Examples of cascading.flow.FlowElement

cascading.flow.FlowElement
Interface FlowElement is a utility interface used internally to simplify DAG management. It is not intended for users to interact with these methods directly.

    {
    DepthFirstIterator<FlowElement, Scope> iterator = getDepthFirstIterator();


    while( iterator.hasNext() )
      {
      FlowElement flowElement = iterator.next();


      if( flowElement.getClass() == Pipe.class || flowElement.getClass() == Checkpoint.class ||
        flowElement instanceof SubAssembly || testPlannerLevel( flowElement ) )
        {
        // Pipe class is guaranteed to have one input
        removeElement( flowElement );

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    Scope incoming = incomingScopes.iterator().next();
    Set<Scope> outgoingScopes = outgoingEdgesOf( flowElement );


    // source -> incoming -> flowElement -> outgoing -> target
    FlowElement source = getEdgeSource( incoming );


    for( Scope outgoing : outgoingScopes )
      {
      FlowElement target = getEdgeTarget( outgoing );


      addEdge( source, target, new Scope( outgoing ) );
      }


    removeVertex( flowElement );

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    {
    TopologicalOrderIterator<FlowElement, Scope> topoIterator = getTopologicalIterator();


    while( topoIterator.hasNext() )
      {
      FlowElement flowElement = topoIterator.next();


      if( type.isInstance( flowElement ) && inDegreeOf( flowElement ) >= minInDegree && outDegreeOf( flowElement ) >= minOutDegree )
        results.add( (P) flowElement );
      }

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    addEdge( previousElement, flowElement, new Scope( name ) );


    for( Scope scope : outgoing )
      {
      FlowElement target = getEdgeTarget( scope );
      removeEdge( previousElement, target ); // remove scope
      addEdge( flowElement, target, scope ); // add scope back
      }
    }

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      List<Scope> path = element.getEdgeList();
      Tap lastTap = null;


      for( Scope scope : path )
        {
        FlowElement target = getEdgeTarget( scope );


        if( target instanceof Extent )
          continue;


        if( !( target instanceof Tap ) )

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    if( !containsVertex( replacement ) )
      addVertex( replacement );


    for( Scope scope : incoming )
      {
      FlowElement source = getEdgeSource( scope );
      removeEdge( source, element ); // remove scope


      // drop edge between, if any
      if( source != replacement )
        addEdge( source, replacement, scope ); // add scope back
      }


    for( Scope scope : outgoing )
      {
      FlowElement target = getEdgeTarget( scope );
      removeEdge( element, target ); // remove scope


      // drop edge between, if any
      if( target != replacement )
        addEdge( replacement, target, scope ); // add scope back

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  protected void copyFrom( DirectedGraph<FlowElement, Scope> parent )
    {
    // safe to assume there are no unconnected vertices
    for( Scope edge : parent.edgeSet() )
      {
      FlowElement s = parent.getEdgeSource( edge );
      FlowElement t = parent.getEdgeTarget( edge );
      addVertex( s );
      addVertex( t );
      addEdge( s, t, edge );
      }
    }

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