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A multidimensional, type-agnostic image processing library.
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/*
 * #%L
 * ImgLib2: a general-purpose, multidimensional image processing library.
 * %%
 * Copyright (C) 2009 - 2018 Tobias Pietzsch, Stephan Preibisch, Stephan Saalfeld,
 * John Bogovic, Albert Cardona, Barry DeZonia, Christian Dietz, Jan Funke,
 * Aivar Grislis, Jonathan Hale, Grant Harris, Stefan Helfrich, Mark Hiner,
 * Martin Horn, Steffen Jaensch, Lee Kamentsky, Larry Lindsey, Melissa Linkert,
 * Mark Longair, Brian Northan, Nick Perry, Curtis Rueden, Johannes Schindelin,
 * Jean-Yves Tinevez and Michael Zinsmaier.
 * %%
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * #L%
 */

package net.imglib2.img.sparse;

import net.imglib2.Cursor;
import net.imglib2.img.sparse.NtreeImg.PositionProvider;
import net.imglib2.iterator.LocalizingIntervalIterator;
import net.imglib2.type.NativeType;

/**
 * @author Tobias Pietzsch
 * 
 */
public final class NtreeCursor< T extends NativeType< T >> extends
		LocalizingIntervalIterator implements Cursor< T >, PositionProvider
{
	private final NtreeImg< T, ? > img;

	private final T type;

	public NtreeCursor( final NtreeImg< T, ? > img )
	{
		super( img );

		this.img = img;
		this.type = img.createLinkedType();

		for ( int d = 0; d < n; d++ )
			position[ d ] = 0;

		position[ 0 ]--;
		type.updateContainer( this );
	}

	private NtreeCursor( final NtreeCursor< T > cursor )
	{
		super( cursor );

		this.img = cursor.img;
		this.type = img.createLinkedType();

		for ( int d = 0; d < n; d++ )
			position[ d ] = cursor.position[ d ];

		type.updateContainer( this );
	}

	@Override
	public T get()
	{
		return type;
	}

	@Override
	public T next()
	{
		fwd();
		return get();
	}

	@Override
	public void remove()
	{}

	@Override
	public NtreeCursor< T > copy()
	{
		return new NtreeCursor<>( this );
	}

	@Override
	public NtreeCursor< T > copyCursor()
	{
		return copy();
	}

	@Override
	public long[] getPosition()
	{
		return position;
	}
}