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annotate src/luan/lib/IoLib.java @ 143:fcb81fa2df0d

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handle urls and java resources as files git-svn-id: https://luan-java.googlecode.com/svn/trunk@144 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 13 Jun 2014 19:04:05 +0000
parents 05f8c21160ef
children 2e92f0a6fcac
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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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33
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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", LuanState.class, String.class );
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41 add( module, "read_console_line", String.class );
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43 LuanTable stdin = new LuanTable();
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44 stdin.put( "read_text", new LuanJavaFunction(
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45 IoLib.class.getMethod( "stdin_read_text" ), null
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46 ) );
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47 stdin.put( "read_binary", new LuanJavaFunction(
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48 IoLib.class.getMethod( "stdin_read_binary" ), null
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49 ) );
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50 stdin.put( "read_lines", new LuanJavaFunction(
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51 IoLib.class.getMethod( "stdin_read_lines" ), null
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52 ) );
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53 stdin.put( "read_blocks", new LuanJavaFunction(
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54 IoLib.class.getMethod( "stdin_read_blocks", Integer.class ), null
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55 ) );
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56 module.put( "stdin", stdin );
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57
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58 add( module, "socket", String.class, Integer.TYPE );
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59 add( module, "socket_server", Integer.TYPE );
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60 } catch(NoSuchMethodException e) {
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61 throw new RuntimeException(e);
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62 }
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63 module.put( "stdout", textWriter(System.out) );
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64 module.put( "stderr", textWriter(System.err) );
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65 return module;
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66 }
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67 };
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69 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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70 t.put( method, new LuanJavaFunction(IoLib.class.getMethod(method,parameterTypes),null) );
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71 }
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72
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74 public static String stdin_read_text() throws IOException {
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75 return Utils.readAll(new InputStreamReader(System.in));
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76 }
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78 public static byte[] stdin_read_binary() throws IOException {
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79 return Utils.readAll(System.in);
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80 }
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81
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82 public static LuanFunction stdin_read_lines() throws IOException {
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83 return lines(new BufferedReader(new InputStreamReader(System.in)));
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84 }
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86 public static LuanFunction stdin_read_blocks(Integer blockSize) throws IOException {
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87 int n = blockSize!=null ? blockSize : Utils.bufSize;
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88 return blocks(System.in,n);
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89 }
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91 public static String read_console_line(String prompt) throws IOException {
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92 if( prompt==null )
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93 prompt = "> ";
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94 return System.console().readLine(prompt);
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95 }
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98 public interface LuanWriter {
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99 public void write(LuanState luan,Object... args) throws LuanException, IOException;
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100 public void close() throws IOException;
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101 }
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102
122
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103 public static LuanTable textWriter(final PrintStream out) {
115
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104 LuanWriter luanWriter = new LuanWriter() {
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105
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106 public void write(LuanState luan,Object... args) throws LuanException {
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107 for( Object obj : args ) {
130
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108 out.print( luan.toString(obj) );
115
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109 }
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110 }
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111
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112 public void close() {
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113 out.close();
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114 }
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115 };
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116 return writer(luanWriter);
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117 }
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118
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119 public static LuanTable textWriter(final Writer out) {
115
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120 LuanWriter luanWriter = new LuanWriter() {
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121
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122 public void write(LuanState luan,Object... args) throws LuanException, IOException {
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123 for( Object obj : args ) {
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124 out.write( luan.toString(obj) );
115
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125 }
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126 }
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127
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128 public void close() throws IOException {
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129 out.close();
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130 }
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131 };
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132 return writer(luanWriter);
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133 }
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134
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135 private static LuanTable writer(LuanWriter luanWriter) {
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136 LuanTable writer = new LuanTable();
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137 try {
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138 writer.put( "write", new LuanJavaFunction(
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139 LuanWriter.class.getMethod( "write", LuanState.class, new Object[0].getClass() ), luanWriter
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140 ) );
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141 writer.put( "close", new LuanJavaFunction(
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142 LuanWriter.class.getMethod( "close" ), luanWriter
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143 ) );
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144 } catch(NoSuchMethodException e) {
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145 throw new RuntimeException(e);
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146 }
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147 return writer;
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148 }
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149
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150
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151 public static LuanTable binaryWriter(final OutputStream out) {
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152 LuanTable writer = new LuanTable();
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153 try {
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154 writer.put( "write", new LuanJavaFunction(
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155 OutputStream.class.getMethod( "write", new byte[0].getClass() ), out
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156 ) );
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157 writer.put( "close", new LuanJavaFunction(
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158 OutputStream.class.getMethod( "close" ), out
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159 ) );
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160 } catch(NoSuchMethodException e) {
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161 throw new RuntimeException(e);
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162 }
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163 return writer;
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164 }
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165
116
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166 static LuanFunction lines(final BufferedReader in) {
115
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167 return new LuanFunction() {
116
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168 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
115
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169 try {
116
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170 if( args.length > 0 ) {
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171 if( args.length > 1 || !"close".equals(args[0]) )
130
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172 throw luan.exception( "the only argument allowed is 'close'" );
115
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173 in.close();
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174 return null;
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175 }
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176 String rtn = in.readLine();
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177 if( rtn==null )
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178 in.close();
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179 return rtn;
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180 } catch(IOException e) {
130
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181 throw luan.exception(e);
115
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182 }
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183 }
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184 };
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185 }
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186
116
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187 static LuanFunction blocks(final InputStream in,final int blockSize) {
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188 return new LuanFunction() {
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189 final byte[] a = new byte[blockSize];
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190
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191 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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192 try {
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193 if( args.length > 0 ) {
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194 if( args.length > 1 || !"close".equals(args[0]) )
130
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195 throw luan.exception( "the only argument allowed is 'close'" );
116
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196 in.close();
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197 return null;
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198 }
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199 if( in.read(a) == -1 ) {
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200 in.close();
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201 return null;
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202 }
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203 return a;
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204 } catch(IOException e) {
130
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205 throw luan.exception(e);
116
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206 }
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207 }
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208 };
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209 }
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210
125
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211
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212
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213 public static abstract class LuanIn {
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214 abstract InputStream inputStream() throws IOException;
143
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215 abstract String name();
125
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216
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217 public String read_text() throws IOException {
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218 Reader in = new InputStreamReader(inputStream());
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219 String s = Utils.readAll(in);
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220 in.close();
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221 return s;
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222 }
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223
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224 public byte[] read_binary() throws IOException {
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225 InputStream in = inputStream();
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226 byte[] a = Utils.readAll(in);
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227 in.close();
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228 return a;
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229 }
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230
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231 public LuanFunction read_lines() throws IOException {
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232 return lines(new BufferedReader(new InputStreamReader(inputStream())));
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233 }
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234
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235 public LuanFunction read_blocks(Integer blockSize) throws IOException {
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236 int n = blockSize!=null ? blockSize : Utils.bufSize;
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237 return blocks(inputStream(),n);
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238 }
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239
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240 LuanTable table() {
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241 LuanTable tbl = new LuanTable();
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242 try {
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243 tbl.put( "name", new LuanJavaFunction(
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244 LuanIn.class.getMethod( "name" ), this
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245 ) );
125
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246 tbl.put( "read_text", new LuanJavaFunction(
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247 LuanIn.class.getMethod( "read_text" ), this
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248 ) );
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249 tbl.put( "read_binary", new LuanJavaFunction(
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250 LuanIn.class.getMethod( "read_binary" ), this
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251 ) );
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252 tbl.put( "read_lines", new LuanJavaFunction(
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253 LuanIn.class.getMethod( "read_lines" ), this
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254 ) );
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255 tbl.put( "read_blocks", new LuanJavaFunction(
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256 LuanIn.class.getMethod( "read_blocks", Integer.class ), this
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257 ) );
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258 } catch(NoSuchMethodException e) {
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259 throw new RuntimeException(e);
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260 }
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261 return tbl;
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262 }
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263 }
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264
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265 public static abstract class LuanIO extends LuanIn {
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266 abstract OutputStream outputStream() throws IOException;
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267
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268 public void write(LuanState luan,Object obj) throws LuanException, IOException {
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269 if( obj instanceof String ) {
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270 String s = (String)obj;
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271 Writer out = new OutputStreamWriter(outputStream());
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272 out.write(s);
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273 out.close();
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274 return;
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275 }
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276 if( obj instanceof byte[] ) {
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277 byte[] a = (byte[])obj;
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278 OutputStream out = outputStream();
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279 Utils.copyAll(new ByteArrayInputStream(a),out);
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280 out.close();
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281 return;
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282 }
130
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283 throw luan.exception( "bad argument #1 to 'write' (string or binary expected)" );
125
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284 }
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285
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286 public LuanTable text_writer() throws IOException {
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287 return textWriter(new BufferedWriter(new OutputStreamWriter(outputStream())));
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288 }
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289
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290 public LuanTable binary_writer() throws IOException {
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291 return binaryWriter(new BufferedOutputStream(outputStream()));
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292 }
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293
129
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294 @Override LuanTable table() {
125
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295 LuanTable tbl = super.table();
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296 try {
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297 tbl.put( "write", new LuanJavaFunction(
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298 LuanIO.class.getMethod( "write", LuanState.class, Object.class ), this
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299 ) );
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300 tbl.put( "text_writer", new LuanJavaFunction(
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301 LuanIO.class.getMethod( "text_writer" ), this
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302 ) );
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303 tbl.put( "binary_writer", new LuanJavaFunction(
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304 LuanIO.class.getMethod( "binary_writer" ), this
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305 ) );
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306 } catch(NoSuchMethodException e) {
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307 throw new RuntimeException(e);
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308 }
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309 return tbl;
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310 }
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311 }
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312
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313 public static final class LuanUrl extends LuanIn {
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314 private final URL url;
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315
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316 public LuanUrl(String s) throws MalformedURLException {
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317 this.url = new URL(s);
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318 }
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319
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320 InputStream inputStream() throws IOException {
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321 return url.openStream();
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322 }
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323
143
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324 String name() {
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325 return url.toString();
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326 }
125
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327 }
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328
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329 public static final class LuanFile extends LuanIO {
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330 private final File file;
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331
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332 public LuanFile(String name) {
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333 this.file = new File(name);
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334 }
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335
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336 InputStream inputStream() throws IOException {
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337 return new FileInputStream(file);
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338 }
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339
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340 OutputStream outputStream() throws IOException {
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341 return new FileOutputStream(file);
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342 }
143
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343
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344 String name() {
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345 return file.toString();
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346 }
125
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347 }
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348
143
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349 public static LuanIn luanIo(LuanState luan,String name) throws LuanException {
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350 if( Utils.isFile(name) )
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351 return new LuanFile(name);
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352 String url = Utils.toUrl(name);
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diff changeset
353 if( url == null )
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354 throw luan.exception( "file '"+name+"' not found" );
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diff changeset
355 try {
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356 return new LuanUrl(url);
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357 } catch(MalformedURLException e) {
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diff changeset
358 throw new RuntimeException(e);
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359 }
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diff changeset
360 }
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diff changeset
361
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diff changeset
362 public static LuanTable file(LuanState luan,String name) throws LuanException {
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diff changeset
363 return luanIo(luan,name).table();
125
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364 }
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diff changeset
365
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366 public static final class LuanSocket extends LuanIO {
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367 private final Socket socket;
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diff changeset
368
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369 public LuanSocket(String host,int port) throws IOException {
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diff changeset
370 this(new Socket(host,port));
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diff changeset
371 }
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diff changeset
372
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373 public LuanSocket(Socket socket) throws IOException {
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diff changeset
374 this.socket = socket;
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diff changeset
375 }
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diff changeset
376
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diff changeset
377 InputStream inputStream() throws IOException {
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diff changeset
378 return socket.getInputStream();
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379 }
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parents: 124
diff changeset
380
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diff changeset
381 OutputStream outputStream() throws IOException {
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diff changeset
382 return socket.getOutputStream();
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parents: 124
diff changeset
383 }
129
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parents: 125
diff changeset
384
143
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diff changeset
385 String name() {
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diff changeset
386 return socket.toString();
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diff changeset
387 }
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parents: 142
diff changeset
388
129
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diff changeset
389 public LuanTable pickle_client(LuanState luan) throws IOException {
486a0641bca4 add pickle client/server;
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diff changeset
390 DataInputStream in = new DataInputStream(new BufferedInputStream(inputStream()));
486a0641bca4 add pickle client/server;
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diff changeset
391 DataOutputStream out = new DataOutputStream(new BufferedOutputStream(outputStream()));
486a0641bca4 add pickle client/server;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
392 return new PickleClient(luan,in,out).table();
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diff changeset
393 }
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diff changeset
394
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diff changeset
395 public void run_pickle_server(LuanState luan) throws IOException {
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diff changeset
396 DataInputStream in = new DataInputStream(new BufferedInputStream(inputStream()));
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diff changeset
397 DataOutputStream out = new DataOutputStream(new BufferedOutputStream(outputStream()));
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diff changeset
398 new PickleServer(luan,in,out).run();
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diff changeset
399 }
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parents: 125
diff changeset
400
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parents: 125
diff changeset
401 @Override LuanTable table() {
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diff changeset
402 LuanTable tbl = super.table();
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diff changeset
403 try {
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diff changeset
404 tbl.put( "pickle_client", new LuanJavaFunction(
486a0641bca4 add pickle client/server;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 125
diff changeset
405 LuanSocket.class.getMethod( "pickle_client", LuanState.class ), this
486a0641bca4 add pickle client/server;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 125
diff changeset
406 ) );
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parents: 125
diff changeset
407 tbl.put( "run_pickle_server", new LuanJavaFunction(
486a0641bca4 add pickle client/server;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 125
diff changeset
408 LuanSocket.class.getMethod( "run_pickle_server", LuanState.class ), this
486a0641bca4 add pickle client/server;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 125
diff changeset
409 ) );
486a0641bca4 add pickle client/server;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 125
diff changeset
410 } catch(NoSuchMethodException e) {
486a0641bca4 add pickle client/server;
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parents: 125
diff changeset
411 throw new RuntimeException(e);
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parents: 125
diff changeset
412 }
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 125
diff changeset
413 return tbl;
486a0641bca4 add pickle client/server;
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parents: 125
diff changeset
414 }
125
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parents: 124
diff changeset
415 }
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parents: 124
diff changeset
416
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 124
diff changeset
417 public static LuanTable socket(String host,int port) throws IOException {
0cd559a16758 add sockets
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 124
diff changeset
418 return new LuanSocket(host,port).table();
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419 }
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420
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421 public static LuanFunction socket_server(int port) throws IOException {
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422 final ServerSocket ss = new ServerSocket(port);
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423 return new LuanFunction() {
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424 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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425 try {
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426 if( args.length > 0 ) {
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427 if( args.length > 1 || !"close".equals(args[0]) )
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428 throw luan.exception( "the only argument allowed is 'close'" );
125
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429 ss.close();
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430 return null;
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431 }
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432 return new LuanSocket(ss.accept()).table();
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433 } catch(IOException e) {
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434 throw luan.exception(e);
125
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435 }
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436 }
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437 };
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438 }
136
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439
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440 private void IoLib() {} // never
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441 }