| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.browser.provider; |
| |
| import android.content.ContentProvider; |
| import android.content.ContentUris; |
| import android.content.ContentValues; |
| import android.content.Context; |
| import android.content.UriMatcher; |
| import android.database.Cursor; |
| import android.database.DatabaseUtils; |
| import android.database.sqlite.SQLiteDatabase; |
| import android.database.sqlite.SQLiteOpenHelper; |
| import android.database.sqlite.SQLiteQueryBuilder; |
| import android.net.Uri; |
| import android.os.FileUtils; |
| import android.provider.BrowserContract; |
| import android.text.TextUtils; |
| |
| import java.io.File; |
| |
| public class SnapshotProvider extends ContentProvider { |
| |
| public static interface Snapshots { |
| |
| public static final Uri CONTENT_URI = Uri.withAppendedPath( |
| SnapshotProvider.AUTHORITY_URI, "snapshots"); |
| public static final String _ID = "_id"; |
| @Deprecated |
| public static final String VIEWSTATE = "view_state"; |
| public static final String BACKGROUND = "background"; |
| public static final String TITLE = "title"; |
| public static final String URL = "url"; |
| public static final String FAVICON = "favicon"; |
| public static final String THUMBNAIL = "thumbnail"; |
| public static final String DATE_CREATED = "date_created"; |
| public static final String VIEWSTATE_PATH = "viewstate_path"; |
| public static final String VIEWSTATE_SIZE = "viewstate_size"; |
| } |
| |
| public static final String AUTHORITY = "com.android.browser.snapshots"; |
| public static final Uri AUTHORITY_URI = Uri.parse("content://" + AUTHORITY); |
| |
| static final String TABLE_SNAPSHOTS = "snapshots"; |
| static final int SNAPSHOTS = 10; |
| static final int SNAPSHOTS_ID = 11; |
| static final UriMatcher URI_MATCHER = new UriMatcher(UriMatcher.NO_MATCH); |
| // Workaround that we can't remove the "NOT NULL" constraint on VIEWSTATE |
| static final byte[] NULL_BLOB_HACK = new byte[0]; |
| |
| SnapshotDatabaseHelper mOpenHelper; |
| |
| static { |
| URI_MATCHER.addURI(AUTHORITY, "snapshots", SNAPSHOTS); |
| URI_MATCHER.addURI(AUTHORITY, "snapshots/#", SNAPSHOTS_ID); |
| } |
| |
| final static class SnapshotDatabaseHelper extends SQLiteOpenHelper { |
| |
| static final String DATABASE_NAME = "snapshots.db"; |
| static final int DATABASE_VERSION = 3; |
| |
| public SnapshotDatabaseHelper(Context context) { |
| super(context, DATABASE_NAME, null, DATABASE_VERSION); |
| } |
| |
| @Override |
| public void onCreate(SQLiteDatabase db) { |
| db.execSQL("CREATE TABLE " + TABLE_SNAPSHOTS + "(" + |
| Snapshots._ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + |
| Snapshots.TITLE + " TEXT," + |
| Snapshots.URL + " TEXT NOT NULL," + |
| Snapshots.DATE_CREATED + " INTEGER," + |
| Snapshots.FAVICON + " BLOB," + |
| Snapshots.THUMBNAIL + " BLOB," + |
| Snapshots.BACKGROUND + " INTEGER," + |
| Snapshots.VIEWSTATE + " BLOB NOT NULL," + |
| Snapshots.VIEWSTATE_PATH + " TEXT," + |
| Snapshots.VIEWSTATE_SIZE + " INTEGER" + |
| ");"); |
| } |
| |
| @Override |
| public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { |
| if (oldVersion < 2) { |
| db.execSQL("DROP TABLE " + TABLE_SNAPSHOTS); |
| onCreate(db); |
| } |
| if (oldVersion < 3) { |
| db.execSQL("ALTER TABLE " + TABLE_SNAPSHOTS + " ADD COLUMN " |
| + Snapshots.VIEWSTATE_PATH + " TEXT"); |
| db.execSQL("ALTER TABLE " + TABLE_SNAPSHOTS + " ADD COLUMN " |
| + Snapshots.VIEWSTATE_SIZE + " INTEGER"); |
| db.execSQL("UPDATE " + TABLE_SNAPSHOTS + " SET " |
| + Snapshots.VIEWSTATE_SIZE + " = length(" |
| + Snapshots.VIEWSTATE + ")"); |
| } |
| } |
| |
| } |
| |
| static File getOldDatabasePath(Context context) { |
| File dir = context.getExternalFilesDir(null); |
| return new File(dir, SnapshotDatabaseHelper.DATABASE_NAME); |
| } |
| |
| private void migrateToDataFolder() { |
| File dbPath = getContext().getDatabasePath(SnapshotDatabaseHelper.DATABASE_NAME); |
| if (dbPath.exists()) return; |
| File oldPath = getOldDatabasePath(getContext()); |
| if (oldPath.exists()) { |
| // Try to move |
| if (!oldPath.renameTo(dbPath)) { |
| // Failed, do a copy |
| FileUtils.copyFile(oldPath, dbPath); |
| } |
| // Cleanup |
| oldPath.delete(); |
| } |
| } |
| |
| @Override |
| public boolean onCreate() { |
| migrateToDataFolder(); |
| mOpenHelper = new SnapshotDatabaseHelper(getContext()); |
| return true; |
| } |
| |
| SQLiteDatabase getWritableDatabase() { |
| return mOpenHelper.getWritableDatabase(); |
| } |
| |
| SQLiteDatabase getReadableDatabase() { |
| return mOpenHelper.getReadableDatabase(); |
| } |
| |
| @Override |
| public Cursor query(Uri uri, String[] projection, String selection, |
| String[] selectionArgs, String sortOrder) { |
| SQLiteDatabase db = getReadableDatabase(); |
| if (db == null) { |
| return null; |
| } |
| final int match = URI_MATCHER.match(uri); |
| SQLiteQueryBuilder qb = new SQLiteQueryBuilder(); |
| String limit = uri.getQueryParameter(BrowserContract.PARAM_LIMIT); |
| switch (match) { |
| case SNAPSHOTS_ID: |
| selection = DatabaseUtils.concatenateWhere(selection, "_id=?"); |
| selectionArgs = DatabaseUtils.appendSelectionArgs(selectionArgs, |
| new String[] { Long.toString(ContentUris.parseId(uri)) }); |
| // fall through |
| case SNAPSHOTS: |
| qb.setTables(TABLE_SNAPSHOTS); |
| break; |
| |
| default: |
| throw new UnsupportedOperationException("Unknown URL " + uri.toString()); |
| } |
| Cursor cursor = qb.query(db, projection, selection, selectionArgs, |
| null, null, sortOrder, limit); |
| cursor.setNotificationUri(getContext().getContentResolver(), |
| AUTHORITY_URI); |
| return cursor; |
| } |
| |
| @Override |
| public String getType(Uri uri) { |
| return null; |
| } |
| |
| @Override |
| public Uri insert(Uri uri, ContentValues values) { |
| SQLiteDatabase db = getWritableDatabase(); |
| if (db == null) { |
| return null; |
| } |
| int match = URI_MATCHER.match(uri); |
| long id = -1; |
| switch (match) { |
| case SNAPSHOTS: |
| if (!values.containsKey(Snapshots.VIEWSTATE)) { |
| values.put(Snapshots.VIEWSTATE, NULL_BLOB_HACK); |
| } |
| id = db.insert(TABLE_SNAPSHOTS, Snapshots.TITLE, values); |
| break; |
| default: |
| throw new UnsupportedOperationException("Unknown insert URI " + uri); |
| } |
| if (id < 0) { |
| return null; |
| } |
| Uri inserted = ContentUris.withAppendedId(uri, id); |
| getContext().getContentResolver().notifyChange(inserted, null, false); |
| return inserted; |
| } |
| |
| static final String[] DELETE_PROJECTION = new String[] { |
| Snapshots.VIEWSTATE_PATH, |
| }; |
| private void deleteDataFiles(SQLiteDatabase db, String selection, |
| String[] selectionArgs) { |
| Cursor c = db.query(TABLE_SNAPSHOTS, DELETE_PROJECTION, selection, |
| selectionArgs, null, null, null); |
| final Context context = getContext(); |
| while (c.moveToNext()) { |
| String filename = c.getString(0); |
| if (TextUtils.isEmpty(filename)) { |
| continue; |
| } |
| File f = context.getFileStreamPath(filename); |
| if (f.exists()) { |
| if (!f.delete()) { |
| f.deleteOnExit(); |
| } |
| } |
| } |
| c.close(); |
| } |
| |
| @Override |
| public int delete(Uri uri, String selection, String[] selectionArgs) { |
| SQLiteDatabase db = getWritableDatabase(); |
| if (db == null) { |
| return 0; |
| } |
| int match = URI_MATCHER.match(uri); |
| int deleted = 0; |
| switch (match) { |
| case SNAPSHOTS_ID: { |
| selection = DatabaseUtils.concatenateWhere(selection, TABLE_SNAPSHOTS + "._id=?"); |
| selectionArgs = DatabaseUtils.appendSelectionArgs(selectionArgs, |
| new String[] { Long.toString(ContentUris.parseId(uri)) }); |
| // fall through |
| } |
| case SNAPSHOTS: |
| deleteDataFiles(db, selection, selectionArgs); |
| deleted = db.delete(TABLE_SNAPSHOTS, selection, selectionArgs); |
| break; |
| default: |
| throw new UnsupportedOperationException("Unknown delete URI " + uri); |
| } |
| if (deleted > 0) { |
| getContext().getContentResolver().notifyChange(uri, null, false); |
| } |
| return deleted; |
| } |
| |
| @Override |
| public int update(Uri uri, ContentValues values, String selection, |
| String[] selectionArgs) { |
| throw new UnsupportedOperationException("not implemented"); |
| } |
| |
| } |