content: /**
   * 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.bigtop.datagenerators.bigpetstore.generators.transaction;
  
  import org.apache.bigtop.datagenerators.samplers.samplers.Sampler;
  
  public class ProposedPurchaseTimeSampler implements Sampler<Double>
  {
  	final CustomerInventory customerInventory;
  	final Sampler<Double> arrivalTimeSampler;
  
  	public ProposedPurchaseTimeSampler(CustomerInventory customerInventory,
  			Sampler<Double> arrivalTimeSampler)
  	{
  		this.customerInventory = customerInventory;
  		this.arrivalTimeSampler = arrivalTimeSampler;
  	}
  
  	protected double categoryProposedTime(double exhaustionTime) throws Exception
  	{
  		return Math.max(exhaustionTime - arrivalTimeSampler.sample(), 0.0);
  	}
  
  	public Double sample() throws Exception
  	{
  		double minProposedTime = Double.MAX_VALUE;
  		for(Double exhaustionTime : this.customerInventory.getExhaustionTimes().values())
  		{
  			double proposedTime = this.categoryProposedTime(exhaustionTime);
  			minProposedTime = Math.min(proposedTime, minProposedTime);
  		}
  
  		return minProposedTime;
  	}
  
  }
  