| 1 | package tuffy.util; |
| 2 | import java.io.*; |
| 3 | import java.util.*; |
| 4 | import java.util.zip.GZIPInputStream; |
| 5 | import java.util.zip.GZIPOutputStream; |
| 6 | |
| 7 | /** |
| 8 | * Container of file related utilities. |
| 9 | */ |
| 10 | public class FileMan { |
| 11 | private static long fguid = 0; |
| 12 | |
| 13 | public synchronized static String getUniqueFileName(){ |
| 14 | long tid = Thread.currentThread().getId(); |
| 15 | return String.format("tmp.%5d.%5d", tid, fguid++); |
| 16 | } |
| 17 | |
| 18 | public synchronized static String getUniqueFileNameAbsolute(){ |
| 19 | long tid = Thread.currentThread().getId(); |
| 20 | return Config.getLoadingDir() + File.pathSeparator + String.format("tmp.%5d.%5d", tid, fguid++); |
| 21 | } |
| 22 | |
| 23 | public static long getFileSize(String filename) { |
| 24 | |
| 25 | File file = new File(filename); |
| 26 | |
| 27 | if (!file.exists() || !file.isFile()) { |
| 28 | UIMan.println("File doesn't exist"); |
| 29 | return -1; |
| 30 | } |
| 31 | |
| 32 | return file.length(); |
| 33 | } |
| 34 | |
| 35 | public static BufferedReader getBufferedReaderMaybeGZ(String f){ |
| 36 | try{ |
| 37 | InputStream is; |
| 38 | FileInputStream fis = new FileInputStream(f); |
| 39 | if(f.toLowerCase().endsWith(".gz")){ |
| 40 | is = new GZIPInputStream(fis); |
| 41 | }else{ |
| 42 | is = fis; |
| 43 | } |
| 44 | InputStreamReader reader = new InputStreamReader(is, "UTF8"); |
| 45 | BufferedReader lreader = new BufferedReader(reader); |
| 46 | return lreader; |
| 47 | }catch(Exception e){ |
| 48 | ExceptionMan.handle(e); |
| 49 | } |
| 50 | return null; |
| 51 | } |
| 52 | |
| 53 | |
| 54 | public static BufferedWriter getBufferedWriterMaybeGZ(String f){ |
| 55 | try{ |
| 56 | OutputStream os; |
| 57 | FileOutputStream fis = new FileOutputStream(f); |
| 58 | if(f.toLowerCase().endsWith(".gz")){ |
| 59 | os = new GZIPOutputStream(fis); |
| 60 | }else{ |
| 61 | os = fis; |
| 62 | } |
| 63 | OutputStreamWriter reader = new OutputStreamWriter(os, "UTF8"); |
| 64 | BufferedWriter writer = new BufferedWriter(reader); |
| 65 | return writer; |
| 66 | }catch(Exception e){ |
| 67 | ExceptionMan.handle(e); |
| 68 | } |
| 69 | return null; |
| 70 | } |
| 71 | |
| 72 | |
| 73 | public static String getParentDir(String fname){ |
| 74 | File f = new File(fname); |
| 75 | String p = f.getParent(); |
| 76 | if(p == null) return "."; |
| 77 | return p; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Writes a string to a file, using UTF-8 encoding. |
| 82 | */ |
| 83 | public static void writeToFile(String filename, String content) { |
| 84 | |
| 85 | BufferedWriter bufferedWriter = null; |
| 86 | try { |
| 87 | bufferedWriter = new BufferedWriter(new OutputStreamWriter |
| 88 | (new FileOutputStream(filename),"UTF8")); |
| 89 | bufferedWriter.write(content); |
| 90 | bufferedWriter.flush(); |
| 91 | bufferedWriter.close(); |
| 92 | } catch (Exception e) { |
| 93 | ExceptionMan.handle(e); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Reads lines from a text file. |
| 99 | */ |
| 100 | public static ArrayList<String> getLines(String filename){ |
| 101 | try { |
| 102 | FileReader reader = new FileReader(filename); |
| 103 | BufferedReader lreader = new BufferedReader(reader); |
| 104 | String line = lreader.readLine(); |
| 105 | ArrayList<String> lines = new ArrayList<String>(); |
| 106 | while(line != null){ |
| 107 | lines.add(line); |
| 108 | line = lreader.readLine(); |
| 109 | } |
| 110 | lreader.close(); |
| 111 | return lines; |
| 112 | }catch(IOException e) { |
| 113 | ExceptionMan.handle(e); |
| 114 | } |
| 115 | return null; |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Reads content from a text file. |
| 120 | */ |
| 121 | public static String getTextContent(String filename){ |
| 122 | return StringMan.join("\n", getLines(filename)); |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Removes a directory, even if it's NOT empty! |
| 127 | * @return true on success |
| 128 | */ |
| 129 | static public boolean removeDirectory(File path) { |
| 130 | if( path.exists() ) { |
| 131 | File[] files = path.listFiles(); |
| 132 | for(int i=0; i<files.length; i++) { |
| 133 | if(files[i].isDirectory()) { |
| 134 | removeDirectory(files[i]); |
| 135 | } |
| 136 | else { |
| 137 | files[i].delete(); |
| 138 | } |
| 139 | } |
| 140 | } |
| 141 | return(path.delete()); |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Creates an empty directory at the given path. |
| 146 | * If there already exists such a directory, it will |
| 147 | * be cleaned up. |
| 148 | */ |
| 149 | public static void createEmptyDirectory(File path){ |
| 150 | removeDirectory(path); |
| 151 | boolean ok = path.mkdir(); |
| 152 | if(!ok){ |
| 153 | ExceptionMan.die("!!! failed to create dir " + path); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * Creates the directory if it doesn't exist yet. |
| 159 | */ |
| 160 | public static void ensureExistence(String dir){ |
| 161 | File path = new File(dir); |
| 162 | if(!path.exists()){ |
| 163 | path.mkdirs(); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | public static String getGZIPVariant(String f){ |
| 168 | if(f.endsWith(".gz")){ |
| 169 | return f; |
| 170 | }else{ |
| 171 | String g = f + ".gz"; |
| 172 | if(exists(f) && exists(g)){ |
| 173 | File ff = new File(f); |
| 174 | File fg = new File(g); |
| 175 | String picked = null; |
| 176 | if(ff.lastModified() > fg.lastModified()){ |
| 177 | picked = f; |
| 178 | }else{ |
| 179 | picked = g; |
| 180 | } |
| 181 | UIMan.warn("Both regular and gzip'ed versions of this file exist; will use the newer one: " + picked); |
| 182 | return picked; |
| 183 | }else if(exists(g)){ |
| 184 | return g; |
| 185 | }else{ |
| 186 | return f; |
| 187 | } |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | public static boolean exists(String f){ |
| 192 | File path = new File(f); |
| 193 | return path.exists(); |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * Removes a file. |
| 198 | */ |
| 199 | public static boolean removeFile(String file){ |
| 200 | File f = new File(file); |
| 201 | return f.delete(); |
| 202 | } |
| 203 | |
| 204 | } |