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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright (c) Kitware, Inc.
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkXMLPartitionedDataSetCollectionReader.h"
#include "vtkBase64Utilities.h"
#include "vtkCompositeDataPipeline.h"
#include "vtkCompositeDataSet.h"
#include "vtkDataAssembly.h"
#include "vtkDataSet.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPartitionedDataSet.h"
#include "vtkPartitionedDataSetCollection.h"
#include "vtkSmartPointer.h"
#include "vtkXMLDataElement.h"
#include <cctype> // for std::isspace
VTK_ABI_NAMESPACE_BEGIN
namespace
{
vtkSmartPointer<vtkDataAssembly> ReadDataAssembly(
vtkXMLDataElement* elem, vtkXMLPartitionedDataSetCollectionReader* self)
{
if (elem->GetAttribute("encoding") == nullptr ||
strcmp(elem->GetAttribute("encoding"), "base64") != 0 || elem->GetCharacterData() == nullptr)
{
vtkWarningWithObjectMacro(self, "Unsupported DataAssembly encoding. Ignoring.");
return nullptr;
}
vtkNew<vtkDataAssembly> assembly;
const char* encoded_buffer = elem->GetCharacterData();
size_t len_encoded_data = strlen(encoded_buffer);
char* decoded_buffer = new char[len_encoded_data];
// remove leading whitespace, if any.
while (std::isspace(static_cast<int>(*encoded_buffer)))
{
++encoded_buffer;
--len_encoded_data;
}
auto decoded_buffer_len =
vtkBase64Utilities::DecodeSafely(reinterpret_cast<const unsigned char*>(encoded_buffer),
len_encoded_data, reinterpret_cast<unsigned char*>(decoded_buffer), len_encoded_data);
decoded_buffer[decoded_buffer_len] = '\0';
assembly->InitializeFromXML(decoded_buffer);
delete[] decoded_buffer;
return assembly;
}
}
vtkStandardNewMacro(vtkXMLPartitionedDataSetCollectionReader);
//------------------------------------------------------------------------------
vtkXMLPartitionedDataSetCollectionReader::vtkXMLPartitionedDataSetCollectionReader() = default;
//------------------------------------------------------------------------------
vtkXMLPartitionedDataSetCollectionReader::~vtkXMLPartitionedDataSetCollectionReader() = default;
//------------------------------------------------------------------------------
void vtkXMLPartitionedDataSetCollectionReader::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
int vtkXMLPartitionedDataSetCollectionReader::FillOutputPortInformation(
int vtkNotUsed(port), vtkInformation* info)
{
info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkPartitionedDataSetCollection");
return 1;
}
//------------------------------------------------------------------------------
const char* vtkXMLPartitionedDataSetCollectionReader::GetDataSetName()
{
return "vtkPartitionedDataSetCollection";
}
//------------------------------------------------------------------------------
void vtkXMLPartitionedDataSetCollectionReader::ReadComposite(vtkXMLDataElement* element,
vtkCompositeDataSet* composite, const char* filePath, unsigned int& dataSetIndex)
{
vtkPartitionedDataSetCollection* col = vtkPartitionedDataSetCollection::SafeDownCast(composite);
vtkPartitionedDataSet* ds = vtkPartitionedDataSet::SafeDownCast(composite);
if (!col && !ds)
{
vtkErrorMacro("Unsupported composite dataset.");
return;
}
// count partitions to guide partition allocation when reading in parallel.
const unsigned int numberOfParitions =
ds ? vtkXMLCompositeDataReader::CountNestedElements(element, "DataSet") : 0;
unsigned int maxElems = element->GetNumberOfNestedElements();
for (unsigned int cc = 0; cc < maxElems; ++cc)
{
vtkXMLDataElement* childXML = element->GetNestedElement(cc);
if (!childXML || !childXML->GetName())
{
continue;
}
int index = 0;
if (!childXML->GetScalarAttribute("index", index))
// if index not in the structure file, then
// set up to add at the end
{
if (col)
{
index = col->GetNumberOfPartitionedDataSets();
}
else if (ds)
{
index = ds->GetNumberOfPartitions();
}
}
// child is a leaf node, read and insert.
const char* tagName = childXML->GetName();
if (strcmp(tagName, "DataSet") == 0)
{
vtkSmartPointer<vtkDataObject> childDS;
if (this->ShouldReadDataSet(dataSetIndex, index, numberOfParitions))
{
// Read
childDS.TakeReference(this->ReadDataObject(childXML, filePath));
}
// insert
ds->SetPartition(index, childDS);
dataSetIndex++;
}
else if (col != nullptr && strcmp(tagName, "Partitions") == 0)
{
vtkPartitionedDataSet* childDS = vtkPartitionedDataSet::New();
this->ReadComposite(childXML, childDS, filePath, dataSetIndex);
col->SetPartitionedDataSet(index, childDS);
childDS->Delete();
// if XML node has name, set read that.
if (auto name = childXML->GetAttribute("name"))
{
col->GetMetaData(index)->Set(vtkCompositeDataSet::NAME(), name);
}
}
else if (col != nullptr && strcmp(tagName, "DataAssembly") == 0)
{
auto assembly = ::ReadDataAssembly(childXML, this);
col->SetDataAssembly(assembly);
}
else
{
vtkErrorMacro("Syntax error in file.");
return;
}
}
}
VTK_ABI_NAMESPACE_END
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