/
jsonparser.cpp
151 lines (138 loc) · 3.96 KB
/
jsonparser.cpp
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#include "jsonparser.h"
jsonParser::jsonParser(QByteArray data)
{
jDoc = QJsonDocument::fromJson(data);
}
jsonParser::~jsonParser()
{
}
QStringList jsonParser::get(QString selector, QString defaultValue)
{
QStringList result;
QStringList tokens = getSelectorTokens(selector);
QJsonObject root = jDoc.object();
state = OBJECT_STATE;
QJsonObject currentObject = root;
QJsonArray currentArray;
QJsonValue currentValue;
QList<QJsonObject> arrayObjects;
QList<QJsonValue> arrayValues;
foreach (const QString& token, tokens)
{
if (token == "")
continue;
if (token == ".")
{
if (state == VALUE_STATE)
{
currentObject = currentValue.toObject();
state = OBJECT_STATE;
}
else if (state == VALUES_ARRAY)
{
arrayObjects.clear();
for (int valIndex=0; valIndex<currentArray.count(); valIndex++)
arrayObjects.append(currentArray.at(valIndex).toObject());
state = OBJECTS_ARRAY;
}
else return result;
}
else if (token == "[")
{
if (state == VALUE_STATE)
{
currentArray = currentValue.toArray();
state = ARRAY_STATE;
}
else return result;
}
else if (token == "]")
{
if (state == ARRAY_STATE)
{
arrayValues.clear();
for (int valIndex=0; valIndex<currentArray.count(); valIndex++)
arrayValues.append(currentArray.at(valIndex));
state = VALUES_ARRAY;
}
else if (state == VALUE_STATE)
{
;
}
else return result;
}
else
{
bool isInt = false;
int index = token.toInt(&isInt);
if (state == ARRAY_STATE)
{
if (isInt && index>=0 && index < currentArray.count())
{
currentValue = currentArray.at(index);
state = VALUE_STATE;
}
}
else if (state == OBJECT_STATE)
{
currentValue = currentObject[token];
state = VALUE_STATE;
}
else if (state == OBJECTS_ARRAY)
{
for (int valIndex=0; valIndex<arrayObjects.count(); valIndex++)
arrayValues.append(arrayObjects.at(valIndex)[token]);
state = VALUES_ARRAY;
}
else return result;
}
}
switch (state)
{
case VALUE_STATE:
result.append(valueToString(currentValue, defaultValue));
break;
case VALUES_ARRAY:
for (int i=0; i<arrayValues.count(); ++i)
result.append(valueToString(arrayValues.at(i), defaultValue));
break;
default:
break;
}
return result;
}
int jsonParser::getInt(QString selector)
{
return get(selector, "-1").at(0).toInt();
}
bool jsonParser::getBool(QString selector)
{
return (get(selector, "false").at(0).toLower() == "true") ? true : false;
}
QString jsonParser::first(QString selector)
{
return get(selector).first();
}
QStringList jsonParser::getSelectorTokens(QString selector)
{
selector = selector.simplified().replace(" ","").replace("]", " ] ").replace("["," [ ").replace("."," . ").replace("["," [ ");
return selector.split(" ");
}
QString jsonParser::valueToString(QJsonValue value, QString defaultValue)
{
switch (value.type())
{
case QJsonValue::Bool:
if (value.toBool() == true)
return "true";
else return "false";
break;
case QJsonValue::Double:
return QString::number(value.toDouble());
break;
case QJsonValue::String:
return value.toString(defaultValue);
default:
return defaultValue;
}
}