/* */ public static String evaluate(
Object strArg, Object fromArg, Object toArg, Navigator nav)
/* */ throws FunctionCallException
/* */ {
/* 162 */ String inStr = StringFunction.evaluate(strArg, nav);
/* 163 */ String fromStr = StringFunction.evaluate(fromArg, nav);
/* 164 */ String toStr = StringFunction.evaluate(toArg, nav);
/* */
/* 167 */ Map characterMap = new HashMap();
/* 168 */ String[] fromCharacters = toUnicodeCharacters(fromStr);
/* 169 */ String[] toCharacters = toUnicodeCharacters(toStr);
/* 170 */ int fromLen = fromCharacters.length;
/* 171 */ int toLen = toCharacters.length;
/* 172 */ for (int i = 0; i < fromLen; i++) {
/* 173 */ String cFrom = fromCharacters[i];
/* 174 */ if (!characterMap.containsKey(cFrom))
/* */ {
/* 179 */ if (i < toLen)
/* */ {
/* 181 */ characterMap.put(cFrom, toCharacters[i]);
/* */ }
/* */ else
/* */ {
/* 185 */ characterMap.put(cFrom, null);
/* */ }
/* */ }
/* */ }
/* */
/* 190 */ StringBuffer outStr = new StringBuffer(inStr.length());
/* 191 */ String[] inCharacters = toUnicodeCharacters(inStr);
/* 192 */ int inLen = inCharacters.length;
/* 193 */ for (int i = 0; i < inLen; i++) {
/* 194 */ String cIn = inCharacters[i];
/* 195 */ if (characterMap.containsKey(cIn)) {
/* 196 */ String cTo = (String) characterMap.get(cIn);
/* 197 */ if (cTo != null) /* 198 */ outStr.append(cTo);
/* */ }
/* */ else
/* */ {
/* 202 */ outStr.append(cIn);
/* */ }
/* */ }
/* */
/* 206 */ return outStr.toString();
/* */ }
/**
* Returns a substring of an XPath string-value by character index.
*
* @param context the context at the point in the expression when the function is called
* @param args a list that contains two or three items
* @return a <code>String</code> containing the specifed character subsequence of the original
* string or the string-value of the context node
* @throws FunctionCallException if <code>args</code> has more than three or less than two items
*/
public Object call(Context context, List args) throws FunctionCallException {
final int argc = args.size();
if (argc < 2 || argc > 3) {
throw new FunctionCallException("substring() requires two or three arguments.");
}
final Navigator nav = context.getNavigator();
final String str = StringFunction.evaluate(args.get(0), nav);
// The spec doesn't really address this case
if (str == null) {
return "";
}
final int stringLength = (StringLengthFunction.evaluate(args.get(0), nav)).intValue();
if (stringLength == 0) {
return "";
}
Double d1 = NumberFunction.evaluate(args.get(1), nav);
if (d1.isNaN()) {
return "";
}
// Round the value and subtract 1 as Java strings are zero based
int start = RoundFunction.evaluate(d1, nav).intValue() - 1;
int substringLength = stringLength;
if (argc == 3) {
Double d2 = NumberFunction.evaluate(args.get(2), nav);
if (!d2.isNaN()) {
substringLength = RoundFunction.evaluate(d2, nav).intValue();
} else {
substringLength = 0;
}
}
if (substringLength < 0) return "";
int end = start + substringLength;
if (argc == 2) end = stringLength;
// negative start is treated as 0
if (start < 0) {
start = 0;
} else if (start > stringLength) {
return "";
}
if (end > stringLength) {
end = stringLength;
} else if (end < start) return "";
if (stringLength == str.length()) {
// easy case; no surrogate pairs
return str.substring(start, end);
} else {
return unicodeSubstring(str, start, end);
}
}