/**
 * Stelt een oplossing voor van het ordeningsalgoritme.
 */
public class MatrixMultiplication {
    private final Matrix matrix;
    private final MatrixMultiplication left;
    private final MatrixMultiplication right;

    public MatrixMultiplication(Matrix matrix) {
        this.matrix = matrix;
        left = right = null;
    }

    public MatrixMultiplication(MatrixMultiplication left, MatrixMultiplication right) {
        matrix = null;
        this.left = left;
        this.right = right;
    }

    Matrix getMatrix() {
        return matrix;
    }

    MatrixMultiplication getLeft() {
        return left;
    }

    MatrixMultiplication getRight() {
        return right;
    }

    @Override
    public String toString() {
        return toString(false);
    }

    private String toString(boolean haakjes) {
        if (matrix != null) return String.valueOf(matrix.name());
        String s = left.toString(true) + right.toString(true);
        return haakjes ? "(" + s + ")" : s;
    }
}