Mercurial > hg > Members > kono > jpf-core
annotate src/main/gov/nasa/jpf/util/PathnameExpander.java @ 34:49be04cc6389 default tip java9-try
cyclic dependency ...
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Tue, 19 Dec 2017 11:21:23 +0900 |
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1 /* |
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2 * Copyright (C) 2014, United States Government, as represented by the |
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3 * Administrator of the National Aeronautics and Space Administration. |
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4 * All rights reserved. |
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5 * |
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the |
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except |
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8 * in compliance with the License. You may obtain a copy of the License at |
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9 * |
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10 * http://www.apache.org/licenses/LICENSE-2.0. |
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11 * |
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12 * Unless required by applicable law or agreed to in writing, software |
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13 * distributed under the License is distributed on an "AS IS" BASIS, |
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 * See the License for the specific language governing permissions and |
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16 * limitations under the License. |
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17 */ |
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18 package gov.nasa.jpf.util; |
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19 |
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20 import java.io.File; |
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21 import java.util.ArrayList; |
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22 import java.util.regex.Matcher; |
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23 import java.util.regex.Pattern; |
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24 |
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25 /** |
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26 * utility to perform pathname expansion |
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27 * the following patterns are supported so far: |
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28 * |
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29 * (1) brace expansion ala bash: foo{Boo,Shoo} => fooBoo, fooShoo |
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30 * (this doesn't check for existence, its simply lexical) |
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31 * |
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32 * (2) '*' wildcard pathname expansion ala bash: "*.java" | "*\Main*.java" |
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33 * (supports wildcards in mutiple path elements and within file/dir name) |
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34 * |
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35 * (3) recursive dir expansion ala Ant: "**\*.jar" |
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36 * |
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37 */ |
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38 public class PathnameExpander { |
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39 |
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40 public String[] expandPath (String s) { |
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41 if (s == null || s.length() == 0) { |
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42 return null; |
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43 } |
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44 |
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45 boolean hasWildcards = (s.indexOf('*') >= 0); |
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46 |
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47 int i = s.indexOf('{'); |
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48 if (i >= 0){ |
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49 ArrayList<String> list = new ArrayList<String>(); |
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50 |
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51 int j=0, jLast = s.length(); |
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52 for (; (i = s.indexOf('{', j)) >= 0;) { |
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53 if ((j = s.indexOf('}', i)) > 0) { |
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54 String[] choices = s.substring(i + 1, j).split(","); |
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55 |
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56 if (list.isEmpty()) { |
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57 String prefix = s.substring(0, i); |
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58 for (String c : choices) { |
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59 list.add(prefix + c); |
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60 } |
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61 } else { |
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62 String prefix = s.substring(jLast, i); |
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63 ArrayList<String> newList = new ArrayList<String>(); |
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64 for (String e : list) { |
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65 for (String c : choices) { |
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66 newList.add(e + prefix + c); |
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67 } |
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68 } |
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69 list = newList; |
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70 } |
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71 jLast = j+1; |
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72 } else { |
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73 throw new IllegalArgumentException("illegal path spec (missing '}'): " + s); |
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74 } |
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75 } |
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76 |
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77 if (jLast < s.length()) { |
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78 String postfix = s.substring(jLast); |
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79 ArrayList<String> newList = new ArrayList<String>(); |
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80 for (String e : list) { |
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81 newList.add(e + postfix); |
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82 } |
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83 list = newList; |
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84 } |
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85 |
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86 if (hasWildcards){ |
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87 ArrayList<String> newList = new ArrayList<String>(); |
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88 for (String p : list) { |
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89 for (String c : expandWildcards(p)) { |
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90 newList.add(c); |
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91 } |
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92 } |
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93 list = newList; |
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94 } |
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95 |
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96 return list.toArray(new String[list.size()]); |
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97 |
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98 } else { // no bracket expansion required |
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99 |
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100 if (hasWildcards){ |
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101 return expandWildcards(s); |
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102 |
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103 } else { // nothing to expand at all |
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104 return (new String[] {s}); |
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105 } |
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106 } |
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107 } |
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108 |
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109 protected String[] expandWildcards (String s){ |
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110 int i = s.indexOf('*'); |
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111 |
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112 if (i >= 0){ // Ok, we have at least one wildcard |
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113 String[] a = s.split("\\/"); |
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114 ArrayList<File> list = new ArrayList<File>(); |
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115 |
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116 int j= initializeMatchList(list, a[0]); |
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117 for (; j<a.length; j++){ |
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118 ArrayList<File> newList = new ArrayList<File>(); |
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119 |
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120 String e = a[j]; |
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121 if (e.indexOf('*') >= 0){ |
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122 |
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123 if (e.equals("**")){ // matches all subdirs recursively |
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124 collectDirs(list, newList); |
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125 |
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126 } else { // file/dir name match |
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127 collectMatchingNames(list, newList, getPattern(e)); |
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128 } |
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129 |
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130 } else { // no wildcard |
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131 collectExistingFile(list, newList, e); |
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132 } |
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133 |
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134 if (newList.isEmpty()){ // shortcut, nothing more to match |
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135 return new String[0]; |
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136 } |
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137 list = newList; |
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138 } |
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139 |
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140 return getPaths(list); |
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141 |
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142 } else { // no wildcards, nothing to expand |
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143 return new String[] {s}; |
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144 } |
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145 } |
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146 |
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147 private int initializeMatchList (ArrayList<File> list, String path){ |
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148 if (path.isEmpty()){ // absolute pathname (ignoring drive letters for now) |
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149 list.add(new File(File.separator)); |
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150 return 1; |
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151 } else if (path.equals("..") || path.equals(".")){ |
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152 list.add(new File(path)); |
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153 return 1; |
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154 } else { |
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155 list.add(new File(".")); |
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156 return 0; |
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157 } |
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158 } |
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159 |
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160 private void collectMatchingNames(ArrayList<File> list, ArrayList<File> newList, Pattern pattern){ |
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161 for (File dir : list) { |
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162 if (dir.isDirectory()){ |
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163 for (String c : dir.list()){ |
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164 Matcher m = pattern.matcher(c); |
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165 if (m.matches()){ |
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166 newList.add(new File(dir,c)); |
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167 } |
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168 } |
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169 } |
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170 } |
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171 } |
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172 |
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173 private void collectExistingFile(ArrayList<File> list, ArrayList<File> newList, String fname) { |
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174 for (File dir : list) { |
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175 if (dir.isDirectory()){ |
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176 File nf = new File(dir, fname); |
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177 if (nf.exists()) { |
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178 newList.add(nf); |
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179 } |
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180 } |
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181 } |
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182 } |
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183 |
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184 private void collectDirs(ArrayList<File> list, ArrayList<File> newList){ |
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185 for (File dir : list) { |
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186 if (dir.isDirectory()){ |
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187 newList.add(dir); // this includes the dir itself! |
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188 collectSubdirs(newList,dir); |
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189 } |
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190 } |
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191 } |
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192 private void collectSubdirs(ArrayList<File> newList, File dir) { |
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193 for (File f : dir.listFiles()){ |
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194 if (f.isDirectory()){ |
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195 newList.add(f); |
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196 collectSubdirs(newList, f); |
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197 } |
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198 } |
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199 } |
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200 |
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201 protected String[] getPaths(ArrayList<File> list) { |
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202 String[] result = new String[list.size()]; |
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203 int k=0; |
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204 for (File f : list){ |
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205 String p = f.getPath(); |
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206 if ((p.length() > 1) && (p.charAt(0) == '.')){ // remove leading "./" |
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207 char c = p.charAt(1); |
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208 if (c == '\\' || c == '/'){ |
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209 p = p.substring(2); |
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210 } |
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211 } |
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212 result[k++] = p; |
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213 } |
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214 return result; |
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215 } |
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216 |
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217 protected Pattern getPattern(String s){ |
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218 Pattern p; |
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219 |
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220 StringBuilder sb = new StringBuilder(); |
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221 |
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222 int len = s.length(); |
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223 for (int j=0; j<len; j++){ |
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224 char c = s.charAt(j); |
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225 switch (c){ |
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226 case '.' : sb.append("\\."); break; |
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227 case '$' : sb.append("\\$"); break; |
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228 case '[' : sb.append("\\["); break; |
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229 case ']' : sb.append("\\]"); break; |
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230 case '*' : sb.append(".*"); break; |
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231 // <2do> and probably more.. |
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232 default: sb.append(c); |
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233 } |
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234 } |
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235 |
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236 p = Pattern.compile(sb.toString()); |
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237 return p; |
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238 } |
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239 } |