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annotate src/luan/lib/IoLib.java @ 125:0cd559a16758

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add sockets git-svn-id: https://luan-java.googlecode.com/svn/trunk@126 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 06 Jun 2014 05:59:11 +0000
parents f537ff5e511d
children 486a0641bca4
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rev   line source
115
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1 package luan.lib;
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2
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3 import java.io.InputStream;
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4 import java.io.OutputStream;
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5 import java.io.PrintStream;
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6 import java.io.Reader;
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7 import java.io.Writer;
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8 import java.io.FileReader;
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9 import java.io.FileWriter;
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10 import java.io.BufferedReader;
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11 import java.io.BufferedWriter;
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12 import java.io.BufferedOutputStream;
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13 import java.io.File;
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14 import java.io.FileInputStream;
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15 import java.io.FileOutputStream;
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16 import java.io.InputStreamReader;
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17 import java.io.OutputStreamWriter;
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18 import java.io.ByteArrayInputStream;
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19 import java.io.IOException;
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20 import java.net.URL;
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21 import java.net.Socket;
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22 import java.net.ServerSocket;
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23 import java.net.MalformedURLException;
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24 import luan.LuanState;
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25 import luan.LuanTable;
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26 import luan.LuanFunction;
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27 import luan.LuanJavaFunction;
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28 import luan.LuanException;
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31 public final class IoLib {
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32
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33 public static void load(LuanState luan) throws LuanException {
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34 luan.load("Io",LOADER);
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35 }
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37 public static final LuanFunction LOADER = new LuanFunction() {
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38 @Override public Object call(LuanState luan,Object[] args) {
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39 LuanTable module = new LuanTable();
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40 try {
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41 add( module, "file", String.class );
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42 add( module, "java_resource_to_url", String.class );
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43 add( module, "url", String.class );
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44 add( module, "java_resource", String.class );
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45 add( module, "read_console_line", String.class );
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47 LuanTable stdin = new LuanTable();
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48 stdin.put( "read_text", new LuanJavaFunction(
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49 IoLib.class.getMethod( "stdin_read_text" ), null
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50 ) );
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51 stdin.put( "read_binary", new LuanJavaFunction(
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52 IoLib.class.getMethod( "stdin_read_binary" ), null
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53 ) );
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54 stdin.put( "read_lines", new LuanJavaFunction(
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55 IoLib.class.getMethod( "stdin_read_lines" ), null
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56 ) );
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57 stdin.put( "read_blocks", new LuanJavaFunction(
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58 IoLib.class.getMethod( "stdin_read_blocks", Integer.class ), null
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59 ) );
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60 module.put( "stdin", stdin );
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62 add( module, "socket", String.class, Integer.TYPE );
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63 add( module, "socket_server", Integer.TYPE );
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64 } catch(NoSuchMethodException e) {
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65 throw new RuntimeException(e);
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66 }
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67 module.put( "stdout", textWriter(System.out) );
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68 module.put( "stderr", textWriter(System.err) );
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69 return module;
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70 }
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71 };
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73 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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74 t.put( method, new LuanJavaFunction(IoLib.class.getMethod(method,parameterTypes),null) );
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75 }
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76
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78 public static String stdin_read_text() throws IOException {
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79 return Utils.readAll(new InputStreamReader(System.in));
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80 }
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82 public static byte[] stdin_read_binary() throws IOException {
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83 return Utils.readAll(System.in);
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84 }
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86 public static LuanFunction stdin_read_lines() throws IOException {
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87 return lines(new BufferedReader(new InputStreamReader(System.in)));
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88 }
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90 public static LuanFunction stdin_read_blocks(Integer blockSize) throws IOException {
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91 int n = blockSize!=null ? blockSize : Utils.bufSize;
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92 return blocks(System.in,n);
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93 }
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95 public static String java_resource_to_url(String path) throws IOException {
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96 URL url = ClassLoader.getSystemResource(path);
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97 return url==null ? null : url.toString();
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98 }
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99
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100 public static LuanTable java_resource(String path) throws IOException {
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101 return url(java_resource_to_url(path));
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102 }
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103
118
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104 public static String read_console_line(String prompt) throws IOException {
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105 if( prompt==null )
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106 prompt = "> ";
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107 return System.console().readLine(prompt);
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108 }
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109
115
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110
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111 public interface LuanWriter {
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112 public void write(LuanState luan,Object... args) throws LuanException, IOException;
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113 public void close() throws IOException;
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114 }
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115
122
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116 public static LuanTable textWriter(final PrintStream out) {
115
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117 LuanWriter luanWriter = new LuanWriter() {
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118
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119 public void write(LuanState luan,Object... args) throws LuanException {
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120 for( Object obj : args ) {
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121 out.print( luan.JAVA.toString(obj) );
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122 }
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123 }
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124
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125 public void close() {
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126 out.close();
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127 }
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128 };
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129 return writer(luanWriter);
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130 }
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131
122
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132 public static LuanTable textWriter(final Writer out) {
115
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133 LuanWriter luanWriter = new LuanWriter() {
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134
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135 public void write(LuanState luan,Object... args) throws LuanException, IOException {
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136 for( Object obj : args ) {
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137 out.write( luan.JAVA.toString(obj) );
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138 }
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139 }
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140
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141 public void close() throws IOException {
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142 out.close();
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143 }
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144 };
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145 return writer(luanWriter);
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146 }
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147
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148 private static LuanTable writer(LuanWriter luanWriter) {
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149 LuanTable writer = new LuanTable();
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150 try {
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151 writer.put( "write", new LuanJavaFunction(
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152 LuanWriter.class.getMethod( "write", LuanState.class, new Object[0].getClass() ), luanWriter
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153 ) );
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154 writer.put( "close", new LuanJavaFunction(
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155 LuanWriter.class.getMethod( "close" ), luanWriter
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156 ) );
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157 } catch(NoSuchMethodException e) {
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158 throw new RuntimeException(e);
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159 }
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160 return writer;
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161 }
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162
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163
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164 public static LuanTable binaryWriter(final OutputStream out) {
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165 LuanTable writer = new LuanTable();
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166 try {
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167 writer.put( "write", new LuanJavaFunction(
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168 OutputStream.class.getMethod( "write", new byte[0].getClass() ), out
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169 ) );
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170 writer.put( "close", new LuanJavaFunction(
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171 OutputStream.class.getMethod( "close" ), out
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172 ) );
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173 } catch(NoSuchMethodException e) {
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174 throw new RuntimeException(e);
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175 }
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176 return writer;
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177 }
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178
116
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179 static LuanFunction lines(final BufferedReader in) {
115
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180 return new LuanFunction() {
116
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181 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
115
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182 try {
116
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183 if( args.length > 0 ) {
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184 if( args.length > 1 || !"close".equals(args[0]) )
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185 throw luan.JAVA.exception( "the only argument allowed is 'close'" );
115
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186 in.close();
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187 return null;
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188 }
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189 String rtn = in.readLine();
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190 if( rtn==null )
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191 in.close();
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192 return rtn;
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193 } catch(IOException e) {
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194 throw luan.JAVA.exception(e);
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195 }
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196 }
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197 };
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198 }
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199
116
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200 static LuanFunction blocks(final InputStream in,final int blockSize) {
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201 return new LuanFunction() {
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202 final byte[] a = new byte[blockSize];
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203
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204 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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205 try {
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206 if( args.length > 0 ) {
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207 if( args.length > 1 || !"close".equals(args[0]) )
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208 throw luan.JAVA.exception( "the only argument allowed is 'close'" );
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209 in.close();
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210 return null;
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211 }
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212 if( in.read(a) == -1 ) {
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213 in.close();
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214 return null;
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215 }
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216 return a;
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217 } catch(IOException e) {
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218 throw luan.JAVA.exception(e);
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219 }
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220 }
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221 };
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222 }
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223
125
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224
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225
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226 public static abstract class LuanIn {
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227 abstract InputStream inputStream() throws IOException;
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228
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229 public String read_text() throws IOException {
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230 Reader in = new InputStreamReader(inputStream());
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231 String s = Utils.readAll(in);
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232 in.close();
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233 return s;
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234 }
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235
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236 public byte[] read_binary() throws IOException {
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237 InputStream in = inputStream();
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238 byte[] a = Utils.readAll(in);
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239 in.close();
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240 return a;
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241 }
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242
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243 public LuanFunction read_lines() throws IOException {
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244 return lines(new BufferedReader(new InputStreamReader(inputStream())));
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245 }
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246
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247 public LuanFunction read_blocks(Integer blockSize) throws IOException {
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248 int n = blockSize!=null ? blockSize : Utils.bufSize;
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249 return blocks(inputStream(),n);
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250 }
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251
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252 LuanTable table() {
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253 LuanTable tbl = new LuanTable();
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254 try {
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255 tbl.put( "read_text", new LuanJavaFunction(
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256 LuanIn.class.getMethod( "read_text" ), this
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257 ) );
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258 tbl.put( "read_binary", new LuanJavaFunction(
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259 LuanIn.class.getMethod( "read_binary" ), this
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260 ) );
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261 tbl.put( "read_lines", new LuanJavaFunction(
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262 LuanIn.class.getMethod( "read_lines" ), this
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263 ) );
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264 tbl.put( "read_blocks", new LuanJavaFunction(
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265 LuanIn.class.getMethod( "read_blocks", Integer.class ), this
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266 ) );
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267 } catch(NoSuchMethodException e) {
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268 throw new RuntimeException(e);
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269 }
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270 return tbl;
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271 }
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272 }
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273
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274 public static abstract class LuanIO extends LuanIn {
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275 abstract OutputStream outputStream() throws IOException;
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276
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277 public void write(LuanState luan,Object obj) throws LuanException, IOException {
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278 if( obj instanceof String ) {
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279 String s = (String)obj;
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280 Writer out = new OutputStreamWriter(outputStream());
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281 out.write(s);
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282 out.close();
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283 return;
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284 }
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285 if( obj instanceof byte[] ) {
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286 byte[] a = (byte[])obj;
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287 OutputStream out = outputStream();
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288 Utils.copyAll(new ByteArrayInputStream(a),out);
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289 out.close();
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290 return;
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291 }
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diff changeset
292 throw luan.JAVA.exception( "bad argument #1 to 'write' (string or binary expected)" );
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293 }
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294
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295 public LuanTable text_writer() throws IOException {
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296 return textWriter(new BufferedWriter(new OutputStreamWriter(outputStream())));
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297 }
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298
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299 public LuanTable binary_writer() throws IOException {
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300 return binaryWriter(new BufferedOutputStream(outputStream()));
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301 }
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302
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303 LuanTable table() {
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304 LuanTable tbl = super.table();
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305 try {
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306 tbl.put( "write", new LuanJavaFunction(
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307 LuanIO.class.getMethod( "write", LuanState.class, Object.class ), this
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308 ) );
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309 tbl.put( "text_writer", new LuanJavaFunction(
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310 LuanIO.class.getMethod( "text_writer" ), this
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311 ) );
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312 tbl.put( "binary_writer", new LuanJavaFunction(
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313 LuanIO.class.getMethod( "binary_writer" ), this
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314 ) );
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315 } catch(NoSuchMethodException e) {
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316 throw new RuntimeException(e);
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317 }
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318 return tbl;
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319 }
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320 }
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321
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322 public static final class LuanUrl extends LuanIn {
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323 private final URL url;
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324
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325 public LuanUrl(String s) throws MalformedURLException {
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326 this.url = new URL(s);
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327 }
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328
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329 InputStream inputStream() throws IOException {
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330 return url.openStream();
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331 }
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332 }
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333
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334 public static LuanTable url(String s) throws MalformedURLException {
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335 return new LuanUrl(s).table();
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336 }
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337
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338 public static final class LuanFile extends LuanIO {
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339 private final File file;
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340
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341 public LuanFile(String name) {
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342 this.file = new File(name);
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343 }
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344
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345 InputStream inputStream() throws IOException {
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346 return new FileInputStream(file);
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347 }
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348
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349 OutputStream outputStream() throws IOException {
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350 return new FileOutputStream(file);
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351 }
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352 }
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353
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354 public static LuanTable file(String name) {
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355 return new LuanFile(name).table();
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356 }
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357
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358 public static final class LuanSocket extends LuanIO {
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359 private final Socket socket;
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360
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361 public LuanSocket(String host,int port) throws IOException {
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362 this(new Socket(host,port));
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363 }
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364
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365 public LuanSocket(Socket socket) throws IOException {
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366 this.socket = socket;
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367 }
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368
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369 InputStream inputStream() throws IOException {
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370 return socket.getInputStream();
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371 }
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372
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373 OutputStream outputStream() throws IOException {
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374 return socket.getOutputStream();
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375 }
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376 }
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377
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378 public static LuanTable socket(String host,int port) throws IOException {
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379 return new LuanSocket(host,port).table();
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380 }
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381
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382 public static LuanFunction socket_server(int port) throws IOException {
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383 final ServerSocket ss = new ServerSocket(port);
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384 return new LuanFunction() {
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385 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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386 try {
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387 if( args.length > 0 ) {
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388 if( args.length > 1 || !"close".equals(args[0]) )
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389 throw luan.JAVA.exception( "the only argument allowed is 'close'" );
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390 ss.close();
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391 return null;
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392 }
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393 return new LuanSocket(ss.accept()).table();
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394 } catch(IOException e) {
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395 throw luan.JAVA.exception(e);
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396 }
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397 }
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398 };
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399 }
115
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400 }