annotate src/com/five_ten_sg/connectbot/transport/Local.java @ 12:6aaefb22d876 tn5250

adding tn5250 files
author Carl Byington <carl@five-ten-sg.com>
date Thu, 22 May 2014 18:41:36 -0700
parents 0ce5cc452d02
children 139394237973
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1 /*
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2 * ConnectBot: simple, powerful, open-source SSH client for Android
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3 * Copyright 2007 Kenny Root, Jeffrey Sharkey
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4 *
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5 * Licensed under the Apache License, Version 2.0 (the "License");
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6 * you may not use this file except in compliance with the License.
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7 * You may obtain a copy of the License at
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8 *
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9 * http://www.apache.org/licenses/LICENSE-2.0
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10 *
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11 * Unless required by applicable law or agreed to in writing, software
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12 * distributed under the License is distributed on an "AS IS" BASIS,
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13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 * See the License for the specific language governing permissions and
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15 * limitations under the License.
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16 */
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17
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18 package com.five_ten_sg.connectbot.transport;
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19
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20 import java.io.FileDescriptor;
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21 import java.io.FileInputStream;
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22 import java.io.FileOutputStream;
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23 import java.io.IOException;
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24 import java.util.Map;
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25
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26 import com.five_ten_sg.connectbot.R;
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27 import com.five_ten_sg.connectbot.bean.HostBean;
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28 import com.five_ten_sg.connectbot.service.TerminalBridge;
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29 import com.five_ten_sg.connectbot.service.TerminalManager;
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30 import com.five_ten_sg.connectbot.util.HostDatabase;
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31 import android.content.Context;
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32 import android.net.Uri;
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33 import android.util.Log;
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34
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35 import com.google.ase.Exec;
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36
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37 /**
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38 * @author Kenny Root
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39 *
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40 */
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41 public class Local extends AbsTransport {
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42 private static final String TAG = "ConnectBot.Local";
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43 private static final String PROTOCOL = "local";
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44
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45 private static final String DEFAULT_URI = "local:#Local";
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46
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47 private FileDescriptor shellFd;
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48
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49 private FileInputStream is;
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50 private FileOutputStream os;
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51
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52 /**
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53 *
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54 */
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55 public Local() {
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56 }
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57
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58 /**
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59 * @param host
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60 * @param bridge
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61 * @param manager
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62 */
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63 public Local(HostBean host, TerminalBridge bridge, TerminalManager manager) {
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64 super(host, bridge, manager);
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65 }
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66
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67 public static String getProtocolName() {
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68 return PROTOCOL;
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69 }
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70
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71 @Override
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72 public void close() {
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73 try {
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74 if (os != null) {
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75 os.close();
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76 os = null;
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77 }
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78
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79 if (is != null) {
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80 is.close();
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81 is = null;
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82 }
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83 }
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84 catch (IOException e) {
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85 Log.e(TAG, "Couldn't close shell", e);
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86 }
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87 }
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88
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89 @Override
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90 public void connect() {
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91 int[] pids = new int[1];
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92
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93 try {
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94 shellFd = Exec.createSubprocess("/system/bin/sh", "-", null, pids);
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95 }
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96 catch (Exception e) {
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97 bridge.outputLine(manager.res.getString(R.string.local_shell_unavailable));
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98 Log.e(TAG, "Cannot start local shell", e);
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99 return;
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100 }
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101
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102 final int shellPid = pids[0];
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103 Runnable exitWatcher = new Runnable() {
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104 public void run() {
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105 Exec.waitFor(shellPid);
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106 bridge.dispatchDisconnect(false);
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107 }
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108 };
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109 Thread exitWatcherThread = new Thread(exitWatcher);
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110 exitWatcherThread.setName("LocalExitWatcher");
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111 exitWatcherThread.setDaemon(true);
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112 exitWatcherThread.start();
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113 is = new FileInputStream(shellFd);
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114 os = new FileOutputStream(shellFd);
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115 bridge.onConnected();
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116 }
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117
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118 @Override
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119 public void flush() throws IOException {
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120 os.flush();
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121 }
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122
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123 @Override
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124 public String getDefaultNickname(String username, String hostname, int port) {
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125 return DEFAULT_URI;
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126 }
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127
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128 @Override
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129 public int getDefaultPort() {
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130 return 0;
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131 }
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132
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133 @Override
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134 public boolean isConnected() {
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135 return is != null && os != null;
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136 }
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137
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138 @Override
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139 public boolean isSessionOpen() {
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140 return is != null && os != null;
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141 }
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142
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143 @Override
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144 public boolean isAuthenticated() {
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145 return isConnected();
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146 }
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147
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148 @Override
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149 public boolean willBlock() {
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150 if (is == null) return true;
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151 try {
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152 return is.available() == 0;
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153 } catch (Exception e) {
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154 return true;
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155 }
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156 }
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157
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158 @Override
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159 public int read(byte[] buffer, int start, int len) throws IOException {
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160 if (is == null) {
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161 bridge.dispatchDisconnect(false);
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162 throw new IOException("session closed");
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163 }
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164
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165 return is.read(buffer, start, len);
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166 }
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167
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168 @Override
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169 public void setDimensions(int columns, int rows, int width, int height) {
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170 try {
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171 Exec.setPtyWindowSize(shellFd, rows, columns, width, height);
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172 }
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173 catch (Exception e) {
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174 Log.e(TAG, "Couldn't resize pty", e);
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175 }
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176 }
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177
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178 @Override
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179 public void write(byte[] buffer) throws IOException {
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180 if (os != null)
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181 os.write(buffer);
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182 }
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183
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184 @Override
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185 public void write(int c) throws IOException {
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186 if (os != null)
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187 os.write(c);
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188 }
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189
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190 public Uri getUri(String input) {
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191 Uri uri = Uri.parse(DEFAULT_URI);
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192
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193 if (input != null && input.length() > 0) {
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194 uri = uri.buildUpon().fragment(input).build();
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195 }
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196
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197 return uri;
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198 }
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199
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200 @Override
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201 public HostBean createHost(Uri uri) {
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202 HostBean host = new HostBean();
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203 host.setProtocol(PROTOCOL);
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204 String nickname = uri.getFragment();
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205
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206 if (nickname == null || nickname.length() == 0) {
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207 host.setNickname(getDefaultNickname(host.getUsername(),
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208 host.getHostname(), host.getPort()));
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209 }
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210 else {
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211 host.setNickname(uri.getFragment());
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212 }
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213
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214 return host;
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215 }
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216
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217 @Override
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218 public void getSelectionArgs(Uri uri, Map<String, String> selection) {
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219 selection.put(HostDatabase.FIELD_HOST_PROTOCOL, PROTOCOL);
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220 selection.put(HostDatabase.FIELD_HOST_NICKNAME, uri.getFragment());
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221 }
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222
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223 public String getFormatHint(Context context) {
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224 return context.getString(R.string.hostpref_nickname_title);
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225 }
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226
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227 @Override
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228 public boolean usesNetwork() {
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229 return false;
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230 }
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231 }