Examples of cascading.pipe.joiner.JoinerClosure

cascading.pipe.joiner.JoinerClosure

Class JoinerClosure wraps all incoming tuple streams with iterator instances allowing for just join implementations.

This class is provided to a {@link Joiner#getIterator(JoinerClosure)} implementation, or to a {@link cascading.operation.Buffer}via the {@link cascading.operation.BufferCall#getJoinerClosure()} method.

All iterators returned by {@link #getIterator(int)} may be retrieved more than once to restart them except for the leftmost iterator at position {@code 0} (zero).

This iterator may only be iterated across once. All other iterators are backed by memory and possibly disk.

    }


  @Override
  public void operate( FlowProcess flowProcess, BufferCall bufferCall )
    {
    JoinerClosure joinerClosure = bufferCall.getJoinerClosure();


    if( joinerClosure.size() != 2 )
      throw new IllegalArgumentException( "joiner size wrong" );


    Iterator<Tuple> lhs = joinerClosure.getIterator( 0 );


    while( lhs.hasNext() )
      {
      Tuple lhsTuple = lhs.next();


      Iterator<Tuple> rhs = joinerClosure.getIterator( 1 );


      while( rhs.hasNext() )
        {
        Tuple rhsTuple = rhs.next();

Examples of cascading.pipe.joiner.JoinerClosure

Related Classes of cascading.pipe.joiner.JoinerClosure