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With inspiration from other libraries

There is a newer version: 5.17.0

package io.nosqlbench.virtdata.library.realer;

/*
 * Copyright (c) 2022 nosqlbench
 * 
 * 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.
 */


import io.nosqlbench.virtdata.api.annotations.Categories;
import io.nosqlbench.virtdata.api.annotations.Category;
import io.nosqlbench.virtdata.api.annotations.Example;
import io.nosqlbench.virtdata.api.annotations.ThreadSafeMapper;
import io.nosqlbench.virtdata.library.basics.shared.distributions.CSVSampler;

/**
 * Return a county name weighted by population density.
 */
@ThreadSafeMapper
@Categories(Category.premade)
public class CountiesByDensity extends CSVSampler {
    @Example("CountiesByDensity()")
    public CountiesByDensity() {
        super("county_name","density","data/simplemaps/uszips.csv");
    }
}