@Override
public void processElement(ProcessContext c) {
if (c.element().trim().isEmpty()) {
emptyLines.addValue(1L);
}
// Split the line into words.
String[] words = c.element().split("[^a-zA-Z']+");
// Output each word encountered into the output PCollection.
for (String word : words) {
if (!word.isEmpty()) {
c.output(word);
}
}
}
