text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkTableAlgorithm.cxx
  
    Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
    All rights reserved.
    See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
  
       This software is distributed WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.  See the above copyright notice for more information.
  
  =========================================================================*/
  /*-------------------------------------------------------------------------
    Copyright 2008 Sandia Corporation.
    Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
    the U.S. Government retains certain rights in this software.
  -------------------------------------------------------------------------*/
  
  #include "vtkTableAlgorithm.h"
  
  #include "vtkCommand.h"
  #include "vtkInformation.h"
  #include "vtkInformationVector.h"
  #include "vtkObjectFactory.h"
  #include "vtkStreamingDemandDrivenPipeline.h"
  #include "vtkTable.h"
  
  vtkStandardNewMacro(vtkTableAlgorithm);
  
  //------------------------------------------------------------------------------
  vtkTableAlgorithm::vtkTableAlgorithm()
  {
    // by default assume filters have one input and one output
    // subclasses that deviate should modify this setting
    this->SetNumberOfInputPorts(1);
    this->SetNumberOfOutputPorts(1);
  }
  
  //------------------------------------------------------------------------------
  vtkTableAlgorithm::~vtkTableAlgorithm() = default;
  
  //------------------------------------------------------------------------------
  void vtkTableAlgorithm::PrintSelf(ostream& os, vtkIndent indent)
  {
    this->Superclass::PrintSelf(os, indent);
  }
  
  //------------------------------------------------------------------------------
  vtkTypeBool vtkTableAlgorithm::ProcessRequest(
    vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
  {
    // generate the data
    if (request->Has(vtkDemandDrivenPipeline::REQUEST_DATA()))
    {
      return this->RequestData(request, inputVector, outputVector);
    }
  
    if (request->Has(vtkStreamingDemandDrivenPipeline::REQUEST_UPDATE_EXTENT()))
    {
      return this->RequestUpdateExtent(request, inputVector, outputVector);
    }
  
    // execute information
    if (request->Has(vtkDemandDrivenPipeline::REQUEST_INFORMATION()))
    {
      return this->RequestInformation(request, inputVector, outputVector);
    }
  
    return this->Superclass::ProcessRequest(request, inputVector, outputVector);
  }
  
  //------------------------------------------------------------------------------
  int vtkTableAlgorithm::FillOutputPortInformation(int vtkNotUsed(port), vtkInformation* info)
  {
    // now add our info
    info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkTable");
    return 1;
  }
  
  //------------------------------------------------------------------------------
  int vtkTableAlgorithm::FillInputPortInformation(int vtkNotUsed(port), vtkInformation* info)
  {
    info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkTable");
    return 1;
  }
  
  //------------------------------------------------------------------------------
  vtkTable* vtkTableAlgorithm::GetOutput(int index)
  {
    return vtkTable::SafeDownCast(this->GetOutputDataObject(index));
  }
  
  //------------------------------------------------------------------------------
  void vtkTableAlgorithm::SetInputData(int index, vtkDataObject* input)
  {
    this->SetInputDataInternal(index, input);
  }
  
  //------------------------------------------------------------------------------
  int vtkTableAlgorithm::RequestInformation(vtkInformation* vtkNotUsed(request),
    vtkInformationVector** vtkNotUsed(inputVector), vtkInformationVector* vtkNotUsed(outputVector))
  {
    // do nothing let subclasses handle it
    return 1;
  }
  
  //------------------------------------------------------------------------------
  int vtkTableAlgorithm::RequestUpdateExtent(vtkInformation* vtkNotUsed(request),
    vtkInformationVector** inputVector, vtkInformationVector* vtkNotUsed(outputVector))
  {
    int numInputPorts = this->GetNumberOfInputPorts();
    for (int i = 0; i < numInputPorts; i++)
    {
      int numInputConnections = this->GetNumberOfInputConnections(i);
      for (int j = 0; j < numInputConnections; j++)
      {
        vtkInformation* inputInfo = inputVector[i]->GetInformationObject(j);
        inputInfo->Set(vtkStreamingDemandDrivenPipeline::EXACT_EXTENT(), 1);
      }
    }
    return 1;
  }
  
  //------------------------------------------------------------------------------
  // This is the superclasses style of Execute method.  Convert it into
  // an imaging style Execute method.
  int vtkTableAlgorithm::RequestData(vtkInformation* vtkNotUsed(request),
    vtkInformationVector** vtkNotUsed(inputVector), vtkInformationVector* vtkNotUsed(outputVector))
  {
    return 0;
  }
  