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/*
* Copyright (C) 2023 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.internal.telephony.analytics;
import static com.android.internal.telephony.analytics.TelephonyAnalyticsDatabase.DATE_FORMAT;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import com.android.internal.annotations.VisibleForTesting;
import com.android.telephony.Rlog;
import java.util.Calendar;
/**
* Singleton Utility class to support TelephonyAnalytics Extends SQLiteOpenHelper class. Supports db
* related operations which includes creating tables,insertion,updation,deletion. Supports some
* generic functionality like getting the Cursor resulting from a query.
*/
public class TelephonyAnalyticsUtil extends SQLiteOpenHelper {
private static TelephonyAnalyticsUtil sTelephonyAnalyticsUtil;
private static final String DATABASE_NAME = "telephony_analytics.db";
private static final int DATABASE_VERSION = 10;
private static final String TAG = TelephonyAnalyticsUtil.class.getSimpleName();
private static final int MAX_ENTRIES_LIMIT = 1000;
private static final int CUTOFF_MONTHS = 2;
private TelephonyAnalyticsUtil(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
/**
* Get the instance of the TelephonyAnalyticsUtil class. Instantiates the TelephonyAnalyticsUtil
* object sTelephonyAnalyticsUtil only once.
*
* @return Returns the TelephonyAnalyticsUtil object sTelephonyAnalyticsUtil.
*/
public static synchronized TelephonyAnalyticsUtil getInstance(Context context) {
if (sTelephonyAnalyticsUtil == null) {
sTelephonyAnalyticsUtil = new TelephonyAnalyticsUtil(context);
}
return sTelephonyAnalyticsUtil;
}
@Override
public void onCreate(SQLiteDatabase db) {}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {}
/**
* Uses Util class functionality to create CallTable in db
*
* @param createTableQuery : CallTable Schema
*/
@VisibleForTesting
public synchronized void createTable(String createTableQuery) {
try {
SQLiteDatabase db = getWritableDatabase();
db.execSQL(createTableQuery);
} catch (Exception e) {
Rlog.e(TAG, "Error during table creation : " + e);
}
}
/** Utility function that performs insertion on the given database table */
@VisibleForTesting
public synchronized void insert(String tableName, ContentValues values) {
try {
SQLiteDatabase db = getWritableDatabase();
db.insert(tableName, null, values);
} catch (SQLException e) {
Rlog.e(TAG, "error occurred during insertion");
}
}
/** Utility function that performs update query on the given database table */
@VisibleForTesting
public synchronized int update(
String table, ContentValues values, String whereClause, String[] whereArgs) {
int rowsAffected = -1;
try {
SQLiteDatabase db = getWritableDatabase();
rowsAffected = db.update(table, values, whereClause, whereArgs);
} catch (SQLException e) {
Rlog.e(TAG, "Error during update.");
}
return rowsAffected;
}
/**
* @Return the cursor object obtained from running a query based on given parameters.
*/
@VisibleForTesting
public synchronized Cursor getCursor(
String tableName,
String[] columns,
String selection,
String[] selectionArgs,
String groupBy,
String having,
String orderBy,
String limit) {
Cursor cursor = null;
try {
SQLiteDatabase db = getReadableDatabase();
cursor =
db.query(
tableName,
columns,
selection,
selectionArgs,
groupBy,
having,
orderBy,
limit);
} catch (SQLException e) {
Rlog.e(TAG, "Error during querying for getCursor()" + e);
}
return cursor;
}
/** Returns the count stored in the cursor obtained from query execution. */
@VisibleForTesting
public synchronized long getCountFromCursor(Cursor cursor) {
long count = 0;
if (cursor != null && cursor.moveToFirst()) {
count = cursor.getInt(0);
}
return count;
}
/** Deletes Old Data and Overflow data in the db. */
@VisibleForTesting
public void deleteOverflowAndOldData(
String tableName, String overflowWhereClause, String oldDataWhereClause) {
deleteOverFlowData(tableName, overflowWhereClause);
deleteOldData(tableName, oldDataWhereClause);
}
protected void deleteOverFlowData(String tableName, String whereClause) {
String[] whereArgs = {Integer.toString(MAX_ENTRIES_LIMIT)};
delete(tableName, whereClause, whereArgs);
}
protected void deleteOldData(String tableName, String whereClause) {
String[] whereArgs = {getCutoffDate()};
delete(tableName, whereClause, whereArgs);
}
/** Utility function that performs deletion on the database table */
@VisibleForTesting
public synchronized void delete(String tableName, String whereClause, String[] whereArgs) {
try {
SQLiteDatabase db = getWritableDatabase();
db.delete(tableName, whereClause, whereArgs);
} catch (SQLException e) {
Rlog.e(TAG, "Sqlite Operation Error during deletion of Overflow data " + e);
}
}
private String getCutoffDate() {
Calendar cutoffDate = Calendar.getInstance();
cutoffDate.add(Calendar.MONTH, -1 * CUTOFF_MONTHS);
return DATE_FORMAT.format(cutoffDate.toInstant());
}
}
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