source: sample/hadoop-0.17/tw/org/nchc/demo/DemoReadPackedRecords.java

/*
 * Cloud9: A MapReduce Library for Hadoop
 * 
 * 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 tw.org.nchc.demo;

import java.io.IOException;

import tw.org.nchc.tuple.Tuple;
import tw.org.nchc.util.LocalTupleRecordReader;

/**
 * Demo that illustrates how to read records from a local SequenceFile. Dumps
 * the contents of the SequenceFile generated by {@link DemoPackRecords}.
 */
public class DemoReadPackedRecords {
  private DemoReadPackedRecords() {
  }

  private static final Tuple tuple = new Tuple();

  /**
   * Runs the demo.
   */
  public static void main(String[] args) throws IOException {
    String file = "../umd-hadoop-dist/sample-input/bible+shakes.nopunc.packed";

    // open local records file
    LocalTupleRecordReader reader = new LocalTupleRecordReader(file);
    // iterate over all tuples
    while (reader.read(tuple)) {
      // print out each tuple
      System.out.println(tuple);
    }
    reader.close();

    System.out.println("Read " + reader.getRecordCount() + " records.");
  }

}