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/*
* Copyright (C) 2014 Aaron Seigo <aseigo@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "dataset.h"
#include <QDateTime>
#include <QDebug>
#include <iostream>
namespace HAWD
{
static const QString s_annotationKey("__annotation__");
Dataset::Row::Row(const Row &other)
: m_key(other.m_key),
m_columns(other.m_columns),
m_data(other.m_data),
m_dataset(other.m_dataset)
{
}
Dataset::Row::Row(const Dataset &dataset, qint64 key)
: m_key(key),
m_columns(dataset.definition().columns()),
m_dataset(&dataset)
{
// TODO: pre-populate m_data, or do that on buffer creation?
QHashIterator<QString, DataDefinition> it(dataset.definition().columns());
while (it.hasNext()) {
it.next();
m_data.insert(it.key(), QVariant());
}
}
Dataset::Row &Dataset::Row::operator=(const Row &rhs)
{
m_key = rhs.m_key;
m_columns = rhs.m_columns;
m_data = rhs.m_data;
m_dataset = rhs.m_dataset;
return *this;
}
void Dataset::Row::setValue(const QString &column, const QVariant &value)
{
if (!m_columns.contains(column) || !value.canConvert(m_columns[column].type())) {
return;
}
m_data[column] = value;
}
void Dataset::Row::annotate(const QString ¬e)
{
m_annotation = note;
}
qint64 Dataset::Row::key() const
{
if (m_key < 1) {
const_cast<Dataset::Row *>(this)->m_key = QDateTime::currentMSecsSinceEpoch();
}
return m_key;
}
void Dataset::Row::fromBinary(QByteArray &data)
{
QVariant value;
QString key;
QDataStream stream(&data, QIODevice::ReadOnly);
while (!stream.atEnd()) {
stream >> key >> value;
if (key == s_annotationKey) {
m_annotation = value.toString();
} else {
setValue(key, value);
}
}
}
QByteArray Dataset::Row::toBinary() const
{
QByteArray data;
QDataStream stream(&data, QIODevice::WriteOnly);
QHashIterator<QString, QVariant> it(m_data);
while (it.hasNext()) {
it.next();
stream << it.key() << it.value();
}
if (!m_annotation.isEmpty()) {
stream << s_annotationKey << m_annotation;
}
return data;
}
QString Dataset::Row::toString() const
{
if (m_data.isEmpty()) {
return QString();
}
QString string;
QHashIterator<QString, QVariant> it(m_data);
while (it.hasNext()) {
it.next();
string.append('\t').append(it.value().toString());
}
if (!m_annotation.isEmpty()) {
string.append('\t').append(m_annotation);
}
return string;
}
Dataset::Dataset(const QString &name, const State &state)
: m_definition(state.datasetDefinition(name)),
m_storage(state.resultsPath(), m_definition.name(), Storage::ReadWrite)
{
//TODO: it should use a different file name if the data columns have changed
m_storage.startTransaction();
}
Dataset::~Dataset()
{
m_storage.commitTransaction();
}
bool Dataset::isValid()
{
return m_definition.isValid();
}
const DatasetDefinition &Dataset::definition() const
{
return m_definition;
}
qint64 Dataset::insertRow(const Row &row)
{
if (row.m_dataset != this) {
return 0;
}
qint64 key = row.key();
QByteArray data = row.toBinary();
m_storage.write((const char *)&key, sizeof(qint64), data.constData(), data.size());
return key;
}
void Dataset::removeRow(const Row &row)
{
//TODO
}
Dataset::Row Dataset::row(qint64 key)
{
if (key < 1) {
return Row(*this);
}
Row row(*this, key);
m_storage.read((const char *)&key, sizeof(qint64),
[&row](void *ptr, int size) -> bool {
QByteArray array((const char*)ptr, size);
row.fromBinary(array);
return true;
},
Storage::basicErrorHandler()
);
return row;
}
Dataset::Row Dataset::lastRow()
{
//TODO
return Row(*this);
}
} // namespace HAWD
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