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vtkTableToTreeFilter.cxx
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vtkTableToTreeFilter.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTableToTreeFilter.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 "vtkTableToTreeFilter.h"
#include "vtkIdTypeArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMutableDirectedGraph.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkSmartPointer.h"
#include "vtkStringArray.h"
#include "vtkStdString.h"
#include "vtkTable.h"
#include "vtkTree.h"
#include <vtkstd/algorithm>
#include <vtkstd/vector>
#include <vtkstd/string>
vtkStandardNewMacro(vtkTableToTreeFilter);
vtkTableToTreeFilter::vtkTableToTreeFilter()
{
}
vtkTableToTreeFilter::~vtkTableToTreeFilter()
{
}
void vtkTableToTreeFilter::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
int vtkTableToTreeFilter::FillOutputPortInformation(
int vtkNotUsed(port), vtkInformation* info)
{
// now add our info
info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkTree");
return 1;
}
int vtkTableToTreeFilter::FillInputPortInformation(
int vtkNotUsed(port), vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkTable");
return 1;
}
int vtkTableToTreeFilter::RequestData(
vtkInformation*,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
// Get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// Storing the inputTable and outputTree handles
vtkTable* table = vtkTable::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkTree* tree = vtkTree::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkSmartPointer<vtkTable> new_table = vtkSmartPointer<vtkTable>::New();
new_table->DeepCopy( table );
// Create a mutable graph for building the tree
vtkSmartPointer<vtkMutableDirectedGraph> builder =
vtkSmartPointer<vtkMutableDirectedGraph>::New();
// Check for a corner case where we have a table with 0 rows
if (new_table->GetNumberOfRows() != 0)
{
// The tree will have one more vertex than the number of rows
// in the table (the extra vertex is the new root).
for (vtkIdType v = 0; v <= new_table->GetNumberOfRows(); ++v)
{
builder->AddVertex();
}
// Make a star, originating at the new root (the last vertex).
vtkIdType root = new_table->GetNumberOfRows();
for (vtkIdType v = 0; v < new_table->GetNumberOfRows(); ++v)
{
builder->AddEdge(root, v);
}
// Insert a row in the table for the new root.
new_table->InsertNextBlankRow(-1);
}
// Move the structure of the mutable graph into the tree.
if (!tree->CheckedShallowCopy(builder))
{
vtkErrorMacro(<<"Built graph is not a valid tree!");
return 0;
}
// Copy the table data into the tree vertex data
tree->GetVertexData()->PassData(new_table->GetRowData());
// The edge data should at least have a pedigree id array.
vtkSmartPointer<vtkIdTypeArray> edgeIds =
vtkSmartPointer<vtkIdTypeArray>::New();
edgeIds->SetName("TableToTree edge");
vtkIdType numEdges = tree->GetNumberOfEdges();
edgeIds->SetNumberOfTuples(numEdges);
for (vtkIdType i = 0; i < numEdges; ++i)
{
edgeIds->SetValue(i, i);
}
tree->GetEdgeData()->SetPedigreeIds(edgeIds);
return 1;
}