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/**
* Copyright (C) 2014 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.server.voiceinteraction;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.hardware.soundtrigger.SoundTrigger;
import android.hardware.soundtrigger.SoundTrigger.Keyphrase;
import android.hardware.soundtrigger.SoundTrigger.KeyphraseSoundModel;
import android.util.Slog;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
/**
* @hide
*/
public class DatabaseHelper extends SQLiteOpenHelper {
static final String TAG = "SoundModelDBHelper";
private static final String NAME = "sound_model.db";
private static final int VERSION = 1;
public static interface KeyphraseContract {
public static final String TABLE = "keyphrase";
public static final String KEY_ID = "_id";
public static final String KEY_RECOGNITION_MODES = "modes";
public static final String KEY_LOCALE = "locale";
public static final String KEY_HINT_TEXT = "hint_text";
public static final String KEY_USERS = "users";
public static final String KEY_SOUND_MODEL_ID = "sound_model_id";
}
public static interface SoundModelContract {
public static final String TABLE = "sound_model";
public static final String KEY_ID = "_id";
public static final String KEY_TYPE = "type";
public static final String KEY_DATA = "data";
}
// Table Create Statements
private static final String CREATE_TABLE_KEYPRHASES = "CREATE TABLE "
+ KeyphraseContract.TABLE + "("
+ KeyphraseContract.KEY_ID + " INTEGER PRIMARY KEY,"
+ KeyphraseContract.KEY_RECOGNITION_MODES + " INTEGER,"
+ KeyphraseContract.KEY_USERS + " INTEGER,"
+ KeyphraseContract.KEY_SOUND_MODEL_ID + " TEXT,"
+ KeyphraseContract.KEY_LOCALE + " TEXT,"
+ KeyphraseContract.KEY_HINT_TEXT + " TEXT" + ")";
private static final String CREATE_TABLE_SOUND_MODEL = "CREATE TABLE "
+ SoundModelContract.TABLE + "("
+ SoundModelContract.KEY_ID + " TEXT PRIMARY KEY,"
+ SoundModelContract.KEY_TYPE + " INTEGER,"
+ SoundModelContract.KEY_DATA + " BLOB" + ")";
public DatabaseHelper(Context context, CursorFactory factory) {
super(context, NAME, null, VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
// creating required tables
db.execSQL(CREATE_TABLE_KEYPRHASES);
db.execSQL(CREATE_TABLE_SOUND_MODEL);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO(sansid): For now, drop older tables and recreate new ones.
db.execSQL("DROP TABLE IF EXISTS " + KeyphraseContract.TABLE);
db.execSQL("DROP TABLE IF EXISTS " + SoundModelContract.TABLE);
onCreate(db);
}
/**
* TODO(sansid): Change to addOrUpdate to handle changes here.
*/
public void addKeyphraseSoundModel(KeyphraseSoundModel soundModel) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
// Generate a random ID for the model.
values.put(SoundModelContract.KEY_ID, soundModel.uuid.toString());
values.put(SoundModelContract.KEY_DATA, soundModel.data);
values.put(SoundModelContract.KEY_TYPE, SoundTrigger.SoundModel.TYPE_KEYPHRASE);
if (db.insert(SoundModelContract.TABLE, null, values) != -1) {
for (Keyphrase keyphrase : soundModel.keyphrases) {
addKeyphrase(soundModel.uuid, keyphrase);
}
} else {
Slog.w(TAG, "Failed to persist sound model to database");
}
}
/**
* TODO(sansid): Change to addOrUpdate to handle changes here.
*/
private void addKeyphrase(UUID modelId, SoundTrigger.Keyphrase keyphrase) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KeyphraseContract.KEY_ID, keyphrase.id);
values.put(KeyphraseContract.KEY_RECOGNITION_MODES, keyphrase.recognitionModes);
values.put(KeyphraseContract.KEY_SOUND_MODEL_ID, keyphrase.id);
values.put(KeyphraseContract.KEY_HINT_TEXT, keyphrase.text);
values.put(KeyphraseContract.KEY_LOCALE, keyphrase.locale);
if (db.insert(KeyphraseContract.TABLE, null, values) == -1) {
Slog.w(TAG, "Failed to persist keyphrase to database");
}
}
/**
* Lists all the keyphrase sound models currently registered with the system.
*/
public List<KeyphraseSoundModel> getKephraseSoundModels() {
List<KeyphraseSoundModel> models = new ArrayList<>();
String selectQuery = "SELECT * FROM " + SoundModelContract.TABLE;
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (c.moveToFirst()) {
do {
int type = c.getInt(c.getColumnIndex(SoundModelContract.KEY_TYPE));
if (type != SoundTrigger.SoundModel.TYPE_KEYPHRASE) {
// Ignore non-keyphrase sound models.
continue;
}
String id = c.getString(c.getColumnIndex(SoundModelContract.KEY_ID));
byte[] data = c.getBlob(c.getColumnIndex(SoundModelContract.KEY_DATA));
// Get all the keyphrases for this this sound model.
models.add(new KeyphraseSoundModel(
UUID.fromString(id), data, getKeyphrasesForSoundModel(id)));
} while (c.moveToNext());
}
return models;
}
private Keyphrase[] getKeyphrasesForSoundModel(String modelId) {
List<Keyphrase> keyphrases = new ArrayList<>();
String selectQuery = "SELECT * FROM " + KeyphraseContract.TABLE
+ " WHERE " + KeyphraseContract.KEY_SOUND_MODEL_ID + " = '" + modelId + "'";
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (c.moveToFirst()) {
do {
int id = c.getInt(c.getColumnIndex(KeyphraseContract.KEY_ID));
int modes = c.getInt(c.getColumnIndex(KeyphraseContract.KEY_RECOGNITION_MODES));
int[] users = {c.getInt(c.getColumnIndex(KeyphraseContract.KEY_USERS))};
String locale = c.getString(c.getColumnIndex(KeyphraseContract.KEY_LOCALE));
String hintText = c.getString(c.getColumnIndex(KeyphraseContract.KEY_HINT_TEXT));
keyphrases.add(new Keyphrase(id, modes, locale, hintText, users));
} while (c.moveToNext());
}
Keyphrase[] keyphraseArr = new Keyphrase[keyphrases.size()];
keyphrases.toArray(keyphraseArr);
return keyphraseArr;
}
}
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