Clamp BigInteger into a long

Question

Is there a way to convert a Java BigInteger into a long , clamping it to the range of long ? I mean, if it's larger than Long.MAX_VALUE or smaller than Long.MIN_VALUE , use these edge values, otherwise use the exact value.

Answer 1

I ended up using this custom function:

public static long clampToLong(BigInteger val) {
    if (val.bitLength() <= 63) {
        return val.longValue();
    }
    return val.signum() == 1 ? Long.MAX_VALUE : Long.MIN_VALUE;
}