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Android: Add private API for jni in QtCore 

When interfacing with Java API's on Android we need to write code using
the Java Native Interface (JNI). Writing JNI code requires a lot of
boilerplate code to be written. This patch contains API's to minimize the
amount of work needed to write JNI code.

QJNIEnvironmentPrivate:
 On creation QJNIEnvironmentPrivate will attach the current running
 thread to the Java VM, and expose the java environment.

QJNIObjectPrivate:
 Wrapps around a Java class enabling the user to access the class from C++.

Change-Id: Ib633437ae36ff513d934292e9eeefcdd5b757d29
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
bb10
Christian Strømme 2013-09-18 01:30:54 +02:00 committed by The Qt Project
parent ad4657f639
commit 9329f786da
3 changed files with 2374 additions and 3 deletions
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8
src/corelib/kernel/kernel.pri
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@ -157,7 +157,9 @@ blackberry {
android:!android-no-sdk {
SOURCES += \
kernel/qjnionload.cpp \
kernel/qjnihelpers.cpp
kernel/qjnihelpers.cpp \
kernel/qjni.cpp
HEADERS += \
kernel/qjnihelpers_p.h
}
kernel/qjnihelpers_p.h \
kernel/qjni_p.h
}

2105
src/corelib/kernel/qjni.cpp Normal file
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File diff suppressed because it is too large Load Diff

264
src/corelib/kernel/qjni_p.h Normal file
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@ -0,0 +1,264 @@
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#ifndef QJNI_P_H
#define QJNI_P_H
#include <jni.h>
#include <QtCore/qglobal.h>
#include <QtCore/qsharedpointer.h>
QT_BEGIN_NAMESPACE
class Q_CORE_EXPORT QJNIEnvironmentPrivate
{
public:
QJNIEnvironmentPrivate();
~QJNIEnvironmentPrivate();
JNIEnv *operator->();
operator JNIEnv*() const;
private:
friend class QJNIEnvironment;
Q_DISABLE_COPY(QJNIEnvironmentPrivate)
JNIEnv *jniEnv;
};
class Q_CORE_EXPORT QJNIObjectData
{
public:
QJNIObjectData();
~QJNIObjectData();
jobject m_jobject;
jclass m_jclass;
bool m_own_jclass;
};
class Q_CORE_EXPORT QJNIObjectPrivate
{
public:
QJNIObjectPrivate();
explicit QJNIObjectPrivate(const char *className);
QJNIObjectPrivate(const char *className, const char *sig, ...);
explicit QJNIObjectPrivate(jclass clazz);
QJNIObjectPrivate(jclass clazz, const char *sig, ...);
QJNIObjectPrivate(jobject obj);
template <typename T>
T callMethod(const char *methodName,
const char *sig,
...) const;
template <typename T>
T callMethod(const char *methodName) const;
template <typename T>
QJNIObjectPrivate callObjectMethod(const char *methodName) const;
QJNIObjectPrivate callObjectMethod(const char *methodName,
const char *sig,
...) const;
template <typename T>
static T callStaticMethod(const char *className,
const char *methodName,
const char *sig, ...);
template <typename T>
static T callStaticMethod(const char *className,
const char *methodName);
template <typename T>
static T callStaticMethod(jclass clazz,
const char *methodName,
const char *sig, ...);
template <typename T>
static T callStaticMethod(jclass clazz,
const char *methodName);
static QJNIObjectPrivate callStaticObjectMethod(const char *className,
const char *methodName,
const char *sig, ...);
static QJNIObjectPrivate callStaticObjectMethod(jclass clazz,
const char *methodName,
const char *sig, ...);
template <typename T>
T getField(const char *fieldName) const;
template <typename T>
static T getStaticField(const char *className, const char *fieldName);
template <typename T>
static T getStaticField(jclass clazz, const char *fieldName);
QJNIObjectPrivate getObjectField(const char *fieldName, const char *sig) const;
static QJNIObjectPrivate getStaticObjectField(const char *className,
const char *fieldName,
const char *sig);
static QJNIObjectPrivate getStaticObjectField(jclass clazz,
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 void setStaticField(const char *className,
const char *fieldName,
T value);
template <typename T>
static void setStaticField(const char *className,
const char *fieldName,
const char *sig,
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);
static QJNIObjectPrivate fromString(const QString &string);
QString toString() const;
static bool isClassAvailable(const char *className);
bool isValid() const;
jobject object() const { return d->m_jobject; }
template <typename T>
inline QJNIObjectPrivate &operator=(T o)
{
jobject jobj = static_cast<jobject>(o);
if (!isSameObject(jobj)) {
d = QSharedPointer<QJNIObjectData>(new QJNIObjectData());
QJNIEnvironmentPrivate env;
d->m_jobject = env->NewGlobalRef(jobj);
d->m_jclass = static_cast<jclass>(env->NewGlobalRef(env->GetObjectClass(jobj)));
}
return *this;
}
private:
friend class QJNIObject;
template <typename T>
T callMethod(const char *methodName,
const char *sig,
va_list args) const;
QJNIObjectPrivate callObjectMethod(const char *methodName,
const char *sig,
va_list args) const;
template <typename T>
static T callStaticMethod(const char *className,
const char *methodName,
const char *sig, va_list args);
template <typename T>
static T callStaticMethod(jclass clazz,
const char *methodName,
const char *sig, va_list args);
static QJNIObjectPrivate callStaticObjectMethod(const char *className,
const char *methodName,
const char *sig, va_list args);
static QJNIObjectPrivate callStaticObjectMethod(jclass clazz,
const char *methodName,
const char *sig, va_list args);
bool isSameObject(jobject obj) const;
bool isSameObject(const QJNIObjectPrivate &other) const;
friend bool operator==(const QJNIObjectPrivate &, const QJNIObjectPrivate &);
friend bool operator!=(const QJNIObjectPrivate&, const QJNIObjectPrivate&);
template <typename T> friend bool operator!=(const QJNIObjectPrivate&, T);
template <typename T> friend bool operator==(const QJNIObjectPrivate&, T);
template <typename T> friend bool operator!=(T, const QJNIObjectPrivate&);
template <typename T> friend bool operator==(T, const QJNIObjectPrivate&);
QSharedPointer<QJNIObjectData> d;
};
inline bool operator==(const QJNIObjectPrivate&obj1, const QJNIObjectPrivate&obj2)
{
return obj1.isSameObject(obj2);
}
inline bool operator!=(const QJNIObjectPrivate&obj1, const QJNIObjectPrivate&obj2)
{
return !obj1.isSameObject(obj2);
}
template <typename T>
inline bool operator==(const QJNIObjectPrivate &obj1, T obj2)
{
return obj1.isSameObject(static_cast<jobject>(obj2));
}
template <typename T>
inline bool operator==(T obj1, const QJNIObjectPrivate &obj2)
{
return obj2.isSameObject(static_cast<jobject>(obj1));
}
template <typename T>
inline bool operator!=(const QJNIObjectPrivate &obj1, T obj2)
{
return !obj1.isSameObject(obj2);
}
template <typename T>
inline bool operator!=(T obj1, const QJNIObjectPrivate &obj2)
{
return !obj2.isSameObject(obj1);
}
QT_END_NAMESPACE
#endif // QJNI_P_H