/** Evaluate in a context where a string is wanted */
public CharSequence evaluateAsString(XPathContext context) throws XPathException {
int numArgs = argument.length;
Controller ctrl = context.getController();
DecimalSymbols dfs = decimalFormatSymbols;
AtomicValue av0 = (AtomicValue) argument[0].evaluateItem(context);
if (av0 == null) {
av0 = DoubleValue.NaN;
}
NumericValue number = (NumericValue) av0;
if (dfs == null) {
// the decimal-format name was not resolved statically
if (requireFixup) {
// we registered for a fixup, but none came
dynamicError("Unknown decimal format name", "XTDE1280", context);
return null;
}
DecimalFormatManager dfm = ctrl.getExecutable().getDecimalFormatManager();
if (numArgs == 2) {
dfs = dfm.getDefaultDecimalFormat();
} else {
// the decimal-format name was given as a run-time expression
String lexicalName = argument[2].evaluateItem(context).getStringValue();
StructuredQName qName = null;
try {
qName =
StructuredQName.fromLexicalQName(
lexicalName, false, context.getConfiguration().getNameChecker(), nsContext);
} catch (XPathException e) {
dynamicError("Invalid decimal format name. " + e.getMessage(), "XTDE1280", context);
}
dfs = dfm.getNamedDecimalFormat(qName);
if (dfs == null) {
dynamicError(
"format-number function: decimal-format '" + lexicalName + "' is not defined",
"XTDE1280",
context);
return null;
}
}
}
SubPicture[] pics = subPictures;
if (pics == null) {
String format = argument[1].evaluateItem(context).getStringValue();
pics = getSubPictures(format, dfs);
}
return formatNumber(number, pics, dfs).toString();
}
