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Added JNI convenience classes in QtPlatformSupport.

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This is used for Android.

Change-Id: I049138c140a472b1721390cf4ec2bd88bbe9c471
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
This commit is contained in:
Yoann Lopes 2013-03-01 18:32:49 +01:00 committed by The Qt Project
parent d28f454a67
commit 0666975d6c
6 changed files with 3583 additions and 0 deletions
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9
src/platformsupport/jniconvenience/jniconvenience.pri Normal file
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android {
QT += gui-private
HEADERS += $$PWD/qjnihelpers_p.h \
$$PWD/qjniobject_p.h
SOURCES += $$PWD/qjnihelpers.cpp \
$$PWD/qjniobject.cpp
}

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src/platformsupport/jniconvenience/qjnihelpers.cpp Normal file
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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part 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 "qjnihelpers_p.h"
#include <qpa/qplatformnativeinterface.h>
#include <qguiapplication.h>
QT_BEGIN_NAMESPACE
QString qt_convertJString(jstring string)
{
QAttachedJNIEnv env;
int strLength = env->GetStringLength(string);
QString res;
res.resize(strLength);
env->GetStringRegion(string, 0, strLength, (jchar*)res.utf16());
return res;
}
QJNILocalRef<jstring> qt_toJString(const QString &string)
{
QAttachedJNIEnv env;
return QJNILocalRef<jstring>(env->NewString(reinterpret_cast<const jchar*>(string.constData()),
string.length()));
}
static JavaVM *g_javaVM = 0;
static JavaVM *getJavaVM()
{
if (!g_javaVM){
QPlatformNativeInterface *nativeInterface = QGuiApplication::platformNativeInterface();
g_javaVM = static_cast<JavaVM*>(nativeInterface->nativeResourceForIntegration("JavaVM"));
}
return g_javaVM;
}
QThreadStorage<int> QAttachedJNIEnv::m_refCount;
QAttachedJNIEnv::QAttachedJNIEnv()
{
JavaVM *vm = javaVM();
if (vm->GetEnv((void**)&jniEnv, JNI_VERSION_1_6) == JNI_EDETACHED) {
if (vm->AttachCurrentThread(&jniEnv, 0) < 0) {
jniEnv = 0;
return;
}
}
if (!m_refCount.hasLocalData())
m_refCount.setLocalData(1);
else
m_refCount.setLocalData(m_refCount.localData() + 1);
}
QAttachedJNIEnv::~QAttachedJNIEnv()
{
if (!jniEnv)
return;
int newRef = m_refCount.localData() - 1;
m_refCount.setLocalData(newRef);
if (newRef == 0)
javaVM()->DetachCurrentThread();
jniEnv = 0;
}
JavaVM *QAttachedJNIEnv::javaVM()
{
return getJavaVM();
}
QT_END_NAMESPACE

191
src/platformsupport/jniconvenience/qjnihelpers_p.h Normal file
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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part 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 QJNIHELPERS_H
#define QJNIHELPERS_H
#include <jni.h>
#include <qglobal.h>
#include <QString>
#include <QThreadStorage>
QT_BEGIN_NAMESPACE
template <typename T>
class QJNILocalRef;
QString qt_convertJString(jstring string);
QJNILocalRef<jstring> qt_toJString(const QString &string);
struct QAttachedJNIEnv
{
QAttachedJNIEnv();
~QAttachedJNIEnv();
static JavaVM *javaVM();
JNIEnv *operator->()
{
return jniEnv;
}
operator JNIEnv*() const
{
return jniEnv;
}
JNIEnv *jniEnv;
private:
static QThreadStorage<int> m_refCount;
};
template <typename T>
class QJNILocalRef
{
public:
inline QJNILocalRef() : m_obj(0) { }
inline explicit QJNILocalRef(T o) : m_obj(o) { }
inline QJNILocalRef(const QJNILocalRef<T> &other) : m_obj(other.m_obj)
{
if (other.m_obj)
m_obj = static_cast<T>(m_env->NewLocalRef(other.m_obj));
}
template <typename X>
inline QJNILocalRef(const QJNILocalRef<X> &other) : m_obj(other.m_obj)
{
if (other.m_obj)
m_obj = static_cast<T>(m_env->NewLocalRef(other.m_obj));
}
inline ~QJNILocalRef() { release(); }
inline QJNILocalRef<T> &operator=(const QJNILocalRef<T> &other)
{
release();
m_obj = other.m_obj; // for type checking
if (other.m_obj)
m_obj = static_cast<T>(m_env->NewLocalRef(other.m_obj));
return *this;
}
template <typename X>
inline QJNILocalRef<T> &operator=(const QJNILocalRef<X> &other)
{
release();
m_obj = other.m_obj; // for type checking
if (other.m_obj)
m_obj = static_cast<T>(m_env->NewLocalRef(other.m_obj));
return *this;
}
inline QJNILocalRef<T> &operator=(T o)
{
release();
m_obj = o;
return *this;
}
template <typename X>
inline QJNILocalRef<T> &operator=(X o)
{
release();
m_obj = o;
return *this;
}
inline bool operator !() const { return !m_obj; }
inline bool isNull() const { return !m_obj; }
inline T object() const { return m_obj; }
private:
void release()
{
if (m_obj) {
m_env->DeleteLocalRef(m_obj);
m_obj = 0;
}
}
QAttachedJNIEnv m_env;
T m_obj;
template <class X> friend class QJNILocalRef;
};
template <class T, class X>
bool operator==(const QJNILocalRef<T> &ptr1, const QJNILocalRef<X> &ptr2)
{
return ptr1.m_obj == ptr2.m_obj;
}
template <class T, class X>
bool operator!=(const QJNILocalRef<T> &ptr1, const QJNILocalRef<X> &ptr2)
{
return ptr1.m_obj != ptr2.m_obj;
}
template <class T, class X>
bool operator==(const QJNILocalRef<T> &ptr1, X ptr2)
{
return ptr1.m_obj == ptr2;
}
template <class T, class X>
bool operator==(T ptr1, const QJNILocalRef<X> &ptr2)
{
return ptr1 == ptr2.m_obj;
}
template <class T, class X>
bool operator!=(const QJNILocalRef<T> &ptr1, X ptr2)
{
return !(ptr1 == ptr2);
}
template <class T, class X>
bool operator!=(const T *ptr1, const QJNILocalRef<X> &ptr2)
{
return !(ptr2 == ptr1);
}
QT_END_NAMESPACE
#endif // QJNIHELPERS_H

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src/platformsupport/jniconvenience/qjniobject.cpp Normal file
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src/platformsupport/jniconvenience/qjniobject_p.h Normal file
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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part 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 QJNIOBJECT_H
#define QJNIOBJECT_H
#include <qglobal.h>
#include <jni.h>
QT_BEGIN_NAMESPACE
template <typename T>
class QJNILocalRef;
/**
* Allows to wrap any Java class and partially hide some of the jni calls.
*
* Usage example:
*
* QJNIObject javaString("java/lang/String");
* jchar char = javaString.callMethod<jchar>("charAt", "(I)C", 0);
*
* ----
*
* jstring string = QJNIObject::callStaticMethod<jstring>("java/lang/String",
* "valueOf",
* "(I)Ljava/lang/String;", 2);
*
* ----
*
* // Constructor with argument
* jstring someString;
* QJNIObject someObject("java/some/Class", "(Ljava/lang/String;)V", someString);
* someObject.setField<jint>("fieldName", 10);
* someObject.callMethod<void>("doStuff");
*/
class QJNIObject
{
public:
QJNIObject(const char *className);
QJNIObject(const char *className, const char *sig, ...);
QJNIObject(jclass clazz);
QJNIObject(jclass clazz, const char *sig, ...);
QJNIObject(jobject obj);
virtual ~QJNIObject();
static bool isClassAvailable(const char *className);
bool isValid() const { return m_jobject != 0; }
jobject object() const { return m_jobject; }
template <typename T>
T callMethod(const char *methodName);
template <typename T>
T callMethod(const char *methodName, const char *sig, ...);
template <typename T>
QJNILocalRef<T> callObjectMethod(const char *methodName);
template <typename T>
QJNILocalRef<T> callObjectMethod(const char *methodName, const char *sig, ...);
template <typename T>
static T callStaticMethod(const char *className, const char *methodName);
template <typename T>
static T callStaticMethod(const char *className, const char *methodName, const char *sig, ...);
template <typename T>
static QJNILocalRef<T> callStaticObjectMethod(const char *className, const char *methodName);
template <typename T>
static QJNILocalRef<T> callStaticObjectMethod(const char *className,
const char *methodName,
const char *sig, ...);
template <typename T>
static T callStaticMethod(jclass clazz, const char *methodName);
template <typename T>
static T callStaticMethod(jclass clazz, const char *methodName, const char *sig, ...);
template <typename T>
static QJNILocalRef<T> callStaticObjectMethod(jclass clazz, const char *methodName);
template <typename T>
static QJNILocalRef<T> callStaticObjectMethod(jclass clazz,
const char *methodName,
const char *sig, ...);
template <typename T>
T getField(const char *fieldName);
template <typename T>
T getField(const char *fieldName, const char *sig);
template <typename T>
QJNILocalRef<T> getObjectField(const char *fieldName);
template <typename T>
QJNILocalRef<T> getObjectField(const char *fieldName, const char *sig);
template <typename T>
void setField(const char *fieldName, T value);
template <typename T>
void setField(const char *fieldName, const char *sig, T value);
template <typename T>
static QJNILocalRef<T> getStaticObjectField(const char *className, const char *fieldName);
template <typename T>
static QJNILocalRef<T> getStaticObjectField(const char *className,
const char *fieldName,
const char *sig);
template <typename T>
static T getStaticField(const char *className, const char *fieldName);
template <typename T>
static QJNILocalRef<T> getStaticObjectField(jclass clazz, const char *fieldName);
template <typename T>
static QJNILocalRef<T> getStaticObjectField(jclass clazz, const char *fieldName, const char *sig);
template <typename T>
static T getStaticField(jclass clazz, const char *fieldName);
template <typename T>
static void setStaticField(const char *className,
const char *fieldName,
const char *sig,
T value);
template <typename T>
static void setStaticField(const char *className, const char *fieldName, T value);
template <typename T>
static void setStaticField(jclass clazz, const char *fieldName, const char *sig, T value);
template <typename T>
static void setStaticField(jclass clazz, const char *fieldName, T value);
protected:
jobject m_jobject;
jclass m_jclass;
bool m_own_jclass;
};
QT_END_NAMESPACE
#endif // QJNIOBJECT_H

1
src/platformsupport/platformsupport.pro
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@ -22,3 +22,4 @@ include(devicediscovery/devicediscovery.pri)
include(services/services.pri) include(services/services.pri)
include(themes/themes.pri) include(themes/themes.pri)
include(linuxaccessibility/linuxaccessibility.pri) include(linuxaccessibility/linuxaccessibility.pri)
include(jniconvenience/jniconvenience.pri)