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annotate src/luan/lib/IoLib.java @ 142:05f8c21160ef

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minor git-svn-id: https://luan-java.googlecode.com/svn/trunk@143 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 13 Jun 2014 17:05:31 +0000
parents 7e160d2f6d9c
children fcb81fa2df0d
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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.BufferedInputStream;
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13 import java.io.BufferedOutputStream;
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14 import java.io.File;
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15 import java.io.FileInputStream;
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16 import java.io.FileOutputStream;
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17 import java.io.InputStreamReader;
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18 import java.io.OutputStreamWriter;
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19 import java.io.ByteArrayInputStream;
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20 import java.io.DataInputStream;
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21 import java.io.DataOutputStream;
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22 import java.io.IOException;
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23 import java.net.URL;
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24 import java.net.Socket;
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25 import java.net.ServerSocket;
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26 import java.net.MalformedURLException;
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27 import luan.LuanState;
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28 import luan.LuanTable;
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29 import luan.LuanFunction;
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30 import luan.LuanJavaFunction;
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31 import luan.LuanException;
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34 public final class IoLib {
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36 public static final LuanFunction LOADER = new LuanFunction() {
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37 @Override public Object call(LuanState luan,Object[] args) {
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38 LuanTable module = new LuanTable();
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39 try {
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40 add( module, "file", String.class );
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41 add( module, "java_resource_to_url", String.class );
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42 add( module, "url", String.class );
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43 add( module, "java_resource", String.class );
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44 add( module, "read_console_line", String.class );
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46 LuanTable stdin = new LuanTable();
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47 stdin.put( "read_text", new LuanJavaFunction(
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48 IoLib.class.getMethod( "stdin_read_text" ), null
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49 ) );
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50 stdin.put( "read_binary", new LuanJavaFunction(
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51 IoLib.class.getMethod( "stdin_read_binary" ), null
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52 ) );
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53 stdin.put( "read_lines", new LuanJavaFunction(
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54 IoLib.class.getMethod( "stdin_read_lines" ), null
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55 ) );
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56 stdin.put( "read_blocks", new LuanJavaFunction(
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57 IoLib.class.getMethod( "stdin_read_blocks", Integer.class ), null
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58 ) );
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59 module.put( "stdin", stdin );
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61 add( module, "socket", String.class, Integer.TYPE );
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62 add( module, "socket_server", Integer.TYPE );
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63 } catch(NoSuchMethodException e) {
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64 throw new RuntimeException(e);
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65 }
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66 module.put( "stdout", textWriter(System.out) );
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67 module.put( "stderr", textWriter(System.err) );
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68 return module;
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69 }
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70 };
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72 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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73 t.put( method, new LuanJavaFunction(IoLib.class.getMethod(method,parameterTypes),null) );
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74 }
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75
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77 public static String stdin_read_text() throws IOException {
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78 return Utils.readAll(new InputStreamReader(System.in));
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79 }
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81 public static byte[] stdin_read_binary() throws IOException {
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82 return Utils.readAll(System.in);
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83 }
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84
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85 public static LuanFunction stdin_read_lines() throws IOException {
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86 return lines(new BufferedReader(new InputStreamReader(System.in)));
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87 }
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89 public static LuanFunction stdin_read_blocks(Integer blockSize) throws IOException {
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90 int n = blockSize!=null ? blockSize : Utils.bufSize;
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91 return blocks(System.in,n);
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92 }
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93
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94 public static String java_resource_to_url(String path) {
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95 URL url = ClassLoader.getSystemResource(path);
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96 return url==null ? null : url.toString();
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97 }
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99 public static LuanTable java_resource(String path) throws IOException {
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100 return url(java_resource_to_url(path));
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101 }
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102
118
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103 public static String read_console_line(String prompt) throws IOException {
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104 if( prompt==null )
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105 prompt = "> ";
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106 return System.console().readLine(prompt);
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107 }
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108
115
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109
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110 public interface LuanWriter {
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111 public void write(LuanState luan,Object... args) throws LuanException, IOException;
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112 public void close() throws IOException;
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113 }
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114
122
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115 public static LuanTable textWriter(final PrintStream out) {
115
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116 LuanWriter luanWriter = new LuanWriter() {
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117
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118 public void write(LuanState luan,Object... args) throws LuanException {
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119 for( Object obj : args ) {
130
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120 out.print( luan.toString(obj) );
115
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121 }
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122 }
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123
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124 public void close() {
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125 out.close();
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126 }
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127 };
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128 return writer(luanWriter);
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129 }
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130
122
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131 public static LuanTable textWriter(final Writer out) {
115
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132 LuanWriter luanWriter = new LuanWriter() {
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133
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134 public void write(LuanState luan,Object... args) throws LuanException, IOException {
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135 for( Object obj : args ) {
130
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136 out.write( luan.toString(obj) );
115
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137 }
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138 }
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139
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140 public void close() throws IOException {
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141 out.close();
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142 }
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143 };
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144 return writer(luanWriter);
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145 }
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146
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147 private static LuanTable writer(LuanWriter luanWriter) {
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148 LuanTable writer = new LuanTable();
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149 try {
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150 writer.put( "write", new LuanJavaFunction(
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151 LuanWriter.class.getMethod( "write", LuanState.class, new Object[0].getClass() ), luanWriter
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152 ) );
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153 writer.put( "close", new LuanJavaFunction(
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154 LuanWriter.class.getMethod( "close" ), luanWriter
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155 ) );
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156 } catch(NoSuchMethodException e) {
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157 throw new RuntimeException(e);
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158 }
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159 return writer;
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160 }
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161
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162
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163 public static LuanTable binaryWriter(final OutputStream out) {
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164 LuanTable writer = new LuanTable();
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165 try {
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166 writer.put( "write", new LuanJavaFunction(
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167 OutputStream.class.getMethod( "write", new byte[0].getClass() ), out
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168 ) );
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169 writer.put( "close", new LuanJavaFunction(
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170 OutputStream.class.getMethod( "close" ), out
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171 ) );
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172 } catch(NoSuchMethodException e) {
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173 throw new RuntimeException(e);
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174 }
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175 return writer;
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176 }
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177
116
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178 static LuanFunction lines(final BufferedReader in) {
115
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179 return new LuanFunction() {
116
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180 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
115
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181 try {
116
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182 if( args.length > 0 ) {
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183 if( args.length > 1 || !"close".equals(args[0]) )
130
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184 throw luan.exception( "the only argument allowed is 'close'" );
115
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185 in.close();
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186 return null;
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187 }
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188 String rtn = in.readLine();
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189 if( rtn==null )
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190 in.close();
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191 return rtn;
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192 } catch(IOException e) {
130
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193 throw luan.exception(e);
115
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194 }
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195 }
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196 };
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197 }
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198
116
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199 static LuanFunction blocks(final InputStream in,final int blockSize) {
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200 return new LuanFunction() {
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201 final byte[] a = new byte[blockSize];
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202
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203 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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204 try {
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205 if( args.length > 0 ) {
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206 if( args.length > 1 || !"close".equals(args[0]) )
130
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207 throw luan.exception( "the only argument allowed is 'close'" );
116
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208 in.close();
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209 return null;
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210 }
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211 if( in.read(a) == -1 ) {
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212 in.close();
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213 return null;
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214 }
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215 return a;
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216 } catch(IOException e) {
130
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217 throw luan.exception(e);
116
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218 }
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219 }
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220 };
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221 }
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222
125
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223
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224
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225 public static abstract class LuanIn {
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226 abstract InputStream inputStream() throws IOException;
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227
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228 public String read_text() throws IOException {
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229 Reader in = new InputStreamReader(inputStream());
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230 String s = Utils.readAll(in);
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231 in.close();
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232 return s;
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233 }
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234
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235 public byte[] read_binary() throws IOException {
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236 InputStream in = inputStream();
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237 byte[] a = Utils.readAll(in);
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238 in.close();
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239 return a;
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240 }
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241
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242 public LuanFunction read_lines() throws IOException {
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243 return lines(new BufferedReader(new InputStreamReader(inputStream())));
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244 }
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245
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246 public LuanFunction read_blocks(Integer blockSize) throws IOException {
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247 int n = blockSize!=null ? blockSize : Utils.bufSize;
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248 return blocks(inputStream(),n);
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249 }
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250
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251 LuanTable table() {
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252 LuanTable tbl = new LuanTable();
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253 try {
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254 tbl.put( "read_text", new LuanJavaFunction(
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255 LuanIn.class.getMethod( "read_text" ), this
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256 ) );
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257 tbl.put( "read_binary", new LuanJavaFunction(
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258 LuanIn.class.getMethod( "read_binary" ), this
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259 ) );
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260 tbl.put( "read_lines", new LuanJavaFunction(
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261 LuanIn.class.getMethod( "read_lines" ), this
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262 ) );
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263 tbl.put( "read_blocks", new LuanJavaFunction(
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264 LuanIn.class.getMethod( "read_blocks", Integer.class ), this
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265 ) );
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diff changeset
266 } catch(NoSuchMethodException e) {
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267 throw new RuntimeException(e);
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268 }
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269 return tbl;
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270 }
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271 }
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272
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273 public static abstract class LuanIO extends LuanIn {
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274 abstract OutputStream outputStream() throws IOException;
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275
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276 public void write(LuanState luan,Object obj) throws LuanException, IOException {
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277 if( obj instanceof String ) {
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278 String s = (String)obj;
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279 Writer out = new OutputStreamWriter(outputStream());
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280 out.write(s);
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281 out.close();
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282 return;
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283 }
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diff changeset
284 if( obj instanceof byte[] ) {
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285 byte[] a = (byte[])obj;
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diff changeset
286 OutputStream out = outputStream();
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diff changeset
287 Utils.copyAll(new ByteArrayInputStream(a),out);
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288 out.close();
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diff changeset
289 return;
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290 }
130
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diff changeset
291 throw luan.exception( "bad argument #1 to 'write' (string or binary expected)" );
125
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diff changeset
292 }
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293
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294 public LuanTable text_writer() throws IOException {
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295 return textWriter(new BufferedWriter(new OutputStreamWriter(outputStream())));
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296 }
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297
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298 public LuanTable binary_writer() throws IOException {
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299 return binaryWriter(new BufferedOutputStream(outputStream()));
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300 }
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301
129
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diff changeset
302 @Override LuanTable table() {
125
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303 LuanTable tbl = super.table();
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304 try {
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305 tbl.put( "write", new LuanJavaFunction(
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306 LuanIO.class.getMethod( "write", LuanState.class, Object.class ), this
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diff changeset
307 ) );
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diff changeset
308 tbl.put( "text_writer", new LuanJavaFunction(
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diff changeset
309 LuanIO.class.getMethod( "text_writer" ), this
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310 ) );
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diff changeset
311 tbl.put( "binary_writer", new LuanJavaFunction(
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312 LuanIO.class.getMethod( "binary_writer" ), this
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313 ) );
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314 } catch(NoSuchMethodException e) {
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315 throw new RuntimeException(e);
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316 }
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317 return tbl;
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318 }
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319 }
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320
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321 public static final class LuanUrl extends LuanIn {
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322 private final URL url;
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323
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324 public LuanUrl(String s) throws MalformedURLException {
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325 this.url = new URL(s);
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326 }
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327
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328 InputStream inputStream() throws IOException {
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329 return url.openStream();
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330 }
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331 }
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332
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333 public static LuanTable url(String s) throws MalformedURLException {
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334 return new LuanUrl(s).table();
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335 }
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336
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337 public static final class LuanFile extends LuanIO {
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338 private final File file;
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339
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340 public LuanFile(String name) {
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341 this.file = new File(name);
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342 }
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343
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344 InputStream inputStream() throws IOException {
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345 return new FileInputStream(file);
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346 }
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347
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348 OutputStream outputStream() throws IOException {
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349 return new FileOutputStream(file);
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350 }
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351 }
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352
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353 public static LuanTable file(String name) {
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354 return new LuanFile(name).table();
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355 }
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356
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357 public static final class LuanSocket extends LuanIO {
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358 private final Socket socket;
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359
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360 public LuanSocket(String host,int port) throws IOException {
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361 this(new Socket(host,port));
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362 }
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363
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364 public LuanSocket(Socket socket) throws IOException {
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365 this.socket = socket;
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366 }
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367
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368 InputStream inputStream() throws IOException {
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369 return socket.getInputStream();
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370 }
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371
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372 OutputStream outputStream() throws IOException {
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373 return socket.getOutputStream();
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374 }
129
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375
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376 public LuanTable pickle_client(LuanState luan) throws IOException {
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377 DataInputStream in = new DataInputStream(new BufferedInputStream(inputStream()));
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378 DataOutputStream out = new DataOutputStream(new BufferedOutputStream(outputStream()));
486a0641bca4 add pickle client/server;
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diff changeset
379 return new PickleClient(luan,in,out).table();
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380 }
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381
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diff changeset
382 public void run_pickle_server(LuanState luan) throws IOException {
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diff changeset
383 DataInputStream in = new DataInputStream(new BufferedInputStream(inputStream()));
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384 DataOutputStream out = new DataOutputStream(new BufferedOutputStream(outputStream()));
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diff changeset
385 new PickleServer(luan,in,out).run();
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386 }
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387
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diff changeset
388 @Override LuanTable table() {
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389 LuanTable tbl = super.table();
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390 try {
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391 tbl.put( "pickle_client", new LuanJavaFunction(
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diff changeset
392 LuanSocket.class.getMethod( "pickle_client", LuanState.class ), this
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393 ) );
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diff changeset
394 tbl.put( "run_pickle_server", new LuanJavaFunction(
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diff changeset
395 LuanSocket.class.getMethod( "run_pickle_server", LuanState.class ), this
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diff changeset
396 ) );
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diff changeset
397 } catch(NoSuchMethodException e) {
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diff changeset
398 throw new RuntimeException(e);
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diff changeset
399 }
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diff changeset
400 return tbl;
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diff changeset
401 }
125
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diff changeset
402 }
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parents: 124
diff changeset
403
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diff changeset
404 public static LuanTable socket(String host,int port) throws IOException {
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diff changeset
405 return new LuanSocket(host,port).table();
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diff changeset
406 }
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parents: 124
diff changeset
407
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diff changeset
408 public static LuanFunction socket_server(int port) throws IOException {
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diff changeset
409 final ServerSocket ss = new ServerSocket(port);
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diff changeset
410 return new LuanFunction() {
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diff changeset
411 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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diff changeset
412 try {
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diff changeset
413 if( args.length > 0 ) {
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diff changeset
414 if( args.length > 1 || !"close".equals(args[0]) )
130
0594c132888b cleanup
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diff changeset
415 throw luan.exception( "the only argument allowed is 'close'" );
125
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diff changeset
416 ss.close();
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diff changeset
417 return null;
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diff changeset
418 }
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
419 return new LuanSocket(ss.accept()).table();
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420 } catch(IOException e) {
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421 throw luan.exception(e);
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422 }
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423 }
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424 };
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425 }
136
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426
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427 private void IoLib() {} // never
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428 }