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45 lines (37 loc) · 1.52 KB
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/**
* Copyright 2013 Jesse Anderson
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
public class CardMapper extends Mapper<LongWritable, Text, Text, IntWritable> {
private static Pattern inputPattern = Pattern.compile("(.*) (\\d*)");
@Override
public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
String inputLine = value.toString();
Matcher inputMatch = inputPattern.matcher(inputLine);
// Use regex to throw out Jacks, Queens, Kings, Aces and Jokers
if (inputMatch.matches()) {
// Normalize inconsistent case for card suits
String cardSuit = inputMatch.group(1).toLowerCase();
int cardValue = Integer.parseInt(inputMatch.group(2));
context.write(new Text(cardSuit), new IntWritable(cardValue));
}
}
}