Mercurial > dive4elements > framework
annotate artifacts-common/src/main/java/de/intevation/artifacts/common/utils/FileTools.java @ 428:d01e9f6a3dc1
dummy merge for repo head
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Fri, 28 Sep 2012 12:15:12 +0200 |
parents | c40729bfe06d |
children | e39e23320a23 |
rev | line source |
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Inserted a new utility class FileTools to work with files.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1 /* |
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2 * Copyright (c) 2010, 2011 by Intevation GmbH |
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3 * |
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4 * This program is free software under the LGPL (>=v2.1) |
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5 * Read the file LGPL.txt coming with the software for details |
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6 * or visit http://www.gnu.org/licenses/ if it does not exist. |
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7 */ |
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8 package de.intevation.artifacts.common.utils; |
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9 |
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10 import java.io.BufferedInputStream; |
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11 import java.io.File; |
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12 import java.io.IOException; |
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13 import java.io.InputStream; |
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14 import java.io.FileInputStream; |
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15 import java.io.FileOutputStream; |
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16 import java.io.OutputStream; |
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17 import java.io.BufferedOutputStream; |
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18 import java.nio.channels.FileChannel; |
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19 |
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20 import java.util.Deque; |
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21 import java.util.ArrayDeque; |
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22 import java.util.List; |
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23 import java.util.Set; |
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24 import java.util.HashSet; |
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25 import java.util.ArrayList; |
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26 import java.util.Enumeration; |
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27 import java.util.zip.ZipFile; |
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28 import java.util.zip.ZipEntry; |
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29 import java.util.zip.ZipOutputStream; |
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30 |
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31 import org.apache.log4j.Logger; |
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32 |
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33 import java.security.MessageDigest; |
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34 import java.security.NoSuchAlgorithmException; |
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35 |
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36 public class FileTools |
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37 { |
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38 private static Logger log = Logger.getLogger(FileTools.class); |
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39 |
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40 public static final String DIGEST = |
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41 System.getProperty("artifacts.common.file.cmp.digest", "MD5"); |
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42 |
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43 private FileTools() { |
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44 } |
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45 |
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46 |
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47 public static File getDirectory(String path, String name) { |
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48 if (path == null || name == null) { |
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49 return null; |
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50 } |
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51 |
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52 File dir = new File(path, name); |
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53 |
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54 if (!dir.exists()) { |
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55 log.debug( |
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56 "Directory '" + dir.getAbsolutePath() + "' doesn't " + |
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57 "exist. Try to create it."); |
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58 |
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59 return dir.mkdir() ? dir : null; |
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60 } |
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61 else { |
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62 return dir.isDirectory() ? dir : null; |
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63 } |
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64 } |
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65 |
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66 public static File repair(File file) { |
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67 file = file.getAbsoluteFile(); |
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68 if (file.exists()) { |
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69 return file; |
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70 } |
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71 Deque<String> parts = new ArrayDeque<String>(); |
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72 File curr = file; |
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73 while (curr != null) { |
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74 String name = curr.getName(); |
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75 if (name.length() > 0) { |
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76 parts.push(curr.getName()); |
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77 } |
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78 curr = curr.getParentFile(); |
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79 } |
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80 |
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81 curr = null; |
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82 OUTER: while (!parts.isEmpty()) { |
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83 String f = parts.pop(); |
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84 log.debug("fixing: '" + f + "'"); |
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85 if (curr == null) { |
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86 // XXX: Not totaly correct because there |
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87 // more than one root on none unix systems. |
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88 for (File root: File.listRoots()) { |
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89 File [] files = root.listFiles(); |
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90 if (files == null) { |
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91 log.warn("cannot list '" + root); |
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92 continue; |
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93 } |
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94 for (File candidate: files) { |
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95 if (candidate.getName().equalsIgnoreCase(f)) { |
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96 curr = new File(root, candidate.getName()); |
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97 continue OUTER; |
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98 } |
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99 } |
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100 } |
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101 break; |
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102 } |
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103 else { |
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104 File [] files = curr.listFiles(); |
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105 if (files == null) { |
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106 log.warn("cannot list: '" + curr + "'"); |
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107 return file; |
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108 } |
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109 for (File candidate: files) { |
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110 if (candidate.getName().equalsIgnoreCase(f)) { |
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111 curr = new File(curr, candidate.getName()); |
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112 continue OUTER; |
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113 } |
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114 } |
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115 curr = null; |
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116 break; |
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117 } |
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118 } |
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119 |
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120 if (curr == null) { |
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121 log.warn("cannot repair path '" + file + "'"); |
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122 return file; |
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123 } |
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124 |
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125 return curr; |
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126 } |
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127 |
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128 public static class HashedFile |
329
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129 implements Comparable<HashedFile> |
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130 { |
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131 protected File file; |
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132 protected long length; |
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133 protected byte [] hash; |
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134 |
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135 public HashedFile(File file) { |
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136 this.file = file; |
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137 length = file.length(); |
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138 } |
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139 |
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140 public File getFile() { |
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141 return file; |
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142 } |
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143 |
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144 protected byte [] getHash() { |
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145 if (hash == null) { |
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146 InputStream in = null; |
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147 |
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148 try { |
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149 in = new FileInputStream(file); |
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150 |
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151 MessageDigest digest = MessageDigest.getInstance(DIGEST); |
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152 |
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153 byte [] buf = new byte[40*1024]; |
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154 int r; |
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155 |
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156 while ((r = in.read(buf)) >= 0) { |
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157 digest.update(buf, 0, r); |
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158 } |
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159 |
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160 hash = digest.digest(); |
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161 } |
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162 catch (IOException ioe) { |
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163 log.error(ioe); |
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164 hash = new byte[0]; |
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165 } |
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166 catch (NoSuchAlgorithmException nsae) { |
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167 log.error(nsae); |
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168 hash = new byte[0]; |
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169 } |
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170 finally { |
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171 if (in != null) { |
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172 try { |
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173 in.close(); |
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174 } |
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175 catch (IOException ioe) { |
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176 log.error(ioe); |
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177 } |
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178 } |
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179 } |
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180 } |
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181 return hash; |
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182 } |
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183 |
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184 @Override |
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185 public int compareTo(HashedFile other) { |
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186 if (length < other.length) return -1; |
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187 if (length > other.length) return +1; |
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188 return compare(getHash(), other.getHash()); |
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189 } |
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190 |
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191 private static int compare(byte [] a, byte [] b) { |
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192 if (a.length < b.length) return -1; |
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193 if (a.length > b.length) return +1; |
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194 for (int i = 0; i < a.length; ++i) { |
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195 int x = a[i] & 0xff; |
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196 int y = b[i] & 0xff; |
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197 if (x < y) return -1; |
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198 if (x > y) return +1; |
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199 } |
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200 return 0; |
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201 } |
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202 |
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203 @Override |
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204 public boolean equals(Object other) { |
394
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205 return other instanceof HashedFile |
329
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206 && ((HashedFile)other).compareTo(this) == 0; |
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207 } |
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208 |
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209 @Override |
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210 public int hashCode() { |
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211 return (int)(length ^ (length >>> 32)); |
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212 } |
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213 } // class HashedFile |
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214 |
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215 public static List<File> uniqueFiles(List<File> files) { |
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216 |
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217 Set<HashedFile> set = new HashSet<HashedFile>(); |
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218 |
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219 for (File file: files) { |
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220 if (!set.add(new HashedFile(file))) { |
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221 log.warn("file '" + file + "' is a duplicate."); |
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222 } |
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223 } |
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224 |
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225 ArrayList<File> out = new ArrayList<File>(set.size()); |
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226 for (HashedFile hf: set) { |
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227 out.add(hf.file); |
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228 } |
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229 |
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230 return out; |
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231 } |
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232 |
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233 public interface FileVisitor { |
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234 boolean visit(File file); |
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235 } // Visitor |
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236 |
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237 public static void walkTree(File root, FileVisitor visitor) { |
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238 |
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239 Deque<File> stack = new ArrayDeque<File>(); |
329
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240 |
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241 stack.push(root); |
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242 |
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243 while (!stack.isEmpty()) { |
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244 File current = stack.pop(); |
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245 if (!visitor.visit(current)) break; |
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246 if (current.isDirectory()) { |
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247 File [] subs = current.listFiles(); |
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248 if (subs != null) { |
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249 for (File f: subs) { |
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250 stack.push(f); |
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251 } |
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252 } |
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253 } |
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254 } |
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255 } |
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256 |
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257 /** |
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258 * Deletes everything in a directory. |
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259 * |
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260 * @param dir The directory. |
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261 */ |
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262 public final static void deleteContent(File dir) { |
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263 if (dir == null || !dir.isDirectory()) { |
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264 return; |
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265 } |
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266 |
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267 File[] files = dir.listFiles(); |
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268 if (files != null) { |
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269 for (File file: files) { |
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270 deleteRecursive(file); |
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271 } |
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272 } |
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273 |
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274 return; |
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275 } |
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276 |
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277 /** |
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278 * Delete <i>file</i> and everything in <i>file</i> if it is a directory. |
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279 * |
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280 * @param file The file or directory. |
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281 * @return true, if deletion was successful - otherwise false. |
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282 */ |
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283 public final static boolean deleteRecursive(File file) { |
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284 |
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285 if (file == null) { |
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286 return false; |
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287 } |
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288 |
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289 if (file.isDirectory()) { |
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290 File [] files = file.listFiles(); |
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291 if (files != null) { |
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292 for (File sub: files) { |
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293 if (!deleteRecursive(sub)) { |
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294 return false; |
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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 return file.delete(); |
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301 } |
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302 |
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303 /** |
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304 * Put the given file or directory into a zip archive. |
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305 * |
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306 * @param file The file or directory. |
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307 * @param outputStream The stream to write the archive to. |
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308 * @throws IOException if an error occured while zip creation or writing to |
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309 * output stream. |
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310 */ |
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311 public static void createZipArchive( |
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312 File file, |
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313 OutputStream outputStream |
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314 ) |
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315 throws IOException |
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316 { |
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317 ZipOutputStream out = new ZipOutputStream(outputStream); |
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318 |
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319 if (file.isFile()) { |
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320 copyFileToZip("", file, out); |
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321 } |
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322 else if (file.isDirectory()) { |
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323 |
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324 Deque<PrefixDir> stack = new ArrayDeque<PrefixDir>(); |
329
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325 stack.push(new PrefixDir(file.getName() + "/", file)); |
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326 |
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327 while (!stack.isEmpty()) { |
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328 PrefixDir pd = stack.pop(); |
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329 |
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330 ZipEntry dirEntry = new ZipEntry(pd.prefix); |
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331 out.putNextEntry(dirEntry); |
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332 out.closeEntry(); |
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333 |
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334 File [] files = pd.dir.listFiles(); |
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335 if (files != null) { |
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336 for (File sub: files) { |
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337 if (sub.isDirectory()) { |
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338 stack.push(new PrefixDir( |
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339 pd.prefix + sub.getName() + "/", |
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340 sub)); |
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341 } |
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342 else if (sub.isFile()) { |
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343 copyFileToZip(pd.prefix, sub, out); |
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344 } |
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345 } |
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346 } |
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347 } |
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348 } |
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349 |
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350 out.finish(); |
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351 } |
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352 |
383
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353 |
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354 public static void extractArchive(File archive, File destDir) |
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355 throws IOException { |
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356 if (!destDir.exists()) { |
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357 destDir.mkdir(); |
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358 } |
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359 |
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360 ZipFile zipFile = new ZipFile(archive); |
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361 Enumeration entries = zipFile.entries(); |
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362 |
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363 byte[] buffer = new byte[16384]; |
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364 int len; |
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365 while (entries.hasMoreElements()) { |
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366 ZipEntry entry = (ZipEntry) entries.nextElement(); |
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367 |
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368 String entryFileName = entry.getName(); |
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369 |
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370 File dir = dir = buildDirectoryHierarchyFor(entryFileName, destDir); |
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371 if (!dir.exists()) { |
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372 dir.mkdirs(); |
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373 } |
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374 |
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375 if (!entry.isDirectory()) { |
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376 BufferedOutputStream bos = new BufferedOutputStream( |
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377 new FileOutputStream(new File(destDir, entryFileName))); |
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378 |
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379 BufferedInputStream bis = new BufferedInputStream(zipFile |
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380 .getInputStream(entry)); |
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381 |
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382 while ((len = bis.read(buffer)) > 0) { |
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383 bos.write(buffer, 0, len); |
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384 } |
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385 |
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386 bos.flush(); |
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387 bos.close(); |
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388 bis.close(); |
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389 } |
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390 } |
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391 zipFile.close(); |
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392 } |
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393 |
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394 private static File buildDirectoryHierarchyFor( |
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395 String entryName, |
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396 File destDir) |
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397 { |
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398 int lastIndex = entryName.lastIndexOf('/'); |
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399 String entryFileName = entryName.substring(lastIndex + 1); |
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400 String internalPathToEntry = entryName.substring(0, lastIndex + 1); |
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401 return new File(destDir, internalPathToEntry); |
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402 } |
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403 |
329
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404 /** |
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405 * A class representing a directory with a prefix. |
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406 */ |
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407 private static final class PrefixDir { |
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408 |
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409 String prefix; |
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410 File dir; |
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411 |
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412 public PrefixDir(String prefix, File dir) { |
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413 this.prefix = prefix; |
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414 this.dir = dir; |
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415 } |
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416 |
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417 } // class PrefixDir |
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418 |
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419 /** |
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420 * Write a file to zip archive. |
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421 * |
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422 * @param prefix A prefix. |
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423 * @param file The file. |
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424 * @param out The output stream. |
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425 * @throws IOException if an error occured while writing to zip output |
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426 * stream. |
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427 */ |
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428 private static void copyFileToZip( |
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429 String prefix, |
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430 File file, |
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431 ZipOutputStream out |
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432 ) |
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433 throws IOException |
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434 { |
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435 String entryName = prefix + file.getName(); |
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436 ZipEntry entry = new ZipEntry(entryName); |
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437 out.putNextEntry(entry); |
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438 InputStream in = null; |
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439 try { |
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440 in = |
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441 new BufferedInputStream( |
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442 new FileInputStream(file), 20*1024); |
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443 |
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444 byte [] buf = new byte[2048]; |
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445 |
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446 int r; |
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447 while ((r = in.read(buf)) > 0) { |
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448 out.write(buf, 0, r); |
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449 } |
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450 } |
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451 finally { |
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452 if (in != null) { |
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453 try { in.close(); } |
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454 catch (IOException ioe) {} |
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455 } |
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456 } |
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457 out.closeEntry(); |
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458 } |
364
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459 |
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460 |
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461 /** |
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462 * Copies a <i>src</i> file to <i>target</i>. |
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463 * |
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464 * @param src A file (not a directory) that should be copied. |
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465 * @param target The destination. This might be a file or a directory. |
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466 * |
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467 * @return true, if <i>src</i> has been successfully copied; otherwise |
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468 * false. |
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469 */ |
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470 public static boolean copyFile(File src, File target) |
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471 throws IOException |
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472 { |
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473 if (src == null || !src.exists()) { |
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474 log.warn("Source file does not exist!"); |
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475 return false; |
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476 } |
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477 |
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478 if (!src.canRead()) { |
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479 log.warn("Cannot read Source file!"); |
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480 return false; |
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481 } |
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482 |
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483 if (src.isDirectory()) { |
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484 log.warn("Source is a directory!"); |
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485 return false; |
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486 } |
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487 |
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488 if (target.isDirectory()) { |
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489 target = new File(target, src.getName()); |
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490 } |
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491 |
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492 FileInputStream in = null; |
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493 FileOutputStream out = null; |
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494 |
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495 try { |
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496 in = new FileInputStream(src); |
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497 out = new FileOutputStream(target); |
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498 |
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499 FileChannel inChannel = in.getChannel(); |
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500 FileChannel outChannel = out.getChannel(); |
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501 |
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502 inChannel.transferTo(0l, inChannel.size(), outChannel); |
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503 |
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504 return true; |
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505 } |
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506 catch (IOException ioe) { |
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507 log.warn(ioe, ioe); |
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508 } |
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509 finally { |
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510 if (in != null) { |
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511 try { |
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512 in.close(); |
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|
513 } |
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|
514 catch (IOException ioe) { /* do nothing here */ } |
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|
515 } |
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|
516 |
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|
517 if (out != null) { |
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518 try { |
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|
519 out.close(); |
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|
520 } |
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|
521 catch (IOException ioe) { /* do nothing here */ } |
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|
522 } |
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|
523 } |
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|
524 |
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|
525 return false; |
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Added new FileTools functions to copy files and directories.
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diff
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|
526 } |
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|
527 |
0723859f776f
Added new FileTools functions to copy files and directories.
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diff
changeset
|
528 |
0723859f776f
Added new FileTools functions to copy files and directories.
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changeset
|
529 /** |
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Added new FileTools functions to copy files and directories.
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|
530 * Copies a directory <i>source</i> to a destination path <i>dest</i>. |
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diff
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|
531 * |
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Added new FileTools functions to copy files and directories.
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|
532 * @param source A directory that should be copied. |
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|
533 * @param dest A destination directory which is created if it is not |
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|
534 * existing yet. |
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Added new FileTools functions to copy files and directories.
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diff
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|
535 * |
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Added new FileTools functions to copy files and directories.
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|
536 * @return true, if the directory has been successfully copied; otherwise |
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|
537 * false. |
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Added new FileTools functions to copy files and directories.
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|
538 */ |
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Added new FileTools functions to copy files and directories.
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diff
changeset
|
539 public static boolean copyDirectory(final File source, final File dest) { |
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|
540 if (source == null || !source.exists()) { |
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Added new FileTools functions to copy files and directories.
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|
541 log.warn("Source directory does not exist!"); |
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diff
changeset
|
542 return false; |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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|
543 } |
0723859f776f
Added new FileTools functions to copy files and directories.
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diff
changeset
|
544 |
0723859f776f
Added new FileTools functions to copy files and directories.
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diff
changeset
|
545 if (!source.isDirectory()) { |
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Added new FileTools functions to copy files and directories.
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diff
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|
546 log.warn("Source is not a directory!"); |
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Added new FileTools functions to copy files and directories.
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|
547 return false; |
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Added new FileTools functions to copy files and directories.
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diff
changeset
|
548 } |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
329
diff
changeset
|
549 |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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329
diff
changeset
|
550 if (dest == null) { |
0723859f776f
Added new FileTools functions to copy files and directories.
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diff
changeset
|
551 log.warn("Destination directory is null!"); |
0723859f776f
Added new FileTools functions to copy files and directories.
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329
diff
changeset
|
552 return false; |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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329
diff
changeset
|
553 } |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
554 |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
555 if (!dest.exists()) { |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
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diff
changeset
|
556 if (!dest.mkdir()) { |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
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diff
changeset
|
557 log.warn("Cannot create destination directory!"); |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
329
diff
changeset
|
558 return false; |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
559 } |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
560 } |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
561 |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
562 File[] children = source.listFiles(); |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
329
diff
changeset
|
563 int failed = 0; |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
329
diff
changeset
|
564 |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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329
diff
changeset
|
565 if (children != null && children.length > 0) { |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
566 for (File child: children) { |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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329
diff
changeset
|
567 if (child.isFile()) { |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
329
diff
changeset
|
568 try { |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
329
diff
changeset
|
569 if (!copyFile(child, dest)) { |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
570 failed++; |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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diff
changeset
|
571 } |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
572 } |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
573 catch (IOException ioe) { |
0723859f776f
Added new FileTools functions to copy files and directories.
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329
diff
changeset
|
574 log.warn(ioe, ioe); |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
329
diff
changeset
|
575 failed++; |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
576 } |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
577 } |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
578 else if (child.isDirectory()) { |
0723859f776f
Added new FileTools functions to copy files and directories.
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329
diff
changeset
|
579 copyDirectory(child, new File(dest, child.getName())); |
0723859f776f
Added new FileTools functions to copy files and directories.
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329
diff
changeset
|
580 } |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
581 } |
0723859f776f
Added new FileTools functions to copy files and directories.
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329
diff
changeset
|
582 } |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
329
diff
changeset
|
583 |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
584 log.debug("Failed to copy " + failed + " files."); |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
585 |
0723859f776f
Added new FileTools functions to copy files and directories.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
329
diff
changeset
|
586 return true; |
0723859f776f
Added new FileTools functions to copy files and directories.
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parents:
329
diff
changeset
|
587 } |
329
666417d5781c
Inserted a new utility class FileTools to work with files.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff
changeset
|
588 } |
666417d5781c
Inserted a new utility class FileTools to work with files.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff
changeset
|
589 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |