jscl.math.operator.vector.Divergence Maven / Gradle / Ivy

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package jscl.math.operator.vector;

import jscl.math.Generic;
import jscl.math.JsclVector;
import jscl.math.Variable;
import jscl.math.operator.Operator;
import jscl.math.operator.VectorOperator;
import jscl.mathml.MathML;

import javax.annotation.Nonnull;

public class Divergence extends VectorOperator {

	public static final String NAME = "diverg";

	public Divergence(Generic vector, Generic variable) {
		super(NAME, new Generic[]{vector, variable});
	}

	private Divergence(@Nonnull Generic parameter[]) {
		super(NAME, parameter);
	}

	@Override
	public int getMinParameters() {
		return 2;
	}

	public Generic selfExpand() {
		Variable variable[] = toVariables((JsclVector) parameters[1]);
		if (parameters[0] instanceof JsclVector) {
			JsclVector vector = (JsclVector) parameters[0];
			return vector.divergence(variable);
		}
		return expressionValue();
	}

	@Nonnull
	@Override
	public Operator newInstance(@Nonnull Generic[] parameters) {
		return new Divergence(parameters);
	}

	protected void bodyToMathML(MathML element) {
		operator(element, "nabla");
		parameters[0].toMathML(element, null);
	}

	@Nonnull
	public Variable newInstance() {
		return new Divergence(null, null);
	}
}