/*
* 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.regions.iterator;
import com.sk89q.worldedit.BlockVector;
import com.sk89q.worldedit.Vector2D;
import com.sk89q.worldedit.regions.FlatRegion;
import java.util.Iterator;
import java.util.NoSuchElementException;
import static com.google.common.base.Preconditions.checkNotNull;
public class FlatRegion3DIterator implements Iterator<BlockVector> {
private Iterator<Vector2D> flatIterator;
private int minY;
private int maxY;
private Vector2D next2D;
private int nextY;
public FlatRegion3DIterator(FlatRegion region, Iterator<Vector2D> flatIterator) {
checkNotNull(region);
checkNotNull(flatIterator);
this.flatIterator = flatIterator;
this.minY = region.getMinimumY();
this.maxY = region.getMaximumY();
if (flatIterator.hasNext()) {
this.next2D = flatIterator.next();
} else {
this.next2D = null;
}
this.nextY = minY;
}
public FlatRegion3DIterator(FlatRegion region) {
this(region, region.asFlatRegion().iterator());
}
@Override
public boolean hasNext() {
return next2D != null;
}
@Override
public BlockVector next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
BlockVector current = new BlockVector(next2D.getBlockX(), nextY, next2D.getBlockZ());
if (nextY < maxY) {
nextY++;
} else if (flatIterator.hasNext()) {
next2D = flatIterator.next();
nextY = minY;
} else {
next2D = null;
}
return current;
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
}