// Copyright (C) 2014 Guibing Guo
//
// This file is part of LibRec.
//
// LibRec 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.
//
// LibRec 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 LibRec. If not, see <http://www.gnu.org/licenses/>.
//

package librec.data;

/**
 * An entry of a tensor.
 */
public interface TensorEntry {

	/**
	 * @return the index of dimension d
	 */
	int key(int d);

	/**
	 * @return entry keys
	 */
	int[] keys();

	/**
	 * @return the value at the current index
	 */
	double get();

	/**
	 * remove current entry
	 */
	void remove();

	/**
	 * Sets the value at the current index
	 */
	void set(double value);

}
