X-Git-Url: http://git.linex4red.de/pub/Android/ownCloud.git/blobdiff_plain/a72d7bfe2160a47a3fd49c08d72933a49e9e1519..e1245bbda7894e1a3028d2b54a6918e4bdd46ae2:/src/com/owncloud/android/datamodel/FileDataStorageManager.java

diff --git a/src/com/owncloud/android/datamodel/FileDataStorageManager.java b/src/com/owncloud/android/datamodel/FileDataStorageManager.java
index 69f36eac..fb55e933 100644
--- a/src/com/owncloud/android/datamodel/FileDataStorageManager.java
+++ b/src/com/owncloud/android/datamodel/FileDataStorageManager.java
@@ -20,49 +20,78 @@ package com.owncloud.android.datamodel;
 
 import java.io.File;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
-import java.util.List;
 import java.util.Vector;
 
-import com.owncloud.android.DisplayUtils;
-import com.owncloud.android.Log_OC;
-import com.owncloud.android.db.ProviderMeta;
+import com.owncloud.android.MainApp;
 import com.owncloud.android.db.ProviderMeta.ProviderTableMeta;
 import com.owncloud.android.utils.FileStorageUtils;
+import com.owncloud.android.utils.Log_OC;
+
 
 import android.accounts.Account;
 import android.content.ContentProviderClient;
 import android.content.ContentProviderOperation;
 import android.content.ContentProviderResult;
 import android.content.ContentResolver;
+import android.content.ContentUris;
 import android.content.ContentValues;
 import android.content.OperationApplicationException;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.RemoteException;
 
-public class FileDataStorageManager implements DataStorageManager {
+public class FileDataStorageManager {
+
+    public static final int ROOT_PARENT_ID = 0;
 
     private ContentResolver mContentResolver;
-    private ContentProviderClient mContentProvider;
+    private ContentProviderClient mContentProviderClient;
     private Account mAccount;
 
-    private static String TAG = "FileDataStorageManager";
+    private static String TAG = FileDataStorageManager.class.getSimpleName();
 
+    
     public FileDataStorageManager(Account account, ContentResolver cr) {
-        mContentProvider = null;
+        mContentProviderClient = null;
         mContentResolver = cr;
         mAccount = account;
     }
 
     public FileDataStorageManager(Account account, ContentProviderClient cp) {
-        mContentProvider = cp;
+        mContentProviderClient = cp;
         mContentResolver = null;
         mAccount = account;
     }
 
-    @Override
+    
+    public void setAccount(Account account) {
+        mAccount = account;
+    }
+
+    public Account getAccount() {
+        return mAccount;
+    }
+
+    public void setContentResolver(ContentResolver cr) {
+        mContentResolver = cr;
+    }
+
+    public ContentResolver getContentResolver() {
+        return mContentResolver;
+    }
+
+    public void setContentProviderClient(ContentProviderClient cp) {
+        mContentProviderClient = cp;
+    }
+
+    public ContentProviderClient getContentProviderClient() {
+        return mContentProviderClient;
+    }
+    
+
     public OCFile getFileByPath(String path) {
         Cursor c = getCursorForValue(ProviderTableMeta.FILE_PATH, path);
         OCFile file = null;
@@ -70,22 +99,13 @@ public class FileDataStorageManager implements DataStorageManager {
             file = createFileInstance(c);
         }
         c.close();
-        if (file == null && OCFile.PATH_SEPARATOR.equals(path)) {
+        if (file == null && OCFile.ROOT_PATH.equals(path)) {
             return createRootDir(); // root should always exist
         }
         return file;
     }
 
 
-    private OCFile createRootDir() {
-        OCFile file = new OCFile(OCFile.PATH_SEPARATOR);
-        file.setMimetype("DIR");
-        file.setParentId(DataStorageManager.ROOT_PARENT_ID);
-        saveFile(file);
-        return file;
-    }
-
-    @Override
     public OCFile getFileById(long id) {
         Cursor c = getCursorForValue(ProviderTableMeta._ID, String.valueOf(id));
         OCFile file = null;
@@ -106,17 +126,42 @@ public class FileDataStorageManager implements DataStorageManager {
         return file;
     }
 
-    @Override
     public boolean fileExists(long id) {
         return fileExists(ProviderTableMeta._ID, String.valueOf(id));
     }
 
-    @Override
     public boolean fileExists(String path) {
         return fileExists(ProviderTableMeta.FILE_PATH, path);
     }
 
-    @Override
+    
+    public Vector<OCFile> getFolderContent(OCFile f) {
+        if (f != null && f.isFolder() && f.getFileId() != -1) {
+            return getFolderContent(f.getFileId());
+
+        } else {
+            return new Vector<OCFile>();
+        }
+    }
+    
+    
+    public Vector<OCFile> getFolderImages(OCFile folder) {
+        Vector<OCFile> ret = new Vector<OCFile>(); 
+        if (folder != null) {
+            // TODO better implementation, filtering in the access to database (if possible) instead of here 
+            Vector<OCFile> tmp = getFolderContent(folder);
+            OCFile current = null; 
+            for (int i=0; i<tmp.size(); i++) {
+                current = tmp.get(i);
+                if (current.isImage()) {
+                    ret.add(current);
+                }
+            }
+        }
+        return ret;
+    }
+
+    
     public boolean saveFile(OCFile file) {
         boolean overriden = false;
         ContentValues cv = new ContentValues();
@@ -126,23 +171,27 @@ public class FileDataStorageManager implements DataStorageManager {
         cv.put(ProviderTableMeta.FILE_CONTENT_LENGTH, file.getFileLength());
         cv.put(ProviderTableMeta.FILE_CONTENT_TYPE, file.getMimetype());
         cv.put(ProviderTableMeta.FILE_NAME, file.getFileName());
-        if (file.getParentId() != 0)
+        //if (file.getParentId() != DataStorageManager.ROOT_PARENT_ID)
             cv.put(ProviderTableMeta.FILE_PARENT, file.getParentId());
         cv.put(ProviderTableMeta.FILE_PATH, file.getRemotePath());
-        if (!file.isDirectory())
+        if (!file.isFolder())
             cv.put(ProviderTableMeta.FILE_STORAGE_PATH, file.getStoragePath());
         cv.put(ProviderTableMeta.FILE_ACCOUNT_OWNER, mAccount.name);
         cv.put(ProviderTableMeta.FILE_LAST_SYNC_DATE, file.getLastSyncDateForProperties());
         cv.put(ProviderTableMeta.FILE_LAST_SYNC_DATE_FOR_DATA, file.getLastSyncDateForData());
         cv.put(ProviderTableMeta.FILE_KEEP_IN_SYNC, file.keepInSync() ? 1 : 0);
+        cv.put(ProviderTableMeta.FILE_ETAG, file.getEtag());
 
         boolean sameRemotePath = fileExists(file.getRemotePath());
         if (sameRemotePath ||
                 fileExists(file.getFileId())        ) {           // for renamed files; no more delete and create
 
+            OCFile oldFile = null;
             if (sameRemotePath) {
-                OCFile oldFile = getFileByPath(file.getRemotePath());
+                oldFile = getFileByPath(file.getRemotePath());
                 file.setFileId(oldFile.getFileId());
+            } else {
+                oldFile = getFileById(file.getFileId());
             }
 
             overriden = true;
@@ -152,7 +201,7 @@ public class FileDataStorageManager implements DataStorageManager {
                         new String[] { String.valueOf(file.getFileId()) });
             } else {
                 try {
-                    getContentProvider().update(ProviderTableMeta.CONTENT_URI,
+                    getContentProviderClient().update(ProviderTableMeta.CONTENT_URI,
                             cv, ProviderTableMeta._ID + "=?",
                             new String[] { String.valueOf(file.getFileId()) });
                 } catch (RemoteException e) {
@@ -168,7 +217,7 @@ public class FileDataStorageManager implements DataStorageManager {
                         ProviderTableMeta.CONTENT_URI_FILE, cv);
             } else {
                 try {
-                    result_uri = getContentProvider().insert(
+                    result_uri = getContentProviderClient().insert(
                             ProviderTableMeta.CONTENT_URI_FILE, cv);
                 } catch (RemoteException e) {
                     Log_OC.e(TAG,
@@ -183,27 +232,34 @@ public class FileDataStorageManager implements DataStorageManager {
             }            
         }
 
-        if (file.isDirectory() && file.needsUpdatingWhileSaving())
-            for (OCFile f : getDirectoryContent(file))
-                saveFile(f);
-        
-        Log_OC.d(TAG, ".........file Time= " + DisplayUtils.unixTimeToHumanReadable(file.getModificationTimestamp()));
-        updateSubtreeSize(file.getParentId());
+        if (file.isFolder()) {
+            updateFolderSize(file.getFileId());
+        } else {
+            updateFolderSize(file.getParentId());
+        }
         
         return overriden;
     }
 
 
-    @Override
-    public void saveFiles(List<OCFile> files) {
+    /**
+     * Inserts or updates the list of files contained in a given folder.
+     * 
+     * CALLER IS THE RESPONSIBLE FOR GRANTING RIGHT UPDATE OF INFORMATION, NOT THIS METHOD.
+     * HERE ONLY DATA CONSISTENCY SHOULD BE GRANTED
+     *  
+     * @param folder
+     * @param files
+     * @param removeNotUpdated
+     */
+    public void saveFolder(OCFile folder, Collection<OCFile> updatedFiles, Collection<OCFile> filesToRemove) {
+        
+        Log_OC.d(TAG,  "Saving folder " + folder.getRemotePath() + " with " + updatedFiles.size() + " children and " + filesToRemove.size() + " files to remove");
 
-        Iterator<OCFile> filesIt = files.iterator();
-        ArrayList<ContentProviderOperation> operations = new ArrayList<ContentProviderOperation>(files.size());
-        OCFile file = null;
+        ArrayList<ContentProviderOperation> operations = new ArrayList<ContentProviderOperation>(updatedFiles.size());
 
-        // prepare operations to perform
-        while (filesIt.hasNext()) {
-            file = filesIt.next();
+        // prepare operations to insert or update files to save in the given folder
+        for (OCFile file : updatedFiles) {
             ContentValues cv = new ContentValues();
             cv.put(ProviderTableMeta.FILE_MODIFIED, file.getModificationTimestamp());
             cv.put(ProviderTableMeta.FILE_MODIFIED_AT_LAST_SYNC_FOR_DATA, file.getModificationTimestampAtLastSyncForData());
@@ -211,32 +267,21 @@ public class FileDataStorageManager implements DataStorageManager {
             cv.put(ProviderTableMeta.FILE_CONTENT_LENGTH, file.getFileLength());
             cv.put(ProviderTableMeta.FILE_CONTENT_TYPE, file.getMimetype());
             cv.put(ProviderTableMeta.FILE_NAME, file.getFileName());
-            if (file.getParentId() != 0)
-                cv.put(ProviderTableMeta.FILE_PARENT, file.getParentId());
+            //cv.put(ProviderTableMeta.FILE_PARENT, file.getParentId());
+            cv.put(ProviderTableMeta.FILE_PARENT, folder.getFileId());
             cv.put(ProviderTableMeta.FILE_PATH, file.getRemotePath());
-            if (!file.isDirectory())
+            if (!file.isFolder()) {
                 cv.put(ProviderTableMeta.FILE_STORAGE_PATH, file.getStoragePath());
+            }
             cv.put(ProviderTableMeta.FILE_ACCOUNT_OWNER, mAccount.name);
             cv.put(ProviderTableMeta.FILE_LAST_SYNC_DATE, file.getLastSyncDateForProperties());
             cv.put(ProviderTableMeta.FILE_LAST_SYNC_DATE_FOR_DATA, file.getLastSyncDateForData());
             cv.put(ProviderTableMeta.FILE_KEEP_IN_SYNC, file.keepInSync() ? 1 : 0);
+            cv.put(ProviderTableMeta.FILE_ETAG, file.getEtag());
 
-            if (fileExists(file.getRemotePath())) {
-                OCFile oldFile = getFileByPath(file.getRemotePath());
-                file.setFileId(oldFile.getFileId());
-                operations.add(ContentProviderOperation.newUpdate(ProviderTableMeta.CONTENT_URI).
-                        withValues(cv).
-                        withSelection(  ProviderTableMeta._ID + "=?", 
-                                new String[] { String.valueOf(file.getFileId()) })
-                                .build());
-
-            } else if (fileExists(file.getFileId())) {
-                OCFile oldFile = getFileById(file.getFileId());
-                if (file.getStoragePath() == null && oldFile.getStoragePath() != null)
-                    file.setStoragePath(oldFile.getStoragePath());
-                if (!file.isDirectory());
-                cv.put(ProviderTableMeta.FILE_STORAGE_PATH, file.getStoragePath());
-
+            boolean existsByPath = fileExists(file.getRemotePath());
+            if (existsByPath || fileExists(file.getFileId())) {
+                // updating an existing file
                 operations.add(ContentProviderOperation.newUpdate(ProviderTableMeta.CONTENT_URI).
                         withValues(cv).
                         withSelection(  ProviderTableMeta._ID + "=?", 
@@ -244,298 +289,239 @@ public class FileDataStorageManager implements DataStorageManager {
                                 .build());
 
             } else {
+                // adding a new file
                 operations.add(ContentProviderOperation.newInsert(ProviderTableMeta.CONTENT_URI).withValues(cv).build());
             }
         }
+        
+        // prepare operations to remove files in the given folder
+        String where = ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?" + " AND " + ProviderTableMeta.FILE_PATH + "=?";
+        String [] whereArgs = null;
+        for (OCFile file : filesToRemove) {
+            if (file.getParentId() == folder.getFileId()) {
+                whereArgs = new String[]{mAccount.name, file.getRemotePath()};
+                //Uri.withAppendedPath(ProviderTableMeta.CONTENT_URI_FILE, "" + file.getFileId());
+                if (file.isFolder()) {
+                    operations.add(ContentProviderOperation
+                                    .newDelete(ContentUris.withAppendedId(ProviderTableMeta.CONTENT_URI_DIR, file.getFileId())).withSelection(where, whereArgs)
+                                        .build());
+                    // TODO remove local folder
+                } else {
+                    operations.add(ContentProviderOperation
+                                    .newDelete(ContentUris.withAppendedId(ProviderTableMeta.CONTENT_URI_FILE, file.getFileId())).withSelection(where, whereArgs)
+                                        .build());
+                    if (file.isDown()) {
+                        new File(file.getStoragePath()).delete();
+                        // TODO move the deletion of local contents after success of deletions
+                    }
+                }
+            }
+        }
+        
+        // update metadata of folder
+        ContentValues cv = new ContentValues();
+        cv.put(ProviderTableMeta.FILE_MODIFIED, folder.getModificationTimestamp());
+        cv.put(ProviderTableMeta.FILE_MODIFIED_AT_LAST_SYNC_FOR_DATA, folder.getModificationTimestampAtLastSyncForData());
+        cv.put(ProviderTableMeta.FILE_CREATION, folder.getCreationTimestamp());
+        cv.put(ProviderTableMeta.FILE_CONTENT_LENGTH, 0);   // FileContentProvider calculates the right size
+        cv.put(ProviderTableMeta.FILE_CONTENT_TYPE, folder.getMimetype());
+        cv.put(ProviderTableMeta.FILE_NAME, folder.getFileName());
+        cv.put(ProviderTableMeta.FILE_PARENT, folder.getParentId());
+        cv.put(ProviderTableMeta.FILE_PATH, folder.getRemotePath());
+        cv.put(ProviderTableMeta.FILE_ACCOUNT_OWNER, mAccount.name);
+        cv.put(ProviderTableMeta.FILE_LAST_SYNC_DATE, folder.getLastSyncDateForProperties());
+        cv.put(ProviderTableMeta.FILE_LAST_SYNC_DATE_FOR_DATA, folder.getLastSyncDateForData());
+        cv.put(ProviderTableMeta.FILE_KEEP_IN_SYNC, folder.keepInSync() ? 1 : 0);
+        cv.put(ProviderTableMeta.FILE_ETAG, folder.getEtag());
+        operations.add(ContentProviderOperation.newUpdate(ProviderTableMeta.CONTENT_URI).
+                withValues(cv).
+                withSelection(  ProviderTableMeta._ID + "=?", 
+                        new String[] { String.valueOf(folder.getFileId()) })
+                        .build());
 
         // apply operations in batch
         ContentProviderResult[] results = null;
+        Log_OC.d(TAG, "Sending " + operations.size() + " operations to FileContentProvider");
         try {
             if (getContentResolver() != null) {
-                results = getContentResolver().applyBatch(ProviderMeta.AUTHORITY_FILES, operations);
+                results = getContentResolver().applyBatch(MainApp.getAuthority(), operations);
 
             } else {
-                results = getContentProvider().applyBatch(operations);
+                results = getContentProviderClient().applyBatch(operations);
             }
 
         } catch (OperationApplicationException e) {
-            Log_OC.e(TAG, "Fail to update/insert list of files to database " + e.getMessage());
+            Log_OC.e(TAG, "Exception in batch of operations " + e.getMessage());
 
         } catch (RemoteException e) {
-            Log_OC.e(TAG, "Fail to update/insert list of files to database " + e.getMessage());
+            Log_OC.e(TAG, "Exception in batch of operations  " + e.getMessage());
         }
 
         // update new id in file objects for insertions
         if (results != null) {
             long newId;
+            Iterator<OCFile> filesIt = updatedFiles.iterator();
+            OCFile file = null;
             for (int i=0; i<results.length; i++) {
+                if (filesIt.hasNext()) {
+                    file = filesIt.next();
+                } else {
+                    file = null;
+                }
                 if (results[i].uri != null) {
                     newId = Long.parseLong(results[i].uri.getPathSegments().get(1));
-                    files.get(i).setFileId(newId);
-                    //Log_OC.v(TAG, "Found and added id in insertion for " + files.get(i).getRemotePath());
+                    //updatedFiles.get(i).setFileId(newId);
+                    if (file != null) {
+                        file.setFileId(newId);
+                    }
                 }
             }
         }
-
-        for (OCFile aFile : files) {
-            if (aFile.isDirectory() && aFile.needsUpdatingWhileSaving())
-                saveFiles(getDirectoryContent(aFile));
-        }
-
-    }
-
-    public void setAccount(Account account) {
-        mAccount = account;
-    }
-
-    public Account getAccount() {
-        return mAccount;
-    }
-
-    public void setContentResolver(ContentResolver cr) {
-        mContentResolver = cr;
-    }
-
-    public ContentResolver getContentResolver() {
-        return mContentResolver;
-    }
-
-    public void setContentProvider(ContentProviderClient cp) {
-        mContentProvider = cp;
-    }
-
-    public ContentProviderClient getContentProvider() {
-        return mContentProvider;
+        
+        updateFolderSize(folder.getFileId());
+        
     }
 
-    @Override
-    public Vector<OCFile> getDirectoryContent(OCFile f) {
-        Vector<OCFile> ret = new Vector<OCFile>();
-        if (f != null && f.isDirectory() && f.getFileId() != -1) {
-
-            Uri req_uri = Uri.withAppendedPath(
-                    ProviderTableMeta.CONTENT_URI_DIR,
-                    String.valueOf(f.getFileId()));
-            Cursor c = null;
 
-            if (getContentProvider() != null) {
+    /**
+     * 
+     * @param id
+     */
+    private void updateFolderSize(long id) {
+        if (id > FileDataStorageManager.ROOT_PARENT_ID) {
+            Log_OC.d(TAG, "Updating size of " + id);
+            if (getContentResolver() != null) {
+                getContentResolver().update(ProviderTableMeta.CONTENT_URI_DIR, 
+                        new ContentValues(),    // won't be used, but cannot be null; crashes in KLP
+                        ProviderTableMeta._ID + "=?",
+                        new String[] { String.valueOf(id) });
+            } else {
                 try {
-                    c = getContentProvider().query(req_uri, null,
-                            ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?",
-                            new String[] { mAccount.name }, null);
+                    getContentProviderClient().update(ProviderTableMeta.CONTENT_URI_DIR, 
+                            new ContentValues(),    // won't be used, but cannot be null; crashes in KLP
+                            ProviderTableMeta._ID + "=?",
+                            new String[] { String.valueOf(id) });
+                    
                 } catch (RemoteException e) {
-                    Log_OC.e(TAG, e.getMessage());
-                    return ret;
+                    Log_OC.e(TAG, "Exception in update of folder size through compatibility patch " + e.getMessage());
                 }
-            } else {
-                c = getContentResolver().query(req_uri, null,
-                        ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?",
-                        new String[] { mAccount.name }, null);
-            }
-
-            if (c.moveToFirst()) {
-                do {
-                    OCFile child = createFileInstance(c);
-                    ret.add(child);
-                } while (c.moveToNext());
             }
-
-            c.close();
-
-            Collections.sort(ret);
-
-        }
-        return ret;
-    }
-
-    private boolean fileExists(String cmp_key, String value) {
-        Cursor c;
-        if (getContentResolver() != null) {
-            c = getContentResolver()
-                    .query(ProviderTableMeta.CONTENT_URI,
-                            null,
-                            cmp_key + "=? AND "
-                                    + ProviderTableMeta.FILE_ACCOUNT_OWNER
-                                    + "=?",
-                                    new String[] { value, mAccount.name }, null);
         } else {
-            try {
-                c = getContentProvider().query(
-                        ProviderTableMeta.CONTENT_URI,
-                        null,
-                        cmp_key + "=? AND "
-                                + ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?",
-                                new String[] { value, mAccount.name }, null);
-            } catch (RemoteException e) {
-                Log_OC.e(TAG,
-                        "Couldn't determine file existance, assuming non existance: "
-                                + e.getMessage());
-                return false;
-            }
+            Log_OC.e(TAG,  "not updating size for folder " + id);
         }
-        boolean retval = c.moveToFirst();
-        c.close();
-        return retval;
     }
+    
 
-    private Cursor getCursorForValue(String key, String value) {
-        Cursor c = null;
-        if (getContentResolver() != null) {
-            c = getContentResolver()
-                    .query(ProviderTableMeta.CONTENT_URI,
-                            null,
-                            key + "=? AND "
-                                    + ProviderTableMeta.FILE_ACCOUNT_OWNER
-                                    + "=?",
-                                    new String[] { value, mAccount.name }, null);
-        } else {
-            try {
-                c = getContentProvider().query(
-                        ProviderTableMeta.CONTENT_URI,
-                        null,
-                        key + "=? AND " + ProviderTableMeta.FILE_ACCOUNT_OWNER
-                        + "=?", new String[] { value, mAccount.name },
-                        null);
-            } catch (RemoteException e) {
-                Log_OC.e(TAG, "Could not get file details: " + e.getMessage());
-                c = null;
+    public void removeFile(OCFile file, boolean removeDBData, boolean removeLocalCopy) {
+        if (file != null) {
+            if (file.isFolder()) {
+                removeFolder(file, removeDBData, removeLocalCopy);
+                
+            } else {
+                if (removeDBData) {
+                    //Uri file_uri = Uri.withAppendedPath(ProviderTableMeta.CONTENT_URI_FILE, ""+file.getFileId());
+                    Uri file_uri = ContentUris.withAppendedId(ProviderTableMeta.CONTENT_URI_FILE, file.getFileId());
+                    String where = ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?" + " AND " + ProviderTableMeta.FILE_PATH + "=?";
+                    String [] whereArgs = new String[]{mAccount.name, file.getRemotePath()};
+                    if (getContentProviderClient() != null) {
+                        try {
+                            getContentProviderClient().delete(file_uri, where, whereArgs);
+                        } catch (RemoteException e) {
+                            e.printStackTrace();
+                        }
+                    } else {
+                        getContentResolver().delete(file_uri, where, whereArgs);
+                    }
+                    updateFolderSize(file.getParentId());
+                }
+                if (removeLocalCopy && file.isDown()) {
+                    boolean success = new File(file.getStoragePath()).delete();
+                    if (!removeDBData && success) {
+                        // maybe unnecessary, but should be checked TODO remove if unnecessary
+                        file.setStoragePath(null);
+                        saveFile(file);
+                    }
+                }
             }
         }
-        return c;
     }
+    
 
-    private OCFile createFileInstance(Cursor c) {
-        OCFile file = null;
-        if (c != null) {
-            file = new OCFile(c.getString(c
-                    .getColumnIndex(ProviderTableMeta.FILE_PATH)));
-            file.setFileId(c.getLong(c.getColumnIndex(ProviderTableMeta._ID)));
-            file.setParentId(c.getLong(c
-                    .getColumnIndex(ProviderTableMeta.FILE_PARENT)));
-            file.setMimetype(c.getString(c
-                    .getColumnIndex(ProviderTableMeta.FILE_CONTENT_TYPE)));
-            if (!file.isDirectory()) {
-                file.setStoragePath(c.getString(c
-                        .getColumnIndex(ProviderTableMeta.FILE_STORAGE_PATH)));
-                if (file.getStoragePath() == null) {
-                    // try to find existing file and bind it with current account; - with the current update of SynchronizeFolderOperation, this won't be necessary anymore after a full synchronization of the account
-                    File f = new File(FileStorageUtils.getDefaultSavePathFor(mAccount.name, file));
-                    if (f.exists()) {
-                        file.setStoragePath(f.getAbsolutePath());
-                        file.setLastSyncDateForData(f.lastModified());
-                    }
-                }
+    public void removeFolder(OCFile folder, boolean removeDBData, boolean removeLocalContent) {
+        if (folder != null && folder.isFolder()) {
+            if (removeDBData &&  folder.getFileId() != -1) {
+                removeFolderInDb(folder);
+            }
+            if (removeLocalContent) {
+                File localFolder = new File(FileStorageUtils.getDefaultSavePathFor(mAccount.name, folder));
+                removeLocalFolder(localFolder);
             }
-            file.setFileLength(c.getLong(c
-                    .getColumnIndex(ProviderTableMeta.FILE_CONTENT_LENGTH)));
-            file.setCreationTimestamp(c.getLong(c
-                    .getColumnIndex(ProviderTableMeta.FILE_CREATION)));
-            file.setModificationTimestamp(c.getLong(c
-                    .getColumnIndex(ProviderTableMeta.FILE_MODIFIED)));
-            file.setModificationTimestampAtLastSyncForData(c.getLong(c
-                    .getColumnIndex(ProviderTableMeta.FILE_MODIFIED_AT_LAST_SYNC_FOR_DATA)));
-            file.setLastSyncDateForProperties(c.getLong(c
-                    .getColumnIndex(ProviderTableMeta.FILE_LAST_SYNC_DATE)));
-            file.setLastSyncDateForData(c.getLong(c.
-                    getColumnIndex(ProviderTableMeta.FILE_LAST_SYNC_DATE_FOR_DATA)));
-            file.setKeepInSync(c.getInt(
-                    c.getColumnIndex(ProviderTableMeta.FILE_KEEP_IN_SYNC)) == 1 ? true : false);
         }
-        return file;
     }
 
-    @Override
-    public void removeFile(OCFile file, boolean removeLocalCopy) {
-        Uri file_uri = Uri.withAppendedPath(ProviderTableMeta.CONTENT_URI_FILE, ""+file.getFileId());
-        if (getContentProvider() != null) {
+    private void removeFolderInDb(OCFile folder) {
+        Uri folder_uri = Uri.withAppendedPath(ProviderTableMeta.CONTENT_URI_DIR, ""+ folder.getFileId());   // URI for recursive deletion
+        String where = ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?" + " AND " + ProviderTableMeta.FILE_PATH + "=?";
+        String [] whereArgs = new String[]{mAccount.name, folder.getRemotePath()};
+        if (getContentProviderClient() != null) {
             try {
-                getContentProvider().delete(file_uri,
-                        ProviderTableMeta.FILE_ACCOUNT_OWNER+"=?",
-                        new String[]{mAccount.name});
+                getContentProviderClient().delete(folder_uri, where, whereArgs);
             } catch (RemoteException e) {
                 e.printStackTrace();
             }
         } else {
-            getContentResolver().delete(file_uri,
-                    ProviderTableMeta.FILE_ACCOUNT_OWNER+"=?",
-                    new String[]{mAccount.name});
-        }
-        if (file.isDown() && removeLocalCopy) {
-            new File(file.getStoragePath()).delete();
-        }
-        if (file.isDirectory() && removeLocalCopy) {
-            File f = new File(FileStorageUtils.getDefaultSavePathFor(mAccount.name, file));
-            if (f.exists() && f.isDirectory() && (f.list() == null || f.list().length == 0)) {
-                f.delete();
-            }
+            getContentResolver().delete(folder_uri, where, whereArgs); 
         }
-        
-        updateSubtreeSize(file.getParentId());
+        updateFolderSize(folder.getParentId());
     }
 
-    @Override
-    public void removeDirectory(OCFile dir, boolean removeDBData, boolean removeLocalContent) {
-        // TODO consider possible failures
-        if (dir != null && dir.isDirectory() && dir.getFileId() != -1) {
-            Vector<OCFile> children = getDirectoryContent(dir);
-            if (children.size() > 0) {
-                OCFile child = null;
-                for (int i=0; i<children.size(); i++) {
-                    child = children.get(i);
-                    if (child.isDirectory()) {
-                        removeDirectory(child, removeDBData, removeLocalContent);
+    private void removeLocalFolder(File folder) {
+        if (folder.exists()) {
+            File[] files = folder.listFiles();
+            if (files != null) {
+                for (File file : files) {
+                    if (file.isDirectory()) {
+                        removeLocalFolder(file);
                     } else {
-                        if (removeDBData) {
-                            removeFile(child, removeLocalContent);
-                        } else if (removeLocalContent) {
-                            if (child.isDown()) {
-                                new File(child.getStoragePath()).delete();
-                            }
-                        }
+                        file.delete();
                     }
                 }
             }
-            if (removeDBData) {
-                removeFile(dir, true);
-            }
-            
-            updateSubtreeSize(dir.getParentId());
+            folder.delete();
         }
     }
 
-
     /**
      * Updates database for a folder that was moved to a different location.
      * 
      * TODO explore better (faster) implementations
      * TODO throw exceptions up !
      */
-    @Override
-    public void moveDirectory(OCFile dir, String newPath) {
+    public void moveFolder(OCFile folder, String newPath) {
         // TODO check newPath
 
-        if (dir != null && dir.isDirectory() && dir.fileExists() && !dir.getFileName().equals(OCFile.PATH_SEPARATOR)) {
+        if (folder != null && folder.isFolder() && folder.fileExists() && !OCFile.ROOT_PATH.equals(folder.getFileName())) {
             /// 1. get all the descendants of 'dir' in a single QUERY (including 'dir')
             Cursor c = null;
-            if (getContentProvider() != null) {
+            if (getContentProviderClient() != null) {
                 try {
-                    c = getContentProvider().query(ProviderTableMeta.CONTENT_URI, 
+                    c = getContentProviderClient().query(ProviderTableMeta.CONTENT_URI, 
                             null,
-                            ProviderTableMeta.FILE_ACCOUNT_OWNER + "=? AND " + ProviderTableMeta.FILE_PATH + " LIKE ?",
-                            new String[] { mAccount.name, dir.getRemotePath() + "%" }, null);
+                            ProviderTableMeta.FILE_ACCOUNT_OWNER + "=? AND " + ProviderTableMeta.FILE_PATH + " LIKE ? ",
+                            new String[] { mAccount.name, folder.getRemotePath() + "%"  }, ProviderTableMeta.FILE_PATH + " ASC ");
                 } catch (RemoteException e) {
                     Log_OC.e(TAG, e.getMessage());
                 }
             } else {
                 c = getContentResolver().query(ProviderTableMeta.CONTENT_URI, 
                         null,
-                        ProviderTableMeta.FILE_ACCOUNT_OWNER + "=? AND " + ProviderTableMeta.FILE_PATH + " LIKE ?",
-                        new String[] { mAccount.name, dir.getRemotePath() + "%" }, null);
+                        ProviderTableMeta.FILE_ACCOUNT_OWNER + "=? AND " + ProviderTableMeta.FILE_PATH + " LIKE ? ",
+                        new String[] { mAccount.name, folder.getRemotePath() + "%"  }, ProviderTableMeta.FILE_PATH + " ASC ");
             }
 
             /// 2. prepare a batch of update operations to change all the descendants
             ArrayList<ContentProviderOperation> operations = new ArrayList<ContentProviderOperation>(c.getCount());
-            int lengthOfOldPath = dir.getRemotePath().length();
+            int lengthOfOldPath = folder.getRemotePath().length();
             String defaultSavePath = FileStorageUtils.getSavePath(mAccount.name);
             int lengthOfOldStoragePath = defaultSavePath.length() + lengthOfOldPath;
             if (c.moveToFirst()) {
@@ -558,41 +544,24 @@ public class FileDataStorageManager implements DataStorageManager {
             /// 3. apply updates in batch
             try {
                 if (getContentResolver() != null) {
-                    getContentResolver().applyBatch(ProviderMeta.AUTHORITY_FILES, operations);
+                    getContentResolver().applyBatch(MainApp.getAuthority(), operations);
 
                 } else {
-                    getContentProvider().applyBatch(operations);
+                    getContentProviderClient().applyBatch(operations);
                 }
 
             } catch (OperationApplicationException e) {
-                Log_OC.e(TAG, "Fail to update descendants of " + dir.getFileId() + " in database", e);
+                Log_OC.e(TAG, "Fail to update descendants of " + folder.getFileId() + " in database", e);
 
             } catch (RemoteException e) {
-                Log_OC.e(TAG, "Fail to update desendants of " + dir.getFileId() + " in database", e);
+                Log_OC.e(TAG, "Fail to update desendants of " + folder.getFileId() + " in database", e);
             }
 
         }
     }
 
-    @Override
-    public Vector<OCFile> getDirectoryImages(OCFile directory) {
-        Vector<OCFile> ret = new Vector<OCFile>(); 
-        if (directory != null) {
-            // TODO better implementation, filtering in the access to database (if possible) instead of here 
-            Vector<OCFile> tmp = getDirectoryContent(directory);
-            OCFile current = null; 
-            for (int i=0; i<tmp.size(); i++) {
-                current = tmp.get(i);
-                if (current.isImage()) {
-                    ret.add(current);
-                }
-            }
-        }
-        return ret;
-    }
-
-    @Override
-    public Vector<OCFile> getFilesbyParent(long parentId) {
+    
+    private Vector<OCFile> getFolderContent(long parentId) {
 
         Vector<OCFile> ret = new Vector<OCFile>();
 
@@ -601,9 +570,9 @@ public class FileDataStorageManager implements DataStorageManager {
                 String.valueOf(parentId));
         Cursor c = null;
 
-        if (getContentProvider() != null) {
+        if (getContentProviderClient() != null) {
             try {
-                c = getContentProvider().query(req_uri, null, 
+                c = getContentProviderClient().query(req_uri, null, 
                         ProviderTableMeta.FILE_PARENT + "=?" ,
                         new String[] { String.valueOf(parentId)}, null);
             } catch (RemoteException e) {
@@ -630,59 +599,111 @@ public class FileDataStorageManager implements DataStorageManager {
         return ret;
     }
     
-    /**
-     * Calculate and save the folderSize on DB
-     * @param id
-     */
-    @Override
-    public void saveFolderSize(long id) {
-        long folderSize = 0;
-        
-        Vector<OCFile> files = getFilesbyParent(id);
-        
-        Log_OC.d(TAG, "Folder " + String.valueOf(id) + "--- Number of Files = " + String.valueOf(files.size()));
-        
-        for (OCFile f: files)
-        {
-            folderSize = folderSize + f.getFileLength();
-            Log_OC.d(TAG, "Folder Size = " + String.valueOf(folderSize));
+    
+    private OCFile createRootDir() {
+        OCFile file = new OCFile(OCFile.ROOT_PATH);
+        file.setMimetype("DIR");
+        file.setParentId(FileDataStorageManager.ROOT_PARENT_ID);
+        saveFile(file);
+        return file;
+    }
+
+    private boolean fileExists(String cmp_key, String value) {
+        Cursor c;
+        if (getContentResolver() != null) {
+            c = getContentResolver()
+                    .query(ProviderTableMeta.CONTENT_URI,
+                            null,
+                            cmp_key + "=? AND "
+                                    + ProviderTableMeta.FILE_ACCOUNT_OWNER
+                                    + "=?",
+                                    new String[] { value, mAccount.name }, null);
+        } else {
+            try {
+                c = getContentProviderClient().query(
+                        ProviderTableMeta.CONTENT_URI,
+                        null,
+                        cmp_key + "=? AND "
+                                + ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?",
+                                new String[] { value, mAccount.name }, null);
+            } catch (RemoteException e) {
+                Log_OC.e(TAG,
+                        "Couldn't determine file existance, assuming non existance: "
+                                + e.getMessage());
+                return false;
+            }
         }
-        
-        updatefolderSize(id, folderSize);
+        boolean retval = c.moveToFirst();
+        c.close();
+        return retval;
     }
 
-    /**
-     * Update the size value of a folder on DB
-     */
-    @Override
-    public int updatefolderSize(long id, long size) {
-        ContentValues cv = new ContentValues();
-        cv.put(ProviderTableMeta.FILE_CONTENT_LENGTH, size);
-        int result = getContentResolver().update(ProviderTableMeta.CONTENT_URI, cv, ProviderTableMeta._ID + "=?", 
-                new String[] { String.valueOf(id) });
-        return result;
+    private Cursor getCursorForValue(String key, String value) {
+        Cursor c = null;
+        if (getContentResolver() != null) {
+            c = getContentResolver()
+                    .query(ProviderTableMeta.CONTENT_URI,
+                            null,
+                            key + "=? AND "
+                                    + ProviderTableMeta.FILE_ACCOUNT_OWNER
+                                    + "=?",
+                                    new String[] { value, mAccount.name }, null);
+        } else {
+            try {
+                c = getContentProviderClient().query(
+                        ProviderTableMeta.CONTENT_URI,
+                        null,
+                        key + "=? AND " + ProviderTableMeta.FILE_ACCOUNT_OWNER
+                        + "=?", new String[] { value, mAccount.name },
+                        null);
+            } catch (RemoteException e) {
+                Log_OC.e(TAG, "Could not get file details: " + e.getMessage());
+                c = null;
+            }
+        }
+        return c;
     }
 
-    /** 
-     * Update the size of a subtree of folder from a file to the root
-     * @param parentId: parent of the file
-     */
-    private void updateSubtreeSize(long parentId) {
-        
-        OCFile file; 
-
-        while (parentId != 0) {
-            
-            Log_OC.d(TAG, "parent = " + parentId);
-            // Update the size of the parent
-            saveFolderSize(parentId);
-            
-            // search the next parent
-            file = getFileById(parentId);            
-            parentId = file.getParentId();
-            
-        }              
-        
+    private OCFile createFileInstance(Cursor c) {
+        OCFile file = null;
+        if (c != null) {
+            file = new OCFile(c.getString(c
+                    .getColumnIndex(ProviderTableMeta.FILE_PATH)));
+            file.setFileId(c.getLong(c.getColumnIndex(ProviderTableMeta._ID)));
+            file.setParentId(c.getLong(c
+                    .getColumnIndex(ProviderTableMeta.FILE_PARENT)));
+            file.setMimetype(c.getString(c
+                    .getColumnIndex(ProviderTableMeta.FILE_CONTENT_TYPE)));
+            if (!file.isFolder()) {
+                file.setStoragePath(c.getString(c
+                        .getColumnIndex(ProviderTableMeta.FILE_STORAGE_PATH)));
+                if (file.getStoragePath() == null) {
+                    // try to find existing file and bind it with current account; - with the current update of SynchronizeFolderOperation, this won't be necessary anymore after a full synchronization of the account
+                    File f = new File(FileStorageUtils.getDefaultSavePathFor(mAccount.name, file));
+                    if (f.exists()) {
+                        file.setStoragePath(f.getAbsolutePath());
+                        file.setLastSyncDateForData(f.lastModified());
+                    }
+                }
+            }
+            file.setFileLength(c.getLong(c
+                    .getColumnIndex(ProviderTableMeta.FILE_CONTENT_LENGTH)));
+            file.setCreationTimestamp(c.getLong(c
+                    .getColumnIndex(ProviderTableMeta.FILE_CREATION)));
+            file.setModificationTimestamp(c.getLong(c
+                    .getColumnIndex(ProviderTableMeta.FILE_MODIFIED)));
+            file.setModificationTimestampAtLastSyncForData(c.getLong(c
+                    .getColumnIndex(ProviderTableMeta.FILE_MODIFIED_AT_LAST_SYNC_FOR_DATA)));
+            file.setLastSyncDateForProperties(c.getLong(c
+                    .getColumnIndex(ProviderTableMeta.FILE_LAST_SYNC_DATE)));
+            file.setLastSyncDateForData(c.getLong(c.
+                    getColumnIndex(ProviderTableMeta.FILE_LAST_SYNC_DATE_FOR_DATA)));
+            file.setKeepInSync(c.getInt(
+                    c.getColumnIndex(ProviderTableMeta.FILE_KEEP_IN_SYNC)) == 1 ? true : false);
+            file.setEtag(c.getString(c.getColumnIndex(ProviderTableMeta.FILE_ETAG)));
+                    
+        }
+        return file;
     }
-    
+
 }