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/*=========================================================================
Program: Visualization Toolkit
Module: TestDispatchers.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.
=========================================================================*/
// .NAME Test Dispatchers
// .SECTION Description
// Tests vtkDataArrayDispatcher
#include "vtkObjectFactory.h"
#include "vtkDataArrayDispatcher.h"
#include "vtkNew.h"
//classes we will be using in the test
#include "vtkDoubleArray.h"
#include "vtkIntArray.h"
#include <stdexcept>
#include <algorithm>
namespace
{
void test_expression(bool valid, std::string msg)
{
if(!valid)
{
throw std::runtime_error(msg);
}
}
template<typename T, typename U>
inline T* as(U* u)
{
return dynamic_cast<T*>(u);
}
//returns the length of an array
struct lengthCheckFunctor
{
template<typename T>
vtkIdType operator()(const vtkDataArrayDispatcherPointer<T>& array) const
{
return array.NumberOfComponents * array.NumberOfTuples;
}
};
//accumlates the length of all arrays used with this functor
struct storeLengthFunctor
{
vtkIdType length;
storeLengthFunctor():length(0){}
template<typename T>
void operator()(vtkDataArrayDispatcherPointer<T> array)
{
length += array.NumberOfComponents * array.NumberOfTuples;
}
};
//modifies an array to be sorted, only works with arrays
//that have one component
struct sortArray
{
template<typename T>
void operator()(vtkDataArrayDispatcherPointer<T> array) const
{
std::sort(array.RawPointer,array.RawPointer + array.NumberOfTuples);
}
};
bool TestDataArrayDispatchStatefull()
{
storeLengthFunctor functor;
vtkDataArrayDispatcher<storeLengthFunctor> dispatcher(functor);
//verify the dispatching
vtkNew<vtkDoubleArray> doubleArray;
vtkNew<vtkIntArray> intArray;
doubleArray->SetNumberOfComponents(4);
doubleArray->SetNumberOfTuples(10);
intArray->SetNumberOfTuples(13);
const vtkIdType doubleSize =
doubleArray->GetNumberOfComponents() * doubleArray->GetNumberOfTuples();
const vtkIdType intSize =
intArray->GetNumberOfComponents() * intArray->GetNumberOfTuples();
dispatcher.Go(as<vtkDataArray>(doubleArray.GetPointer()));
test_expression(functor.length==doubleSize,
"double array dispatch failed with statefull functor");
dispatcher.Go(intArray.GetPointer());
test_expression(functor.length==intSize+doubleSize,
"int array dispatch failed with statefull functor");
return true;
}
bool TestDataArrayDispatchStateless()
{
vtkDataArrayDispatcher<lengthCheckFunctor,int> dispatcher;
//verify the dispatching
vtkNew<vtkDoubleArray> doubleArray;
vtkNew<vtkIntArray> intArray;
doubleArray->SetNumberOfComponents(4);
doubleArray->SetNumberOfTuples(10);
intArray->SetNumberOfTuples(13);
const vtkIdType doubleSize =
doubleArray->GetNumberOfComponents() * doubleArray->GetNumberOfTuples();
const vtkIdType intSize =
intArray->GetNumberOfComponents() * intArray->GetNumberOfTuples();
vtkIdType result = dispatcher.Go(doubleArray.GetPointer());
test_expression(result == doubleSize,
"double array dispatch failed with stateless functor");
result = dispatcher.Go(intArray.GetPointer());
test_expression(result==intSize,
"int array dispatch failed with stateless functor");
return true;
}
bool TestDataArrayDispatchSort()
{
vtkDataArrayDispatcher<sortArray> dispatcher;
//verify the dispatching
vtkNew<vtkDoubleArray> doubleArray;
const int doubleSize=10;
doubleArray->SetNumberOfTuples(doubleSize);
for(int i=0; i < doubleSize; i++)
{
doubleArray->SetValue(i,doubleSize-i);
}
dispatcher.Go(doubleArray.GetPointer());
for(int i=0; i < doubleSize; i++)
{
test_expression(doubleArray->GetValue(i)==i+1,
"sort functor failed");
}
return true;
}
}
int TestDataArrayDispatcher(int /*argc*/, char* /*argv*/[])
{
bool passed = TestDataArrayDispatchStatefull();
passed &= TestDataArrayDispatchStateless();
passed &= TestDataArrayDispatchSort();
return passed ? 0 : 1;
}
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