package org.akka.essentials.wc.mapreduce.example.server;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.StringTokenizer;
import akka.actor.ActorRef;
import akka.actor.UntypedActor;
public class MapActor extends UntypedActor {
String[] STOP_WORDS = { "a", "about", "above", "above", "across", "after",
"afterwards", "again", "against", "all", "almost", "alone",
"along", "already", "also", "although", "always", "am", "among",
"amongst", "amoungst", "amount", "an", "and", "another", "any",
"anyhow", "anyone", "anything", "anyway", "anywhere", "are",
"around", "as", "at", "back", "be", "became", "because", "become",
"becomes", "becoming", "been", "before", "beforehand", "behind",
"being", "below", "beside", "besides", "between", "beyond", "bill",
"both", "bottom", "but", "by", "call", "can", "cannot", "cant",
"co", "con", "could", "couldnt", "cry", "de", "describe", "detail",
"do", "done", "down", "due", "during", "each", "eg", "eight",
"either", "eleven", "else", "elsewhere", "empty", "enough", "etc",
"even", "ever", "every", "everyone", "everything", "everywhere",
"except", "few", "fifteen", "fify", "fill", "find", "fire",
"first", "five", "for", "former", "formerly", "forty", "found",
"four", "from", "front", "full", "further", "get", "give", "go",
"had", "has", "hasnt", "have", "he", "hence", "her", "here",
"hereafter", "hereby", "herein", "hereupon", "hers", "herself",
"him", "himself", "his", "how", "however", "hundred", "ie", "if",
"in", "inc", "indeed", "interest", "into", "is", "it", "its",
"itself", "keep", "last", "latter", "latterly", "least", "less",
"ltd", "made", "many", "may", "me", "meanwhile", "might", "mill",
"mine", "more", "moreover", "most", "mostly", "move", "much",
"must", "my", "myself", "name", "namely", "neither", "never",
"nevertheless", "next", "nine", "no", "nobody", "none", "noone",
"nor", "not", "nothing", "now", "nowhere", "of", "off", "often",
"on", "once", "one", "only", "onto", "or", "other", "others",
"otherwise", "our", "ours", "ourselves", "out", "over", "own",
"part", "per", "perhaps", "please", "put", "rather", "re", "same",
"see", "seem", "seemed", "seeming", "seems", "serious", "several",
"she", "should", "show", "side", "since", "sincere", "six",
"sixty", "so", "some", "somehow", "someone", "something",
"sometime", "sometimes", "somewhere", "still", "such", "system",
"take", "ten", "than", "that", "the", "their", "them",
"themselves", "then", "thence", "there", "thereafter", "thereby",
"therefore", "therein", "thereupon", "these", "they", "thickv",
"thin", "third", "this", "those", "though", "three", "through",
"throughout", "thru", "thus", "to", "together", "too", "top",
"toward", "towards", "twelve", "twenty", "two", "un", "under",
"until", "up", "upon", "us", "very", "via", "was", "we", "well",
"were", "what", "whatever", "when", "whence", "whenever", "where",
"whereafter", "whereas", "whereby", "wherein", "whereupon",
"wherever", "whether", "which", "while", "whither", "who",
"whoever", "whole", "whom", "whose", "why", "will", "with",
"within", "without", "would", "yet", "you", "your", "yours",
"yourself", "yourselves", "the" };
List<String> STOP_WORDS_LIST = Arrays.asList(STOP_WORDS);
private ActorRef actor = null;
public MapActor(ActorRef inReduceActor) {
actor = inReduceActor;
}
private List<Result> evaluateExpression(String line) {
List<Result> list = new ArrayList<Result>();
StringTokenizer parser = new StringTokenizer(line);
while (parser.hasMoreTokens()) {
String word = parser.nextToken().toLowerCase();
if (isAlpha(word) && !STOP_WORDS_LIST.contains(word)) {
list.add(new Result(word, 1));
}
}
return list;
}
private boolean isAlpha(String s) {
s = s.toUpperCase();
for (int i = 0; i < s.length(); i++) {
int c = (int) s.charAt(i);
if (c < 65 || c > 90)
return false;
}
return true;
}
// message handler
public void onReceive(Object message) {
if (message instanceof String) {
String work = (String) message;
// perform the work
List<Result> list = evaluateExpression(work);
// reply with the result
actor.tell(list);
} else
throw new IllegalArgumentException("Unknown message [" + message
+ "]");
}
}