Merge branch 'new_filetype_icons' of https://github.com/owncloud/android into material_buttons

Conflicts:
	src/com/owncloud/android/utils/DisplayUtils.java

src/com/owncloud/android/datamodel/ThumbnailsCacheManager.java

@@ -74,8 +74,8 @@ public class ThumbnailsCacheManager {
 
     public static Bitmap mDefaultImg = 
             BitmapFactory.decodeResource(
-                    MainApp.getAppContext().getResources(), 
-                    DisplayUtils.getFileTypeIconId("image/png", "default.png")
+                    MainApp.getAppContext().getResources(),
+                    R.drawable.file_image
             );
 
     

src/com/owncloud/android/ui/adapter/FileListListAdapter.java

@@ -55,6 +55,7 @@ import com.owncloud.android.services.OperationsService.OperationsServiceBinder;
 import com.owncloud.android.ui.activity.ComponentsGetter;
 import com.owncloud.android.utils.DisplayUtils;
 import com.owncloud.android.utils.FileStorageUtils;
+import com.owncloud.android.utils.MimetypeIconUtil;
 
 
 /**
@@ -332,24 +333,15 @@ public class FileListListAdapter extends BaseAdapter implements ListAdapter {
 
 
                 } else {
-                    fileIcon.setImageResource(DisplayUtils.getFileTypeIconId(file.getMimetype(),
+                    fileIcon.setImageResource(MimetypeIconUtil.getFileTypeIconId(file.getMimetype(),
                             file.getFileName()));
                 }
 
             } else {
                 // Folder
-
-                if (checkIfFileIsSharedWithMe(file)) {
-                    fileIcon.setImageResource(R.drawable.shared_with_me_folder);
-                } else if (file.isShareByLink()) {
-                    // If folder is sharedByLink, icon folder must be changed to
-                    // folder-public one
-                    fileIcon.setImageResource(R.drawable.folder_public);
-                } else {
-                    fileIcon.setImageResource(
-                            DisplayUtils.getFileTypeIconId(file.getMimetype(), file.getFileName())
-                    );
-                }
+                fileIcon.setImageResource(
+                        MimetypeIconUtil.getFolderTypeIconId(
+                                checkIfFileIsSharedWithMe(file), file.isShareByLink()));
             }
         }
 

src/com/owncloud/android/ui/adapter/LocalFileListAdapter.java

@@ -39,6 +39,7 @@ import com.owncloud.android.R;
 import com.owncloud.android.datamodel.ThumbnailsCacheManager;
 import com.owncloud.android.utils.BitmapUtils;
 import com.owncloud.android.utils.DisplayUtils;
+import com.owncloud.android.utils.MimetypeIconUtil;
 
 /**
  * This Adapter populates a ListView with all files and directories contained
@@ -161,7 +162,7 @@ public class LocalFileListAdapter extends BaseAdapter implements ListAdapter {
                         }
                     }
                 } else {
-                    fileIcon.setImageResource(DisplayUtils.getFileTypeIconId(null, file.getName()));
+                    fileIcon.setImageResource(MimetypeIconUtil.getFileTypeIconId(null, file.getName()));
                 }  
 
             } else {

src/com/owncloud/android/ui/fragment/FileDetailFragment.java

@@ -48,6 +48,7 @@ import com.owncloud.android.ui.activity.FileDisplayActivity;
 import com.owncloud.android.ui.dialog.RemoveFileDialogFragment;
 import com.owncloud.android.ui.dialog.RenameFileDialogFragment;
 import com.owncloud.android.utils.DisplayUtils;
+import com.owncloud.android.utils.MimetypeIconUtil;
 
 import java.lang.ref.WeakReference;
 
@@ -403,7 +404,7 @@ public class FileDetailFragment extends FileFragment implements OnClickListener
         }
         ImageView iv = (ImageView) getView().findViewById(R.id.fdIcon);
         if (iv != null) {
-            iv.setImageResource(DisplayUtils.getFileTypeIconId(mimetype, filename));
+            iv.setImageResource(MimetypeIconUtil.getFileTypeIconId(mimetype, filename));
         }
     }
 

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

@@ -22,27 +22,14 @@
 
 package com.owncloud.android.utils;
 
-import java.math.BigDecimal;
-import java.net.IDN;
-import java.text.DateFormat;
-import java.util.Arrays;
-import java.util.Calendar;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Set;
-import java.util.Vector;
-
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.Context;
-import android.graphics.Color;
 import android.graphics.Point;
 import android.graphics.PorterDuff;
 import android.os.Build;
 import android.text.format.DateUtils;
 import android.view.Display;
-import android.webkit.MimeTypeMap;
 import android.widget.ProgressBar;
 import android.widget.SeekBar;
 
@@ -50,74 +37,41 @@ import com.owncloud.android.MainApp;
 import com.owncloud.android.R;
 import com.owncloud.android.datamodel.OCFile;
 
+import java.math.BigDecimal;
+import java.net.IDN;
+import java.text.DateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
+
 /**
  * A helper class for some string operations.
  */
 public class DisplayUtils {
     
     private static final String OWNCLOUD_APP_NAME = "ownCloud";
-
-    //private static String TAG = DisplayUtils.class.getSimpleName(); 
     
     private static final String[] sizeSuffixes = { "B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };
     private static final int[] sizeScales = { 0, 0, 0, 1, 1, 2, 2, 2, 2 };
 
-    private static HashMap<String, String> mimeType2HUmanReadable;
+    private static Map<String, String> mimeType2HumanReadable;
+
     static {
-        mimeType2HUmanReadable = new HashMap<String, String>();
+        mimeType2HumanReadable = new HashMap<String, String>();
         // images
-        mimeType2HUmanReadable.put("image/jpeg", "JPEG image");
-        mimeType2HUmanReadable.put("image/jpg", "JPEG image");
-        mimeType2HUmanReadable.put("image/png", "PNG image");
-        mimeType2HUmanReadable.put("image/bmp", "Bitmap image");
-        mimeType2HUmanReadable.put("image/gif", "GIF image");
-        mimeType2HUmanReadable.put("image/svg+xml", "JPEG image");
-        mimeType2HUmanReadable.put("image/tiff", "TIFF image");
+        mimeType2HumanReadable.put("image/jpeg", "JPEG image");
+        mimeType2HumanReadable.put("image/jpg", "JPEG image");
+        mimeType2HumanReadable.put("image/png", "PNG image");
+        mimeType2HumanReadable.put("image/bmp", "Bitmap image");
+        mimeType2HumanReadable.put("image/gif", "GIF image");
+        mimeType2HumanReadable.put("image/svg+xml", "JPEG image");
+        mimeType2HumanReadable.put("image/tiff", "TIFF image");
         // music
-        mimeType2HUmanReadable.put("audio/mpeg", "MP3 music file");
-        mimeType2HUmanReadable.put("application/ogg", "OGG music file");
-
+        mimeType2HumanReadable.put("audio/mpeg", "MP3 music file");
+        mimeType2HumanReadable.put("application/ogg", "OGG music file");
     }
 
-    private static final String TYPE_APPLICATION = "application";
-    private static final String TYPE_AUDIO = "audio";
-    private static final String TYPE_IMAGE = "image";
-    private static final String TYPE_TXT = "text";
-    private static final String TYPE_VIDEO = "video";
-    
-    private static final String SUBTYPE_PDF = "pdf";
-    private static final String SUBTYPE_XML = "xml";
-    private static final String[] SUBTYPES_DOCUMENT = { 
-        "msword",
-        "vnd.openxmlformats-officedocument.wordprocessingml.document",
-        "vnd.oasis.opendocument.text",
-        "rtf",
-        "javascript"
-    };
-    private static Set<String> SUBTYPES_DOCUMENT_SET = new HashSet<String>(Arrays.asList(SUBTYPES_DOCUMENT));
-    private static final String[] SUBTYPES_SPREADSHEET = {
-        "msexcel",
-        "vnd.ms-excel",
-        "vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-        "vnd.oasis.opendocument.spreadsheet"
-    };
-    private static Set<String> SUBTYPES_SPREADSHEET_SET = new HashSet<String>(Arrays.asList(SUBTYPES_SPREADSHEET));
-    private static final String[] SUBTYPES_PRESENTATION = { 
-        "mspowerpoint",
-        "vnd.ms-powerpoint",
-        "vnd.openxmlformats-officedocument.presentationml.presentation",
-        "vnd.oasis.opendocument.presentation"
-    };
-    private static Set<String> SUBTYPES_PRESENTATION_SET = new HashSet<String>(Arrays.asList(SUBTYPES_PRESENTATION));
-    private static final String[] SUBTYPES_COMPRESSED = {"x-tar", "x-gzip", "zip"};
-    private static final Set<String> SUBTYPES_COMPRESSED_SET = new HashSet<String>(Arrays.asList(SUBTYPES_COMPRESSED));
-    private static final String SUBTYPE_OCTET_STREAM = "octet-stream";
-    private static final String EXTENSION_RAR = "rar";
-    private static final String EXTENSION_RTF = "rtf";
-    private static final String EXTENSION_3GP = "3gp";
-    private static final String EXTENSION_PY = "py";
-    private static final String EXTENSION_JS = "js";
-    
     /**
      * Converts the file size in bytes to human readable output.
      * <ul>
@@ -130,14 +84,14 @@ public class DisplayUtils {
      */
     public static String bytesToHumanReadable(long bytes) {
         double result = bytes;
-        int attachedsuff = 0;
-        while (result > 1024 && attachedsuff < sizeSuffixes.length) {
+        int attachedSuff = 0;
+        while (result > 1024 && attachedSuff < sizeSuffixes.length) {
             result /= 1024.;
-            attachedsuff++;
+            attachedSuff++;
         }
 
         return new BigDecimal(result).setScale(
-                sizeScales[attachedsuff], BigDecimal.ROUND_HALF_UP) + " " + sizeSuffixes[attachedsuff];
+                sizeScales[attachedSuff], BigDecimal.ROUND_HALF_UP) + " " + sizeSuffixes[attachedSuff];
     }
 
     /**
@@ -148,100 +102,14 @@ public class DisplayUtils {
      * @return A human friendly version of the MIME type
      */
     public static String convertMIMEtoPrettyPrint(String mimetype) {
-        if (mimeType2HUmanReadable.containsKey(mimetype)) {
-            return mimeType2HUmanReadable.get(mimetype);
+        if (mimeType2HumanReadable.containsKey(mimetype)) {
+            return mimeType2HumanReadable.get(mimetype);
         }
         if (mimetype.split("/").length >= 2)
             return mimetype.split("/")[1].toUpperCase() + " file";
         return "Unknown type";
     }
-    
-    
-    /**
-     * Returns the resource identifier of an image to use as icon associated to a known MIME type.
-     * 
-     * @param mimetype      MIME type string; if NULL, the method tries to guess it from the extension in filename
-     * @param filename      Name, with extension.
-     * @return              Identifier of an image resource.
-     */
-    public static int getFileTypeIconId(String mimetype, String filename) {
-
-        if (mimetype == null) {
-            String fileExtension = getExtension(filename);
-            mimetype = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);
-            if (mimetype == null) {
-                mimetype = TYPE_APPLICATION + "/" + SUBTYPE_OCTET_STREAM;
-            }
-        } 
-            
-        if ("DIR".equals(mimetype)) {
-            return R.drawable.ic_menu_archive;
-
-        } else {
-            String [] parts = mimetype.split("/");
-            String type = parts[0];
-            String subtype = (parts.length > 1) ? parts[1] : "";
-            
-            if(TYPE_TXT.equals(type)) {
-                return R.drawable.file_doc;
-    
-            } else if(TYPE_IMAGE.equals(type)) {
-                return R.drawable.file_image;
-                
-            } else if(TYPE_VIDEO.equals(type)) {
-                return R.drawable.file_movie;
-                
-            } else if(TYPE_AUDIO.equals(type)) {  
-                return R.drawable.file_sound;
-                
-            } else if(TYPE_APPLICATION.equals(type)) {
-                
-                if (SUBTYPE_PDF.equals(subtype)) {
-                    return R.drawable.file_pdf;
-                    
-                } else if (SUBTYPE_XML.equals(subtype)) {
-                    return R.drawable.file_doc;
-
-                } else if (SUBTYPES_DOCUMENT_SET.contains(subtype)) {
-                    return R.drawable.file_doc;
-
-                } else if (SUBTYPES_SPREADSHEET_SET.contains(subtype)) {
-                    return R.drawable.file_xls;
-
-                } else if (SUBTYPES_PRESENTATION_SET.contains(subtype)) {
-                    return R.drawable.file_ppt;
 
-                } else if (SUBTYPES_COMPRESSED_SET.contains(subtype)) {
-                    return R.drawable.file_zip;
-
-                } else if (SUBTYPE_OCTET_STREAM.equals(subtype) ) {
-                    if (getExtension(filename).equalsIgnoreCase(EXTENSION_RAR)) {
-                        return R.drawable.file_zip;
-                        
-                    } else if (getExtension(filename).equalsIgnoreCase(EXTENSION_RTF)) {
-                        return R.drawable.file_doc;
-                        
-                    } else if (getExtension(filename).equalsIgnoreCase(EXTENSION_3GP)) {
-                        return R.drawable.file_movie;
-                     
-                    } else if ( getExtension(filename).equalsIgnoreCase(EXTENSION_PY) ||
-                                getExtension(filename).equalsIgnoreCase(EXTENSION_JS)) {
-                        return R.drawable.file_doc;
-                    } 
-                } 
-            }
-        }
-
-        // default icon
-        return R.drawable.file;
-    }
-
-    
-    private static String getExtension(String filename) {
-        String extension = filename.substring(filename.lastIndexOf(".") + 1).toLowerCase();
-        return extension;
-    }
-    
     /**
      * Converts Unix time to human readable format
      * @param milliseconds that have passed since 01/01/1970
@@ -253,7 +121,6 @@ public class DisplayUtils {
         return df.format(date);
     }
     
-    
     public static int getSeasonalIconId() {
         if (Calendar.getInstance().get(Calendar.DAY_OF_YEAR) >= 354 &&
                 MainApp.getAppContext().getString(R.string.app_name).equals(OWNCLOUD_APP_NAME)) {

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

@@ -0,0 +1,428 @@
+package com.owncloud.android.utils;
+
+import android.webkit.MimeTypeMap;
+
+import com.owncloud.android.R;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * <p>Helper class for detecting the right icon for a file or folder,
+ * based on its mime type and file extension.</p>
+ *
+ * This class maintains all the necessary mappings fot these detections.<br/>
+ * In order to add further mappings, there are up to three look up maps that need further values:
+ * <ol>
+ *     <li>
+ *         {@link MimetypeIconUtil#FILE_EXTENSION_TO_MIMETYPE_MAPPING}<br/>
+ *         to add a new file extension to mime type mapping
+ *     </li>
+ *     <li>
+ *         {@link MimetypeIconUtil#MIMETYPE_TO_ICON_MAPPING}<br/>
+ *         to add a new mapping of a mime type to an icon mapping
+ *     </li>
+ *     <li>
+ *         {@link MimetypeIconUtil#MAINMIMETYPE_TO_ICON_MAPPING}<br/>
+ *         to add a new mapping for the main part of a mime type.
+ *         This is a list of fallback mappings in case there is no mapping for the complete mime type
+ *     </li>
+ * </ol>
+ */
+public class MimetypeIconUtil {
+    /** Mapping: icon for mime type */
+    private static final Map<String, Integer> MIMETYPE_TO_ICON_MAPPING = new HashMap<String, Integer>();
+    /** Mapping: icon for main mime type (first part of a mime type declaration). */
+    private static final Map<String, Integer> MAINMIMETYPE_TO_ICON_MAPPING = new HashMap<String, Integer>();
+    /** Mapping: mime type for file extension. */
+    private static final Map<String, List<String>> FILE_EXTENSION_TO_MIMETYPE_MAPPING =
+            new HashMap<String, List<String>>();
+
+    static {
+        populateFileExtensionMimeTypeMapping();
+        populateMimeTypeIconMapping();
+        populateMainMimeTypeMapping();
+    }
+
+    /**
+     * Returns the resource identifier of an image to use as icon associated to a known MIME type.
+     *
+     * @param mimetype MIME type string; if NULL, the method tries to guess it from the extension in filename
+     * @param filename Name, with extension.
+     * @return Identifier of an image resource.
+     */
+    public static int getFileTypeIconId(String mimetype, String filename) {
+        List<String> possibleMimeTypes;
+        if (mimetype == null) {
+            possibleMimeTypes = determineMimeTypesByFilename(filename);
+        } else {
+            possibleMimeTypes = Collections.singletonList(mimetype);
+        }
+
+        return determineIconIdByMimeTypeList(possibleMimeTypes);
+    }
+
+    /**
+     * Returns the resource identifier of an image to use as icon associated to a type of folder.
+     *
+     * @param isSharedWithUser flag if the folder is shared with the user
+     * @param isShareByLink flag if the folder is shared by link
+     * @return Identifier of an image resource.
+     */
+    public static int getFolderTypeIconId(boolean isSharedWithUser, boolean isShareByLink) {
+        if (isSharedWithUser) {
+            return R.drawable.shared_with_me_folder;
+        } else if (isShareByLink) {
+            return R.drawable.folder_public;
+        }
+
+        return R.drawable.ic_menu_archive;
+    }
+
+    /**
+     * determines the icon based on the mime type.
+     *
+     * @param mimetypes the mimetypes
+     * @return the icon id, R.drawable.file if the mime type could not be matched at all or was {@code null}
+     */
+    private static int determineIconIdByMimeTypeList(List<String> mimetypes) {
+        // no mime type leads to file
+        if (mimetypes == null || mimetypes.size() < 1) {
+            return R.drawable.file;
+        } else {
+
+            // search for full mime type mapping
+            for (String mimetype : mimetypes) {
+                Integer iconId = MIMETYPE_TO_ICON_MAPPING.get(mimetype);
+
+                if (iconId != null) {
+                    return iconId;
+                }
+            }
+
+            // fallback to main mime type part mapping
+            for (String mimetype : mimetypes) {
+                String mainMimetypePart = mimetype.split("/")[0];
+
+                Integer iconId = MAINMIMETYPE_TO_ICON_MAPPING.get(mainMimetypePart);
+                if (iconId != null) {
+                    return iconId;
+                }
+            }
+        }
+
+        // no match found at all, falling back to file
+        return R.drawable.file;
+    }
+
+    /**
+     * determines the list of possible mime types for the given file, based on its extension.
+     *
+     * @param filename the file name
+     * @return list of possible mime types (ordered), empty list in case no mime types found
+     */
+    private static List<String> determineMimeTypesByFilename(String filename) {
+        String fileExtension = getExtension(filename);
+
+        // try detecting the mimetype based on the web app logic equivalent
+        List<String> mimeTypeList = FILE_EXTENSION_TO_MIMETYPE_MAPPING.get(fileExtension);
+        if (mimeTypeList != null && mimeTypeList.size() > 0) {
+            return mimeTypeList;
+        } else {
+            // try detecting the mime type via android itself
+            String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);
+            if (mimeType != null) {
+                return Collections.singletonList(mimeType);
+            } else {
+                return new ArrayList<String>();
+            }
+        }
+    }
+
+    /**
+     * provides the file extension of a given filename.
+     *
+     * @param filename the filename
+     * @return the file extension
+     */
+    private static String getExtension(String filename) {
+        String extension = filename.substring(filename.lastIndexOf(".") + 1).toLowerCase();
+        return extension;
+    }
+
+    /**
+     * populates the mapping list:  full mime type --> icon.
+     */
+    private static void populateMimeTypeIconMapping() {
+        MIMETYPE_TO_ICON_MAPPING.put("application/coreldraw", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/epub+zip", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/font-sfnt", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/font-woff", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/illustrator", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/javascript", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/json", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/msaccess", R.drawable.file);
+        MIMETYPE_TO_ICON_MAPPING.put("application/msexcel", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/mspowerpoint", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/msword", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/octet-stream", R.drawable.file);
+        MIMETYPE_TO_ICON_MAPPING.put("application/postscript", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/pdf", R.drawable.file_pdf);
+        MIMETYPE_TO_ICON_MAPPING.put("application/rss+xml", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/rtf", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.android.package-archive", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.addin.macroEnabled.12", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.sheet.binary.macroEnabled.12", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.sheet.macroEnabled.12", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.template.macroEnabled.12", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-fontobject", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.addin.macroEnabled.12", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.presentation.macroEnabled.12", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.slideshow.macroEnabled.12", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.template.macroEnabled.12", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-word.document.macroEnabled.12", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-word.template.macroEnabled.12", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.presentation", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.presentation-template", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.spreadsheet", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.spreadsheet-template", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text-master", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text-template", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text-web", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.presentationml.presentation", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.presentationml.slideshow", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.presentationml.template", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.spreadsheetml.template", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.wordprocessingml.document", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.wordprocessingml.template", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-7z-compressed", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-bin", R.drawable.file_application);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-cbr", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-compressed", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-dcraw", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-deb", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-font", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-gimp", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-gzip", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-ms-dos-executable", R.drawable.file_application);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-msi", R.drawable.file_application);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-iwork-numbers-sffnumbers", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-iwork-keynote-sffkey", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-iwork-pages-sffpages", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-perl", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-photoshop", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-php", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-rar-compressed", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-shockwave-flash", R.drawable.file_application);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-tar", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-tex", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/xml", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/yaml", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/zip", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("database", R.drawable.file);
+        MIMETYPE_TO_ICON_MAPPING.put("httpd/unix-directory", R.drawable.ic_menu_archive);
+        MIMETYPE_TO_ICON_MAPPING.put("image/svg+xml", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("image/vector", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("text/calendar", R.drawable.file_calendar);
+        MIMETYPE_TO_ICON_MAPPING.put("text/css", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/csv", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("text/html", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/vcard", R.drawable.file_vcard);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-c", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-c++src", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-h", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-python", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-shellscript", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("web", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("DIR", R.drawable.ic_menu_archive);
+    }
+
+    /**
+     * populates the mapping list: main mime type --> icon.
+     */
+    private static void populateMainMimeTypeMapping() {
+        MAINMIMETYPE_TO_ICON_MAPPING.put("audio", R.drawable.file_sound);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("database", R.drawable.file);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("httpd", R.drawable.file_zip);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("image", R.drawable.file_image);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("text", R.drawable.file_doc);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("video", R.drawable.file_movie);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("web", R.drawable.file_code);
+    }
+
+    /**
+     * populates the mapping list: file extension --> mime type.
+     */
+    private static void populateFileExtensionMimeTypeMapping() {
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("3gp", Collections.singletonList("video/3gpp"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("7z", Collections.singletonList("application/x-7z-compressed"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("accdb", Collections.singletonList("application/msaccess"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ai", Collections.singletonList("application/illustrator"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("apk", Collections.singletonList("application/vnd.android.package-archive"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("arw", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("avi", Collections.singletonList("video/x-msvideo"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bash", Collections.singletonList("text/x-shellscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("blend", Collections.singletonList("application/x-blender"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bin", Collections.singletonList("application/x-bin"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bmp", Collections.singletonList("image/bmp"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bpg", Collections.singletonList("image/bpg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cb7", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cba", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbr", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbt", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbtc", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbz", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cc", Collections.singletonList("text/x-c"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cdr", Collections.singletonList("application/coreldraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cnf", Collections.singletonList("text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("conf", Collections.singletonList("text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cpp", Collections.singletonList("text/x-c++src"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cr2", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("css", Collections.singletonList("text/css"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("csv", Collections.singletonList("text/csv"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cvbdl", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("c", Collections.singletonList("text/x-c"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("c++", Collections.singletonList("text/x-c++src"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dcr", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("deb", Collections.singletonList("application/x-deb"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dng", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("doc", Collections.singletonList("application/msword"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("docm", Collections.singletonList("application/vnd.ms-word.document.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("docx", Collections.singletonList("application/vnd.openxmlformats-officedocument.wordprocessingml.document"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dot", Collections.singletonList("application/msword"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dotx", Collections.singletonList("application/vnd.openxmlformats-officedocument.wordprocessingml.template"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dv", Collections.singletonList("video/dv"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("eot", Collections.singletonList("application/vnd.ms-fontobject"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("epub", Collections.singletonList("application/epub+zip"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("eps", Collections.singletonList("application/postscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("erf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("exe", Collections.singletonList("application/x-ms-dos-executable"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("flac", Collections.singletonList("audio/flac"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("flv", Collections.singletonList("video/x-flv"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gif", Collections.singletonList("image/gif"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gz", Collections.singletonList("application/x-gzip"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gzip", Collections.singletonList("application/x-gzip"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("h", Collections.singletonList("text/x-h"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("hh", Collections.singletonList("text/x-h"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("html", Arrays.asList("text/html", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("htm", Arrays.asList("text/html", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ical", Collections.singletonList("text/calendar"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ics", Collections.singletonList("text/calendar"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("iiq", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("impress", Collections.singletonList("text/impress"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("jpeg", Collections.singletonList("image/jpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("jpg", Collections.singletonList("image/jpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("jps", Collections.singletonList("image/jpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("js", Arrays.asList("application/javascript", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("json", Arrays.asList("application/json", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("k25", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("kdc", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("key", Collections.singletonList("application/x-iwork-keynote-sffkey"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("keynote", Collections.singletonList("application/x-iwork-keynote-sffkey"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("kra", Collections.singletonList("application/x-krita"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("m2t", Collections.singletonList("video/mp2t"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("m4v", Collections.singletonList("video/mp4"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("markdown", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mdown", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("md", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mdb", Collections.singletonList("application/msaccess"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mdwn", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mkd", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mef", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mkv", Collections.singletonList("video/x-matroska"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mobi", Collections.singletonList("application/x-mobipocket-ebook"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mov", Collections.singletonList("video/quicktime"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mp3", Collections.singletonList("audio/mpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mp4", Collections.singletonList("video/mp4"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mpeg", Collections.singletonList("video/mpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mpg", Collections.singletonList("video/mpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mpo", Collections.singletonList("image/jpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("msi", Collections.singletonList("application/x-msi"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mts", Collections.singletonList("video/MP2T"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mt2s", Collections.singletonList("video/MP2T"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("nef", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("numbers", Collections.singletonList("application/x-iwork-numbers-sffnumbers"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odf", Collections.singletonList("application/vnd.oasis.opendocument.formula"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odg", Collections.singletonList("application/vnd.oasis.opendocument.graphics"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odp", Collections.singletonList("application/vnd.oasis.opendocument.presentation"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ods", Collections.singletonList("application/vnd.oasis.opendocument.spreadsheet"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odt", Collections.singletonList("application/vnd.oasis.opendocument.text"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("oga", Collections.singletonList("audio/ogg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ogg", Collections.singletonList("audio/ogg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ogv", Collections.singletonList("video/ogg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("opus", Collections.singletonList("audio/ogg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("orf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("otf", Collections.singletonList("application/font-sfnt"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pages", Collections.singletonList("application/x-iwork-pages-sffpages"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pdf", Collections.singletonList("application/pdf"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pfb", Collections.singletonList("application/x-font"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pef", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("php", Collections.singletonList("application/x-php"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pl", Collections.singletonList("application/x-perl"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("png", Collections.singletonList("image/png"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pot", Collections.singletonList("application/vnd.ms-powerpoint"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("potm", Collections.singletonList("application/vnd.ms-powerpoint.template.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("potx", Collections.singletonList("application/vnd.openxmlformats-officedocument.presentationml.template"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppa", Collections.singletonList("application/vnd.ms-powerpoint"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppam", Collections.singletonList("application/vnd.ms-powerpoint.addin.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pps", Collections.singletonList("application/vnd.ms-powerpoint"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppsm", Collections.singletonList("application/vnd.ms-powerpoint.slideshow.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppsx", Collections.singletonList("application/vnd.openxmlformats-officedocument.presentationml.slideshow"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppt", Collections.singletonList("application/vnd.ms-powerpoint"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pptm", Collections.singletonList("application/vnd.ms-powerpoint.presentation.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pptx", Collections.singletonList("application/vnd.openxmlformats-officedocument.presentationml.presentation"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ps", Collections.singletonList("application/postscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("psd", Collections.singletonList("application/x-photoshop"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("py", Collections.singletonList("text/x-python"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("raf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("rar", Collections.singletonList("application/x-rar-compressed"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("reveal", Collections.singletonList("text/reveal"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("rtf", Collections.singletonList("application/rtf"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("rw2", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sgf", Collections.singletonList("application/sgf"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sh-lib", Collections.singletonList("text/x-shellscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sh", Collections.singletonList("text/x-shellscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("srf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sr2", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("svg", Arrays.asList("image/svg+xml", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("swf", Arrays.asList("application/x-shockwave-flash", "application/octet-stream"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tar", Collections.singletonList("application/x-tar"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gz", Collections.singletonList("application/x-compressed"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tex", Collections.singletonList("application/x-tex"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tgz", Collections.singletonList("application/x-compressed"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tiff", Collections.singletonList("image/tiff"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tif", Collections.singletonList("image/tiff"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ttf", Collections.singletonList("application/font-sfnt"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("txt", Collections.singletonList("text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("vcard", Collections.singletonList("text/vcard"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("vcf", Collections.singletonList("text/vcard"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("vob", Collections.singletonList("video/dvd"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("wav", Collections.singletonList("audio/wav"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("webm", Collections.singletonList("video/webm"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("woff", Collections.singletonList("application/font-woff"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("wmv", Collections.singletonList("video/x-ms-wmv"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xcf", Collections.singletonList("application/x-gimp"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xla", Collections.singletonList("application/vnd.ms-excel"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlam", Collections.singletonList("application/vnd.ms-excel.addin.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xls", Collections.singletonList("application/vnd.ms-excel"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlsb", Collections.singletonList("application/vnd.ms-excel.sheet.binary.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlsm", Collections.singletonList("application/vnd.ms-excel.sheet.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlsx", Collections.singletonList("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlt", Collections.singletonList("application/vnd.ms-excel"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xltm", Collections.singletonList("application/vnd.ms-excel.template.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xltx", Collections.singletonList("application/vnd.openxmlformats-officedocument.spreadsheetml.template"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xml", Arrays.asList("application/xml", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xrf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("yaml", Arrays.asList("application/yaml", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("yml", Arrays.asList("application/yaml", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("zip", Collections.singletonList("application/zip"));
+    }
+}