Method sortString

test/org/apache/pig/test/utils/TestHelper.java:410–426

Find out the string which matches "regex" from "target", and sort the string with spacial order. The string elements are split by "split".

(String regex, String target, String split)

     * order. The string elements are split by "split".
     */
    public static String sortString(String regex, String target, String split) {
        Pattern p = Pattern.compile(regex);
        Matcher matcher = p.matcher(target);
        String original = null;
        String replaceString = new String();

        if (matcher.find()) {
            original = matcher.group(1);
            String[] out = original.split(split);
            Collections.sort(Arrays.asList(out));
            for (int j = 0; j < out.length; j++) {
                replaceString += (j > 0 ? ", " + out[j] : out[j]);
            }
            return target.replace(original, replaceString);
        }
        return target;
    }

    /**
     * Sort UDFs for golden plan