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/*
* (C) Copyright 2025- ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
* In applying this licence, ECMWF does not waive the privileges and immunities
* granted to it by virtue of its status as an intergovernmental organisation nor
* does it submit to any jurisdiction.
*/
#include <chunked_data_view/ChunkedDataView.h>
#include <chunked_data_view/ChunkedDataViewBuilder.h>
#include <chunked_data_view/DataLayout.h>
#include <chunked_data_view/Extractor.h>
#include <chunked_data_view/Fdb.h>
#include <eckit/io/MemoryHandle.h>
#include <eckit/testing/Test.h>
#include <fdb5/api/helpers/FDBToolRequest.h>
#include <cstddef>
#include <cstdint>
#include <functional>
#include <memory>
#include <optional>
#include <string>
#include <tuple>
#include <type_traits>
#include <utility>
#include <vector>
#include "chunked_data_view/Axis.h"
#include "chunked_data_view/AxisDefinition.h"
#include "chunked_data_view/ListIterator.h"
#include "eckit/io/DataHandle.h"
#include "fdb5/database/FieldLocation.h"
#include "fdb5/database/Inspector.h"
#include "metkit/mars/MarsRequest.h"
using fdb5::FDBToolRequest;
//==============================================================================
namespace cdv = chunked_data_view;
std::unique_ptr<eckit::DataHandle> makeHandle(const std::vector<double>& values) {
const size_t size = values.size() * sizeof(std::decay_t<decltype(values)>::value_type) + 2 * sizeof(size_t);
const size_t bytesPerValue = 8;
auto handle = std::make_unique<eckit::MemoryHandle>(size);
size_t _{};
handle->openForWrite(_);
size_t countValues = values.size();
handle->write(&countValues, sizeof(size_t));
handle->write(&bytesPerValue, sizeof(size_t));
handle->write(values.data(), values.size() * sizeof(std::decay_t<decltype(values)>::value_type));
handle->close();
return handle;
};
struct MockListIterator final : public chunked_data_view::ListIteratorInterface {
using vec2 = std::vector<std::tuple<fdb5::Key, std::vector<double>>>;
vec2 data_;
vec2::const_iterator iter_;
MockListIterator(vec2 data) : data_(std::move(data)), iter_(std::begin(data_)) {};
std::optional<std::tuple<fdb5::Key, std::unique_ptr<eckit::DataHandle>>> next() {
iter_++;
if (std::end(data_) == iter_) {
return std::nullopt;
}
return std::make_tuple(std::get<0>(*iter_), makeHandle(std::get<1>(*iter_)));
};
};
struct MockFdb final : public cdv::FdbInterface {
using RetFunc = std::function<std::unique_ptr<eckit::DataHandle>(const metkit::mars::MarsRequest&)>;
using InsFunc =
std::function<std::unique_ptr<chunked_data_view::ListIteratorInterface>(const metkit::mars::MarsRequest&)>;
explicit MockFdb(RetFunc retFunc, InsFunc insFunc) : retFn(std::move(retFunc)), insFn(std::move(insFunc)) {}
std::unique_ptr<eckit::DataHandle> retrieve(const metkit::mars::MarsRequest& request) override {
return retFn(request);
};
std::unique_ptr<chunked_data_view::ListIteratorInterface> inspect(
const metkit::mars::MarsRequest& request) override {
return insFn(request);
}
RetFunc retFn{};
InsFunc insFn{};
};
struct FakeExtractor : public cdv::Extractor {
cdv::DataLayout layout(eckit::DataHandle& handle) const override {
cdv::DataLayout layout{};
handle.openForRead();
EXPECT_EQUAL(handle.read(&layout.countValues, sizeof(layout.countValues)), sizeof(layout.countValues));
EXPECT_EQUAL(handle.read(&layout.bytesPerValue, sizeof(layout.bytesPerValue)), sizeof(layout.bytesPerValue));
handle.close();
return layout;
}
void writeInto(const metkit::mars::MarsRequest& request,
std::unique_ptr<chunked_data_view::ListIteratorInterface> list_iterator,
const std::vector<chunked_data_view::Axis>& axes, const chunked_data_view::DataLayout& layout,
float* ptr, size_t len, size_t expected_msg_count) const override {
cdv::DataLayout readLayout{};
while (auto res = list_iterator->next()) {
if (!res) {
break;
}
const auto& key = std::get<0>(*res);
auto& data_handle = std::get<1>(*res);
data_handle->openForRead();
EXPECT_EQUAL(data_handle->read(&readLayout.countValues, sizeof(layout.countValues)), 8l);
EXPECT_EQUAL(data_handle->read(&readLayout.bytesPerValue, sizeof(layout.bytesPerValue)), 4l);
const size_t totalBytes = layout.countValues * layout.bytesPerValue;
EXPECT_EQUAL(data_handle->read(ptr, totalBytes), totalBytes);
}
};
};
CASE("ChunkedDataView | View from 1 request | Can compute shape") {
const std::string keys{
"type=an,"
"domain=g,"
"expver=0001,"
"stream=oper,"
"date=2020-01-01/to/2020-01-04,"
"levtype=sfc,"
"param=v/u,"
"time=0/6/12/18"};
const auto request = FDBToolRequest::requestsFromString(keys).at(0).request();
const auto view =
cdv::ChunkedDataViewBuilder(
std::make_unique<MockFdb>([](auto& _) { return makeHandle({1, 2, 3, 4, 5, 6, 7, 8, 9, 10}); },
[](auto& _) -> std::unique_ptr<chunked_data_view::ListIteratorInterface> {
return std::make_unique<MockListIterator>(
std::vector<std::tuple<fdb5::Key, std::vector<double>>>{std::make_tuple(
fdb5::Key(), std::vector<double>{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})});
}))
.addPart(keys,
{cdv::AxisDefinition{{"date"}, true}, cdv::AxisDefinition{{"time"}, true},
cdv::AxisDefinition{{"param"}, false}},
std::make_unique<FakeExtractor>())
.build();
//
// Expect to get: 4 dates, 4 times, 2 fields, 10 values per field (implicit axis)
EXPECT_EQUAL(view->shape(), (std::vector<size_t>{4, 4, 2, 10}));
EXPECT_EQUAL(view->chunks(), (std::vector<size_t>{4, 4, 1, 1}));
EXPECT_EQUAL(view->chunkShape(), (std::vector<size_t>{1, 1, 2, 10}));
}
CASE("ChunkedDataView | View from 2 requests | Can compute shape") {
const std::string keys{
"type=an,"
"domain=g,"
"expver=0001,"
"stream=oper,"
"date=2020-01-01/to/2020-01-04,"
"levtype=sfc,"
"param=v/u,"
"time=0/6/12/18"};
const auto request = FDBToolRequest::requestsFromString(keys).at(0).request();
const auto view =
cdv::ChunkedDataViewBuilder(
std::make_unique<MockFdb>(
[](auto& _) { return makeHandle({1, 2, 3, 4, 5, 6, 7, 8, 9, 10}); },
[](auto& _) -> std::unique_ptr<chunked_data_view::ListIteratorInterface> {
return std::make_unique<MockListIterator>(std::vector<std::tuple<fdb5::Key, std::vector<double>>>{
std::make_tuple(fdb5::Key(), std::vector<double>{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}),
});
}))
.addPart(keys,
{cdv::AxisDefinition{{"date"}, true}, cdv::AxisDefinition{{"time"}, true},
cdv::AxisDefinition{{"param"}, true}},
std::make_unique<FakeExtractor>())
.addPart(keys,
{cdv::AxisDefinition{{"date"}, true}, cdv::AxisDefinition{{"time"}, true},
cdv::AxisDefinition{{"param"}, true}},
std::make_unique<FakeExtractor>())
.extendOnAxis(2)
.build();
// Expect to get: 4 dates, 4 times, 2*2 fields (2 per request), 10 values per field (implicit axis)
EXPECT_EQUAL(view->shape(), (std::vector<size_t>{4, 4, 4, 10}));
}
CASE("ChunkedDataView | View from 2 requests | Can compute shape, combined axis") {
const std::string keys{
"type=an,"
"domain=g,"
"expver=0001,"
"stream=oper,"
"date=2020-01-01/to/2020-01-04,"
"levtype=sfc,"
"param=v/u,"
"time=0/6/12/18"};
const auto request = FDBToolRequest::requestsFromString(keys).at(0).request();
const auto view =
cdv::ChunkedDataViewBuilder(
std::make_unique<MockFdb>(
[](auto& _) { return makeHandle({1, 2, 3, 4, 5, 6, 7, 8, 9, 10}); },
[](auto& _) -> std::unique_ptr<chunked_data_view::ListIteratorInterface> {
return std::make_unique<MockListIterator>(std::vector<std::tuple<fdb5::Key, std::vector<double>>>{
std::make_tuple(fdb5::Key(), std::vector<double>{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}),
});
}))
.addPart(keys, {cdv::AxisDefinition{{"date", "time"}, true}, cdv::AxisDefinition{{"param"}, true}},
std::make_unique<FakeExtractor>())
.addPart(keys, {cdv::AxisDefinition{{"date", "time"}, true}, cdv::AxisDefinition{{"param"}, true}},
std::make_unique<FakeExtractor>())
.extendOnAxis(1)
.build();
// Expect to get: 16 date/times (4 dates * 4 times), 2*2 fields (2 per request), 10 values per field (implicit axis)
EXPECT_EQUAL(view->shape(), (std::vector<size_t>{16, 4, 10}));
}
CASE("ChunkedDataView - Can build") {
const std::string keys{
"type=an,"
"domain=g,"
"expver=0001,"
"stream=oper,"
"date=2020-01-01/to/2020-01-04,"
"levtype=sfc,"
"param=v/u,"
"time=0/6/12/18"};
const auto request = FDBToolRequest::requestsFromString(keys).at(0).request();
EXPECT_NO_THROW(
cdv::ChunkedDataViewBuilder(
std::make_unique<MockFdb>(
[](auto& _) { return makeHandle({1, 2, 3, 4, 5, 6, 7, 8, 9, 10}); },
[](auto& _) -> std::unique_ptr<chunked_data_view::ListIteratorInterface> {
return std::make_unique<MockListIterator>(std::vector<std::tuple<fdb5::Key, std::vector<double>>>{
std::make_tuple(fdb5::Key(), std::vector<double>{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}),
});
}))
.addPart(keys,
{cdv::AxisDefinition{{"date"}, true}, cdv::AxisDefinition{{"time"}, true},
cdv::AxisDefinition{{"param"}, true}},
std::make_unique<FakeExtractor>())
.build());
}
int main(int argc, char** argv) {
return ::eckit::testing::run_tests(argc, argv);
}
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