Bluetooth: Support MAP and PBAP Client role on Bluedroid.

Implementation of android.bluetooth.client.pbap and
android.bluetooth.client.map STATIC JAVA lib for PBAP and MAP
client role(s). These static libraries can be used by application
for PBAP and MAP Client role support on Bluedroid.

Change-Id: I173d2c095661704e2efb39516837c6b681193e9a
diff --git a/src/android/bluetooth/client/map/BluetoothMasObexClientSession.java b/src/android/bluetooth/client/map/BluetoothMasObexClientSession.java
new file mode 100644
index 0000000..f949b8d
--- /dev/null
+++ b/src/android/bluetooth/client/map/BluetoothMasObexClientSession.java
@@ -0,0 +1,192 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.bluetooth.client.map;
+
+import android.os.Handler;
+import android.os.Process;
+import android.util.Log;
+
+import java.io.IOException;
+
+import javax.obex.ClientSession;
+import javax.obex.HeaderSet;
+import javax.obex.ObexTransport;
+import javax.obex.ResponseCodes;
+
+class BluetoothMasObexClientSession {
+    private static final String TAG = "BluetoothMasObexClientSession";
+
+    private static final byte[] MAS_TARGET = new byte[] {
+            (byte) 0xbb, 0x58, 0x2b, 0x40, 0x42, 0x0c, 0x11, (byte) 0xdb, (byte) 0xb0, (byte) 0xde,
+            0x08, 0x00, 0x20, 0x0c, (byte) 0x9a, 0x66
+    };
+
+    static final int MSG_OBEX_CONNECTED = 100;
+    static final int MSG_OBEX_DISCONNECTED = 101;
+    static final int MSG_REQUEST_COMPLETED = 102;
+
+    private final ObexTransport mTransport;
+
+    private final Handler mSessionHandler;
+
+    private ClientThread mClientThread;
+
+    private volatile boolean mInterrupted;
+
+    private class ClientThread extends Thread {
+        private final ObexTransport mTransport;
+
+        private ClientSession mSession;
+
+        private BluetoothMasRequest mRequest;
+
+        private boolean mConnected;
+
+        public ClientThread(ObexTransport transport) {
+            super("MAS ClientThread");
+
+            mTransport = transport;
+            mConnected = false;
+        }
+
+        @Override
+        public void run() {
+            Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
+
+            connect();
+
+            if (mConnected) {
+                mSessionHandler.obtainMessage(MSG_OBEX_CONNECTED).sendToTarget();
+            } else {
+                mSessionHandler.obtainMessage(MSG_OBEX_DISCONNECTED).sendToTarget();
+                return;
+            }
+
+            while (!mInterrupted) {
+                synchronized (this) {
+                    if (mRequest == null) {
+                        try {
+                            this.wait();
+                        } catch (InterruptedException e) {
+                            mInterrupted = true;
+                        }
+                    }
+                }
+
+                if (!mInterrupted && mRequest != null) {
+                    try {
+                        mRequest.execute(mSession);
+                    } catch (IOException e) {
+                        // this will "disconnect" to cleanup
+                        mInterrupted = true;
+                    }
+
+                    BluetoothMasRequest oldReq = mRequest;
+                    mRequest = null;
+
+                    mSessionHandler.obtainMessage(MSG_REQUEST_COMPLETED, oldReq).sendToTarget();
+                }
+            }
+
+            disconnect();
+
+            mSessionHandler.obtainMessage(MSG_OBEX_DISCONNECTED).sendToTarget();
+        }
+
+        private void connect() {
+            try {
+                mSession = new ClientSession(mTransport);
+
+                HeaderSet headerset = new HeaderSet();
+                headerset.setHeader(HeaderSet.TARGET, MAS_TARGET);
+
+                headerset = mSession.connect(headerset);
+
+                if (headerset.getResponseCode() == ResponseCodes.OBEX_HTTP_OK) {
+                    mConnected = true;
+                } else {
+                    disconnect();
+                }
+            } catch (IOException e) {
+            }
+        }
+
+        private void disconnect() {
+            try {
+                mSession.disconnect(null);
+            } catch (IOException e) {
+            }
+
+            try {
+                mSession.close();
+            } catch (IOException e) {
+            }
+
+            mConnected = false;
+        }
+
+        public synchronized boolean schedule(BluetoothMasRequest request) {
+            if (mRequest != null) {
+                return false;
+            }
+
+            mRequest = request;
+            notify();
+
+            return true;
+        }
+    }
+
+    public BluetoothMasObexClientSession(ObexTransport transport, Handler handler) {
+        mTransport = transport;
+        mSessionHandler = handler;
+    }
+
+    public void start() {
+        if (mClientThread == null) {
+            mClientThread = new ClientThread(mTransport);
+            mClientThread.start();
+        }
+
+    }
+
+    public void stop() {
+        if (mClientThread != null) {
+            mClientThread.interrupt();
+
+            (new Thread() {
+                @Override
+                public void run() {
+                    try {
+                        mClientThread.join();
+                        mClientThread = null;
+                    } catch (InterruptedException e) {
+                        Log.w(TAG, "Interrupted while waiting for thread to join");
+                    }
+                }
+            }).run();
+        }
+    }
+
+    public boolean makeRequest(BluetoothMasRequest request) {
+        if (mClientThread == null) {
+            return false;
+        }
+
+        return mClientThread.schedule(request);
+    }
+}