/* 
GeoGebra - Dynamic Mathematics for Everyone
http://www.geogebra.org

This file is part of GeoGebra.

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.

 */

package org.geogebra.common.kernel.arithmetic;

import org.geogebra.common.kernel.Kernel;
import org.geogebra.common.kernel.StringTemplate;

/**
 * Interface for GeoFunction and GeoFunctionNVar
 * 
 * @author Markus
 *
 */
public interface FunctionalNVar extends Evaluate2Var {
	/**
	 * @param vals
	 *            values of variables
	 * @return value at vals
	 */
	public double evaluate(double[] vals);

	/**
	 * @return function
	 */
	@Override
	public FunctionNVar getFunction();

	/**
	 * @return list of inequalities
	 */
	public IneqTree getIneqs();

	/**
	 * Returns true iff the function is boolean
	 * 
	 * @return true iff the function is boolean
	 */
	public boolean isBooleanFunction();

	// public GeoFunctionNVar getGeoDerivative(int order, int nvar);
	/**
	 * @param tpl
	 *            string template
	 * @return comma separated variable names
	 */
	@Override
	public String getVarString(StringTemplate tpl);

	/**
	 * @return function expression
	 */
	@Override
	public ExpressionNode getFunctionExpression();

	/**
	 * @return whether this function is defined or not
	 */
	@Override
	public boolean isDefined();

	/**
	 * @param label
	 *            new label
	 */
	public void setLabel(String label);

	/**
	 * @return function variables
	 */
	public FunctionVariable[] getFunctionVariables();

	/**
	 * @return kernel
	 */
	public Kernel getKernel();

	/**
	 * For GeoElements sets the usual defined flag, also works for
	 * ValidExpressions
	 * 
	 * @param b
	 *            whether this is defined
	 */
	public void setDefined(boolean b);

}