1 /*
2  * Copyright (C) 2009 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 
18 package com.android.hierarchyviewer.scene;
19 
20 import com.android.ddmlib.IDevice;
21 import com.android.hierarchyviewer.device.DeviceBridge;
22 
23 import java.io.BufferedReader;
24 import java.io.BufferedWriter;
25 import java.io.IOException;
26 import java.io.InputStreamReader;
27 import java.io.OutputStreamWriter;
28 import java.net.InetSocketAddress;
29 import java.net.Socket;
30 
31 public class VersionLoader {
loadServerVersion(IDevice device)32     public static int loadServerVersion(IDevice device) {
33         return loadVersion(device, "SERVER");
34     }
35 
loadProtocolVersion(IDevice device)36     public static int loadProtocolVersion(IDevice device) {
37         return loadVersion(device, "PROTOCOL");
38     }
39 
loadVersion(IDevice device, String command)40     private static int loadVersion(IDevice device, String command) {
41         Socket socket = null;
42         BufferedReader in = null;
43         BufferedWriter out = null;
44 
45         try {
46             socket = new Socket();
47             socket.connect(new InetSocketAddress("127.0.0.1",
48                     DeviceBridge.getDeviceLocalPort(device)));
49 
50             out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
51             in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
52 
53             out.write(command);
54             out.newLine();
55             out.flush();
56 
57             return Integer.parseInt(in.readLine());
58         } catch (Exception e) {
59             // Empty
60         } finally {
61             try {
62                 if (out != null) {
63                     out.close();
64                 }
65                 if (in != null) {
66                     in.close();
67                 }
68                 if (socket != null) {
69                     socket.close();
70                 }
71             } catch (IOException ex) {
72                 ex.printStackTrace();
73             }
74         }
75 
76         // Versioning of the protocol and server was added with version 2
77         return 2;
78     }
79 }
80