Java 类net.minecraft.world.storage.loot.functions.SetMetadata 实例源码

/**
 * Converts a LootTable to a list of possible drops, only looks for Item and metadata.
 * @param table the loot table to get items from
 * @return a LinkedList of the stacks in the loot table
 */
public static List<ItemStack> tableToItemStacks(LootTable table){
    List<ItemStack> stacks = new LinkedList<>();
    for(LootPool p:getPools(table)){
        for(LootEntry entry:getEntries(p)){
            if(entry instanceof LootEntryItem){
                LootEntryItem ei = (LootEntryItem)entry;
                Item item = getItem(ei);
                LootFunction[] functs = getFunctions(ei);
                boolean metaSet = false;
                for(LootFunction func:functs){
                    if(func instanceof SetMetadata){
                        metaSet=true;
                        RandomValueRange range = (RandomValueRange)ReflectionHelper.getPrivateValue(SetMetadata.class, (SetMetadata)func, "metaRange","field_186573_b");
                        int meta = MathHelper.floor(range.getMin());
                        stacks.add(new ItemStack(item,1,meta));
                    }
                }
                if(!metaSet)stacks.add(new ItemStack(item));
            }
            /* won't bother with this case for now
            else if(entry instanceof LootEntryTable){
                //restart with that table
                ResourceLocation location = (ResourceLocation) ReflectionHelper.getPrivateValue(LootEntryTable.class, (LootEntryTable)entry, "table","field_186371_a");
            }
            */
        }
    }
    return stacks;
}

public static SetMetadata createSetMetadata(int meta)
   {
return new SetMetadata(NO_CONDITIONS, new RandomValueRange(meta));
   }

private @Nonnull SetMetadata setMetadata(int metaMin, int metaMax) {
  return new SetMetadata(NO_CONDITIONS, new RandomValueRange(metaMin, metaMax));
}

private @Nonnull SetMetadata setMetadata(int meta) {
  return new SetMetadata(NO_CONDITIONS, new RandomValueRange(meta));
}

/**
 * Creates a new loot entry that will be added to the loot pools when a world is loaded.
 *
 * @param location The loot table to add the loot to. You can use
 *        {@link net.minecraft.world.storage.loot.LootTableList} for convenience.
 * @param name The name of the entry being added. This will be prefixed with {@link #modid}
 *        .
 * @param pool The name of the pool to add the entry to. This pool must already exist.
 * @param weight The weight of the entry.
 * @param item The item to add.
 * @param meta The metadata for the loot.
 * @return A builder object. It can be used to fine tune the loot entry.
 */
public LootBuilder addLoot (ResourceLocation location, String name, String pool, int weight, Item item, int meta) {

    final LootBuilder loot = this.addLoot(location, name, pool, weight, item);
    loot.addFunction(new SetMetadata(new LootCondition[0], new RandomValueRange(meta, meta)));
    return loot;
}