##// END OF EJS Templates
Creates enum that represents the value types that can be read in AMDA...
Creates enum that represents the value types that can be read in AMDA This enum is passed in parameter of the reading method to parse the result file according to it

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r412:e1f4801c4363
r563:a08e6992e146
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AmdaParser.cpp
125 lines | 4.2 KiB | text/x-c | CppLexer
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Creates JSON parser
r354 #include "AmdaParser.h"
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r412 #include "AmdaDefs.h"
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r354
#include <DataSource/DataSourceItem.h>
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r355 #include <QFile>
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r356 #include <QJsonArray>
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r355 #include <QJsonDocument>
#include <QJsonObject>
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r354 Q_LOGGING_CATEGORY(LOG_AmdaParser, "AmdaParser")
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r355 namespace {
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r356 /// Returns the correct item type according to the key passed in parameter
DataSourceItemType itemType(const QString &key) noexcept
{
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r412 if (key == AMDA_PRODUCT_KEY) {
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r356 return DataSourceItemType::PRODUCT;
}
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r412 else if (key == AMDA_COMPONENT_KEY) {
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r356 return DataSourceItemType::COMPONENT;
}
else {
return DataSourceItemType::NODE;
}
}
/**
* Processes an entry of the JSON file to populate/create data source items
* @param jsonKey the entry's key
* @param jsonValue the entry's value
* @param item the current item for which the entry processing will be applied
* @param appendData flag indicating that the entry is part of an array. In the case of an array of
* values, each value will be concatenated to the others (rather than replacing the others)
*/
void parseEntry(const QString &jsonKey, const QJsonValue &jsonValue, DataSourceItem &item,
bool isArrayEntry = false)
{
if (jsonValue.isObject()) {
// Case of an object:
// - a new data source item is created and
// - parsing is called recursively to process the new item
// - the new item is then added as a child of the former item
auto object = jsonValue.toObject();
auto newItem = std::make_unique<DataSourceItem>(itemType(jsonKey));
for (auto it = object.constBegin(), end = object.constEnd(); it != end; ++it) {
parseEntry(it.key(), it.value(), *newItem);
}
item.appendChild(std::move(newItem));
}
else if (jsonValue.isArray()) {
// Case of an array: the item is populated with the arrays' content
auto object = jsonValue.toArray();
for (auto it = object.constBegin(), end = object.constEnd(); it != end; ++it) {
parseEntry(jsonKey, *it, item, true);
}
}
else {
// Case of a simple value: we add a data to the item. If the simple value is a part of an
// array, it is concatenated to the values already existing for this key
item.setData(jsonKey, jsonValue.toVariant(), isArrayEntry);
}
}
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r355 } // namespace
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r354 std::unique_ptr<DataSourceItem> AmdaParser::readJson(const QString &filePath) noexcept
{
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r355 QFile jsonFile{filePath};
if (!jsonFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
qCCritical(LOG_AmdaParser())
<< QObject::tr("Can't retrieve data source tree from file %1: %2")
.arg(filePath, jsonFile.errorString());
return nullptr;
}
auto json = jsonFile.readAll();
auto jsonDocument = QJsonDocument::fromJson(json);
// Check preconditions for parsing
if (!jsonDocument.isObject()) {
qCCritical(LOG_AmdaParser())
<< QObject::tr(
"Can't retrieve data source tree from file %1: the file is malformed (there is "
"not one and only one root object)")
.arg(filePath);
return nullptr;
}
auto jsonDocumentObject = jsonDocument.object();
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r412 if (!jsonDocumentObject.contains(AMDA_ROOT_KEY)) {
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r355 qCCritical(LOG_AmdaParser())
<< QObject::tr(
"Can't retrieve data source tree from file %1: the file is malformed (the key "
"for the root element was not found (%2))")
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r412 .arg(filePath, AMDA_ROOT_KEY);
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r355 return nullptr;
}
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r412 auto rootValue = jsonDocumentObject.value(AMDA_ROOT_KEY);
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r355 if (!rootValue.isObject()) {
qCCritical(LOG_AmdaParser())
<< QObject::tr(
"Can't retrieve data source tree from file %1: the file is malformed (the root "
"element is of the wrong type)")
.arg(filePath);
return nullptr;
}
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r356
// Makes the parsing
auto rootObject = rootValue.toObject();
auto rootItem = std::make_unique<DataSourceItem>(DataSourceItemType::NODE);
for (auto it = rootObject.constBegin(), end = rootObject.constEnd(); it != end; ++it) {
parseEntry(it.key(), it.value(), *rootItem);
}
return rootItem;
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r354 }