/*
 * Copyright 2010 LinkedIn, Inc
 * 
 * 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 voldemort.performance.benchmark.generator;

import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

public class FileIntegerGenerator extends IntegerGenerator {

    private List<Integer> keys = null;
    private final AtomicInteger index;

    public FileIntegerGenerator(int start, List<Integer> keys) {
        this.index = new AtomicInteger(start);
        this.keys = keys;
    }

    @Override
    public int nextInt() {
        int number = keys.get(index.getAndIncrement() % keys.size());
        setLastInt(number);
        return number;
    }
}