FillListener.java 文件源码

/**
 * Return a predicate that applies a Filter to the given InventoryHolder,
 * or null if the InventoryHolder is not something that we should be filling.
 */
private static @Nullable Predicate<Filter> passesFilter(InventoryHolder holder) {
    if(holder instanceof DoubleChest) {
        final DoubleChest doubleChest = (DoubleChest) holder;
        return filter -> !filter.denies((Chest) doubleChest.getLeftSide()) ||
                         !filter.denies((Chest) doubleChest.getRightSide());
    } else if(holder instanceof BlockState) {
        return filter -> !filter.denies((BlockState) holder);
    } else if(holder instanceof Player) {
        // This happens with crafting inventories, and possibly other transient inventory types
        // Pretty sure we never want to fill an inventory held by the player
        return null;
    } else if(holder instanceof Entity) {
        return filter -> !filter.denies(new EntityQuery((Entity) holder));
    } else {
        // If we're not sure what it is, don't fill it
        return null;
    }
}