Created
November 30, 2012 18:54
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import java.io.File; | |
import java.util.regex.Pattern; | |
import java.util.Scanner; | |
import com.google.common.collect.ArrayListMultimap; | |
/** create in-memory mappings from words to the files that contain them */ | |
public class Indexer { | |
public static ArrayListMultimap<String,String> buildIndex(String dirName) throws java.io.IOException { | |
ArrayListMultimap<String,String> map = ArrayListMultimap.create(); | |
for (File f : new File(dirName).listFiles()) { | |
Scanner s = new Scanner(f).useDelimiter("\\W"); | |
while (s.hasNext()) { | |
map.put(s.next().toLowerCase(), f.getName()); | |
} | |
} | |
return map; | |
} | |
//for testing | |
public static void main(String args[]) throws java.io.IOException { | |
ArrayListMultimap<String,String> index = Indexer.buildIndex(args[0]); | |
System.out.println(index.get(args[1])); | |
} | |
} |
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