Mercurial Hosting > luan
annotate src/luan/lib/IoLib.java @ 115:eacf6ce1b47d
add IoLib
git-svn-id: https://luan-java.googlecode.com/svn/trunk@116 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Thu, 29 May 2014 09:26:44 +0000 |
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children | 1ff1c32417eb |
rev | line source |
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115
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1 package luan.lib; |
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2 |
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3 import java.io.OutputStream; |
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4 import java.io.PrintStream; |
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5 import java.io.Reader; |
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6 import java.io.Writer; |
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7 import java.io.FileReader; |
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8 import java.io.FileWriter; |
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9 import java.io.BufferedReader; |
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10 import java.io.File; |
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11 import java.io.FileOutputStream; |
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12 import java.io.InputStreamReader; |
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13 import java.io.IOException; |
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14 import luan.LuanState; |
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15 import luan.LuanTable; |
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16 import luan.LuanFunction; |
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17 import luan.LuanJavaFunction; |
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18 import luan.LuanException; |
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19 |
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20 |
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21 public final class IoLib { |
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22 |
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23 public static final String NAME = "Io"; |
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24 |
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25 public static final LuanFunction LOADER = new LuanFunction() { |
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26 @Override public Object call(LuanState luan,Object[] args) { |
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27 LuanTable module = new LuanTable(); |
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28 try { |
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29 add( module, "file", String.class ); |
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30 |
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31 LuanTable stdin = new LuanTable(); |
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32 stdin.put( "read_text", new LuanJavaFunction( |
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33 IoLib.class.getMethod( "stdin_read_text" ), null |
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34 ) ); |
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35 stdin.put( "read_binary", new LuanJavaFunction( |
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36 IoLib.class.getMethod( "stdin_read_binary" ), null |
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37 ) ); |
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38 stdin.put( "read_lines", new LuanJavaFunction( |
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39 IoLib.class.getMethod( "stdin_read_lines" ), null |
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40 ) ); |
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41 module.put( "stdin", stdin ); |
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42 } catch(NoSuchMethodException e) { |
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43 throw new RuntimeException(e); |
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44 } |
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45 module.put( "stdout", writer(System.out) ); |
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46 module.put( "stderr", writer(System.err) ); |
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47 return module; |
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48 } |
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49 }; |
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50 |
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51 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException { |
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52 t.put( method, new LuanJavaFunction(IoLib.class.getMethod(method,parameterTypes),null) ); |
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53 } |
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54 |
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55 public static final class LuanFile { |
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56 private final File file; |
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57 |
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58 private LuanFile(String name) { |
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59 this.file = new File(name); |
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60 } |
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61 |
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62 public String read_text() throws IOException { |
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63 return Utils.read(file); |
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64 } |
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65 |
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66 public byte[] read_binary() throws IOException { |
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67 return Utils.readAll(file); |
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68 } |
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69 |
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70 public void write(LuanState luan,Object obj) throws LuanException, IOException { |
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71 if( obj instanceof String ) { |
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72 String s = (String)obj; |
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73 Utils.write(file,s); |
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74 return; |
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75 } |
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76 if( obj instanceof byte[] ) { |
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77 byte[] a = (byte[])obj; |
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78 Utils.writeAll(file,a); |
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79 return; |
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80 } |
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81 throw luan.JAVA.exception( "bad argument #1 to 'write' (string or binary expected)" ); |
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82 } |
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83 |
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84 public LuanTable text_writer() throws IOException { |
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85 return writer(new FileWriter(file)); |
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86 } |
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87 |
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88 public LuanTable binary_writer() throws IOException { |
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89 return binaryWriter(new FileOutputStream(file)); |
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90 } |
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91 |
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92 public LuanFunction read_lines() throws IOException { |
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93 return lines(new BufferedReader(new FileReader(file))); |
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94 } |
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95 } |
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96 |
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97 public static LuanTable file(String name) { |
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98 LuanTable tbl = new LuanTable(); |
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99 LuanFile file = new LuanFile(name); |
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100 try { |
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101 tbl.put( "read_text", new LuanJavaFunction( |
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102 LuanFile.class.getMethod( "read_text" ), file |
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103 ) ); |
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104 tbl.put( "read_binary", new LuanJavaFunction( |
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105 LuanFile.class.getMethod( "read_binary" ), file |
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106 ) ); |
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107 tbl.put( "write", new LuanJavaFunction( |
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108 LuanFile.class.getMethod( "write", LuanState.class, Object.class ), file |
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109 ) ); |
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110 tbl.put( "text_writer", new LuanJavaFunction( |
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111 LuanFile.class.getMethod( "text_writer" ), file |
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112 ) ); |
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113 tbl.put( "binary_writer", new LuanJavaFunction( |
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114 LuanFile.class.getMethod( "binary_writer" ), file |
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115 ) ); |
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116 tbl.put( "read_lines", new LuanJavaFunction( |
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117 LuanFile.class.getMethod( "read_lines" ), file |
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118 ) ); |
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119 } catch(NoSuchMethodException e) { |
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120 throw new RuntimeException(e); |
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121 } |
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122 return tbl; |
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123 } |
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124 |
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125 |
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126 public String stdin_read_text() throws IOException { |
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127 return Utils.readAll(new InputStreamReader(System.in)); |
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128 } |
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129 |
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130 public byte[] stdin_read_binary() throws IOException { |
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131 return Utils.readAll(System.in); |
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132 } |
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133 |
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134 public LuanFunction stdin_read_lines() throws IOException { |
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135 return lines(new BufferedReader(new InputStreamReader(System.in))); |
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136 } |
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137 |
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138 |
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139 public interface LuanWriter { |
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140 public void write(LuanState luan,Object... args) throws LuanException, IOException; |
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141 public void close() throws IOException; |
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142 } |
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143 |
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144 public static LuanTable writer(final PrintStream out) { |
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145 LuanWriter luanWriter = new LuanWriter() { |
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146 |
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147 public void write(LuanState luan,Object... args) throws LuanException { |
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148 for( Object obj : args ) { |
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149 out.print( luan.JAVA.toString(obj) ); |
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150 } |
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151 } |
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152 |
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153 public void close() { |
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154 out.close(); |
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155 } |
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156 }; |
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157 return writer(luanWriter); |
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158 } |
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159 |
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160 public static LuanTable writer(final Writer out) { |
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161 LuanWriter luanWriter = new LuanWriter() { |
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162 |
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163 public void write(LuanState luan,Object... args) throws LuanException, IOException { |
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164 for( Object obj : args ) { |
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165 out.write( luan.JAVA.toString(obj) ); |
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166 } |
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167 } |
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168 |
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169 public void close() throws IOException { |
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170 out.close(); |
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171 } |
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172 }; |
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173 return writer(luanWriter); |
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174 } |
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175 |
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176 private static LuanTable writer(LuanWriter luanWriter) { |
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177 LuanTable writer = new LuanTable(); |
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178 try { |
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179 writer.put( "write", new LuanJavaFunction( |
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180 LuanWriter.class.getMethod( "write", LuanState.class, new Object[0].getClass() ), luanWriter |
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181 ) ); |
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182 writer.put( "close", new LuanJavaFunction( |
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183 LuanWriter.class.getMethod( "close" ), luanWriter |
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184 ) ); |
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185 } catch(NoSuchMethodException e) { |
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186 throw new RuntimeException(e); |
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187 } |
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188 return writer; |
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189 } |
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190 |
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191 |
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192 public static LuanTable binaryWriter(final OutputStream out) { |
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193 LuanTable writer = new LuanTable(); |
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194 try { |
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195 writer.put( "write", new LuanJavaFunction( |
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196 OutputStream.class.getMethod( "write", new byte[0].getClass() ), out |
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197 ) ); |
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198 writer.put( "close", new LuanJavaFunction( |
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199 OutputStream.class.getMethod( "close" ), out |
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200 ) ); |
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201 } catch(NoSuchMethodException e) { |
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202 throw new RuntimeException(e); |
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203 } |
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204 return writer; |
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205 } |
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206 |
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207 public static LuanFunction lines(final BufferedReader in) { |
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208 return new LuanFunction() { |
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209 public Object call(LuanState luan,Object[] args) throws LuanException { |
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210 try { |
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211 if( args.length==1 && "close".equals(args[0]) ) { |
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212 in.close(); |
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213 return null; |
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214 } |
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215 String rtn = in.readLine(); |
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216 if( rtn==null ) |
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217 in.close(); |
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218 return rtn; |
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219 } catch(IOException e) { |
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220 throw luan.JAVA.exception(e); |
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221 } |
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222 } |
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223 }; |
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224 } |
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225 |
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226 } |