// $Id$
/*
 * WorldEdit
 * Copyright (C) 2010 sk89q <http://www.sk89q.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

package com.sk89q.worldedit.data;

import java.io.*;
import com.sk89q.worldedit.*;
import org.jnbt.*;

/**
 * Represents chunk storage mechanisms.
 *
 * @author sk89q
 */
public abstract class ChunkStore {
    /**
     * Convert a position to a chunk.
     * 
     * @param pos
     * @return
     * @throws ChunkStoreException
     * @throws IOException
     */
    public static BlockVector2D toChunk(Vector pos) {
        int chunkX = (int)Math.floor(pos.getBlockX() / 16.0);
        int chunkZ = (int)Math.floor(pos.getBlockZ() / 16.0);

        return new BlockVector2D(chunkX, chunkZ);
    }

    /**
     * Get the tag for a chunk.
     *
     * @param pos
     * @return tag
     * @throws DataException
     * @throws IOException
     */
    public abstract CompoundTag getChunkTag(Vector2D pos)
            throws DataException, IOException;

    /**
     * Get a chunk at a location.
     *
     * @param x
     * @param z
     * @return
     * @throws ChunkStoreException
     * @throws IOException
     * @throws DataException
     */
    public Chunk getChunk(Vector2D pos)
            throws DataException, IOException {
        return new Chunk(getChunkTag(pos));
    }

    /**
     * Close resources.
     *
     * @throws IOException
     */
    public void close() throws IOException {

    }
}