@NotNull
Polynomial derivative() {
@NotNull Polynomial deriv = new Polynomial(z_value, variableCode, oldvariablecode, consts);
deriv.setSigns(this.signs);
for (int i = 0; i < terms.size(); i++) {
deriv.terms.add(terms.get(i).derivative());
}
return deriv;
}
@Override
protected String derivativeBase(int order) {
if (order < 0) {
throw new IllegalArgumentException(UNSUPPORTED_DERIVATIVE_ORDER_MESSAGE);
}
Polynomial derived = this;
for (int i = 0; i < order; ++i) {
derived = derived.derivative();
}
return derived.toString();
}
Polynomial fromString(String polynomial, boolean deepEvaluate) {
if (deepEvaluate) {
String[] divisors = StringManipulator.split(polynomial, ",/,");
Polynomial[] dividing = new Polynomial[divisors.length];
for (int i = 0; i < divisors.length; ++i) {
String[] multipliers = StringManipulator.split(divisors[i], ",*,");
Polynomial[] multiplying = new Polynomial[multipliers.length];
for (int j = 0; j < multipliers.length; ++j) {
multiplying[j] =
new Polynomial(null, variableCode, oldvariablecode, consts)
.fromString(multipliers[j], variableCode, oldvariablecode, consts, false);
}
Polynomial multiplied = multiplying[0];
for (int j = 1; j < multiplying.length; ++j) {
multiplied.multiply(multiplying[j]);
}
dividing[i] = multiplied;
}
Polynomial divided = dividing[0];
for (int i = 1; i < dividing.length; ++i) {
divided.divide(dividing[i]);
}
init(divided);
return this;
}
@NotNull String[] tokens = split(polynomial, ",");
terms.ensureCapacity(tokens.length);
signs.ensureCapacity(tokens.length + 1);
for (@NotNull String token : tokens) {
if (token.equals("+") || token.equals("-")) {
signs.add(token.trim());
} else {
terms.add(new Term(variableCode, oldvariablecode, consts).fromString(token.trim()));
}
}
if (signs.size() == terms.size() - 1) {
signs.add(0, "+");
}
return this;
}