/**
* If value represents Uint32 index, make it available through ScriptRuntime.lastUint32Result(cx)
* and return null. Otherwise return the same value as toXMLName(cx, value).
*/
XMLName toXMLNameOrIndex(Context cx, Object value) {
XMLName result;
if (value instanceof XMLName) {
result = (XMLName) value;
} else if (value instanceof String) {
String str = (String) value;
long test = ScriptRuntime.testUint32String(str);
if (test >= 0) {
ScriptRuntime.storeUint32Result(cx, test);
result = null;
} else {
result = toXMLNameFromString(cx, str);
}
} else if (value instanceof Number) {
double d = ((Number) value).doubleValue();
long l = (long) d;
if (l == d && 0 <= l && l <= 0xFFFFFFFFL) {
ScriptRuntime.storeUint32Result(cx, l);
result = null;
} else {
throw badXMLName(value);
}
} else if (value instanceof QName) {
QName qname = (QName) value;
String uri = qname.uri();
boolean number = false;
result = null;
if (uri != null && uri.length() == 0) {
// Only in this case qname.toString() can resemble uint32
long test = ScriptRuntime.testUint32String(uri);
if (test >= 0) {
ScriptRuntime.storeUint32Result(cx, test);
number = true;
}
}
if (!number) {
result = XMLName.formProperty(uri, qname.localName());
}
} else if (value instanceof Boolean || value == Undefined.instance || value == null) {
throw badXMLName(value);
} else {
String str = ScriptRuntime.toString(value);
long test = ScriptRuntime.testUint32String(str);
if (test >= 0) {
ScriptRuntime.storeUint32Result(cx, test);
result = null;
} else {
result = toXMLNameFromString(cx, str);
}
}
return result;
}
@Override
boolean propertyIsEnumerable(Object name) {
long index;
if (name instanceof Integer) {
index = ((Integer) name).intValue();
} else if (name instanceof Number) {
double x = ((Number) name).doubleValue();
index = (long) x;
if (index != x) {
return false;
}
if (index == 0 && 1.0 / x < 0) {
// Negative 0
return false;
}
} else {
String s = ScriptRuntime.toString(name);
index = ScriptRuntime.testUint32String(s);
}
return (0 <= index && index < length());
}