/**
* Copyright 2011 Nube Technologies
*
* 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.
*/
package co.nubetech.hiho.dedup;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.io.compress.CompressionCodecFactory;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.log4j.Logger;
public class DelimitedTextInputFormat extends FileInputFormat<Text, Text> {
final static Logger logger = Logger
.getLogger(co.nubetech.hiho.dedup.DelimitedTextInputFormat.class);
public final static String DELIMITER_CONF = "mapreduce.input.hiho.delimited.delimiter";
public final static String COLUMN_CONF = "mapreduce.input.hiho.delimited.column";
@Override
public RecordReader<Text, Text> createRecordReader(InputSplit split,
TaskAttemptContext context) {
logger.debug("Delimiter is: "
+ context.getConfiguration().get(DELIMITER_CONF));
logger.debug("Column is: "
+ context.getConfiguration().getInt(COLUMN_CONF, 0));
return new DelimitedLineRecordReader();
}
@Override
protected boolean isSplitable(JobContext context, Path file) {
CompressionCodec codec = new CompressionCodecFactory(
context.getConfiguration()).getCodec(file);
return codec == null;
}
public static void setProperties(Job job, String delim, int column) {
job.getConfiguration().set(DELIMITER_CONF, delim);
job.getConfiguration().setInt(COLUMN_CONF, column);
}
}