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annotate src/org/eclipse/jetty/util/IO.java @ 889:5731a7707466
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 06 Oct 2016 23:24:30 -0600 |
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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 |
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37 /* ======================================================================== */ |
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38 /** IO Utilities. |
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39 * Provides stream handling utilities in |
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40 * singleton Threadpool implementation accessed by static members. |
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41 */ |
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42 public class IO |
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43 { |
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44 private static final Logger LOG = LoggerFactory.getLogger(IO.class); |
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45 |
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46 /* ------------------------------------------------------------------- */ |
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47 private static int bufferSize = 64*1024; |
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48 |
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49 /* ------------------------------------------------------------------- */ |
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50 /** Copy Stream in to Stream out until EOF or exception. |
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51 */ |
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52 public static void copy(InputStream in, OutputStream out) |
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53 throws IOException |
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54 { |
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55 copy(in,out,-1); |
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56 } |
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57 |
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58 /* ------------------------------------------------------------------- */ |
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59 /** Copy Reader to Writer out until EOF or exception. |
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60 */ |
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61 public static void copy(Reader in, Writer out) |
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62 throws IOException |
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63 { |
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64 copy(in,out,-1); |
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65 } |
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66 |
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67 /* ------------------------------------------------------------------- */ |
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68 /** Copy Stream in to Stream for byteCount bytes or until EOF or exception. |
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69 */ |
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70 public static void copy(InputStream in, |
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71 OutputStream out, |
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72 long byteCount) |
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73 throws IOException |
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74 { |
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75 byte buffer[] = new byte[bufferSize]; |
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76 int len=bufferSize; |
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77 |
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78 if (byteCount>=0) |
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79 { |
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80 while (byteCount>0) |
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81 { |
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82 int max = byteCount<bufferSize?(int)byteCount:bufferSize; |
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83 len=in.read(buffer,0,max); |
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84 |
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85 if (len==-1) |
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86 break; |
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87 |
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88 byteCount -= len; |
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89 out.write(buffer,0,len); |
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90 } |
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91 } |
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92 else |
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93 { |
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94 while (true) |
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95 { |
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96 len=in.read(buffer,0,bufferSize); |
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97 if (len<0 ) |
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98 break; |
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99 out.write(buffer,0,len); |
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100 } |
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101 } |
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102 } |
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103 |
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104 /* ------------------------------------------------------------------- */ |
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105 /** Copy Reader to Writer for byteCount bytes or until EOF or exception. |
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106 */ |
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107 public static void copy(Reader in, |
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108 Writer out, |
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109 long byteCount) |
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110 throws IOException |
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111 { |
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112 char buffer[] = new char[bufferSize]; |
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113 int len=bufferSize; |
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114 |
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115 if (byteCount>=0) |
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116 { |
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117 while (byteCount>0) |
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118 { |
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119 if (byteCount<bufferSize) |
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120 len=in.read(buffer,0,(int)byteCount); |
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121 else |
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122 len=in.read(buffer,0,bufferSize); |
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123 |
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124 if (len==-1) |
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125 break; |
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126 |
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127 byteCount -= len; |
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128 out.write(buffer,0,len); |
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129 } |
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130 } |
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131 else if (out instanceof PrintWriter) |
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132 { |
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133 PrintWriter pout=(PrintWriter)out; |
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134 while (!pout.checkError()) |
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135 { |
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136 len=in.read(buffer,0,bufferSize); |
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137 if (len==-1) |
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138 break; |
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139 out.write(buffer,0,len); |
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140 } |
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141 } |
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142 else |
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143 { |
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144 while (true) |
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145 { |
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146 len=in.read(buffer,0,bufferSize); |
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147 if (len==-1) |
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148 break; |
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149 out.write(buffer,0,len); |
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150 } |
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151 } |
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152 } |
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153 |
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154 /* ------------------------------------------------------------ */ |
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155 /** Copy files or directories |
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156 * @param from |
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157 * @param to |
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158 * @throws IOException |
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159 */ |
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160 public static void copy(File from,File to) throws IOException |
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161 { |
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162 if (from.isDirectory()) |
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163 copyDir(from,to); |
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164 else |
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165 copyFile(from,to); |
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166 } |
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167 |
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168 /* ------------------------------------------------------------ */ |
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169 public static void copyDir(File from,File to) throws IOException |
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170 { |
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171 if (to.exists()) |
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172 { |
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173 if (!to.isDirectory()) |
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174 throw new IllegalArgumentException(to.toString()); |
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175 } |
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176 else |
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177 to.mkdirs(); |
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178 |
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179 File[] files = from.listFiles(); |
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180 if (files!=null) |
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181 { |
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182 for (int i=0;i<files.length;i++) |
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183 { |
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184 String name = files[i].getName(); |
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185 if (".".equals(name) || "..".equals(name)) |
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186 continue; |
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187 copy(files[i],new File(to,name)); |
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188 } |
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189 } |
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190 } |
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191 |
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192 /* ------------------------------------------------------------ */ |
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193 public static void copyFile(File from,File to) throws IOException |
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194 { |
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195 FileInputStream in=new FileInputStream(from); |
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196 FileOutputStream out=new FileOutputStream(to); |
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197 copy(in,out); |
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198 in.close(); |
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199 out.close(); |
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200 } |
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201 |
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202 |
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203 /* ------------------------------------------------------------ */ |
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204 /** |
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205 * closes any {@link Closeable} |
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206 * |
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207 * @param c the closeable to close |
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208 */ |
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209 public static void close(Closeable c) |
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210 { |
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211 try |
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212 { |
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213 if (c != null) |
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214 c.close(); |
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215 } |
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216 catch (IOException e) |
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217 { |
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218 LOG.trace("",e); |
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219 } |
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220 } |
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221 |
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222 /** |
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223 * closes an input stream, and logs exceptions |
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224 * |
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225 * @param is the input stream to close |
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226 */ |
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227 public static void close(InputStream is) |
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228 { |
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229 try |
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230 { |
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231 if (is != null) |
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232 is.close(); |
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233 } |
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234 catch (IOException e) |
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235 { |
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236 LOG.trace("",e); |
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237 } |
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238 } |
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239 |
862
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240 /** |
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241 * closes a reader, and logs exceptions |
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242 * |
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243 * @param reader the reader to close |
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244 */ |
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245 public static void close(Reader reader) |
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246 { |
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247 try |
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248 { |
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249 if (reader != null) |
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250 reader.close(); |
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251 } catch (IOException e) |
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252 { |
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253 LOG.trace("",e); |
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254 } |
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255 } |
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256 |
862
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257 /** |
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258 * closes a writer, and logs exceptions |
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259 * |
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260 * @param writer the writer to close |
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261 */ |
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262 public static void close(Writer writer) |
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263 { |
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264 try |
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265 { |
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266 if (writer != null) |
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267 writer.close(); |
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268 } catch (IOException e) |
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269 { |
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270 LOG.trace("",e); |
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271 } |
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272 } |
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273 |
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274 /* ------------------------------------------------------------ */ |
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275 /** |
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276 * closes an output stream, and logs exceptions |
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277 * |
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278 * @param os the output stream to close |
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279 */ |
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280 public static void close(OutputStream os) |
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281 { |
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282 try |
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283 { |
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284 if (os != null) |
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285 os.close(); |
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286 } |
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287 catch (IOException e) |
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288 { |
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289 LOG.trace("",e); |
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290 } |
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291 } |
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292 |
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293 /* ------------------------------------------------------------ */ |
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294 /** |
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295 * @return An outputstream to nowhere |
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296 */ |
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297 public static InputStream getClosedStream() |
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298 { |
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299 return __closedStream; |
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300 } |
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301 |
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302 /* ------------------------------------------------------------ */ |
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303 /* ------------------------------------------------------------ */ |
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304 private static class ClosedIS extends InputStream |
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305 { |
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306 @Override |
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307 public int read() throws IOException |
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308 { |
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309 return -1; |
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310 } |
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311 } |
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312 private static ClosedIS __closedStream = new ClosedIS(); |
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313 } |