Initial working Java binding for the direct_bt C++ module

Example ScannerTinyB01 demonstrates efficient scanning devices using the new BluetoothDeviceDiscoveryListener interface.

The C++ HCIObject extends JavaUplink, which handles the java object references
via 'std::shared_ptr<JavaAnonObj>', where JavaAnonObj relies on later polymorph specialization.

JavaAnonObj gets derived in the java/jni of direct_bt, where the JNI header + libraries are available.

+++

The java inplementing NativeDownlink implementations
store the nativeInstance to the C++ instances
as well as handle their java references within the native instances.

The C++ JavaUplink and Java NativeDownlink interfaces are complete
the cross referencing java <-> native.

+++

Native libraries are now split into pairs:
- tinyb + javatinyb
- direct_bt + javadirect_bt

TODO: BluetoothFactory must chose the proper bundle!

+++

The Java Adapter received a BluetoothDeviceDiscoveryListener hook,
matching C++ Adapter's HCIDeviceDiscoveryListener.

Since the Java Adapter implements its own discovery thread,
using the BluetoothDeviceDiscoveryListener is more efficient then polling
over a list of Devices fetched.

++++

TODO: Align Java and C++ class names, foremost in the C++ direct_bt space.

TODO: Bind the whole C++ GATT functionality

More testing.

1 files changed, 34 insertions, 0 deletions

diff --git a/java/jni/direct_bt/DBTGattDescriptor.cxx b/java/jni/direct_bt/DBTGattDescriptor.cxx
new file mode 100644
index 00000000..59410d92
--- /dev/null
+++ b/java/jni/direct_bt/DBTGattDescriptor.cxx
@@ -0,0 +1,34 @@
+/*
+ * Author: Sven Gothel <[email protected]>
+ * Copyright (c) 2020 Gothel Software e.K.
+ * Copyright (c) 2020 ZAFENA AB
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "direct_bt_tinyb_GattDescriptor.h"
+
+#include "JNIMem.hpp"
+#include "helper_base.hpp"
+
+#include "direct_bt/HCITypes.hpp"
+
+using namespace direct_bt;
+