/** org.apache.spark.examples.WordsMapFunction User: Steve Date: 8/25/2014 */
public class WordsMapFunction extends AbstractLoggingFlatMapFunction<String, String> {
private static final Pattern SPACE = Pattern.compile(" ");
public Iterable<String> doCall(String s) {
// keep count of letters
getAccumulators().incrementAccumulator("TotalLetters", s.length());
String[] split = SPACE.split(s);
List<String> ret = new ArrayList<String>();
for (int i = 0; i < split.length; i++) {
String sx = regularizeString(split[i]);
if (sx.length() > 0) ret.add(sx);
}
return ret;
}
public static String dropNonLetters(String s) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (Character.isLetter(c)) sb.append(c);
}
return sb.toString();
}
public static String regularizeString(String inp) {
inp = inp.trim();
inp = inp.toUpperCase();
return dropNonLetters(inp);
}
}
public Iterable<String> doCall(String s) {
// keep count of letters
getAccumulators().incrementAccumulator("TotalLetters", s.length());
String[] split = SPACE.split(s);
List<String> ret = new ArrayList<String>();
for (int i = 0; i < split.length; i++) {
String sx = regularizeString(split[i]);
if (sx.length() > 0) ret.add(sx);
}
return ret;
}