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  *
  42  * @author Bartek Przybylski
  43  *
  44  */
  45 public class FileContentProvider extends ContentProvider {
  46
  47     private DataBaseHelper mDbHelper;
  48
  49     private static HashMap<String, String> mProjectionMap;
  50     static {
  51         mProjectionMap = new HashMap<String, String>();
  52         mProjectionMap.put(ProviderTableMeta._ID, 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         mProjectionMap.put(ProviderTableMeta.FILE_LAST_SYNC_DATE,
  70                 ProviderTableMeta.FILE_LAST_SYNC_DATE);
  71     }
  72
  73     private static final int SINGLE_FILE = 1;
  74     private static final int DIRECTORY = 2;
  75     private static final int ROOT_DIRECTORY = 3;
  76     private static final UriMatcher mUriMatcher;
  77     static {
  78         mUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
  79         mUriMatcher.addURI(ProviderMeta.AUTHORITY_FILES, "/", ROOT_DIRECTORY);
  80         mUriMatcher.addURI(ProviderMeta.AUTHORITY_FILES, "file/", SINGLE_FILE);
  81         mUriMatcher.addURI(ProviderMeta.AUTHORITY_FILES, "file/#", SINGLE_FILE);
  82         mUriMatcher.addURI(ProviderMeta.AUTHORITY_FILES, "dir/#", DIRECTORY);
  83     }
  84
  85     @Override
  86     public int delete(Uri uri, String where, String[] whereArgs) {
  87         SQLiteDatabase db = mDbHelper.getWritableDatabase();
  88         int count = 0;
  89         switch (mUriMatcher.match(uri)) {
  90         case SINGLE_FILE:
  91             count = db.delete(ProviderTableMeta.DB_NAME,
  92                     ProviderTableMeta._ID
  93                             + "="
  94                             + uri.getPathSegments().get(1)
  95                             + (!TextUtils.isEmpty(where) ? " AND (" + where
  96                                     + ")" : ""), whereArgs);
  97             break;
  98         case ROOT_DIRECTORY:
  99             count = db.delete(ProviderTableMeta.DB_NAME, where, whereArgs);
 100             break;
 101         default:
 102             throw new IllegalArgumentException("Unknown uri: " + uri.toString());
 103         }
 104         getContext().getContentResolver().notifyChange(uri, null);
 105         return count;
 106     }
 107
 108     @Override
 109     public String getType(Uri uri) {
 110         switch (mUriMatcher.match(uri)) {
 111         case ROOT_DIRECTORY:
 112             return ProviderTableMeta.CONTENT_TYPE;
 113         case SINGLE_FILE:
 114             return ProviderTableMeta.CONTENT_TYPE_ITEM;
 115         default:
 116             throw new IllegalArgumentException("Unknown Uri id."
 117                     + uri.toString());
 118         }
 119     }
 120
 121     @Override
 122     public Uri insert(Uri uri, ContentValues values) {
 123         if (mUriMatcher.match(uri) != SINGLE_FILE) {
 124             throw new IllegalArgumentException("Unknown uri id: " + uri);
 125         }
 126
 127         SQLiteDatabase db = mDbHelper.getWritableDatabase();
 128         long rowId = db.insert(ProviderTableMeta.DB_NAME, null, values);
 129         if (rowId > 0) {
 130             Uri insertedFileUri = ContentUris.withAppendedId(
 131                     ProviderTableMeta.CONTENT_URI_FILE, rowId);
 132             getContext().getContentResolver().notifyChange(insertedFileUri,
 133                     null);
 134             return insertedFileUri;
 135         }
 136         throw new SQLException("ERROR " + uri);
 137     }
 138
 139     @Override
 140     public boolean onCreate() {
 141         mDbHelper = new DataBaseHelper(getContext());
 142         return true;
 143     }
 144
 145     @Override
 146     public Cursor query(Uri uri, String[] projection, String selection,
 147             String[] selectionArgs, String sortOrder) {
 148         SQLiteQueryBuilder sqlQuery = new SQLiteQueryBuilder();
 149
 150         sqlQuery.setTables(ProviderTableMeta.DB_NAME);
 151         sqlQuery.setProjectionMap(mProjectionMap);
 152
 153         switch (mUriMatcher.match(uri)) {
 154         case ROOT_DIRECTORY:
 155             break;
 156         case DIRECTORY:
 157             sqlQuery.appendWhere(ProviderTableMeta.FILE_PARENT + "="
 158                     + uri.getPathSegments().get(1));
 159             break;
 160         case SINGLE_FILE:
 161             if (uri.getPathSegments().size() > 1) {
 162                 sqlQuery.appendWhere(ProviderTableMeta._ID + "="
 163                         + uri.getPathSegments().get(1));
 164             }
 165             break;
 166         default:
 167             throw new IllegalArgumentException("Unknown uri id: " + uri);
 168         }
 169
 170         String order;
 171         if (TextUtils.isEmpty(sortOrder)) {
 172             order = ProviderTableMeta.DEFAULT_SORT_ORDER;
 173         } else {
 174             order = sortOrder;
 175         }
 176
 177         SQLiteDatabase db = mDbHelper.getReadableDatabase();
 178         Cursor c = sqlQuery.query(db, projection, selection, selectionArgs,
 179                 null, null, order);
 180
 181         c.setNotificationUri(getContext().getContentResolver(), uri);
 182
 183         return c;
 184     }
 185
 186     @Override
 187     public int update(Uri uri, ContentValues values, String selection,
 188             String[] selectionArgs) {
 189         return mDbHelper.getWritableDatabase().update(
 190                 ProviderTableMeta.DB_NAME, values, selection, selectionArgs);
 191     }
 192
 193     class DataBaseHelper extends SQLiteOpenHelper {
 194
 195         public DataBaseHelper(Context context) {
 196             super(context, ProviderMeta.DB_NAME, null, ProviderMeta.DB_VERSION);
 197
 198         }
 199
 200         @Override
 201         public void onCreate(SQLiteDatabase db) {
 202             // files table
 203             db.execSQL("CREATE TABLE " + ProviderTableMeta.DB_NAME + "("
 204                     + ProviderTableMeta._ID + " INTEGER PRIMARY KEY, "
 205                     + ProviderTableMeta.FILE_NAME + " TEXT, "
 206                     + ProviderTableMeta.FILE_PATH + " TEXT, "
 207                     + ProviderTableMeta.FILE_PARENT + " INTEGER, "
 208                     + ProviderTableMeta.FILE_CREATION + " INTEGER, "
 209                     + ProviderTableMeta.FILE_MODIFIED + " INTEGER, "
 210                     + ProviderTableMeta.FILE_CONTENT_TYPE + " TEXT, "
 211                     + ProviderTableMeta.FILE_CONTENT_LENGTH + " INTEGER, "
 212                     + ProviderTableMeta.FILE_STORAGE_PATH + " TEXT, "
 213                     + ProviderTableMeta.FILE_ACCOUNT_OWNER + " TEXT, "
 214                     + ProviderTableMeta.FILE_LAST_SYNC_DATE + " INTEGER );");
 215         }
 216
 217         @Override
 218         public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 219
 220         }
 221
 222     }
 223
 224 }