1 files changed, 115 insertions, 0 deletions
diff --git a/src/platformsupport/jniconvenience/qjnihelpers.cpp b/src/platformsupport/jniconvenience/qjnihelpers.cpp
new file mode 100644
index 0000000000..3f9b568368
--- /dev/null
+++ b/src/platformsupport/jniconvenience/qjnihelpers.cpp
@@ -0,0 +1,115 @@
+/****************************************************************************
+**
+** 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