src/com/owncloud/android/utils/MimetypeIconUtil.java

   1 package com.owncloud.android.utils;
   2
   3 import android.webkit.MimeTypeMap;
   4
   5 import com.owncloud.android.R;
   6
   7 import java.util.ArrayList;
   8 import java.util.Arrays;
   9 import java.util.Collections;
  10 import java.util.HashMap;
  11 import java.util.List;
  12 import java.util.Map;
  13
  14 /**
  15  * <p>Helper class for detecting the right icon for a file or directory,
  16  * based on its mime type and/or file extension.</p>
  17  *
  18  * This class maintains all the necessary mappings fot these detections.<br/>
  19  * In order to add further mappings, there are up to three look up maps that need further values:
  20  * <ol>
  21  *     <li>
  22  *         {@link MimetypeIconUtil#FILE_EXTENSION_TO_MIMETYPE_MAPPING}<br/>
  23  *         to add a new file extension to mime type mapping
  24  *     </li>
  25  *     <li>
  26  *         {@link MimetypeIconUtil#MIMETYPE_TO_ICON_MAPPING}<br/>
  27  *         to add a new mapping of a mime type to an icon mapping
  28  *     </li>
  29  *     <li>
  30  *         {@link MimetypeIconUtil#MAINMIMETYPE_TO_ICON_MAPPING}<br/>
  31  *         to add a new mapping for the main part of a mime type.
  32  *         This is a list of fallback mappings in case there is no mapping for the complete mime type
  33  *     </li>
  34  * </ol>
  35  */
  36 public class MimetypeIconUtil {
  37     /** Mapping: icon for mime type */
  38     private static final Map<String, Integer> MIMETYPE_TO_ICON_MAPPING = new HashMap<String, Integer>();
  39     /** Mapping: icon for main mime type (first part of a mime type declaration). */
  40     private static final Map<String, Integer> MAINMIMETYPE_TO_ICON_MAPPING = new HashMap<String, Integer>();
  41     /** Mapping: mime type for file extension. */
  42     private static final Map<String, List<String>> FILE_EXTENSION_TO_MIMETYPE_MAPPING =
  43             new HashMap<String, List<String>>();
  44
  45     static {
  46         populateFileExtensionMimeTypeMapping();
  47         populateMimeTypeIconMapping();
  48         populateMainMimeTypeMapping();
  49     }
  50
  51     /**
  52      * Returns the resource identifier of an image to use as icon associated to a known MIME type.
  53      *
  54      * @param mimetype MIME type string; if NULL, the method tries to guess it from the extension in filename
  55      * @param filename Name, with extension.
  56      * @return Identifier of an image resource.
  57      */
  58     public static int getFileTypeIconId(String mimetype, String filename) {
  59         List<String> possibleMimeTypes;
  60         if (mimetype == null) {
  61             possibleMimeTypes = determineMimeTypesByFilename(filename);
  62         } else {
  63             possibleMimeTypes = Collections.singletonList(mimetype);
  64         }
  65
  66         return determineIconIdByMimeTypeList(possibleMimeTypes);
  67     }
  68
  69     /**
  70      * determines the icon based on the mime type.
  71      *
  72      * @param mimetypes the mimetypes
  73      * @return the icon id, R.drawable.file if the mime type could not be matched at all or was {@code null}
  74      */
  75     private static int determineIconIdByMimeTypeList(List<String> mimetypes) {
  76         // no mime type leads to file
  77         if (mimetypes == null || mimetypes.size() < 1) {
  78             return R.drawable.file;
  79         } else {
  80
  81             // search for full mime type mapping
  82             for (String mimetype : mimetypes) {
  83                 Integer iconId = MIMETYPE_TO_ICON_MAPPING.get(mimetype);
  84
  85                 if (iconId != null) {
  86                     return iconId;
  87                 }
  88             }
  89
  90             // fallback to main mime type part mapping
  91             for (String mimetype : mimetypes) {
  92                 String mainMimetypePart = mimetype.split("/")[0];
  93
  94                 Integer iconId = MAINMIMETYPE_TO_ICON_MAPPING.get(mainMimetypePart);
  95                 if (iconId != null) {
  96                     return iconId;
  97                 }
  98             }
  99         }
 100
 101         // no match found at all, falling back to file
 102         return R.drawable.file;
 103     }
 104
 105     /**
 106      * determines the list of possible mime types for the given file, based on its extension.
 107      *
 108      * @param filename the file name
 109      * @return list of possible mime types (ordered), empty list in case no mime types found
 110      */
 111     private static List<String> determineMimeTypesByFilename(String filename) {
 112         String fileExtension = getExtension(filename);
 113
 114         // try detecting the mimetype based on the web app logic equivalent
 115         List<String> mimeTypeList = FILE_EXTENSION_TO_MIMETYPE_MAPPING.get(fileExtension);
 116         if (mimeTypeList != null && mimeTypeList.size() > 0) {
 117             return mimeTypeList;
 118         } else {
 119             // try detecting the mime type via android itself
 120             String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);
 121             if (mimeType != null) {
 122                 return Collections.singletonList(mimeType);
 123             } else {
 124                 return new ArrayList<String>();
 125             }
 126         }
 127     }
 128
 129     /**
 130      * provides the file extension of a given filename.
 131      *
 132      * @param filename the filename
 133      * @return the file extension
 134      */
 135     private static String getExtension(String filename) {
 136         String extension = filename.substring(filename.lastIndexOf(".") + 1).toLowerCase();
 137         return extension;
 138     }
 139
 140     /**
 141      * populates the mapping list:  full mime type --> icon.
 142      */
 143     private static void populateMimeTypeIconMapping() {
 144         MIMETYPE_TO_ICON_MAPPING.put("application/coreldraw", R.drawable.file_image);
 145         MIMETYPE_TO_ICON_MAPPING.put("application/epub+zip", R.drawable.file_doc);
 146         MIMETYPE_TO_ICON_MAPPING.put("application/font-sfnt", R.drawable.file_image);
 147         MIMETYPE_TO_ICON_MAPPING.put("application/font-woff", R.drawable.file_image);
 148         MIMETYPE_TO_ICON_MAPPING.put("application/illustrator", R.drawable.file_image);
 149         MIMETYPE_TO_ICON_MAPPING.put("application/javascript", R.drawable.file_code);
 150         MIMETYPE_TO_ICON_MAPPING.put("application/json", R.drawable.file_code);
 151         MIMETYPE_TO_ICON_MAPPING.put("application/msaccess", R.drawable.file);
 152         MIMETYPE_TO_ICON_MAPPING.put("application/msexcel", R.drawable.file_xls);
 153         MIMETYPE_TO_ICON_MAPPING.put("application/mspowerpoint", R.drawable.file_ppt);
 154         MIMETYPE_TO_ICON_MAPPING.put("application/msword", R.drawable.file_doc);
 155         MIMETYPE_TO_ICON_MAPPING.put("application/octet-stream", R.drawable.file);
 156         MIMETYPE_TO_ICON_MAPPING.put("application/postscript", R.drawable.file_image);
 157         MIMETYPE_TO_ICON_MAPPING.put("application/pdf", R.drawable.file_pdf);
 158         MIMETYPE_TO_ICON_MAPPING.put("application/rss+xml", R.drawable.file_code);
 159         MIMETYPE_TO_ICON_MAPPING.put("application/rtf", R.drawable.file_doc);
 160         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.android.package-archive", R.drawable.file_zip);
 161         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel", R.drawable.file_xls);
 162         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.addin.macroEnabled.12", R.drawable.file_xls);
 163         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.sheet.binary.macroEnabled.12", R.drawable.file_xls);
 164         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.sheet.macroEnabled.12", R.drawable.file_xls);
 165         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.template.macroEnabled.12", R.drawable.file_xls);
 166         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-fontobject", R.drawable.file_image);
 167         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint", R.drawable.file_ppt);
 168         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.addin.macroEnabled.12", R.drawable.file_ppt);
 169         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.presentation.macroEnabled.12", R.drawable.file_ppt);
 170         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.slideshow.macroEnabled.12", R.drawable.file_ppt);
 171         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.template.macroEnabled.12", R.drawable.file_ppt);
 172         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-word.document.macroEnabled.12", R.drawable.file_doc);
 173         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-word.template.macroEnabled.12", R.drawable.file_doc);
 174         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.presentation", R.drawable.file_ppt);
 175         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.presentation-template", R.drawable.file_ppt);
 176         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.spreadsheet", R.drawable.file_xls);
 177         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.spreadsheet-template", R.drawable.file_xls);
 178         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text", R.drawable.file_doc);
 179         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text-master", R.drawable.file_doc);
 180         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text-template", R.drawable.file_doc);
 181         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text-web", R.drawable.file_doc);
 182         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.presentationml.presentation", R.drawable.file_ppt);
 183         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.presentationml.slideshow", R.drawable.file_ppt);
 184         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.presentationml.template", R.drawable.file_ppt);
 185         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", R.drawable.file_xls);
 186         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.spreadsheetml.template", R.drawable.file_xls);
 187         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.wordprocessingml.document", R.drawable.file_doc);
 188         MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.wordprocessingml.template", R.drawable.file_doc);
 189         MIMETYPE_TO_ICON_MAPPING.put("application/x-7z-compressed", R.drawable.file_zip);
 190         MIMETYPE_TO_ICON_MAPPING.put("application/x-bin", R.drawable.file_application);
 191         MIMETYPE_TO_ICON_MAPPING.put("application/x-cbr", R.drawable.file_doc);
 192         MIMETYPE_TO_ICON_MAPPING.put("application/x-compressed", R.drawable.file_zip);
 193         MIMETYPE_TO_ICON_MAPPING.put("application/x-dcraw", R.drawable.file_image);
 194         MIMETYPE_TO_ICON_MAPPING.put("application/x-deb", R.drawable.file_zip);
 195         MIMETYPE_TO_ICON_MAPPING.put("application/x-font", R.drawable.file_image);
 196         MIMETYPE_TO_ICON_MAPPING.put("application/x-gimp", R.drawable.file_image);
 197         MIMETYPE_TO_ICON_MAPPING.put("application/x-gzip", R.drawable.file_zip);
 198         MIMETYPE_TO_ICON_MAPPING.put("application/x-ms-dos-executable", R.drawable.file_application);
 199         MIMETYPE_TO_ICON_MAPPING.put("application/x-msi", R.drawable.file_application);
 200         MIMETYPE_TO_ICON_MAPPING.put("application/x-iwork-numbers-sffnumbers", R.drawable.file_xls);
 201         MIMETYPE_TO_ICON_MAPPING.put("application/x-iwork-keynote-sffkey", R.drawable.file_ppt);
 202         MIMETYPE_TO_ICON_MAPPING.put("application/x-iwork-pages-sffpages", R.drawable.file_doc);
 203         MIMETYPE_TO_ICON_MAPPING.put("application/x-perl", R.drawable.file_code);
 204         MIMETYPE_TO_ICON_MAPPING.put("application/x-photoshop", R.drawable.file_image);
 205         MIMETYPE_TO_ICON_MAPPING.put("application/x-php", R.drawable.file_code);
 206         MIMETYPE_TO_ICON_MAPPING.put("application/x-rar-compressed", R.drawable.file_zip);
 207         MIMETYPE_TO_ICON_MAPPING.put("application/x-shockwave-flash", R.drawable.file_application);
 208         MIMETYPE_TO_ICON_MAPPING.put("application/x-tar", R.drawable.file_zip);
 209         MIMETYPE_TO_ICON_MAPPING.put("application/x-tex", R.drawable.file_doc);
 210         MIMETYPE_TO_ICON_MAPPING.put("application/xml", R.drawable.file_code);
 211         MIMETYPE_TO_ICON_MAPPING.put("application/yaml", R.drawable.file_code);
 212         MIMETYPE_TO_ICON_MAPPING.put("application/zip", R.drawable.file_zip);
 213         MIMETYPE_TO_ICON_MAPPING.put("database", R.drawable.file);
 214         MIMETYPE_TO_ICON_MAPPING.put("httpd/unix-directory", R.drawable.ic_menu_archive);
 215         MIMETYPE_TO_ICON_MAPPING.put("image/svg+xml", R.drawable.file_image);
 216         MIMETYPE_TO_ICON_MAPPING.put("image/vector", R.drawable.file_image);
 217         MIMETYPE_TO_ICON_MAPPING.put("text/calendar", R.drawable.file_calendar);
 218         MIMETYPE_TO_ICON_MAPPING.put("text/css", R.drawable.file_code);
 219         MIMETYPE_TO_ICON_MAPPING.put("text/csv", R.drawable.file_xls);
 220         MIMETYPE_TO_ICON_MAPPING.put("text/html", R.drawable.file_code);
 221         MIMETYPE_TO_ICON_MAPPING.put("text/vcard", R.drawable.file_vcard);
 222         MIMETYPE_TO_ICON_MAPPING.put("text/x-c", R.drawable.file_code);
 223         MIMETYPE_TO_ICON_MAPPING.put("text/x-c++src", R.drawable.file_code);
 224         MIMETYPE_TO_ICON_MAPPING.put("text/x-h", R.drawable.file_code);
 225         MIMETYPE_TO_ICON_MAPPING.put("text/x-python", R.drawable.file_code);
 226         MIMETYPE_TO_ICON_MAPPING.put("text/x-shellscript", R.drawable.file_code);
 227         MIMETYPE_TO_ICON_MAPPING.put("web", R.drawable.file_code);
 228         MIMETYPE_TO_ICON_MAPPING.put("DIR", R.drawable.ic_menu_archive);
 229     }
 230
 231     /**
 232      * populates the mapping list: main mime type --> icon.
 233      */
 234     private static void populateMainMimeTypeMapping() {
 235         MAINMIMETYPE_TO_ICON_MAPPING.put("audio", R.drawable.file_sound);
 236         MAINMIMETYPE_TO_ICON_MAPPING.put("database", R.drawable.file);
 237         MAINMIMETYPE_TO_ICON_MAPPING.put("httpd", R.drawable.file_zip);
 238         MAINMIMETYPE_TO_ICON_MAPPING.put("image", R.drawable.file_image);
 239         MAINMIMETYPE_TO_ICON_MAPPING.put("text", R.drawable.file_doc);
 240         MAINMIMETYPE_TO_ICON_MAPPING.put("video", R.drawable.file_movie);
 241         MAINMIMETYPE_TO_ICON_MAPPING.put("web", R.drawable.file_code);
 242     }
 243
 244     /**
 245      * populates the mapping list: file extension --> mime type.
 246      */
 247     private static void populateFileExtensionMimeTypeMapping() {
 248         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("3gp", Collections.singletonList("video/3gpp"));
 249         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("7z", Collections.singletonList("application/x-7z-compressed"));
 250         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("accdb", Collections.singletonList("application/msaccess"));
 251         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ai", Collections.singletonList("application/illustrator"));
 252         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("apk", Collections.singletonList("application/vnd.android.package-archive"));
 253         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("arw", Collections.singletonList("image/x-dcraw"));
 254         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("avi", Collections.singletonList("video/x-msvideo"));
 255         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bash", Collections.singletonList("text/x-shellscript"));
 256         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("blend", Collections.singletonList("application/x-blender"));
 257         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bin", Collections.singletonList("application/x-bin"));
 258         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bmp", Collections.singletonList("image/bmp"));
 259         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bpg", Collections.singletonList("image/bpg"));
 260         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cb7", Collections.singletonList("application/x-cbr"));
 261         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cba", Collections.singletonList("application/x-cbr"));
 262         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbr", Collections.singletonList("application/x-cbr"));
 263         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbt", Collections.singletonList("application/x-cbr"));
 264         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbtc", Collections.singletonList("application/x-cbr"));
 265         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbz", Collections.singletonList("application/x-cbr"));
 266         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cc", Collections.singletonList("text/x-c"));
 267         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cdr", Collections.singletonList("application/coreldraw"));
 268         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cnf", Collections.singletonList("text/plain"));
 269         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("conf", Collections.singletonList("text/plain"));
 270         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cpp", Collections.singletonList("text/x-c++src"));
 271         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cr2", Collections.singletonList("image/x-dcraw"));
 272         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("css", Collections.singletonList("text/css"));
 273         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("csv", Collections.singletonList("text/csv"));
 274         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cvbdl", Collections.singletonList("application/x-cbr"));
 275         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("c", Collections.singletonList("text/x-c"));
 276         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("c++", Collections.singletonList("text/x-c++src"));
 277         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dcr", Collections.singletonList("image/x-dcraw"));
 278         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("deb", Collections.singletonList("application/x-deb"));
 279         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dng", Collections.singletonList("image/x-dcraw"));
 280         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("doc", Collections.singletonList("application/msword"));
 281         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("docm", Collections.singletonList("application/vnd.ms-word.document.macroEnabled.12"));
 282         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("docx", Collections.singletonList("application/vnd.openxmlformats-officedocument.wordprocessingml.document"));
 283         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dot", Collections.singletonList("application/msword"));
 284         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dotx", Collections.singletonList("application/vnd.openxmlformats-officedocument.wordprocessingml.template"));
 285         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dv", Collections.singletonList("video/dv"));
 286         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("eot", Collections.singletonList("application/vnd.ms-fontobject"));
 287         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("epub", Collections.singletonList("application/epub+zip"));
 288         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("eps", Collections.singletonList("application/postscript"));
 289         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("erf", Collections.singletonList("image/x-dcraw"));
 290         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("exe", Collections.singletonList("application/x-ms-dos-executable"));
 291         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("flac", Collections.singletonList("audio/flac"));
 292         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("flv", Collections.singletonList("video/x-flv"));
 293         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gif", Collections.singletonList("image/gif"));
 294         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gz", Collections.singletonList("application/x-gzip"));
 295         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gzip", Collections.singletonList("application/x-gzip"));
 296         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("h", Collections.singletonList("text/x-h"));
 297         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("hh", Collections.singletonList("text/x-h"));
 298         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("html", Arrays.asList("text/html", "text/plain"));
 299         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("htm", Arrays.asList("text/html", "text/plain"));
 300         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ical", Collections.singletonList("text/calendar"));
 301         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ics", Collections.singletonList("text/calendar"));
 302         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("iiq", Collections.singletonList("image/x-dcraw"));
 303         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("impress", Collections.singletonList("text/impress"));
 304         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("jpeg", Collections.singletonList("image/jpeg"));
 305         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("jpg", Collections.singletonList("image/jpeg"));
 306         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("jps", Collections.singletonList("image/jpeg"));
 307         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("js", Arrays.asList("application/javascript", "text/plain"));
 308         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("json", Arrays.asList("application/json", "text/plain"));
 309         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("k25", Collections.singletonList("image/x-dcraw"));
 310         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("kdc", Collections.singletonList("image/x-dcraw"));
 311         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("key", Collections.singletonList("application/x-iwork-keynote-sffkey"));
 312         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("keynote", Collections.singletonList("application/x-iwork-keynote-sffkey"));
 313         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("kra", Collections.singletonList("application/x-krita"));
 314         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("m2t", Collections.singletonList("video/mp2t"));
 315         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("m4v", Collections.singletonList("video/mp4"));
 316         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("markdown", Collections.singletonList("text/markdown"));
 317         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mdown", Collections.singletonList("text/markdown"));
 318         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("md", Collections.singletonList("text/markdown"));
 319         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mdb", Collections.singletonList("application/msaccess"));
 320         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mdwn", Collections.singletonList("text/markdown"));
 321         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mkd", Collections.singletonList("text/markdown"));
 322         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mef", Collections.singletonList("image/x-dcraw"));
 323         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mkv", Collections.singletonList("video/x-matroska"));
 324         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mobi", Collections.singletonList("application/x-mobipocket-ebook"));
 325         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mov", Collections.singletonList("video/quicktime"));
 326         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mp3", Collections.singletonList("audio/mpeg"));
 327         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mp4", Collections.singletonList("video/mp4"));
 328         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mpeg", Collections.singletonList("video/mpeg"));
 329         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mpg", Collections.singletonList("video/mpeg"));
 330         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mpo", Collections.singletonList("image/jpeg"));
 331         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("msi", Collections.singletonList("application/x-msi"));
 332         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mts", Collections.singletonList("video/MP2T"));
 333         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mt2s", Collections.singletonList("video/MP2T"));
 334         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("nef", Collections.singletonList("image/x-dcraw"));
 335         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("numbers", Collections.singletonList("application/x-iwork-numbers-sffnumbers"));
 336         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odf", Collections.singletonList("application/vnd.oasis.opendocument.formula"));
 337         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odg", Collections.singletonList("application/vnd.oasis.opendocument.graphics"));
 338         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odp", Collections.singletonList("application/vnd.oasis.opendocument.presentation"));
 339         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ods", Collections.singletonList("application/vnd.oasis.opendocument.spreadsheet"));
 340         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odt", Collections.singletonList("application/vnd.oasis.opendocument.text"));
 341         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("oga", Collections.singletonList("audio/ogg"));
 342         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ogg", Collections.singletonList("audio/ogg"));
 343         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ogv", Collections.singletonList("video/ogg"));
 344         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("opus", Collections.singletonList("audio/ogg"));
 345         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("orf", Collections.singletonList("image/x-dcraw"));
 346         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("otf", Collections.singletonList("application/font-sfnt"));
 347         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pages", Collections.singletonList("application/x-iwork-pages-sffpages"));
 348         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pdf", Collections.singletonList("application/pdf"));
 349         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pfb", Collections.singletonList("application/x-font"));
 350         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pef", Collections.singletonList("image/x-dcraw"));
 351         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("php", Collections.singletonList("application/x-php"));
 352         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pl", Collections.singletonList("application/x-perl"));
 353         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("png", Collections.singletonList("image/png"));
 354         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pot", Collections.singletonList("application/vnd.ms-powerpoint"));
 355         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("potm", Collections.singletonList("application/vnd.ms-powerpoint.template.macroEnabled.12"));
 356         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("potx", Collections.singletonList("application/vnd.openxmlformats-officedocument.presentationml.template"));
 357         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppa", Collections.singletonList("application/vnd.ms-powerpoint"));
 358         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppam", Collections.singletonList("application/vnd.ms-powerpoint.addin.macroEnabled.12"));
 359         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pps", Collections.singletonList("application/vnd.ms-powerpoint"));
 360         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppsm", Collections.singletonList("application/vnd.ms-powerpoint.slideshow.macroEnabled.12"));
 361         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppsx", Collections.singletonList("application/vnd.openxmlformats-officedocument.presentationml.slideshow"));
 362         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppt", Collections.singletonList("application/vnd.ms-powerpoint"));
 363         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pptm", Collections.singletonList("application/vnd.ms-powerpoint.presentation.macroEnabled.12"));
 364         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pptx", Collections.singletonList("application/vnd.openxmlformats-officedocument.presentationml.presentation"));
 365         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ps", Collections.singletonList("application/postscript"));
 366         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("psd", Collections.singletonList("application/x-photoshop"));
 367         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("py", Collections.singletonList("text/x-python"));
 368         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("raf", Collections.singletonList("image/x-dcraw"));
 369         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("rar", Collections.singletonList("application/x-rar-compressed"));
 370         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("reveal", Collections.singletonList("text/reveal"));
 371         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("rtf", Collections.singletonList("application/rtf"));
 372         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("rw2", Collections.singletonList("image/x-dcraw"));
 373         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sgf", Collections.singletonList("application/sgf"));
 374         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sh-lib", Collections.singletonList("text/x-shellscript"));
 375         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sh", Collections.singletonList("text/x-shellscript"));
 376         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("srf", Collections.singletonList("image/x-dcraw"));
 377         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sr2", Collections.singletonList("image/x-dcraw"));
 378         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("svg", Arrays.asList("image/svg+xml", "text/plain"));
 379         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("swf", Arrays.asList("application/x-shockwave-flash", "application/octet-stream"));
 380         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tar", Collections.singletonList("application/x-tar"));
 381         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gz", Collections.singletonList("application/x-compressed"));
 382         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tex", Collections.singletonList("application/x-tex"));
 383         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tgz", Collections.singletonList("application/x-compressed"));
 384         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tiff", Collections.singletonList("image/tiff"));
 385         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tif", Collections.singletonList("image/tiff"));
 386         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ttf", Collections.singletonList("application/font-sfnt"));
 387         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("txt", Collections.singletonList("text/plain"));
 388         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("vcard", Collections.singletonList("text/vcard"));
 389         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("vcf", Collections.singletonList("text/vcard"));
 390         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("vob", Collections.singletonList("video/dvd"));
 391         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("wav", Collections.singletonList("audio/wav"));
 392         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("webm", Collections.singletonList("video/webm"));
 393         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("woff", Collections.singletonList("application/font-woff"));
 394         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("wmv", Collections.singletonList("video/x-ms-wmv"));
 395         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xcf", Collections.singletonList("application/x-gimp"));
 396         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xla", Collections.singletonList("application/vnd.ms-excel"));
 397         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlam", Collections.singletonList("application/vnd.ms-excel.addin.macroEnabled.12"));
 398         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xls", Collections.singletonList("application/vnd.ms-excel"));
 399         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlsb", Collections.singletonList("application/vnd.ms-excel.sheet.binary.macroEnabled.12"));
 400         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlsm", Collections.singletonList("application/vnd.ms-excel.sheet.macroEnabled.12"));
 401         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlsx", Collections.singletonList("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"));
 402         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlt", Collections.singletonList("application/vnd.ms-excel"));
 403         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xltm", Collections.singletonList("application/vnd.ms-excel.template.macroEnabled.12"));
 404         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xltx", Collections.singletonList("application/vnd.openxmlformats-officedocument.spreadsheetml.template"));
 405         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xml", Arrays.asList("application/xml", "text/plain"));
 406         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xrf", Collections.singletonList("image/x-dcraw"));
 407         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("yaml", Arrays.asList("application/yaml", "text/plain"));
 408         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("yml", Arrays.asList("application/yaml", "text/plain"));
 409         FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("zip", Collections.singletonList("application/zip"));
 410     }
 411 }