OC-577: Modify FileDataStorageManager to call updateSubtreeSize. OC-523

[pub/Android/ownCloud.git] / 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 987e291..69f36ea 100644 (file)
--- a/src/com/owncloud/android/datamodel/FileDataStorageManager.java
+++ b/src/com/owncloud/android/datamodel/FileDataStorageManager.java
@@ -1,10 +1,10 @@
 /* ownCloud Android client application
  *   Copyright (C) 2012  Bartek Przybylski
 /* ownCloud Android client application
  *   Copyright (C) 2012  Bartek Przybylski

+ *   Copyright (C) 2012-2013 ownCloud Inc.

  *
  *   This program is free software: you can redistribute it and/or modify
  *
  *   This program is free software: you can redistribute it and/or modify

- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation, either version 3 of the License, or
- *   (at your option) any later version.
+ *   it under the terms of the GNU General Public License version 2,
+ *   as published by the Free Software Foundation.

  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of


@@ -25,6 +25,8 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Vector;
 
 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.db.ProviderMeta.ProviderTableMeta;
 import com.owncloud.android.utils.FileStorageUtils;
 import com.owncloud.android.db.ProviderMeta;
 import com.owncloud.android.db.ProviderMeta.ProviderTableMeta;
 import com.owncloud.android.utils.FileStorageUtils;


@@ -39,16 +41,15 @@ import android.content.OperationApplicationException;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.RemoteException;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.RemoteException;

-import android.util.Log;

 
 public class FileDataStorageManager implements DataStorageManager {
 
     private ContentResolver mContentResolver;
     private ContentProviderClient mContentProvider;
     private Account mAccount;
 
 public class FileDataStorageManager implements DataStorageManager {
 
     private ContentResolver mContentResolver;
     private ContentProviderClient mContentProvider;
     private Account mAccount;

-    
+

     private static String TAG = "FileDataStorageManager";
     private static String TAG = "FileDataStorageManager";

-    
+

     public FileDataStorageManager(Account account, ContentResolver cr) {
         mContentProvider = null;
         mContentResolver = cr;
     public FileDataStorageManager(Account account, ContentResolver cr) {
         mContentProvider = null;
         mContentResolver = cr;


@@ -75,7 +76,7 @@ public class FileDataStorageManager implements DataStorageManager {
         return file;
     }
 
         return file;
     }
 

-    
+

     private OCFile createRootDir() {
         OCFile file = new OCFile(OCFile.PATH_SEPARATOR);
         file.setMimetype("DIR");
     private OCFile createRootDir() {
         OCFile file = new OCFile(OCFile.PATH_SEPARATOR);
         file.setMimetype("DIR");


@@ -94,7 +95,7 @@ public class FileDataStorageManager implements DataStorageManager {
         c.close();
         return file;
     }
         c.close();
         return file;
     }

-    
+

     public OCFile getFileByLocalPath(String path) {
         Cursor c = getCursorForValue(ProviderTableMeta.FILE_STORAGE_PATH, path);
         OCFile file = null;
     public OCFile getFileByLocalPath(String path) {
         Cursor c = getCursorForValue(ProviderTableMeta.FILE_STORAGE_PATH, path);
         OCFile file = null;


@@ -137,8 +138,8 @@ public class FileDataStorageManager implements DataStorageManager {
 
         boolean sameRemotePath = fileExists(file.getRemotePath());
         if (sameRemotePath ||
 
         boolean sameRemotePath = fileExists(file.getRemotePath());
         if (sameRemotePath ||

-            fileExists(file.getFileId())        ) {           // for renamed files; no more delete and create
-            
+                fileExists(file.getFileId())        ) {           // for renamed files; no more delete and create
+

             if (sameRemotePath) {
                 OCFile oldFile = getFileByPath(file.getRemotePath());
                 file.setFileId(oldFile.getFileId());
             if (sameRemotePath) {
                 OCFile oldFile = getFileByPath(file.getRemotePath());
                 file.setFileId(oldFile.getFileId());


@@ -155,7 +156,7 @@ public class FileDataStorageManager implements DataStorageManager {
                             cv, ProviderTableMeta._ID + "=?",
                             new String[] { String.valueOf(file.getFileId()) });
                 } catch (RemoteException e) {
                             cv, ProviderTableMeta._ID + "=?",
                             new String[] { String.valueOf(file.getFileId()) });
                 } catch (RemoteException e) {

-                    Log.e(TAG,
+                    Log_OC.e(TAG,

                             "Fail to insert insert file to database "
                                     + e.getMessage());
                 }
                             "Fail to insert insert file to database "
                                     + e.getMessage());
                 }


@@ -170,7 +171,7 @@ public class FileDataStorageManager implements DataStorageManager {
                     result_uri = getContentProvider().insert(
                             ProviderTableMeta.CONTENT_URI_FILE, cv);
                 } catch (RemoteException e) {
                     result_uri = getContentProvider().insert(
                             ProviderTableMeta.CONTENT_URI_FILE, cv);
                 } catch (RemoteException e) {

-                    Log.e(TAG,
+                    Log_OC.e(TAG,

                             "Fail to insert insert file to database "
                                     + e.getMessage());
                 }
                             "Fail to insert insert file to database "
                                     + e.getMessage());
                 }


@@ -179,20 +180,23 @@ public class FileDataStorageManager implements DataStorageManager {
                 long new_id = Long.parseLong(result_uri.getPathSegments()
                         .get(1));
                 file.setFileId(new_id);
                 long new_id = Long.parseLong(result_uri.getPathSegments()
                         .get(1));
                 file.setFileId(new_id);

-            }
+            }            

         }
 
         if (file.isDirectory() && file.needsUpdatingWhileSaving())
             for (OCFile f : getDirectoryContent(file))
                 saveFile(f);
         }
 
         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());
+        

         return overriden;
     }
 
 
     @Override
     public void saveFiles(List<OCFile> files) {
         return overriden;
     }
 
 
     @Override
     public void saveFiles(List<OCFile> files) {

-        
+

         Iterator<OCFile> filesIt = files.iterator();
         ArrayList<ContentProviderOperation> operations = new ArrayList<ContentProviderOperation>(files.size());
         OCFile file = null;
         Iterator<OCFile> filesIt = files.iterator();
         ArrayList<ContentProviderOperation> operations = new ArrayList<ContentProviderOperation>(files.size());
         OCFile file = null;


@@ -223,44 +227,44 @@ public class FileDataStorageManager implements DataStorageManager {
                 operations.add(ContentProviderOperation.newUpdate(ProviderTableMeta.CONTENT_URI).
                         withValues(cv).
                         withSelection(  ProviderTableMeta._ID + "=?", 
                 operations.add(ContentProviderOperation.newUpdate(ProviderTableMeta.CONTENT_URI).
                         withValues(cv).
                         withSelection(  ProviderTableMeta._ID + "=?", 

-                                        new String[] { String.valueOf(file.getFileId()) })
-                        .build());
-                
+                                new String[] { String.valueOf(file.getFileId()) })
+                                .build());
+

             } else if (fileExists(file.getFileId())) {
             } 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());
+                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());
+
+                operations.add(ContentProviderOperation.newUpdate(ProviderTableMeta.CONTENT_URI).
+                        withValues(cv).
+                        withSelection(  ProviderTableMeta._ID + "=?", 
+                                new String[] { String.valueOf(file.getFileId()) })
+                                .build());

 
 

-                    operations.add(ContentProviderOperation.newUpdate(ProviderTableMeta.CONTENT_URI).
-                            withValues(cv).
-                            withSelection(  ProviderTableMeta._ID + "=?", 
-                                            new String[] { String.valueOf(file.getFileId()) })
-                            .build());
-                    

             } else {
                 operations.add(ContentProviderOperation.newInsert(ProviderTableMeta.CONTENT_URI).withValues(cv).build());
             }
         }
             } else {
                 operations.add(ContentProviderOperation.newInsert(ProviderTableMeta.CONTENT_URI).withValues(cv).build());
             }
         }

-        
+

         // apply operations in batch
         ContentProviderResult[] results = null;
         try {
             if (getContentResolver() != null) {
                 results = getContentResolver().applyBatch(ProviderMeta.AUTHORITY_FILES, operations);
         // apply operations in batch
         ContentProviderResult[] results = null;
         try {
             if (getContentResolver() != null) {
                 results = getContentResolver().applyBatch(ProviderMeta.AUTHORITY_FILES, operations);

-            
+

             } else {
                 results = getContentProvider().applyBatch(operations);
             }
             } else {
                 results = getContentProvider().applyBatch(operations);
             }

-            
+

         } catch (OperationApplicationException e) {
         } catch (OperationApplicationException e) {

-            Log.e(TAG, "Fail to update/insert list of files to database " + e.getMessage());
-            
+            Log_OC.e(TAG, "Fail to update/insert list of files to database " + e.getMessage());
+

         } catch (RemoteException e) {
         } catch (RemoteException e) {

-            Log.e(TAG, "Fail to update/insert list of files to database " + e.getMessage());
+            Log_OC.e(TAG, "Fail to update/insert list of files to database " + e.getMessage());

         }
         }

-        
+

         // update new id in file objects for insertions
         if (results != null) {
             long newId;
         // update new id in file objects for insertions
         if (results != null) {
             long newId;


@@ -268,7 +272,7 @@ public class FileDataStorageManager implements DataStorageManager {
                 if (results[i].uri != null) {
                     newId = Long.parseLong(results[i].uri.getPathSegments().get(1));
                     files.get(i).setFileId(newId);
                 if (results[i].uri != null) {
                     newId = Long.parseLong(results[i].uri.getPathSegments().get(1));
                     files.get(i).setFileId(newId);

-                    //Log.v(TAG, "Found and added id in insertion for " + files.get(i).getRemotePath());
+                    //Log_OC.v(TAG, "Found and added id in insertion for " + files.get(i).getRemotePath());

                 }
             }
         }
                 }
             }
         }


@@ -279,7 +283,7 @@ public class FileDataStorageManager implements DataStorageManager {
         }
 
     }
         }
 
     }

-    
+

     public void setAccount(Account account) {
         mAccount = account;
     }
     public void setAccount(Account account) {
         mAccount = account;
     }


@@ -320,7 +324,7 @@ public class FileDataStorageManager implements DataStorageManager {
                             ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?",
                             new String[] { mAccount.name }, null);
                 } catch (RemoteException e) {
                             ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?",
                             new String[] { mAccount.name }, null);
                 } catch (RemoteException e) {

-                    Log.e(TAG, e.getMessage());
+                    Log_OC.e(TAG, e.getMessage());

                     return ret;
                 }
             } else {
                     return ret;
                 }
             } else {


@@ -337,9 +341,9 @@ public class FileDataStorageManager implements DataStorageManager {
             }
 
             c.close();
             }
 
             c.close();

-            
+

             Collections.sort(ret);
             Collections.sort(ret);

-            
+

         }
         return ret;
     }
         }
         return ret;
     }


@@ -353,7 +357,7 @@ public class FileDataStorageManager implements DataStorageManager {
                             cmp_key + "=? AND "
                                     + ProviderTableMeta.FILE_ACCOUNT_OWNER
                                     + "=?",
                             cmp_key + "=? AND "
                                     + ProviderTableMeta.FILE_ACCOUNT_OWNER
                                     + "=?",

-                            new String[] { value, mAccount.name }, null);
+                                    new String[] { value, mAccount.name }, null);

         } else {
             try {
                 c = getContentProvider().query(
         } else {
             try {
                 c = getContentProvider().query(


@@ -361,9 +365,9 @@ public class FileDataStorageManager implements DataStorageManager {
                         null,
                         cmp_key + "=? AND "
                                 + ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?",
                         null,
                         cmp_key + "=? AND "
                                 + ProviderTableMeta.FILE_ACCOUNT_OWNER + "=?",

-                        new String[] { value, mAccount.name }, null);
+                                new String[] { value, mAccount.name }, null);

             } catch (RemoteException e) {
             } catch (RemoteException e) {

-                Log.e(TAG,
+                Log_OC.e(TAG,

                         "Couldn't determine file existance, assuming non existance: "
                                 + e.getMessage());
                 return false;
                         "Couldn't determine file existance, assuming non existance: "
                                 + e.getMessage());
                 return false;


@@ -383,17 +387,17 @@ public class FileDataStorageManager implements DataStorageManager {
                             key + "=? AND "
                                     + ProviderTableMeta.FILE_ACCOUNT_OWNER
                                     + "=?",
                             key + "=? AND "
                                     + ProviderTableMeta.FILE_ACCOUNT_OWNER
                                     + "=?",

-                            new String[] { value, mAccount.name }, null);
+                                    new String[] { value, mAccount.name }, null);

         } else {
             try {
                 c = getContentProvider().query(
                         ProviderTableMeta.CONTENT_URI,
                         null,
                         key + "=? AND " + ProviderTableMeta.FILE_ACCOUNT_OWNER
         } else {
             try {
                 c = getContentProvider().query(
                         ProviderTableMeta.CONTENT_URI,
                         null,
                         key + "=? AND " + ProviderTableMeta.FILE_ACCOUNT_OWNER

-                                + "=?", new String[] { value, mAccount.name },
+                        + "=?", new String[] { value, mAccount.name },

                         null);
             } catch (RemoteException e) {
                         null);
             } catch (RemoteException e) {

-                Log.e(TAG, "Could not get file details: " + e.getMessage());
+                Log_OC.e(TAG, "Could not get file details: " + e.getMessage());

                 c = null;
             }
         }
                 c = null;
             }
         }


@@ -435,26 +439,26 @@ public class FileDataStorageManager implements DataStorageManager {
             file.setLastSyncDateForData(c.getLong(c.
                     getColumnIndex(ProviderTableMeta.FILE_LAST_SYNC_DATE_FOR_DATA)));
             file.setKeepInSync(c.getInt(
             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);
+                    c.getColumnIndex(ProviderTableMeta.FILE_KEEP_IN_SYNC)) == 1 ? true : false);

         }
         return file;
     }
         }
         return file;
     }

-    
+

     @Override
     public void removeFile(OCFile file, boolean removeLocalCopy) {
         Uri file_uri = Uri.withAppendedPath(ProviderTableMeta.CONTENT_URI_FILE, ""+file.getFileId());
         if (getContentProvider() != null) {
             try {
                 getContentProvider().delete(file_uri,
     @Override
     public void removeFile(OCFile file, boolean removeLocalCopy) {
         Uri file_uri = Uri.withAppendedPath(ProviderTableMeta.CONTENT_URI_FILE, ""+file.getFileId());
         if (getContentProvider() != null) {
             try {
                 getContentProvider().delete(file_uri,

-                                            ProviderTableMeta.FILE_ACCOUNT_OWNER+"=?",
-                                            new String[]{mAccount.name});
+                        ProviderTableMeta.FILE_ACCOUNT_OWNER+"=?",
+                        new String[]{mAccount.name});

             } catch (RemoteException e) {
                 e.printStackTrace();
             }
         } else {
             getContentResolver().delete(file_uri,
             } catch (RemoteException e) {
                 e.printStackTrace();
             }
         } else {
             getContentResolver().delete(file_uri,

-                                        ProviderTableMeta.FILE_ACCOUNT_OWNER+"=?",
-                                        new String[]{mAccount.name});
+                    ProviderTableMeta.FILE_ACCOUNT_OWNER+"=?",
+                    new String[]{mAccount.name});

         }
         if (file.isDown() && removeLocalCopy) {
             new File(file.getStoragePath()).delete();
         }
         if (file.isDown() && removeLocalCopy) {
             new File(file.getStoragePath()).delete();


@@ -465,6 +469,8 @@ public class FileDataStorageManager implements DataStorageManager {
                 f.delete();
             }
         }
                 f.delete();
             }
         }

+        
+        updateSubtreeSize(file.getParentId());

     }
 
     @Override
     }
 
     @Override


@@ -492,10 +498,12 @@ public class FileDataStorageManager implements DataStorageManager {
             if (removeDBData) {
                 removeFile(dir, true);
             }
             if (removeDBData) {
                 removeFile(dir, true);
             }

+            
+            updateSubtreeSize(dir.getParentId());

         }
     }
         }
     }

-    
-    
+
+

     /**
      * Updates database for a folder that was moved to a different location.
      * 
     /**
      * Updates database for a folder that was moved to a different location.
      * 


@@ -505,24 +513,24 @@ public class FileDataStorageManager implements DataStorageManager {
     @Override
     public void moveDirectory(OCFile dir, String newPath) {
         // TODO check newPath
     @Override
     public void moveDirectory(OCFile dir, String newPath) {
         // TODO check newPath

-        
+

         if (dir != null && dir.isDirectory() && dir.fileExists() && !dir.getFileName().equals(OCFile.PATH_SEPARATOR)) {
             /// 1. get all the descendants of 'dir' in a single QUERY (including 'dir')
             Cursor c = null;
             if (getContentProvider() != null) {
                 try {
                     c = getContentProvider().query(ProviderTableMeta.CONTENT_URI, 
         if (dir != null && dir.isDirectory() && dir.fileExists() && !dir.getFileName().equals(OCFile.PATH_SEPARATOR)) {
             /// 1. get all the descendants of 'dir' in a single QUERY (including 'dir')
             Cursor c = null;
             if (getContentProvider() != null) {
                 try {
                     c = getContentProvider().query(ProviderTableMeta.CONTENT_URI, 

-                                                    null,
-                                                    ProviderTableMeta.FILE_ACCOUNT_OWNER + "=? AND " + ProviderTableMeta.FILE_PATH + " LIKE ?",
-                                                    new String[] { mAccount.name, dir.getRemotePath() + "%" }, null);
+                            null,
+                            ProviderTableMeta.FILE_ACCOUNT_OWNER + "=? AND " + ProviderTableMeta.FILE_PATH + " LIKE ?",
+                            new String[] { mAccount.name, dir.getRemotePath() + "%" }, null);

                 } catch (RemoteException e) {
                 } catch (RemoteException e) {

-                    Log.e(TAG, e.getMessage());
+                    Log_OC.e(TAG, e.getMessage());

                 }
             } else {
                 c = getContentResolver().query(ProviderTableMeta.CONTENT_URI, 
                 }
             } else {
                 c = getContentResolver().query(ProviderTableMeta.CONTENT_URI, 

-                                                null,
-                                                ProviderTableMeta.FILE_ACCOUNT_OWNER + "=? AND " + ProviderTableMeta.FILE_PATH + " LIKE ?",
-                                                new String[] { mAccount.name, dir.getRemotePath() + "%" }, null);
+                        null,
+                        ProviderTableMeta.FILE_ACCOUNT_OWNER + "=? AND " + ProviderTableMeta.FILE_PATH + " LIKE ?",
+                        new String[] { mAccount.name, dir.getRemotePath() + "%" }, null);

             }
 
             /// 2. prepare a batch of update operations to change all the descendants
             }
 
             /// 2. prepare a batch of update operations to change all the descendants


@@ -539,31 +547,142 @@ public class FileDataStorageManager implements DataStorageManager {
                         cv.put(ProviderTableMeta.FILE_STORAGE_PATH, defaultSavePath + newPath + child.getStoragePath().substring(lengthOfOldStoragePath));
                     }
                     operations.add(ContentProviderOperation.newUpdate(ProviderTableMeta.CONTENT_URI).
                         cv.put(ProviderTableMeta.FILE_STORAGE_PATH, defaultSavePath + newPath + child.getStoragePath().substring(lengthOfOldStoragePath));
                     }
                     operations.add(ContentProviderOperation.newUpdate(ProviderTableMeta.CONTENT_URI).

-                                                                        withValues(cv).
-                                                                        withSelection(  ProviderTableMeta._ID + "=?", 
-                                                                                new String[] { String.valueOf(child.getFileId()) })
-                                                                                .build());
+                            withValues(cv).
+                            withSelection(  ProviderTableMeta._ID + "=?", 
+                                    new String[] { String.valueOf(child.getFileId()) })
+                                    .build());

                 } while (c.moveToNext());
             }
             c.close();
                 } while (c.moveToNext());
             }
             c.close();

-            
+

             /// 3. apply updates in batch
             try {
                 if (getContentResolver() != null) {
                     getContentResolver().applyBatch(ProviderMeta.AUTHORITY_FILES, operations);
             /// 3. apply updates in batch
             try {
                 if (getContentResolver() != null) {
                     getContentResolver().applyBatch(ProviderMeta.AUTHORITY_FILES, operations);

-                
+

                 } else {
                     getContentProvider().applyBatch(operations);
                 }
                 } else {
                     getContentProvider().applyBatch(operations);
                 }

-                
+

             } catch (OperationApplicationException e) {
             } catch (OperationApplicationException e) {

-                Log.e(TAG, "Fail to update descendants of " + dir.getFileId() + " in database", e);
-                
+                Log_OC.e(TAG, "Fail to update descendants of " + dir.getFileId() + " in database", e);
+

             } catch (RemoteException e) {
             } catch (RemoteException e) {

-                Log.e(TAG, "Fail to update desendants of " + dir.getFileId() + " in database", e);
+                Log_OC.e(TAG, "Fail to update desendants of " + dir.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) {
+
+        Vector<OCFile> ret = new Vector<OCFile>();
+
+        Uri req_uri = Uri.withAppendedPath(
+                ProviderTableMeta.CONTENT_URI_DIR,
+                String.valueOf(parentId));
+        Cursor c = null;
+
+        if (getContentProvider() != null) {
+            try {
+                c = getContentProvider().query(req_uri, null, 
+                        ProviderTableMeta.FILE_PARENT + "=?" ,
+                        new String[] { String.valueOf(parentId)}, null);
+            } catch (RemoteException e) {
+                Log_OC.e(TAG, e.getMessage());
+                return ret;
+            }
+        } else {
+            c = getContentResolver().query(req_uri, null, 
+                    ProviderTableMeta.FILE_PARENT + "=?" ,
+                    new String[] { String.valueOf(parentId)}, null);
+        }
+
+        if (c.moveToFirst()) {
+            do {
+                OCFile child = createFileInstance(c);
+                ret.add(child);
+            } while (c.moveToNext());
+        }
+
+        c.close();
+
+        Collections.sort(ret);
+
+        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));

         }
         }

+        
+        updatefolderSize(id, folderSize);

     }
 
     }
 

+    /**
+     * 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;
+    }
+
+    /** 
+     * 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();
+            
+        }              
+        
+    }
+    

 }
 }