/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.extent.validation;
import com.sk89q.worldedit.MaxChangedBlocksException;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.WorldEditException;
import com.sk89q.worldedit.blocks.BaseBlock;
import com.sk89q.worldedit.extent.AbstractDelegateExtent;
import com.sk89q.worldedit.extent.Extent;
import static com.google.common.base.Preconditions.checkArgument;
/**
* Limits the number of blocks that can be changed before a
* {@link MaxChangedBlocksException} is thrown.
*/
public class BlockChangeLimiter extends AbstractDelegateExtent {
private int limit;
private int count = 0;
/**
* Create a new instance.
*
* @param extent the extent
* @param limit the limit (>= 0) or -1 for no limit
*/
public BlockChangeLimiter(Extent extent, int limit) {
super(extent);
setLimit(limit);
}
/**
* Get the limit.
*
* @return the limit (>= 0) or -1 for no limit
*/
public int getLimit() {
return limit;
}
/**
* Set the limit.
*
* @param limit the limit (>= 0) or -1 for no limit
*/
public void setLimit(int limit) {
checkArgument(limit >= -1, "limit >= -1 required");
this.limit = limit;
}
/**
* Get the number of blocks that have been counted so far.
*
* @return the number of blocks
*/
public int getCount() {
return count;
}
@Override
public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
if (limit >= 0) {
if (count >= limit) {
throw new MaxChangedBlocksException(limit);
}
count++;
}
return super.setBlock(location, block);
}
}