How to use

getConf

method

in

org.apache.hadoop.mapreduce.lib.join.CompositeRecordReader

/**
 * Create a new key common to all child RRs.
 * @throws ClassCastException if key classes differ.
 */
@SuppressWarnings("unchecked")
protected K createKey() {
 if (keyclass == null || keyclass.equals(NullWritable.class)) {
  return (K) NullWritable.get();
 }
 return (K) ReflectionUtils.newInstance(keyclass, getConf());
}

/**
 * Create a new key common to all child RRs.
 * @throws ClassCastException if key classes differ.
 */
@SuppressWarnings("unchecked")
protected K createKey() {
 if (keyclass == null || keyclass.equals(NullWritable.class)) {
  return (K) NullWritable.get();
 }
 return (K) ReflectionUtils.newInstance(keyclass, getConf());
}

/**
 * Create a new key common to all child RRs.
 * @throws ClassCastException if key classes differ.
 */
@SuppressWarnings("unchecked")
protected K createKey() {
 if (keyclass == null || keyclass.equals(NullWritable.class)) {
  return (K) NullWritable.get();
 }
 return (K) ReflectionUtils.newInstance(keyclass, getConf());
}

/**
 * Create a new key common to all child RRs.
 * @throws ClassCastException if key classes differ.
 */
@SuppressWarnings("unchecked")
protected K createKey() {
 if (keyclass == null || keyclass.equals(NullWritable.class)) {
  return (K) NullWritable.get();
 }
 return (K) ReflectionUtils.newInstance(keyclass, getConf());
}

/**
 * Create a new key common to all child RRs.
 * @throws ClassCastException if key classes differ.
 */
@SuppressWarnings("unchecked")
protected K createKey() {
 if (keyclass == null || keyclass.equals(NullWritable.class)) {
  return (K) NullWritable.get();
 }
 return (K) ReflectionUtils.newInstance(keyclass, getConf());
}