/*
* Copyright (C) 2010 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.quicksearchbox.util;
import android.database.sqlite.SQLiteDatabase;
/**
* Abstract helper base class for asynchronous SQLite queries.
*
* @param <A> The type of the result of the query.
*/
public abstract class SQLiteAsyncQuery<A> {
/**
* Performs a query and computes some value from the result
*
* @param db A readable database.
* @return The result of the query.
*/
protected abstract A performQuery(SQLiteDatabase db);
/**
* Runs the query against the database and passes the result to the consumer.
*/
public void run(SQLiteDatabase db, Consumer<A> consumer) {
A result = performQuery(db);
consumer.consume(result);
}
}