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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkReaderAlgorithm.h"
#include "vtkDataObject.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
//------------------------------------------------------------------------------
VTK_ABI_NAMESPACE_BEGIN
vtkReaderAlgorithm::vtkReaderAlgorithm()
{
// by default assume filters have one input and one output
// subclasses that deviate should modify this setting
this->SetNumberOfOutputPorts(1);
}
//------------------------------------------------------------------------------
vtkReaderAlgorithm::~vtkReaderAlgorithm() = default;
//------------------------------------------------------------------------------
vtkTypeBool vtkReaderAlgorithm::ProcessRequest(
vtkInformation* request, vtkInformationVector** vtkNotUsed(inInfo), vtkInformationVector* outInfo)
{
using vtkSDDP = vtkStreamingDemandDrivenPipeline;
vtkInformation* reqs = outInfo->GetInformationObject(0);
const int hasTime = reqs->Has(vtkSDDP::UPDATE_TIME_STEP());
const double* steps = reqs->Get(vtkStreamingDemandDrivenPipeline::TIME_STEPS());
int timeIndex = 0;
if (hasTime && steps)
{
double requestedTimeStep = reqs->Get(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP());
int length = reqs->Length(vtkStreamingDemandDrivenPipeline::TIME_STEPS());
// find the first time value larger than requested time value
// this logic could be improved
int cnt = 0;
while (cnt < length - 1 && steps[cnt] < requestedTimeStep)
{
cnt++;
}
timeIndex = cnt;
}
int result = 1;
if (request->Has(vtkSDDP::REQUEST_DATA_OBJECT()))
{
vtkDataObject* currentOutput = vtkDataObject::GetData(outInfo);
vtkDataObject* output = this->CreateOutput(currentOutput);
if (output)
{
result = 1;
if (output != currentOutput)
{
outInfo->GetInformationObject(0)->Set(vtkDataObject::DATA_OBJECT(), output);
output->Delete();
}
}
}
else if (request->Has(vtkSDDP::REQUEST_INFORMATION()))
{
try
{
result = this->ReadMetaData(outInfo->GetInformationObject(0));
}
catch (const std::exception&)
{
result = 0;
}
}
else if (request->Has(vtkSDDP::REQUEST_TIME_DEPENDENT_INFORMATION()))
{
try
{
result = this->ReadTimeDependentMetaData(timeIndex, outInfo->GetInformationObject(0));
}
catch (const std::exception&)
{
result = 0;
}
}
else if (request->Has(vtkSDDP::REQUEST_DATA()))
{
int piece =
reqs->Has(vtkSDDP::UPDATE_PIECE_NUMBER()) ? reqs->Get(vtkSDDP::UPDATE_PIECE_NUMBER()) : 0;
int npieces = reqs->Has(vtkSDDP::UPDATE_NUMBER_OF_PIECES())
? reqs->Get(vtkSDDP::UPDATE_NUMBER_OF_PIECES())
: 1;
int nghosts = reqs->Get(vtkSDDP::UPDATE_NUMBER_OF_GHOST_LEVELS());
vtkDataObject* output = vtkDataObject::GetData(outInfo);
try
{
result = this->ReadMesh(piece, npieces, nghosts, timeIndex, output);
if (result)
{
result = this->ReadPoints(piece, npieces, nghosts, timeIndex, output);
}
if (result)
{
result = this->ReadArrays(piece, npieces, nghosts, timeIndex, output);
}
}
catch (const std::exception&)
{
result = 0;
}
if (!result && output != nullptr)
{
// cleanup output so we don't end up producing partial results.
output->Initialize();
}
if (hasTime && steps)
{
output->GetInformation()->Set(vtkDataObject::DATA_TIME_STEP(), steps[timeIndex]);
}
}
return result;
}
//------------------------------------------------------------------------------
void vtkReaderAlgorithm::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
VTK_ABI_NAMESPACE_END
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