Add geocoding support to OSM plugin.

Supports:
  * geocoding
  * reverse geocoding
  * locale results

Change-Id: I1e7f5b5013e3ca56b7abe92d97c8cebc34c21cdd
Reviewed-by: Alex <ablasche@gmail.com>

7 files changed, 527 insertions, 8 deletions

diff --git a/src/plugins/geoservices/osm/osm.pro b/src/plugins/geoservices/osm/osm.pro
index ea26a964..96b51068 100644
--- a/src/plugins/geoservices/osm/osm.pro
+++ b/src/plugins/geoservices/osm/osm.pro
@@ -8,13 +8,17 @@ HEADERS += \
     qgeoserviceproviderpluginosm.h \
     qgeotiledmappingmanagerengineosm.h \
     qgeotilefetcherosm.h \
-    qgeomapreplyosm.h
+    qgeomapreplyosm.h \
+    qgeocodingmanagerengineosm.h \
+    qgeocodereplyosm.h
 
 SOURCES += \
     qgeoserviceproviderpluginosm.cpp \
     qgeotiledmappingmanagerengineosm.cpp \
     qgeotilefetcherosm.cpp \
-    qgeomapreplyosm.cpp
+    qgeomapreplyosm.cpp \
+    qgeocodingmanagerengineosm.cpp \
+    qgeocodereplyosm.cpp
 
 OTHER_FILES += \
     osm_plugin.json
diff --git a/src/plugins/geoservices/osm/osm_plugin.json b/src/plugins/geoservices/osm/osm_plugin.json
index 690140a4..f004d8b7 100644
--- a/src/plugins/geoservices/osm/osm_plugin.json
+++ b/src/plugins/geoservices/osm/osm_plugin.json
@@ -4,6 +4,8 @@
     "Version": 100,
     "Experimental": false,
     "Features": [
-        "OnlineMappingFeature"
+        "OnlineMappingFeature",
+        "OnlineGeocodingFeature",
+        "ReverseGeocodingFeature"
     ]
 }
diff --git a/src/plugins/geoservices/osm/qgeocodereplyosm.cpp b/src/plugins/geoservices/osm/qgeocodereplyosm.cpp
new file mode 100644
index 00000000..dfb656dd
--- /dev/null
+++ b/src/plugins/geoservices/osm/qgeocodereplyosm.cpp
@@ -0,0 +1,189 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Aaron McCarthy <mccarthy.aaron@gmail.com>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtLocation module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgeocodereplyosm.h"
+
+#include <QtCore/QJsonDocument>
+#include <QtCore/QJsonObject>
+#include <QtCore/QJsonArray>
+#include <QtLocation/QGeoCoordinate>
+#include <QtLocation/QGeoAddress>
+#include <QtLocation/QGeoLocation>
+#include <QtLocation/QGeoRectangle>
+
+QT_BEGIN_NAMESPACE
+
+QGeocodeReplyOsm::QGeocodeReplyOsm(QNetworkReply *reply, QObject *parent)
+:   QGeocodeReply(parent), m_reply(reply)
+{
+    connect(m_reply, SIGNAL(finished()), this, SLOT(networkReplyFinished()));
+    connect(m_reply, SIGNAL(error(QNetworkReply::NetworkError)),
+            this, SLOT(networkReplyError(QNetworkReply::NetworkError)));
+
+    setLimit(1);
+    setOffset(0);
+}
+
+QGeocodeReplyOsm::~QGeocodeReplyOsm()
+{
+    if (m_reply)
+        m_reply->deleteLater();
+}
+
+void QGeocodeReplyOsm::abort()
+{
+    if (!m_reply)
+        return;
+
+    m_reply->abort();
+
+    m_reply->deleteLater();
+    m_reply = 0;
+}
+
+void QGeocodeReplyOsm::networkReplyFinished()
+{
+    if (!m_reply)
+        return;
+
+    if (m_reply->error() != QNetworkReply::NoError)
+        return;
+
+    QJsonDocument document = QJsonDocument::fromJson(m_reply->readAll());
+
+    if (document.isObject()) {
+        QJsonObject object = document.object();
+
+        QGeoCoordinate coordinate;
+
+        coordinate.setLatitude(object.value(QStringLiteral("lat")).toString().toDouble());
+        coordinate.setLongitude(object.value(QStringLiteral("lon")).toString().toDouble());
+
+        QJsonObject ao = object.value(QStringLiteral("address")).toObject();
+
+        QGeoAddress address;
+        address.setText(object.value(QStringLiteral("display_name")).toString());
+        address.setCountry(ao.value(QStringLiteral("country")).toString());
+        address.setCountryCode(ao.value(QStringLiteral("country_code")).toString());
+        address.setState(ao.value(QStringLiteral("state")).toString());
+        address.setCity(ao.value(QStringLiteral("city")).toString());
+        address.setDistrict(ao.value(QStringLiteral("suburb")).toString());
+        address.setPostalCode(ao.value(QStringLiteral("postcode")).toString());
+        address.setStreet(ao.value(QStringLiteral("road")).toString());
+
+        QGeoLocation location;
+        location.setCoordinate(coordinate);
+        location.setAddress(address);
+
+        QList<QGeoLocation> locations;
+        locations.append(location);
+
+        setLocations(locations);
+        setFinished(true);
+    } else if (document.isArray()) {
+        QJsonArray results = document.array();
+
+        QList<QGeoLocation> locations;
+
+        for (int i = 0; i < results.count(); ++i) {
+            if (!results.at(i).isObject())
+                continue;
+
+            QJsonObject object = results.at(i).toObject();
+
+            QGeoCoordinate coordinate;
+
+            coordinate.setLatitude(object.value(QStringLiteral("lat")).toString().toDouble());
+            coordinate.setLongitude(object.value(QStringLiteral("lon")).toString().toDouble());
+
+            QGeoRectangle rectangle;
+
+            if (object.contains(QStringLiteral("boundingbox"))) {
+                QJsonArray a = object.value(QStringLiteral("boundingbox")).toArray();
+                if (a.count() == 4) {
+                    rectangle.setTopLeft(QGeoCoordinate(a.at(1).toString().toDouble(),
+                                                        a.at(2).toString().toDouble()));
+                    rectangle.setBottomRight(QGeoCoordinate(a.at(0).toString().toDouble(),
+                                                            a.at(3).toString().toDouble()));
+                }
+            }
+
+            QJsonObject ao = object.value(QStringLiteral("address")).toObject();
+
+            QGeoAddress address;
+            address.setText(object.value(QStringLiteral("display_name")).toString());
+            address.setCountry(ao.value(QStringLiteral("country")).toString());
+            address.setCountryCode(ao.value(QStringLiteral("country_code")).toString());
+            address.setState(ao.value(QStringLiteral("state")).toString());
+            address.setCity(ao.value(QStringLiteral("city")).toString());
+            address.setDistrict(ao.value(QStringLiteral("suburb")).toString());
+            address.setPostalCode(ao.value(QStringLiteral("postcode")).toString());
+            address.setStreet(ao.value(QStringLiteral("road")).toString());
+
+            QGeoLocation location;
+            location.setCoordinate(coordinate);
+            location.setBoundingBox(rectangle);
+            location.setAddress(address);
+            locations.append(location);
+        }
+
+        setLocations(locations);
+        setFinished(true);
+    }
+
+    m_reply->deleteLater();
+    m_reply = 0;
+}
+
+void QGeocodeReplyOsm::networkReplyError(QNetworkReply::NetworkError error)
+{
+    Q_UNUSED(error)
+
+    if (!m_reply)
+        return;
+
+    setError(QGeocodeReply::CommunicationError, m_reply->errorString());
+
+    m_reply->deleteLater();
+    m_reply = 0;
+}
+
+QT_END_NAMESPACE
diff --git a/src/plugins/geoservices/osm/qgeocodereplyosm.h b/src/plugins/geoservices/osm/qgeocodereplyosm.h
new file mode 100644
index 00000000..669ee40d
--- /dev/null
+++ b/src/plugins/geoservices/osm/qgeocodereplyosm.h
@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Aaron McCarthy <mccarthy.aaron@gmail.com>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtLocation module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGEOCODEREPLYOSM_H
+#define QGEOCODEREPLYOSM_H
+
+#include <QtNetwork/QNetworkReply>
+#include <QtLocation/QGeocodeReply>
+
+QT_BEGIN_NAMESPACE
+
+class QGeocodeReplyOsm : public QGeocodeReply
+{
+    Q_OBJECT
+
+public:
+    explicit QGeocodeReplyOsm(QNetworkReply *reply, QObject *parent = 0);
+    ~QGeocodeReplyOsm();
+
+    void abort();
+
+private Q_SLOTS:
+    void networkReplyFinished();
+    void networkReplyError(QNetworkReply::NetworkError error);
+
+private:
+    QNetworkReply *m_reply;
+};
+
+QT_END_NAMESPACE
+
+#endif // QGEOCODEREPLYOSM_H
diff --git a/src/plugins/geoservices/osm/qgeocodingmanagerengineosm.cpp b/src/plugins/geoservices/osm/qgeocodingmanagerengineosm.cpp
new file mode 100644
index 00000000..4119329c
--- /dev/null
+++ b/src/plugins/geoservices/osm/qgeocodingmanagerengineosm.cpp
@@ -0,0 +1,179 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Aaron McCarthy <mccarthy.aaron@gmail.com>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtLocation module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgeocodingmanagerengineosm.h"
+#include "qgeocodereplyosm.h"
+
+#include <QtCore/QVariantMap>
+#include <QtCore/QUrl>
+#include <QtCore/QUrlQuery>
+#include <QtCore/QLocale>
+#include <QtNetwork/QNetworkAccessManager>
+#include <QtNetwork/QNetworkRequest>
+#include <QtLocation/QGeoCoordinate>
+#include <QtLocation/QGeoAddress>
+#include <QtLocation/QGeoShape>
+#include <QtLocation/QGeoRectangle>
+
+QT_BEGIN_NAMESPACE
+
+static QString addressToQuery(const QGeoAddress &address)
+{
+    return address.street() + QStringLiteral(", ") +
+           address.district() + QStringLiteral(", ") +
+           address.city() + QStringLiteral(", ") +
+           address.state() + QStringLiteral(", ") +
+           address.country();
+}
+
+static QString boundingBoxToLtrb(const QGeoRectangle &rect)
+{
+    return QString::number(rect.topLeft().longitude()) + QLatin1Char(',') +
+           QString::number(rect.topLeft().latitude()) + QLatin1Char(',') +
+           QString::number(rect.bottomRight().longitude()) + QLatin1Char(',') +
+           QString::number(rect.bottomRight().latitude());
+}
+
+QGeocodingManagerEngineOsm::QGeocodingManagerEngineOsm(const QVariantMap &parameters,
+                                                       QGeoServiceProvider::Error *error,
+                                                       QString *errorString)
+:   QGeocodingManagerEngine(parameters), m_networkManager(new QNetworkAccessManager(this))
+{
+    if (parameters.contains(QStringLiteral("useragent")))
+        m_userAgent = parameters.value(QStringLiteral("useragent")).toString().toLatin1();
+    else
+        m_userAgent = "Qt Location based application";
+
+    *error = QGeoServiceProvider::NoError;
+    errorString->clear();
+}
+
+QGeocodingManagerEngineOsm::~QGeocodingManagerEngineOsm()
+{
+}
+
+QGeocodeReply *QGeocodingManagerEngineOsm::geocode(const QGeoAddress &address, const QGeoShape &bounds)
+{
+    return geocode(address, -1, -1, bounds);
+}
+
+QGeocodeReply *QGeocodingManagerEngineOsm::geocode(const QGeoAddress &address, int limit, int offset, const QGeoShape &bounds)
+{
+    Q_UNUSED(offset)
+
+    QNetworkRequest request;
+    request.setRawHeader("User-Agent", m_userAgent);
+
+    QUrl url(QStringLiteral("http://nominatim.openstreetmap.org/search"));
+    QUrlQuery query;
+    query.addQueryItem(QStringLiteral("q"), addressToQuery(address));
+    query.addQueryItem(QStringLiteral("format"), QStringLiteral("json"));
+    query.addQueryItem(QStringLiteral("accept-language"), locale().name().left(2));
+    //query.addQueryItem(QStringLiteral("countrycodes"), QStringLiteral("au,jp"));
+    if (bounds.type() == QGeoShape::RectangleType) {
+        query.addQueryItem(QStringLiteral("viewbox"), boundingBoxToLtrb(bounds));
+        query.addQueryItem(QStringLiteral("bounded"), QStringLiteral("1"));
+    }
+    query.addQueryItem(QStringLiteral("polygon"), QStringLiteral("1"));
+    query.addQueryItem(QStringLiteral("addressdetails"), QStringLiteral("1"));
+    if (limit != -1)
+        query.addQueryItem(QStringLiteral("limit"), QString::number(limit));
+
+    url.setQuery(query);
+    request.setUrl(url);
+
+    QNetworkReply *reply = m_networkManager->get(request);
+
+    QGeocodeReplyOsm *geocodeReply = new QGeocodeReplyOsm(reply, this);
+
+    connect(geocodeReply, SIGNAL(finished()), this, SLOT(replyFinished()));
+    connect(geocodeReply, SIGNAL(error(QGeocodeReply::Error,QString)),
+            this, SLOT(replyError(QGeocodeReply::Error,QString)));
+
+    return geocodeReply;
+}
+
+QGeocodeReply *QGeocodingManagerEngineOsm::reverseGeocode(const QGeoCoordinate &coordinate,
+                                                          const QGeoShape &bounds)
+{
+    Q_UNUSED(bounds)
+
+    QNetworkRequest request;
+    request.setRawHeader("User-Agent", m_userAgent);
+
+    QUrl url(QStringLiteral("http://nominatim.openstreetmap.org/reverse"));
+    QUrlQuery query;
+    query.addQueryItem(QStringLiteral("format"), QStringLiteral("json"));
+    query.addQueryItem(QStringLiteral("accept-language"), locale().name().left(2));
+    query.addQueryItem(QStringLiteral("lat"), QString::number(coordinate.latitude()));
+    query.addQueryItem(QStringLiteral("lon"), QString::number(coordinate.longitude()));
+    query.addQueryItem(QStringLiteral("zoom"), QStringLiteral("18"));
+    query.addQueryItem(QStringLiteral("addressdetails"), QStringLiteral("1"));
+
+    url.setQuery(query);
+    request.setUrl(url);
+
+    QNetworkReply *reply = m_networkManager->get(request);
+
+    QGeocodeReplyOsm *geocodeReply = new QGeocodeReplyOsm(reply, this);
+
+    connect(geocodeReply, SIGNAL(finished()), this, SLOT(replyFinished()));
+    connect(geocodeReply, SIGNAL(error(QGeocodeReply::Error,QString)),
+            this, SLOT(replyError(QGeocodeReply::Error,QString)));
+
+    return geocodeReply;
+}
+
+void QGeocodingManagerEngineOsm::replyFinished()
+{
+    QGeocodeReply *reply = qobject_cast<QGeocodeReply *>(sender());
+    if (reply)
+        emit finished(reply);
+}
+
+void QGeocodingManagerEngineOsm::replyError(QGeocodeReply::Error errorCode, const QString &errorString)
+{
+    QGeocodeReply *reply = qobject_cast<QGeocodeReply *>(sender());
+    if (reply)
+        emit error(reply, errorCode, errorString);
+}
+
+QT_END_NAMESPACE
diff --git a/src/plugins/geoservices/osm/qgeocodingmanagerengineosm.h b/src/plugins/geoservices/osm/qgeocodingmanagerengineosm.h
new file mode 100644
index 00000000..0794cced
--- /dev/null
+++ b/src/plugins/geoservices/osm/qgeocodingmanagerengineosm.h
@@ -0,0 +1,78 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Aaron McCarthy <mccarthy.aaron@gmail.com>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtLocation module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGEOCODINGMANAGERENGINEOSM_H
+#define QGEOCODINGMANAGERENGINEOSM_H
+
+#include <QtLocation/QGeoServiceProvider>
+#include <QtLocation/QGeocodingManagerEngine>
+#include <QtLocation/QGeocodeReply>
+
+QT_BEGIN_NAMESPACE
+
+class QNetworkAccessManager;
+
+class QGeocodingManagerEngineOsm : public QGeocodingManagerEngine
+{
+    Q_OBJECT
+
+public:
+    QGeocodingManagerEngineOsm(const QVariantMap &parameters, QGeoServiceProvider::Error *error,
+                               QString *errorString);
+    ~QGeocodingManagerEngineOsm();
+
+    QGeocodeReply *geocode(const QGeoAddress &address, const QGeoShape &bounds);
+    QGeocodeReply *geocode(const QGeoAddress &address, int limit, int offset,
+                           const QGeoShape &bounds);
+    QGeocodeReply *reverseGeocode(const QGeoCoordinate &coordinate, const QGeoShape &bounds);
+
+private Q_SLOTS:
+    void replyFinished();
+    void replyError(QGeocodeReply::Error errorCode, const QString &errorString);
+
+private:
+    QNetworkAccessManager *m_networkManager;
+    QByteArray m_userAgent;
+};
+
+QT_END_NAMESPACE
+
+#endif // QGEOCODINGMANAGERENGINEOSM_H
diff --git a/src/plugins/geoservices/osm/qgeoserviceproviderpluginosm.cpp b/src/plugins/geoservices/osm/qgeoserviceproviderpluginosm.cpp
index 3ee87bb8..e3087c40 100644
--- a/src/plugins/geoservices/osm/qgeoserviceproviderpluginosm.cpp
+++ b/src/plugins/geoservices/osm/qgeoserviceproviderpluginosm.cpp
@@ -41,6 +41,7 @@
 
 #include "qgeoserviceproviderpluginosm.h"
 #include "qgeotiledmappingmanagerengineosm.h"
+#include "qgeocodingmanagerengineosm.h"
 
 #include <QtLocation/private/qgeotiledmappingmanagerengine_p.h>
 
@@ -49,11 +50,7 @@ QT_BEGIN_NAMESPACE
 QGeocodingManagerEngine *QGeoServiceProviderFactoryOsm::createGeocodingManagerEngine(
     const QVariantMap &parameters, QGeoServiceProvider::Error *error, QString *errorString) const
 {
-    Q_UNUSED(parameters)
-    Q_UNUSED(error)
-    Q_UNUSED(errorString)
-
-    return 0;
+    return new QGeocodingManagerEngineOsm(parameters, error, errorString);
 }
 
 QGeoMappingManagerEngine *QGeoServiceProviderFactoryOsm::createMappingManagerEngine(