text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkCachedStreamingDemandDrivenPipeline.h
  
    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.
  
  =========================================================================*/
  // .NAME vtkCachedStreamingDemandDrivenPipeline -
  // .SECTION Description
  // vtkCachedStreamingDemandDrivenPipeline
  
  #ifndef __vtkCachedStreamingDemandDrivenPipeline_h
  #define __vtkCachedStreamingDemandDrivenPipeline_h
  
  #include "vtkStreamingDemandDrivenPipeline.h"
  
  class vtkInformationIntegerKey;
  class vtkInformationIntegerVectorKey;
  class vtkCachedStreamingDemandDrivenPipelineInternals;
  
  class VTK_FILTERING_EXPORT vtkCachedStreamingDemandDrivenPipeline : 
    public vtkStreamingDemandDrivenPipeline
  {
  public:
    static vtkCachedStreamingDemandDrivenPipeline* New();
    vtkTypeMacro(vtkCachedStreamingDemandDrivenPipeline,
                         vtkStreamingDemandDrivenPipeline);
    void PrintSelf(ostream& os, vtkIndent indent);
  
    // Description:
    // Bring the algorithm's outputs up-to-date.
    virtual int Update();
    virtual int Update(int port);
  
    // Description:
    // This is the maximum number of images that can be retained in memory.
    // it defaults to 10.
    void SetCacheSize(int size);
    vtkGetMacro(CacheSize, int);
  
  protected:
    vtkCachedStreamingDemandDrivenPipeline();
    ~vtkCachedStreamingDemandDrivenPipeline();
  
    virtual int NeedToExecuteData(int outputPort,
                                  vtkInformationVector** inInfoVec,
                                  vtkInformationVector* outInfoVec);
    virtual int ExecuteData(vtkInformation* request,
                            vtkInformationVector** inInfoVec,
                            vtkInformationVector* outInfoVec);
    
    int CacheSize;
    
    vtkDataObject **Data;
    unsigned long *Times;
  
  private:
    vtkCachedStreamingDemandDrivenPipelineInternals* CachedStreamingDemandDrivenInternal;
  private:
    vtkCachedStreamingDemandDrivenPipeline(const vtkCachedStreamingDemandDrivenPipeline&);  // Not implemented.
    void operator=(const vtkCachedStreamingDemandDrivenPipeline&);  // Not implemented.
  };
  
  #endif
  