/**
* Produce a Number which represents the given value {@code x} according to the primitive type of
* the given wrapper {@code wrap}. Caller must invoke intValue, byteValue, longValue (etc.) on the
* result to retrieve the desired primitive value.
*/
public static Number primitiveConversion(Wrapper wrap, Object x, boolean cast) {
// Maybe merge this code with Wrapper.convert/cast.
Number res;
if (x == null) {
if (!cast) return null;
return ZERO_INT;
}
if (x instanceof Number) {
res = (Number) x;
} else if (x instanceof Boolean) {
res = ((boolean) x ? ONE_INT : ZERO_INT);
} else if (x instanceof Character) {
res = (int) (char) x;
} else {
// this will fail with the required ClassCastException:
res = (Number) x;
}
Wrapper xwrap = Wrapper.findWrapperType(x.getClass());
if (xwrap == null || !cast && !wrap.isConvertibleFrom(xwrap))
// this will fail with the required ClassCastException:
return (Number) wrap.wrapperType().cast(x);
return res;
}
