Mercurial Hosting > luan
annotate src/org/eclipse/jetty/util/IO.java @ 854:359012f4e797
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 20 Sep 2016 01:05:37 -0600 |
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children | 2bb375e94f64 |
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1 // |
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2 // ======================================================================== |
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
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4 // ------------------------------------------------------------------------ |
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5 // All rights reserved. This program and the accompanying materials |
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6 // are made available under the terms of the Eclipse Public License v1.0 |
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7 // and Apache License v2.0 which accompanies this distribution. |
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8 // |
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9 // The Eclipse Public License is available at |
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10 // http://www.eclipse.org/legal/epl-v10.html |
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11 // |
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12 // The Apache License v2.0 is available at |
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13 // http://www.opensource.org/licenses/apache2.0.php |
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14 // |
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15 // You may elect to redistribute this code under either of these licenses. |
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16 // ======================================================================== |
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17 // |
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18 |
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19 package org.eclipse.jetty.util; |
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20 import java.io.ByteArrayOutputStream; |
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21 import java.io.Closeable; |
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22 import java.io.File; |
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23 import java.io.FileInputStream; |
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24 import java.io.FileOutputStream; |
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25 import java.io.IOException; |
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26 import java.io.InputStream; |
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27 import java.io.InputStreamReader; |
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28 import java.io.OutputStream; |
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29 import java.io.PrintWriter; |
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30 import java.io.Reader; |
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31 import java.io.StringWriter; |
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32 import java.io.Writer; |
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33 |
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34 import org.slf4j.Logger; |
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35 import org.slf4j.LoggerFactory; |
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36 import org.eclipse.jetty.util.thread.QueuedThreadPool; |
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37 |
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38 /* ======================================================================== */ |
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39 /** IO Utilities. |
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40 * Provides stream handling utilities in |
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41 * singleton Threadpool implementation accessed by static members. |
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42 */ |
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43 public class IO |
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44 { |
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45 private static final Logger LOG = LoggerFactory.getLogger(IO.class); |
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46 |
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47 /* ------------------------------------------------------------------- */ |
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48 public final static String |
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49 CRLF = "\015\012"; |
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50 |
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51 /* ------------------------------------------------------------------- */ |
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52 public final static byte[] |
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53 CRLF_BYTES = {(byte)'\015',(byte)'\012'}; |
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54 |
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55 /* ------------------------------------------------------------------- */ |
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56 public static int bufferSize = 64*1024; |
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57 |
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58 /* ------------------------------------------------------------------- */ |
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59 // TODO get rid of this singleton! |
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60 private static class Singleton { |
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61 static final QueuedThreadPool __pool=new QueuedThreadPool(); |
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62 static |
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63 { |
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64 try{__pool.start();} |
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65 catch(Exception e){LOG.warn("",e); System.exit(1);} |
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66 } |
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67 } |
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68 |
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69 /* ------------------------------------------------------------------- */ |
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70 static class Job implements Runnable |
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71 { |
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72 InputStream in; |
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73 OutputStream out; |
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74 Reader read; |
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75 Writer write; |
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76 |
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77 Job(InputStream in,OutputStream out) |
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78 { |
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79 this.in=in; |
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80 this.out=out; |
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81 this.read=null; |
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82 this.write=null; |
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83 } |
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84 Job(Reader read,Writer write) |
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85 { |
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86 this.in=null; |
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87 this.out=null; |
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88 this.read=read; |
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89 this.write=write; |
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90 } |
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91 |
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92 /* ------------------------------------------------------------ */ |
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93 /* |
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94 * @see java.lang.Runnable#run() |
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95 */ |
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96 public void run() |
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97 { |
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98 try { |
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99 if (in!=null) |
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100 copy(in,out,-1); |
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101 else |
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102 copy(read,write,-1); |
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103 } |
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104 catch(IOException e) |
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105 { |
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106 LOG.trace("",e); |
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107 try{ |
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108 if (out!=null) |
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109 out.close(); |
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110 if (write!=null) |
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111 write.close(); |
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112 } |
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113 catch(IOException e2) |
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114 { |
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115 LOG.trace("",e2); |
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116 } |
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117 } |
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118 } |
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119 } |
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120 |
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121 /* ------------------------------------------------------------------- */ |
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122 /** Copy Stream in to Stream out until EOF or exception. |
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123 * in own thread |
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124 */ |
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125 public static void copyThread(InputStream in, OutputStream out) |
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126 { |
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127 try{ |
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128 Job job=new Job(in,out); |
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129 if (!Singleton.__pool.dispatch(job)) |
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130 job.run(); |
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131 } |
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132 catch(Exception e) |
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133 { |
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134 LOG.warn("",e); |
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135 } |
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136 } |
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137 |
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138 /* ------------------------------------------------------------------- */ |
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139 /** Copy Stream in to Stream out until EOF or exception. |
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140 */ |
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141 public static void copy(InputStream in, OutputStream out) |
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142 throws IOException |
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143 { |
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144 copy(in,out,-1); |
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145 } |
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146 |
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147 /* ------------------------------------------------------------------- */ |
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148 /** Copy Stream in to Stream out until EOF or exception |
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149 * in own thread |
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150 */ |
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151 public static void copyThread(Reader in, Writer out) |
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152 { |
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153 try |
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154 { |
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155 Job job=new Job(in,out); |
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156 if (!Singleton.__pool.dispatch(job)) |
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157 job.run(); |
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158 } |
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159 catch(Exception e) |
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160 { |
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161 LOG.warn("",e); |
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162 } |
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163 } |
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164 |
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165 /* ------------------------------------------------------------------- */ |
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166 /** Copy Reader to Writer out until EOF or exception. |
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167 */ |
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168 public static void copy(Reader in, Writer out) |
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169 throws IOException |
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170 { |
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171 copy(in,out,-1); |
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172 } |
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173 |
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174 /* ------------------------------------------------------------------- */ |
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175 /** Copy Stream in to Stream for byteCount bytes or until EOF or exception. |
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176 */ |
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177 public static void copy(InputStream in, |
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178 OutputStream out, |
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179 long byteCount) |
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180 throws IOException |
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181 { |
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182 byte buffer[] = new byte[bufferSize]; |
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183 int len=bufferSize; |
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184 |
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185 if (byteCount>=0) |
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186 { |
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187 while (byteCount>0) |
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188 { |
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189 int max = byteCount<bufferSize?(int)byteCount:bufferSize; |
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190 len=in.read(buffer,0,max); |
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191 |
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192 if (len==-1) |
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193 break; |
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194 |
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195 byteCount -= len; |
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196 out.write(buffer,0,len); |
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197 } |
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198 } |
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199 else |
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200 { |
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201 while (true) |
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202 { |
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203 len=in.read(buffer,0,bufferSize); |
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204 if (len<0 ) |
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205 break; |
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206 out.write(buffer,0,len); |
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207 } |
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208 } |
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209 } |
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210 |
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211 /* ------------------------------------------------------------------- */ |
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212 /** Copy Reader to Writer for byteCount bytes or until EOF or exception. |
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213 */ |
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214 public static void copy(Reader in, |
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215 Writer out, |
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216 long byteCount) |
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217 throws IOException |
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218 { |
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219 char buffer[] = new char[bufferSize]; |
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220 int len=bufferSize; |
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221 |
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222 if (byteCount>=0) |
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223 { |
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224 while (byteCount>0) |
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225 { |
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226 if (byteCount<bufferSize) |
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227 len=in.read(buffer,0,(int)byteCount); |
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228 else |
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229 len=in.read(buffer,0,bufferSize); |
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230 |
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231 if (len==-1) |
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232 break; |
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233 |
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234 byteCount -= len; |
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235 out.write(buffer,0,len); |
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236 } |
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237 } |
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238 else if (out instanceof PrintWriter) |
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239 { |
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240 PrintWriter pout=(PrintWriter)out; |
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241 while (!pout.checkError()) |
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242 { |
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243 len=in.read(buffer,0,bufferSize); |
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244 if (len==-1) |
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245 break; |
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246 out.write(buffer,0,len); |
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247 } |
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248 } |
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249 else |
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250 { |
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251 while (true) |
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252 { |
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253 len=in.read(buffer,0,bufferSize); |
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254 if (len==-1) |
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255 break; |
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256 out.write(buffer,0,len); |
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257 } |
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258 } |
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259 } |
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260 |
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261 /* ------------------------------------------------------------ */ |
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262 /** Copy files or directories |
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263 * @param from |
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264 * @param to |
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265 * @throws IOException |
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266 */ |
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267 public static void copy(File from,File to) throws IOException |
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268 { |
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269 if (from.isDirectory()) |
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270 copyDir(from,to); |
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271 else |
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272 copyFile(from,to); |
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273 } |
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274 |
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275 /* ------------------------------------------------------------ */ |
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276 public static void copyDir(File from,File to) throws IOException |
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277 { |
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278 if (to.exists()) |
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279 { |
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280 if (!to.isDirectory()) |
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281 throw new IllegalArgumentException(to.toString()); |
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282 } |
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283 else |
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284 to.mkdirs(); |
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285 |
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286 File[] files = from.listFiles(); |
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287 if (files!=null) |
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288 { |
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289 for (int i=0;i<files.length;i++) |
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290 { |
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291 String name = files[i].getName(); |
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292 if (".".equals(name) || "..".equals(name)) |
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293 continue; |
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294 copy(files[i],new File(to,name)); |
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295 } |
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296 } |
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297 } |
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298 |
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299 /* ------------------------------------------------------------ */ |
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300 public static void copyFile(File from,File to) throws IOException |
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301 { |
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302 FileInputStream in=new FileInputStream(from); |
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303 FileOutputStream out=new FileOutputStream(to); |
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304 copy(in,out); |
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305 in.close(); |
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306 out.close(); |
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307 } |
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308 |
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309 /* ------------------------------------------------------------ */ |
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310 /** Read input stream to string. |
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311 */ |
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312 public static String toString(InputStream in) |
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313 throws IOException |
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314 { |
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315 return toString(in,null); |
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316 } |
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317 |
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318 /* ------------------------------------------------------------ */ |
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319 /** Read input stream to string. |
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320 */ |
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321 public static String toString(InputStream in,String encoding) |
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322 throws IOException |
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323 { |
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324 StringWriter writer=new StringWriter(); |
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325 InputStreamReader reader = encoding==null?new InputStreamReader(in):new InputStreamReader(in,encoding); |
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326 |
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327 copy(reader,writer); |
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328 return writer.toString(); |
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329 } |
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330 |
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331 /* ------------------------------------------------------------ */ |
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332 /** Read input stream to string. |
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333 */ |
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334 public static String toString(Reader in) |
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335 throws IOException |
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336 { |
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337 StringWriter writer=new StringWriter(); |
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338 copy(in,writer); |
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339 return writer.toString(); |
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340 } |
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341 |
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342 |
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343 /* ------------------------------------------------------------ */ |
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344 /** Delete File. |
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345 * This delete will recursively delete directories - BE CAREFULL |
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346 * @param file The file to be deleted. |
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347 */ |
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348 public static boolean delete(File file) |
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349 { |
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350 if (!file.exists()) |
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351 return false; |
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352 if (file.isDirectory()) |
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353 { |
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354 File[] files = file.listFiles(); |
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355 for (int i=0;files!=null && i<files.length;i++) |
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356 delete(files[i]); |
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357 } |
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358 return file.delete(); |
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359 } |
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360 |
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361 /* ------------------------------------------------------------ */ |
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362 /** |
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363 * closes any {@link Closeable} |
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364 * |
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365 * @param c the closeable to close |
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366 */ |
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367 public static void close(Closeable c) |
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368 { |
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369 try |
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370 { |
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371 if (c != null) |
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372 c.close(); |
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373 } |
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374 catch (IOException e) |
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375 { |
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376 LOG.trace("",e); |
802
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|
377 } |
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|
378 } |
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379 |
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380 /** |
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381 * closes an input stream, and logs exceptions |
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382 * |
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383 * @param is the input stream to close |
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384 */ |
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385 public static void close(InputStream is) |
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386 { |
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387 try |
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388 { |
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389 if (is != null) |
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390 is.close(); |
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391 } |
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392 catch (IOException e) |
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393 { |
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394 LOG.trace("",e); |
802
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395 } |
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396 } |
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397 |
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398 /** |
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399 * closes a reader, and logs exceptions |
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400 * |
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401 * @param reader the reader to close |
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402 */ |
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403 public static void close(Reader reader) |
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404 { |
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405 try |
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406 { |
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407 if (reader != null) |
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408 reader.close(); |
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409 } catch (IOException e) |
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parents:
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|
410 { |
820
8e9db0bbf4f9
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Franklin Schmidt <fschmidt@gmail.com>
parents:
802
diff
changeset
|
411 LOG.trace("",e); |
802
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|
412 } |
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parents:
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|
413 } |
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parents:
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|
414 |
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parents:
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|
415 /** |
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416 * closes a writer, and logs exceptions |
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|
417 * |
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418 * @param writer the writer to close |
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419 */ |
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420 public static void close(Writer writer) |
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|
421 { |
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422 try |
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parents:
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|
423 { |
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parents:
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|
424 if (writer != null) |
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parents:
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|
425 writer.close(); |
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|
426 } catch (IOException e) |
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|
427 { |
820
8e9db0bbf4f9
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parents:
802
diff
changeset
|
428 LOG.trace("",e); |
802
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parents:
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|
429 } |
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parents:
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|
430 } |
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|
431 |
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|
432 /* ------------------------------------------------------------ */ |
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433 public static byte[] readBytes(InputStream in) |
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|
434 throws IOException |
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parents:
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|
435 { |
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|
436 ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
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|
437 copy(in,bout); |
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|
438 return bout.toByteArray(); |
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parents:
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|
439 } |
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parents:
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|
440 |
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|
441 /* ------------------------------------------------------------ */ |
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442 /** |
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443 * closes an output stream, and logs exceptions |
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444 * |
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445 * @param os the output stream to close |
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446 */ |
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447 public static void close(OutputStream os) |
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448 { |
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449 try |
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450 { |
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451 if (os != null) |
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452 os.close(); |
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453 } |
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454 catch (IOException e) |
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455 { |
820
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456 LOG.trace("",e); |
802
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457 } |
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458 } |
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459 |
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460 /* ------------------------------------------------------------ */ |
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461 /** |
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462 * @return An outputstream to nowhere |
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463 */ |
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464 public static OutputStream getNullStream() |
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465 { |
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466 return __nullStream; |
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467 } |
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468 |
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469 /* ------------------------------------------------------------ */ |
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470 /** |
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471 * @return An outputstream to nowhere |
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472 */ |
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473 public static InputStream getClosedStream() |
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474 { |
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475 return __closedStream; |
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476 } |
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477 |
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478 /* ------------------------------------------------------------ */ |
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479 /* ------------------------------------------------------------ */ |
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480 private static class NullOS extends OutputStream |
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481 { |
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482 @Override |
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483 public void close(){} |
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484 @Override |
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485 public void flush(){} |
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486 @Override |
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487 public void write(byte[]b){} |
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488 @Override |
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489 public void write(byte[]b,int i,int l){} |
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490 @Override |
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491 public void write(int b){} |
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492 } |
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493 private static NullOS __nullStream = new NullOS(); |
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494 |
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495 |
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496 /* ------------------------------------------------------------ */ |
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497 /* ------------------------------------------------------------ */ |
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498 private static class ClosedIS extends InputStream |
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499 { |
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500 @Override |
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501 public int read() throws IOException |
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502 { |
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503 return -1; |
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|
504 } |
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505 } |
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506 private static ClosedIS __closedStream = new ClosedIS(); |
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507 |
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508 /* ------------------------------------------------------------ */ |
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parents:
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509 /** |
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|
510 * @return An writer to nowhere |
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|
511 */ |
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|
512 public static Writer getNullWriter() |
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|
513 { |
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514 return __nullWriter; |
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|
515 } |
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516 |
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517 /* ------------------------------------------------------------ */ |
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parents:
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518 /** |
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|
519 * @return An writer to nowhere |
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|
520 */ |
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521 public static PrintWriter getNullPrintWriter() |
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522 { |
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523 return __nullPrintWriter; |
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524 } |
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525 |
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526 /* ------------------------------------------------------------ */ |
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527 /* ------------------------------------------------------------ */ |
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parents:
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528 private static class NullWrite extends Writer |
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parents:
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529 { |
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|
530 @Override |
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|
531 public void close(){} |
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|
532 @Override |
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533 public void flush(){} |
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534 @Override |
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535 public void write(char[]b){} |
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Franklin Schmidt <fschmidt@gmail.com>
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|
536 @Override |
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537 public void write(char[]b,int o,int l){} |
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538 @Override |
3428c60d7cfc
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Franklin Schmidt <fschmidt@gmail.com>
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539 public void write(int b){} |
3428c60d7cfc
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Franklin Schmidt <fschmidt@gmail.com>
parents:
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|
540 @Override |
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Franklin Schmidt <fschmidt@gmail.com>
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|
541 public void write(String s){} |
3428c60d7cfc
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parents:
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542 @Override |
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Franklin Schmidt <fschmidt@gmail.com>
parents:
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|
543 public void write(String s,int o,int l){} |
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Franklin Schmidt <fschmidt@gmail.com>
parents:
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|
544 } |
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|
545 private static NullWrite __nullWriter = new NullWrite(); |
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Franklin Schmidt <fschmidt@gmail.com>
parents:
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|
546 private static PrintWriter __nullPrintWriter = new PrintWriter(__nullWriter); |
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parents:
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547 } |
3428c60d7cfc
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Franklin Schmidt <fschmidt@gmail.com>
parents:
diff
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|
548 |
3428c60d7cfc
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parents:
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|
549 |
3428c60d7cfc
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parents:
diff
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|
550 |
3428c60d7cfc
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Franklin Schmidt <fschmidt@gmail.com>
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551 |
3428c60d7cfc
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parents:
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|
552 |
3428c60d7cfc
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Franklin Schmidt <fschmidt@gmail.com>
parents:
diff
changeset
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553 |
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Franklin Schmidt <fschmidt@gmail.com>
parents:
diff
changeset
|
554 |
3428c60d7cfc
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parents:
diff
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|
555 |
3428c60d7cfc
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|
556 |