SampleTaggedMapOutput.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.hadoop.contrib.utils.join;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.Text;

import org.apache.hadoop.contrib.utils.join.TaggedMapOutput;

/**
 * This is a subclass of TaggedMapOutput that is used to
 * demonstrate the functionality of INNER JOIN between 2 data
 * sources (TAB separated text files) based on the first column.
 */
public class SampleTaggedMapOutput extends TaggedMapOutput {

  private Text data;

  public SampleTaggedMapOutput() {
    this.data = new Text("");
  }

  public SampleTaggedMapOutput(Text data) {
    this.data = data;
  }

  public Writable getData() {
    return data;
  }

  public void write(DataOutput out) throws IOException {
    this.tag.write(out);
    this.data.write(out);
  }

  public void readFields(DataInput in) throws IOException {
    this.tag.readFields(in);
    this.data.readFields(in);
  }
}