src/eu/alefzero/owncloud/providers/FileContentProvider.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation, either version 3 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package eu.alefzero.owncloud.providers;
  20
  21 import java.util.HashMap;
  22
  23 import eu.alefzero.owncloud.db.ProviderMeta;
  24 import eu.alefzero.owncloud.db.ProviderMeta.ProviderTableMeta;
  25
  26 import android.content.ContentProvider;
  27 import android.content.ContentUris;
  28 import android.content.ContentValues;
  29 import android.content.Context;
  30 import android.content.UriMatcher;
  31 import android.database.Cursor;
  32 import android.database.SQLException;
  33 import android.database.sqlite.SQLiteDatabase;
  34 import android.database.sqlite.SQLiteOpenHelper;
  35 import android.database.sqlite.SQLiteQueryBuilder;
  36 import android.net.Uri;
  37 import android.text.TextUtils;
  38
  39 /**
  40 * The ContentProvider for the ownCloud App.
  41 * @author Bartek Przybylski
  42 *
  43 */
  44 public class FileContentProvider extends ContentProvider {
  45
  46   private DataBaseHelper mDbHelper;
  47
  48   private static HashMap<String, String> mProjectionMap;
  49   static {
  50     mProjectionMap = new HashMap<String, String>();
  51     mProjectionMap.put(ProviderTableMeta._ID,
  52                        ProviderTableMeta._ID);
  53     mProjectionMap.put(ProviderTableMeta.FILE_PARENT,
  54                        ProviderTableMeta.FILE_PARENT);
  55     mProjectionMap.put(ProviderTableMeta.FILE_PATH,
  56                        ProviderTableMeta.FILE_PATH);
  57     mProjectionMap.put(ProviderTableMeta.FILE_NAME,
  58                        ProviderTableMeta.FILE_NAME);
  59     mProjectionMap.put(ProviderTableMeta.FILE_CREATION,
  60                        ProviderTableMeta.FILE_CREATION);
  61     mProjectionMap.put(ProviderTableMeta.FILE_MODIFIED,
  62                        ProviderTableMeta.FILE_MODIFIED);
  63     mProjectionMap.put(ProviderTableMeta.FILE_CONTENT_LENGTH,
  64                        ProviderTableMeta.FILE_CONTENT_LENGTH);
  65     mProjectionMap.put(ProviderTableMeta.FILE_CONTENT_TYPE,
  66                        ProviderTableMeta.FILE_CONTENT_TYPE);
  67     mProjectionMap.put(ProviderTableMeta.FILE_STORAGE_PATH,
  68                        ProviderTableMeta.FILE_STORAGE_PATH);
  69   }
  70
  71   private static final int SINGLE_FILE = 1;
  72   private static final int DIRECTORY = 2;
  73   private static final int ROOT_DIRECTORY = 3;
  74   private static final UriMatcher mUriMatcher;
  75   static {
  76     mUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
  77     mUriMatcher.addURI(ProviderMeta.AUTHORITY_FILES, "/", ROOT_DIRECTORY);
  78     mUriMatcher.addURI(ProviderMeta.AUTHORITY_FILES, "file/", SINGLE_FILE);
  79     mUriMatcher.addURI(ProviderMeta.AUTHORITY_FILES, "file/#", SINGLE_FILE);
  80     mUriMatcher.addURI(ProviderMeta.AUTHORITY_FILES, "dir/#", DIRECTORY);
  81   }
  82
  83   @Override
  84   public int delete(Uri uri, String where, String[] whereArgs) {
  85     SQLiteDatabase db = mDbHelper.getWritableDatabase();
  86     int count = 0;
  87     switch (mUriMatcher.match(uri)) {
  88       case SINGLE_FILE:
  89         count = db.delete(ProviderTableMeta.DB_NAME,
  90                           ProviderTableMeta._ID + "=" + uri.getPathSegments().get(1)
  91                           + (!TextUtils.isEmpty(where)?" AND (" + where +")" : ""),
  92                           whereArgs);
  93         break;
  94       case ROOT_DIRECTORY:
  95         count = db.delete(ProviderTableMeta.DB_NAME, where, whereArgs);
  96         break;
  97       default:
  98         throw new IllegalArgumentException("Unknown uri: " + uri.toString());
  99     }
 100     getContext().getContentResolver().notifyChange(uri, null);
 101     return count;
 102   }
 103
 104   @Override
 105   public String getType(Uri uri) {
 106     switch (mUriMatcher.match(uri)) {
 107       case ROOT_DIRECTORY:
 108         return ProviderTableMeta.CONTENT_TYPE;
 109       case SINGLE_FILE:
 110         return ProviderTableMeta.CONTENT_TYPE_ITEM;
 111       default:
 112         throw new IllegalArgumentException("Unknown Uri id." + uri.toString());
 113     }
 114   }
 115
 116   @Override
 117   public Uri insert(Uri uri, ContentValues values) {
 118     if (mUriMatcher.match(uri) != SINGLE_FILE) {
 119       throw new IllegalArgumentException("Unknown uri id: " + uri);
 120     }
 121
 122     SQLiteDatabase db = mDbHelper.getWritableDatabase();
 123     long rowId = db.insert(ProviderTableMeta.DB_NAME, null, values);
 124     if (rowId > 0) {
 125       Uri insertedFileUri = ContentUris.withAppendedId(ProviderTableMeta.CONTENT_URI_FILE, rowId);
 126       getContext().getContentResolver().notifyChange(insertedFileUri, null);
 127       return insertedFileUri;
 128     }
 129     throw new SQLException("ERROR " + uri);
 130   }
 131
 132   @Override
 133   public boolean onCreate() {
 134     mDbHelper = new DataBaseHelper(getContext());
 135     return true;
 136   }
 137
 138   @Override
 139   public Cursor query(Uri uri, String[] projection, String selection,
 140       String[] selectionArgs, String sortOrder) {
 141     SQLiteQueryBuilder sqlQuery = new SQLiteQueryBuilder();
 142
 143     sqlQuery.setTables(ProviderTableMeta.DB_NAME);
 144     sqlQuery.setProjectionMap(mProjectionMap);
 145
 146     switch (mUriMatcher.match(uri)) {
 147       case ROOT_DIRECTORY:
 148         break;
 149       case DIRECTORY:
 150         sqlQuery.appendWhere(ProviderTableMeta.FILE_PARENT + "="+uri.getPathSegments().get(1));
 151         break;
 152       case SINGLE_FILE:
 153         if (uri.getPathSegments().size() > 1) {
 154           sqlQuery.appendWhere(ProviderTableMeta._ID + "=" +
 155                                uri.getPathSegments().get(1));
 156         }
 157         break;
 158       default:
 159         throw new IllegalArgumentException("Unknown uri id: " + uri);
 160     }
 161
 162     String order;
 163     if (TextUtils.isEmpty(sortOrder)) {
 164       order = ProviderTableMeta.DEFAULT_SORT_ORDER;
 165     } else {
 166       order = sortOrder;
 167     }
 168
 169     SQLiteDatabase db = mDbHelper.getReadableDatabase();
 170     Cursor c = sqlQuery.query(db, projection, selection, selectionArgs, null, null, order);
 171
 172     c.setNotificationUri(getContext().getContentResolver(), uri);
 173
 174     return c;
 175   }
 176
 177   @Override
 178   public int update(Uri uri, ContentValues values, String selection,
 179       String[] selectionArgs) {
 180     return mDbHelper.getWritableDatabase().update(ProviderTableMeta.DB_NAME, values, selection, selectionArgs);
 181   }
 182
 183   class DataBaseHelper extends SQLiteOpenHelper {
 184
 185     public DataBaseHelper(Context context) {
 186       super(context, ProviderMeta.DB_NAME, null, ProviderMeta.DB_VERSION);
 187
 188     }
 189
 190     @Override
 191     public void onCreate(SQLiteDatabase db) {
 192       db.execSQL("CREATE TABLE " + ProviderTableMeta.DB_NAME + "(" +
 193                  ProviderTableMeta._ID + " INTEGER PRIMARY KEY, " +
 194                  ProviderTableMeta.FILE_NAME + " TEXT, " +
 195                  ProviderTableMeta.FILE_PATH + " TEXT, " +
 196                  ProviderTableMeta.FILE_PARENT + " INTEGER, " +
 197                  ProviderTableMeta.FILE_CREATION + " INTEGER, " +
 198                  ProviderTableMeta.FILE_MODIFIED + " INTEGER, " +
 199                  ProviderTableMeta.FILE_CONTENT_TYPE + " TEXT, " +
 200                  ProviderTableMeta.FILE_CONTENT_LENGTH + " INTEGER, " +
 201                  ProviderTableMeta.FILE_STORAGE_PATH + " TEXT, " +
 202                  ProviderTableMeta.FILE_ACCOUNT_OWNER + " TEXT);");
 203     }
 204
 205     @Override
 206     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 207
 208     }
 209
 210   }
 211
 212 }