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Diffstat (limited to 'src/platformsupport/jniconvenience/qjnihelpers_p.h')
| -rw-r--r-- | src/platformsupport/jniconvenience/qjnihelpers_p.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/platformsupport/jniconvenience/qjnihelpers_p.h b/src/platformsupport/jniconvenience/qjnihelpers_p.h new file mode 100644 index 0000000000..fb44d156bd --- /dev/null +++ b/src/platformsupport/jniconvenience/qjnihelpers_p.h @@ -0,0 +1,191 @@ +/**************************************************************************** +** +** 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 |