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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGDALVectorReader.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 vtkGDALVectorReader - Read vector file formats using GDAL.
// .SECTION Description
// vtkGDALVectorReader is a source object that reads vector files and uses
// GDAL as the underlying library for the task. GDAL is required for this
// reader. The output of the reader is a vtkMultiBlockDataSet
// .SECTION See Also
// vtkMultiBlockDataSet
#ifndef __vtkGDALVectorReader_h
#define __vtkGDALVectorReader_h
#include <vtkMultiBlockDataSetAlgorithm.h>
#include <vtkIOGDALModule.h> // For export macro
#include <map> // STL required.
class VTKIOGDAL_EXPORT vtkGDALVectorReader : public vtkMultiBlockDataSetAlgorithm
{
public:
static vtkGDALVectorReader* New();
virtual void PrintSelf( ostream& os, vtkIndent indent );
vtkTypeMacro(vtkGDALVectorReader,vtkMultiBlockDataSetAlgorithm);
vtkSetStringMacro(FileName);
vtkGetStringMacro(FileName);
// Description:
// Return number of layers.
int GetNumberOfLayers();
// Description:
// Given a index return layer type (eg point, line, polygon).
int GetLayerType(int layerIndex=0);
// Description:
// Given a layer index return number of features (shapes).
int GetFeatureCount(int layerIndex=0);
// Description:
// Return the active layer type (eg point, line, polygon).
int GetActiveLayerType();
// Description:
// Return the number of features in the active layer (shapes).
int GetActiveLayerFeatureCount();
// Description:
// Set and Get the active layer
vtkSetMacro(ActiveLayer,int);
vtkGetMacro(ActiveLayer,int);
// Description:
// Set and Get whether features are appended to a single
// vtkPolyData. Turning the option on is useful when a shapefile has
// a number of features which could otherwise lead to a huge
// multiblock structure.
vtkSetMacro(AppendFeatures, int);
vtkGetMacro(AppendFeatures, int);
vtkBooleanMacro(AppendFeatures, int);
//BTX
// Description:
// Return projection string belong to each layer.
std::map<int, std::string> GetLayersProjection();
//ETX
// Description:
// Return projection string belong to a layer.
const char* GetLayerProjection(int layerIndex);
protected:
vtkGDALVectorReader();
virtual ~vtkGDALVectorReader();
int RequestInformation( vtkInformation*, vtkInformationVector**, vtkInformationVector* );
int RequestData( vtkInformation*, vtkInformationVector**, vtkInformationVector* );
int InitializeInternal();
/// The name of the file that will be opened on the next call to RequestData()
char* FileName;
int ActiveLayer;
int AppendFeatures;
//BTX
class Internal;
/// Private per-file metadata
vtkGDALVectorReader::Internal* Implementation;
/// Global variable indicating whether the OGR library has been registered yet or not.
static int OGRRegistered;
/// Mapping of layer to projection.
std::map<int, std::string> LayersProjection;
//ETX
private:
vtkGDALVectorReader(const vtkGDALVectorReader&); // Not implemented.
void operator=(const vtkGDALVectorReader&); // Not implemented.
};
#endif // __vtkGDALVectorReader_h
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