co.easimart.Numbers Maven / Gradle / Ivy
package co.easimart;
/**
* Static utility methods pertaining to {@link Number} instances.
*/
/** package */ class Numbers {
/**
* Add two {@link Number} instances.
*/
/* package */ static Number add(Number first, Number second) {
if (first instanceof Double || second instanceof Double) {
return first.doubleValue() + second.doubleValue();
} else if (first instanceof Float || second instanceof Float) {
return first.floatValue() + second.floatValue();
} else if (first instanceof Long || second instanceof Long) {
return first.longValue() + second.longValue();
} else if (first instanceof Integer || second instanceof Integer) {
return first.intValue() + second.intValue();
} else if (first instanceof Short || second instanceof Short) {
return first.shortValue() + second.shortValue();
} else if (first instanceof Byte || second instanceof Byte) {
return first.byteValue() + second.byteValue();
} else {
throw new RuntimeException("Unknown number type.");
}
}
/**
* Subtract two {@link Number} instances.
*/
/* package */ static Number subtract(Number first, Number second) {
if (first instanceof Double || second instanceof Double) {
return first.doubleValue() - second.doubleValue();
} else if (first instanceof Float || second instanceof Float) {
return first.floatValue() - second.floatValue();
} else if (first instanceof Long || second instanceof Long) {
return first.longValue() - second.longValue();
} else if (first instanceof Integer || second instanceof Integer) {
return first.intValue() - second.intValue();
} else if (first instanceof Short || second instanceof Short) {
return first.shortValue() - second.shortValue();
} else if (first instanceof Byte || second instanceof Byte) {
return first.byteValue() - second.byteValue();
} else {
throw new RuntimeException("Unknown number type.");
}
}
/**
* Compare two {@link Number} instances.
*/
/* package */ static int compare(Number first, Number second) {
if (first instanceof Double || second instanceof Double) {
return (int) Math.signum(first.doubleValue() - second.doubleValue());
} else if (first instanceof Float || second instanceof Float) {
return (int) Math.signum(first.floatValue() - second.floatValue());
} else if (first instanceof Long || second instanceof Long) {
long diff = first.longValue() - second.longValue();
return (diff < 0) ? -1 : ((diff > 0) ? 1 : 0);
} else if (first instanceof Integer || second instanceof Integer) {
return first.intValue() - second.intValue();
} else if (first instanceof Short || second instanceof Short) {
return first.shortValue() - second.shortValue();
} else if (first instanceof Byte || second instanceof Byte) {
return first.byteValue() - second.byteValue();
} else {
throw new RuntimeException("Unknown number type.");
}
}
}