ArcInputFormat.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.nutch.tools.arc;

import java.io.IOException;

import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileSplit;
import org.apache.hadoop.mapred.InputSplit;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordReader;
import org.apache.hadoop.mapred.Reporter;

/**
 * A input format the reads arc files.
 */
public class ArcInputFormat
  extends FileInputFormat<Text, BytesWritable> {

  /**
   * Returns the <code>RecordReader</code> for reading the arc file.
   * 
   * @param split The InputSplit of the arc file to process.
   * @param job The job configuration.
   * @param reporter The progress reporter.
   */
  public RecordReader<Text, BytesWritable> getRecordReader(InputSplit split,
      JobConf job, Reporter reporter)
    throws IOException {
    reporter.setStatus(split.toString());
    return new ArcRecordReader(job, (FileSplit)split);
  }

}