/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cassandra.stress.generate.values;
import java.util.Arrays;
import java.util.List;
import org.apache.cassandra.db.marshal.ListType;
public class Lists<T> extends Generator<List<T>>
{
final Generator<T> valueType;
final T[] buffer;
@SuppressWarnings("unchecked")
public Lists(String name, Generator<T> valueType, GeneratorConfig config)
{
super(ListType.getInstance(valueType.type, true), config, name, List.class);
this.valueType = valueType;
buffer = (T[]) new Object[(int) sizeDistribution.maxValue()];
}
public void setSeed(long seed)
{
super.setSeed(seed);
valueType.setSeed(seed * 31);
}
@Override
public List<T> generate()
{
int size = (int) sizeDistribution.next();
for (int i = 0 ; i < size ; i++)
buffer[i] = valueType.generate();
return com.google.common.collect.Lists.newArrayList(Arrays.copyOf(buffer, size));
}
}