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| package wordcount; | |
| import java.io.IOException; | |
| import java.util.StringTokenizer; | |
| import org.apache.hadoop.fs.Path; | |
| import org.apache.hadoop.mapreduce.Job; | |
| import org.apache.hadoop.mapreduce.Mapper; | |
| import org.apache.hadoop.mapreduce.Reducer; | |
| import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; | |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; | |
| import org.apache.hadoop.util.GenericOptionsParser; | |
| import java.util.*; | |
| import org.apache.hadoop.conf.*; | |
| import org.apache.hadoop.io.*; | |
| import org.apache.hadoop.mapred.*; | |
| import org.apache.hadoop.util.*; | |
| public class fourB { | |
| public static class TokenizerMapper | |
| extends Mapper<Object, Text, Text, IntWritable>{ | |
| private final static IntWritable zero = new IntWritable(0); | |
| private final static IntWritable one = new IntWritable(1); | |
| public void map(Object key, Text value, Context context | |
| ) throws IOException, InterruptedException { | |
| Text k = new Text (); | |
| StringTokenizer itr = new StringTokenizer(value.toString()); | |
| while (itr.hasMoreTokens ()) { | |
| String wordy = itr.nextToken (); | |
| for (int m = 0; m < 15; m++){ | |
| if(m == wordy.length ()){ | |
| int counter = 0; | |
| for(int x = 0; x < wordy.length (); x++){ | |
| if(wordy.charAt (x)== 'a' || wordy.charAt (x)== 'e' || wordy.charAt (x)== 'i' || wordy.charAt (x)== 'o' || wordy.charAt (x)== 'u' || wordy.charAt (x)== 'y' || wordy.charAt (x)== 'A' || wordy.charAt (x)== 'E' || wordy.charAt (x)== 'I' || wordy.charAt (x)== 'O' || wordy.charAt (x)== 'U' || wordy.charAt (x)== 'Y'){ | |
| counter++; | |
| } | |
| } | |
| System.out.println(wordy + " of length " + m + " contains " + counter + " values!"); | |
| k.set (Integer.toString (m)); | |
| context.write( k, new IntWritable (counter) ); | |
| } | |
| k.set (Integer.toString (m)); | |
| context.write ( k, zero ); | |
| } | |
| } | |
| } | |
| } | |
| public static class IntSumReducer | |
| extends Reducer<Text,IntWritable,Text,DoubleWritable> { | |
| public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException { | |
| int key_val = Integer.parseInt (key.toString()); | |
| double sum = 0; | |
| double denom = 0; | |
| int[] arr = new int[key_val+1]; | |
| for (IntWritable val : values) { | |
| denom++; | |
| arr[val.get ()]++; | |
| } | |
| Text fin = new Text (); | |
| for (int i = 0; i < arr.length; i++) { | |
| fin.set(Integer.toString (key_val) + " " + i); | |
| context.write ( fin, new DoubleWritable(arr[i] / denom) ); | |
| } | |
| } | |
| } | |
| public static void main(String[] args) throws Exception { | |
| JobConf conf = new JobConf(fourB.class); | |
| conf.setOutputKeyClass(IntWritable.class); | |
| conf.setOutputValueClass(IntWritable.class); | |
| conf.setMapperClass(EmitVowels.class); | |
| conf.setReducerClass(Reduce.class); | |
| conf.setInputFormat(TextInputFormat.class); | |
| conf.setOutputFormat(TextOutputFormat.class); | |
| FileInputFormat.setInputPaths(conf, new Path(args[0])); | |
| FileOutputFormat.setOutputPath(conf, new Path(args[1])); | |
| JobClient.runJob(conf); | |
| } | |
| } |
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