/*
 * Copyright 2017 dmb.star-net.cn
 *
 * 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.
 */

'use strict'
var SamplingRateSampler = require('./sampling_rate_sampler')
var TrueSampler = require('./true_sampler.js')
var FalseSampler = require('./false_sampler.js')

function createSampler(sampling, samplingRate) {
  if (!sampling || samplingRate <= 0) {
    return new FalseSampler()
  }
  if (samplingRate === 1) {
    return new TrueSampler()
  }
  return new SamplingRateSampler(samplingRate)
}

module.exports.createSampler = createSampler


