bluetooth: android: Implement RetrieveGattConnectedDevicesWithFilter

device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothManager.java

Index: device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothManager.java
diff --git a/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothManager.java b/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothManager.java
new file mode 100644
index 0000000000000000000000000000000000000000..34cdd6920d97c562b48f9bd5da8c564c902c2795
--- /dev/null
+++ b/device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothManager.java
@@ -0,0 +1,107 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.device.bluetooth;
+
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothProfile;
+import android.os.Build;
+import android.os.ParcelUuid;
+
+import org.chromium.base.Log;
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+
+import java.util.List;
+
+/**
+ * Exposes android.bluetooth.BluetoothManager as necessary for C++
+ * device::BluetoothAdapterAndroid, which implements the cross platform
+ * device::BluetoothAdapter.
+ *
+ * Lifetime is controlled by device::BluetoothAdapterAndroid.
+ */
+@JNINamespace("device")
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+final class ChromeBluetoothManager {
+    private static final String TAG = "Bluetooth";
+
+    private final Wrappers.BluetoothManagerWrapper mManager;
+
+    // Helper class for sending Wrappers.BluetoothDeviceWrapper and string UUIDs pairs
+    // over to C++.
+    static class DeviceAndUUIDs {
+        final String mAddress;
+        final Wrappers.BluetoothDeviceWrapper mDevice;
+        final String[] mUuids;
+
+        DeviceAndUUIDs(Wrappers.BluetoothDeviceWrapper device, String[] uuids) {
+            mAddress = device.getAddress();
+            mDevice = device;
+            mUuids = uuids;
+        }
+
+        @CalledByNative("DeviceAndUUIDs")
+        String getAddress() {
+            return mAddress;
+        }
+
+        // 'Object' type must be used because inner class Wrappers.BluetoothDeviceWrapper reference
+        // is not handled by jni_generator.py JavaToJni. http://crbug.com/505554
+        @CalledByNative("DeviceAndUUIDs")
+        Object getDevice() {
+            return mDevice;
+        }
+
+        @CalledByNative("DeviceAndUUIDs")
+        String[] getUuids() {
+            return mUuids;
+        }
+    }
+
+    /**
+     * Constructs a ChromeBluetoothManager.
+     * @param managerWrapper Wraps the default android.bluetooth.BluetoothManager,
+     *                       but may be either null or fake for testing.
+     */
+    public ChromeBluetoothManager(Wrappers.BluetoothManagerWrapper managerWrapper) {
+        mManager = managerWrapper;
+        if (mManager == null) {
+            Log.i(TAG, "ChromeBluetoothManager created with no managerWrapper.");
+        } else {
+            Log.i(TAG, "ChromeBluetoothManager created with provided managerWrapper.");
+        }
+    }
+
+    // Wrappers.BluetoothManagerWrapper reference is not handled by jni_generator.py JavaToJni.
+    // http://crbug.com/505554
+    @CalledByNative
+    private static ChromeBluetoothManager create(Object managerWrapper) {
+        return new ChromeBluetoothManager((Wrappers.BluetoothManagerWrapper) managerWrapper);
+    }
+
+    /**
+     * Retrieves all GATT Connected devices and their UUIDs.
+     * @return An array of DeviceAndUUIDs with all connected devices and their respective
+     * UUIDs.
+     */
+    @CalledByNative
+    private DeviceAndUUIDs[] retrieveGattConnectedDevices() {
+        List<Wrappers.BluetoothDeviceWrapper> connected_devices =
+                mManager.getConnectedDevices(BluetoothProfile.GATT);
+        DeviceAndUUIDs[] devices_and_uuids = new DeviceAndUUIDs[connected_devices.size()];
+
+        for (int device_idx = 0; device_idx < connected_devices.size(); device_idx++) {
+            Wrappers.BluetoothDeviceWrapper device = connected_devices.get(device_idx);
+            ParcelUuid[] uuids = device.getUuids();
+            String[] uuid_strings = new String[uuids.length];
+            for (int uuid_idx = 0; uuid_idx < uuids.length; uuid_idx++) {
+                uuid_strings[uuid_idx] = uuids[uuid_idx].toString();
+            }
+            devices_and_uuids[device_idx] = new DeviceAndUUIDs(device, uuid_strings);
+        }
+
+        return devices_and_uuids;
+    }
+}