diff options
Diffstat (limited to 'common/src/com/android/tv/common/CommonPreferenceProvider.java')
| -rw-r--r-- | common/src/com/android/tv/common/CommonPreferenceProvider.java | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/common/src/com/android/tv/common/CommonPreferenceProvider.java b/common/src/com/android/tv/common/CommonPreferenceProvider.java new file mode 100644 index 00000000..b0be3038 --- /dev/null +++ b/common/src/com/android/tv/common/CommonPreferenceProvider.java @@ -0,0 +1,215 @@ +/* + * Copyright (C) 2015 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.tv.common; + +import android.content.ContentProvider; +import android.content.ContentValues; +import android.content.Context; +import android.content.UriMatcher; +import android.database.Cursor; +import android.database.sqlite.SQLiteDatabase; +import android.database.sqlite.SQLiteException; +import android.database.sqlite.SQLiteOpenHelper; +import android.net.Uri; + +/** + * A content provider for storing common preferences. It's used across TV app and tuner TV inputs. + */ +public class CommonPreferenceProvider extends ContentProvider { + /** The authority of the provider */ + public static final String AUTHORITY = CommonConstants.BASE_PACKAGE + ".common.preferences"; + + private static final String PATH_PREFERENCES = "preferences"; + + private static final int DATABASE_VERSION = 1; + private static final String DATABASE_NAME = "usbtuner_preferences.db"; + private static final String PREFERENCES_TABLE = "preferences"; + + private static final int MATCH_PREFERENCE = 1; + private static final int MATCH_PREFERENCE_KEY = 2; + + private static final UriMatcher sUriMatcher; + + private DatabaseOpenHelper mDatabaseOpenHelper; + + static { + sUriMatcher = new UriMatcher(UriMatcher.NO_MATCH); + sUriMatcher.addURI(AUTHORITY, "preferences", MATCH_PREFERENCE); + sUriMatcher.addURI(AUTHORITY, "preferences/*", MATCH_PREFERENCE_KEY); + } + + /** + * Builds a Uri that points to a specific preference. + * + * @param key a key of the preference to point to + */ + public static Uri buildPreferenceUri(String key) { + return Preferences.CONTENT_URI.buildUpon().appendPath(key).build(); + } + + /** Columns definitions for the preferences table. */ + public interface Preferences { + + /** The content:// style for the preferences table. */ + Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/" + PATH_PREFERENCES); + + /** The MIME type of a directory of preferences. */ + String CONTENT_TYPE = "vnd.android.cursor.dir/preferences"; + + /** The MIME type of a single preference. */ + String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/preferences"; + + /** + * The ID of this preference. + * + * <p>This is auto-incremented. + * + * <p>Type: INTEGER + */ + String _ID = "_id"; + + /** + * The key of this preference. + * + * <p>Should be unique. + * + * <p>Type: TEXT + */ + String COLUMN_KEY = "key"; + + /** + * The value of this preference. + * + * <p>Type: TEXT + */ + String COLUMN_VALUE = "value"; + } + + private static class DatabaseOpenHelper extends SQLiteOpenHelper { + public DatabaseOpenHelper(Context context) { + super(context, DATABASE_NAME, null, DATABASE_VERSION); + } + + @Override + public void onCreate(SQLiteDatabase db) { + db.execSQL( + "CREATE TABLE " + + PREFERENCES_TABLE + + " (" + + Preferences._ID + + " INTEGER PRIMARY KEY AUTOINCREMENT," + + Preferences.COLUMN_KEY + + " TEXT NOT NULL," + + Preferences.COLUMN_VALUE + + " TEXT);"); + } + + @Override + public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { + // No-op + } + } + + @Override + public boolean onCreate() { + mDatabaseOpenHelper = new DatabaseOpenHelper(getContext()); + return true; + } + + @Override + public Cursor query( + Uri uri, + String[] projection, + String selection, + String[] selectionArgs, + String sortOrder) { + int match = sUriMatcher.match(uri); + if (match != MATCH_PREFERENCE && match != MATCH_PREFERENCE_KEY) { + throw new UnsupportedOperationException(); + } + SQLiteDatabase db = mDatabaseOpenHelper.getReadableDatabase(); + Cursor cursor = + db.query( + PREFERENCES_TABLE, + projection, + selection, + selectionArgs, + null, + null, + sortOrder); + cursor.setNotificationUri(getContext().getContentResolver(), uri); + return cursor; + } + + @Override + public String getType(Uri uri) { + switch (sUriMatcher.match(uri)) { + case MATCH_PREFERENCE: + return Preferences.CONTENT_TYPE; + case MATCH_PREFERENCE_KEY: + return Preferences.CONTENT_ITEM_TYPE; + default: + throw new IllegalArgumentException("Unknown URI " + uri); + } + } + + /** + * Inserts a preference row into the preference table. + * + * <p>If a key is already exists in the table, it removes the old row and inserts a new row. + * + * @param uri the URL of the table to insert into + * @param values the initial values for the newly inserted row + * @return the URL of the newly created row + */ + @Override + public Uri insert(Uri uri, ContentValues values) { + if (sUriMatcher.match(uri) != MATCH_PREFERENCE) { + throw new UnsupportedOperationException(); + } + return insertRow(uri, values); + } + + private Uri insertRow(Uri uri, ContentValues values) { + SQLiteDatabase db = mDatabaseOpenHelper.getWritableDatabase(); + + // Remove the old row. + db.delete( + PREFERENCES_TABLE, + Preferences.COLUMN_KEY + " like ?", + new String[] {values.getAsString(Preferences.COLUMN_KEY)}); + + long rowId = db.insert(PREFERENCES_TABLE, null, values); + if (rowId > 0) { + Uri rowUri = buildPreferenceUri(values.getAsString(Preferences.COLUMN_KEY)); + getContext().getContentResolver().notifyChange(rowUri, null); + return rowUri; + } + + throw new SQLiteException("Failed to insert row into " + uri); + } + + @Override + public int delete(Uri uri, String selection, String[] selectionArgs) { + throw new UnsupportedOperationException(); + } + + @Override + public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { + throw new UnsupportedOperationException(); + } +} |