5251bf3a
 Steven de Ridder
Initial commit. d...
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/* ****************************************************************************
* Copyright 2019 Open Systems Development BV *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
* DEALINGS IN THE SOFTWARE. *
* ***************************************************************************/
#include "ormbatchchange.h"
#include "log.h"
#include <algorithm>
using namespace osdev::components;
OrmBatchChange::OrmBatchChange()
: m_changeTimestamp()
, m_foreignId()
, m_changeSet()
, m_valid(false)
{
}
OrmBatchChange::OrmBatchChange(const Timestamp& ts, const QVariant& _foreignId, const std::set<QVariant>& _changeSet)
: m_changeTimestamp(ts)
, m_foreignId(_foreignId)
, m_changeSet(_changeSet)
, m_valid(!_foreignId.isNull() && ts.valid())
{
if (!m_valid)
{
LogInfo("[OrmBatchChange ctor]", QString("Change is invalid : Timestamp %1, foreignId::isNull %2").arg(m_changeTimestamp.toString()).arg(m_foreignId.isNull()));
}
}
bool OrmBatchChange::processChange(const OrmBatchChange& change, bool exclusiveUpdate)
{
LogDebug("[OrmBatchChange::processChange]", QString("Check %1 against change with timestamp %2, exlusiveUpdate is %3")
.arg(m_changeTimestamp.toString())
.arg(change.timestamp().toString())
.arg(exclusiveUpdate));
if (!m_valid)
{
LogInfo("[OrmBatchChange::processChange]", "Incoming change is invalid");
return false; // This is an invalid change and can never become valid so signal to stop processing.
}
if (*this < change)
{
if (exclusiveUpdate && (change.m_foreignId == m_foreignId))
{
// this change is not necessary because it is already superseded. Invalidate it and signal to stop processing.
LogInfo("[OrmBatchChange::processChange]", "Change is superseded by newer change");
m_valid = false;
return false;
}
// Find the items that are in the incoming change but not in the already applied change that we are checking against.
// These items still need to change w.r.t to this change.
if (!m_changeSet.empty())
{
std::set<QVariant> result;
std::set_difference(m_changeSet.begin(), m_changeSet.end(), change.m_changeSet.begin(), change.m_changeSet.end(), std::inserter(result, result.begin()));
m_changeSet.swap(result);
}
// If the changeset is empty and the update is not exclusive then nothing has to be done.
// In case of an exclusive update an empty set means that none of the items can point to the given foreignId
// and processing needs to be continued.
if (!exclusiveUpdate && m_changeSet.empty())
{
// Invalidate the incoming change and signal to stop processing.
LogInfo("[OrmBatchChange::processChange]", "Nothing to do for non exclusive update");
m_valid = false;
return false;
}
}
return true;
}
// static
std::set<QVariant> OrmBatchChange::toSet(const QList<QVariant>& lst)
{
std::set<QVariant> result;
for (const auto& item : lst)
{
result.insert(item);
}
return result;
}
// static
QList<QVariant> OrmBatchChange::toList(const std::set<QVariant>& s)
{
QList<QVariant> result;
for (const auto& item : s)
{
result.push_back(item);
}
return result;
}
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