private StringBuffer formatInternal(
Object arguments[],
StringBuffer appendBuf,
FieldPosition fp,
FormatCharacterIterator output_iterator) {
appendBuf.append(leader);
if (output_iterator != null) output_iterator.append(leader);
for (int i = 0; i < elements.length; ++i) {
Object thisArg = null;
boolean unavailable = false;
if (arguments == null || elements[i].argNumber >= arguments.length) unavailable = true;
else thisArg = arguments[elements[i].argNumber];
AttributedCharacterIterator iterator = null;
Format formatter = null;
if (fp != null && i == fp.getField() && fp.getFieldAttribute() == Field.ARGUMENT)
fp.setBeginIndex(appendBuf.length());
if (unavailable) appendBuf.append("{" + elements[i].argNumber + "}");
else {
if (elements[i].setFormat != null) formatter = elements[i].setFormat;
else if (elements[i].format != null) {
if (elements[i].formatClass != null && !elements[i].formatClass.isInstance(thisArg))
throw new IllegalArgumentException("Wrong format class");
formatter = elements[i].format;
} else if (thisArg instanceof Number) formatter = NumberFormat.getInstance(locale);
else if (thisArg instanceof Date)
formatter = DateFormat.getTimeInstance(DateFormat.DEFAULT, locale);
else appendBuf.append(thisArg);
}
if (fp != null && fp.getField() == i && fp.getFieldAttribute() == Field.ARGUMENT)
fp.setEndIndex(appendBuf.length());
if (formatter != null) {
// Special-case ChoiceFormat.
if (formatter instanceof ChoiceFormat) {
StringBuffer buf = new StringBuffer();
formatter.format(thisArg, buf, fp);
MessageFormat mf = new MessageFormat();
mf.setLocale(locale);
mf.applyPattern(buf.toString());
mf.format(arguments, appendBuf, fp);
} else {
if (output_iterator != null) iterator = formatter.formatToCharacterIterator(thisArg);
else formatter.format(thisArg, appendBuf, fp);
}
elements[i].format = formatter;
}
if (output_iterator != null) {
HashMap hash_argument = new HashMap();
int position = output_iterator.getEndIndex();
hash_argument.put(MessageFormat.Field.ARGUMENT, new Integer(elements[i].argNumber));
if (iterator != null) {
output_iterator.append(iterator);
output_iterator.addAttributes(hash_argument, position, output_iterator.getEndIndex());
} else output_iterator.append(thisArg.toString(), hash_argument);
output_iterator.append(elements[i].trailer);
}
appendBuf.append(elements[i].trailer);
}
return appendBuf;
}
