.common.data.property.store.common.AbstractItemStackPropertyStore; import java.util.Collection; import java.util.Optional; import java.util.Set; public class HarvestingPropertyStore extends AbstractItemStackPropertyStore<HarvestingProperty> { @SuppressWarnings("unchecked") @Override protected Optional<HarvestingProperty> getFor(ItemStack itemStack) { final Item item = itemStack.getItem(); if (item instanceof ItemTool) { final ImmutableSet<BlockType> blocks = ImmutableSet.copyOf((Set) ((ItemTool) item).effectiveBlocks); return Optional.of(new HarvestingProperty(blocks)); } else { final Collection<BlockType> blockTypes = SpongeImpl.getRegistry().getAllOf(BlockType.class); final ImmutableSet.Builder<BlockType> builder = ImmutableSet.builder(); blockTypes.stream().filter(blockType -> item.canHarvestBlock((Block) blockType)).forEach(builder::add); final ImmutableSet<BlockType> blocks = builder.build(); if (blocks.isEmpty()) { return Optional.empty(); } else { return Optional.of(new HarvestingProperty(blocks)); } } } }