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/*
* Copyright (C) 2008 Nokia Corporation.
*
* Contact: Marius Vollmer <marius.vollmer@nokia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include "contextregistryinfo.h"
#include "infobackend.h"
#include "sconnect.h"
#include "logging.h"
#include "loggingfeatures.h"
#include "contextproviderinfo.h"
#include <QMutex>
#include <QMutexLocker>
#include <QCoreApplication>
/*!
\class ContextRegistryInfo
\brief A class to introspect the registry contents.
This is a singelton class used to obtain information about the keys (properties)
in the registry database. The information can be provided either from xml files
or from a cdb database. It's possible to list all the keys in the registry and
also list all keys belonging to a one particular provider.
*/
ContextRegistryInfo* ContextRegistryInfo::registryInstance = NULL;
/* Public */
/// Returns the singleton instance of the ContextRegistryInfo. The object
/// is constructed automaticall on first access.
/// \param backendName the optional name of the backend to use (force).
ContextRegistryInfo* ContextRegistryInfo::instance(const QString &backendName)
{
static QMutex mutex;
QMutexLocker locker(&mutex);
if (! registryInstance) {
InfoBackend::instance(backendName);
registryInstance = new ContextRegistryInfo;
InfoBackend* infoBackend = InfoBackend::instance();
sconnect(infoBackend, SIGNAL(keysChanged(QStringList)),
registryInstance, SLOT(onKeysChanged(QStringList)));
sconnect(infoBackend, SIGNAL(keysAdded(QStringList)),
registryInstance, SLOT(onKeysAdded(QStringList)));
sconnect(infoBackend, SIGNAL(keysRemoved(QStringList)),
registryInstance, SLOT(onKeysRemoved(QStringList)));
sconnect(infoBackend, SIGNAL(listChanged()),
registryInstance, SLOT(onListChanged()));
// Move the backend to the main thread
registryInstance->moveToThread(QCoreApplication::instance()->thread());
}
return registryInstance;
}
/// Returns the list of all the keys currently availible in the registry.
QStringList ContextRegistryInfo::listKeys() const
{
return InfoBackend::instance()->listKeys();
}
/// Returns the list of all the keys associated with the given provider.
QStringList ContextRegistryInfo::listKeys(QString providerName) const
{
contextWarning() << F_DEPRECATION << "ContextRegistryInfo::listKeys(QString provider) is deprecated.";
QSet<QString> keys;
Q_FOREACH (QString key, listKeys()) {
Q_FOREACH (ContextProviderInfo info, InfoBackend::instance()->providersForKey(key)) {
if (info.plugin == "contextkit-dbus" &&
info.constructionString.split(":").last() == providerName) {
keys.insert(key);
}
}
}
return keys.toList();
}
/// DEPRECATED Returns the list of all the keys associated with the given plugin.
QStringList ContextRegistryInfo::listKeysForPlugin(QString plugin) const
{
contextWarning() << F_DEPRECATION << "ContextRegistryInfo::listKeysForPlugin() is deprecated.";
QSet<QString> keys;
Q_FOREACH (QString key, listKeys()) {
Q_FOREACH (ContextProviderInfo info, InfoBackend::instance()->providersForKey(key)) {
if (info.plugin == plugin) {
keys.insert(key);
}
}
}
return keys.toList();
}
/// DEPRECATED Returns the list of all unique providers in the registry.
/// The lists consist of strings with dbus names of the providers.
QStringList ContextRegistryInfo::listProviders() const
{
contextWarning() << F_DEPRECATION << "ContextRegistryInfo::listProviders() is deprecated.";
QSet<QString> providers;
Q_FOREACH (QString key, listKeys()) {
Q_FOREACH (ContextProviderInfo info, InfoBackend::instance()->providersForKey(key)) {
if (info.plugin == "contextkit-dbus") {
providers.insert(info.constructionString.split(":").last());
}
}
}
return providers.toList();
}
/// DEPRECATED Returns the list of all unique plugins in the registry.
QStringList ContextRegistryInfo::listPlugins() const
{
contextWarning() << F_DEPRECATION << "ContextRegistryInfo::listPlugins() is deprecated.";
QSet<QString> plugins;
Q_FOREACH (QString key, listKeys()) {
Q_FOREACH (ContextProviderInfo info, InfoBackend::instance()->providersForKey(key)) {
plugins.insert(info.plugin);
}
}
return plugins.toList();
}
/// Returns the name of the currently used registry backend. Ie. "cdb" or "xml".
QString ContextRegistryInfo::backendName() const
{
return InfoBackend::instance()->name();
}
/* Slots */
/// This is connected to the \a keysChanged of the actual info backend instance.
/// Will be removed when deprecated keysChanged() signal is removed.
void ContextRegistryInfo::onKeysChanged(const QStringList& currentKeys)
{
Q_EMIT keysChanged(currentKeys);
}
/// This is connected to the \a keysAdded of the actual info backend instance.
/// Will be removed when deprecated keysAdded() signal is removed.
void ContextRegistryInfo::onKeysAdded(const QStringList& newKeys)
{
Q_EMIT keysAdded(newKeys);
}
/// This is connected to the \a keysRemoved of the actual info backend instance.
/// Will be removed when deprecated keysRemoved() signal is removed.
void ContextRegistryInfo::onKeysRemoved(const QStringList& removedKeys)
{
Q_EMIT keysRemoved(removedKeys);
}
/// Called when people connect to signals. Used to emit deprecation warnings
/// when people connect to deprecated signals.
void ContextRegistryInfo::connectNotify(const char *signal)
{
QObject::connectNotify(signal);
if (signal == SIGNAL(keysChanged(QStringList)))
contextWarning() << F_DEPRECATION << "ContextRegistryInfo::keysChanged signal is deprecated.";
else if (signal == SIGNAL(keysAdded(QStringList)))
contextWarning() << F_DEPRECATION << "ContextRegistryInfo::keysAdded signal is deprecated.";
else if (signal == SIGNAL(keysRemoved(QStringList)))
contextWarning() << F_DEPRECATION << "ContextRegistryInfo::keysRemoved signal is deprecated.";
}
/// This is connected to the \a listChanged of the actual info backend instance.
/// Gets called when the list of keys changes.
void ContextRegistryInfo::onListChanged()
{
Q_EMIT changed();
}
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