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SettingsAccessor: Keep upgraders in a list instead of a map

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This also removes the need to store m_firstVersion and m_lastVersion.
Add some convenience functions for that.

The bool return value from addVersionUpgrader is never used in the
unit tests.

Change-Id: I2f372ef7353b72a0c577b429f725277d2c579872
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
This commit is contained in:
Tobias Hunger
2014-02-28 18:32:09 +01:00
parent 681963d5f2
commit b9338df474
2 changed files with 44 additions and 43 deletions
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79
src/plugins/projectexplorer/settingsaccessor.cpp
View File

@@ -446,16 +446,24 @@ public:
Utils::FileName path;
};
int firstVersion() const { return m_upgraders.isEmpty() ? -1 : m_upgraders.first()->version(); }
int lastVersion() const { return m_upgraders.isEmpty() ? -1 : m_upgraders.last()->version(); }
int currentVersion() const { return lastVersion() + 1; }
VersionUpgrader *upgrader(const int version) const
{
int pos = version - firstVersion();
if (pos >= 0 && pos < m_upgraders.count())
return m_upgraders.at(pos);
return 0;
}
Settings bestSettings(const SettingsAccessor *accessor, const QStringList &candidates) const;
QMap<int, Internal::VersionUpgrader *> m_upgraders;
QList<VersionUpgrader *> m_upgraders;
Utils::PersistentSettingsWriter *m_writer;
};
} // end namespace
SettingsAccessor::SettingsAccessor(Project *project) :
m_firstVersion(-1),
m_lastVersion(-1),
m_project(project),
d(new SettingsAccessorPrivate)
{
@@ -600,12 +608,13 @@ QVariantMap SettingsAccessor::upgradeSettings(const QVariantMap &data, int toVer
result = data;
if (version >= toVersion
|| version < m_firstVersion
|| toVersion > currentVersion())
|| version < d->firstVersion()
|| toVersion > d->currentVersion())
return result;
for (int i = version; i < toVersion; ++i) {
VersionUpgrader *upgrader = d->m_upgraders.value(i);
VersionUpgrader *upgrader = d->upgrader(i);
QTC_CHECK(upgrader && upgrader->version() == i);
result = upgrader->upgrade(result);
result = setVersionInMap(result, i + 1);
}
@@ -676,7 +685,7 @@ QByteArray SettingsAccessor::environmentIdFromMap(const QVariantMap &data)
QVariantMap SettingsAccessor::restoreSettings(QWidget *parent) const
{
if (m_lastVersion < 0)
if (d->lastVersion() < 0)
return QVariantMap();
QVariantMap userSettings = readUserSettings(parent);
@@ -711,41 +720,27 @@ bool SettingsAccessor::saveSettings(const QVariantMap &map, QWidget *parent) con
data.insert(i.key(), i.value());
}
data.insert(QLatin1String(VERSION_KEY), m_lastVersion + 1);
data.insert(QLatin1String(VERSION_KEY), d->currentVersion());
// for compatibility with QtC 3.1 and older:
data.insert(QLatin1String(OBSOLETE_VERSION_KEY), m_lastVersion + 1); // TODO: Move into UserfileAccessor!
data.insert(QLatin1String(OBSOLETE_VERSION_KEY), d->currentVersion()); // TODO: Move into UserfileAccessor!
data.insert(QLatin1String(ENVIRONMENT_ID_KEY), SettingsAccessor::creatorId());
return d->m_writer->save(data, parent);
}
void SettingsAccessor::addVersionUpgrader(VersionUpgrader *handler)
bool SettingsAccessor::addVersionUpgrader(VersionUpgrader *upgrader)
{
const int version(handler->version());
QTC_ASSERT(handler, return);
QTC_ASSERT(version >= 0, return);
QTC_ASSERT(!d->m_upgraders.contains(version), return);
QTC_ASSERT(d->m_upgraders.isEmpty() ||
(version == m_lastVersion + 1 || version == m_firstVersion - 1), return);
QTC_ASSERT(upgrader, return false);
int version = upgrader->version();
QTC_ASSERT(version >= 0, return false);
if (d->m_upgraders.isEmpty()) {
m_firstVersion = version;
m_lastVersion = version;
} else {
if (version < m_firstVersion)
m_firstVersion = version;
if (version > m_lastVersion)
m_lastVersion = version;
}
if (d->m_upgraders.isEmpty() || d->currentVersion() == version)
d->m_upgraders.append(upgrader);
else if (d->firstVersion() - 1 == version)
d->m_upgraders.prepend(upgrader);
else
QTC_ASSERT(false, return false); // Upgrader was added out of sequence or twice
d->m_upgraders.insert(version, handler);
// Postconditions:
Q_ASSERT(m_lastVersion >= 0);
Q_ASSERT(m_firstVersion >= 0);
Q_ASSERT(m_lastVersion >= m_firstVersion);
Q_ASSERT(d->m_upgraders.count() == m_lastVersion - m_firstVersion + 1);
for (int i = m_firstVersion; i < m_lastVersion; ++i)
Q_ASSERT(d->m_upgraders.contains(i));
return true;
}
/* Will always return the default name first */
@@ -781,7 +776,12 @@ QString SettingsAccessor::defaultFileName(const QString &suffix) const
int SettingsAccessor::currentVersion() const
{
return m_lastVersion + 1;
return d->currentVersion();
}
int SettingsAccessor::firstSupportedVersion() const
{
return d->firstVersion();
}
void SettingsAccessor::backupUserFile() const
@@ -800,8 +800,9 @@ void SettingsAccessor::backupUserFile() const
backupName += QLatin1String(".") + QString::fromLatin1(oldEnvironmentId).mid(1, 7);
const int oldVersion = versionFromMap(oldSettings.map);
if (oldVersion != currentVersion()) {
if (d->m_upgraders.contains(oldVersion))
backupName += QLatin1String(".") + d->m_upgraders.value(oldVersion)->backupExtension();
VersionUpgrader *upgrader = d->upgrader(oldVersion);
if (upgrader)
backupName += QLatin1String(".") + upgrader->backupExtension();
else
backupName += QLatin1String(".") + QString::number(oldVersion);
}
@@ -925,7 +926,7 @@ SettingsAccessorPrivate::Settings SettingsAccessorPrivate::bestSettings(const Se
qWarning() << "Skipping settings file" << tmp.path.toUserOutput() << "(too new).";
continue;
}
if (tmpVersion < accessor->m_firstVersion) {
if (tmpVersion < accessor->firstSupportedVersion()) {
qWarning() << "Skipping settings file" << tmp.path.toUserOutput() << "(too old).";
continue;
}
@@ -938,7 +939,7 @@ SettingsAccessorPrivate::Settings SettingsAccessorPrivate::bestSettings(const Se
if (tmpVersion > SettingsAccessor::versionFromMap(newestNonMatching.map))
newestNonMatching = tmp;
}
if (SettingsAccessor::versionFromMap(newestMatching.map) == accessor->m_lastVersion + 1)
if (SettingsAccessor::versionFromMap(newestMatching.map) == accessor->currentVersion())
break;
}

8
src/plugins/projectexplorer/settingsaccessor.h
View File

@@ -60,7 +60,10 @@ public:
static int originalVersionFromMap(const QVariantMap &data);
static QVariantMap setOriginalVersionInMap(const QVariantMap &data, int version);
void addVersionUpgrader(Internal::VersionUpgrader *handler); // Takes ownership of the handler!
int currentVersion() const;
int firstSupportedVersion() const;
bool addVersionUpgrader(Internal::VersionUpgrader *upgrader); // takes ownership of upgrader
protected:
QVariantMap readFile(const Utils::FileName &path) const;
@@ -71,7 +74,6 @@ private:
QStringList findSettingsFiles(const QString &suffix) const;
static QByteArray creatorId();
QString defaultFileName(const QString &suffix) const;
int currentVersion() const;
void backupUserFile() const;
QVariantMap readUserSettings(QWidget *parent) const;
@@ -80,8 +82,6 @@ private:
static QByteArray environmentIdFromMap(const QVariantMap &data);
int m_firstVersion;
int m_lastVersion;
QString m_userSuffix;
QString m_sharedSuffix;