HypoExponentialGen.java

/*
 * Class:        HypoExponentialGen
 * Description:  random variate generators for the hypoexponential distribution 
 * Environment:  Java
 * Software:     SSJ 
 * Copyright (C) 2001  Pierre L'Ecuyer and Universite de Montreal
 * Organization: DIRO, Universite de Montreal
 * @author       Richard Simard
 * @since        January 2011
 *
 *
 * 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 umontreal.ssj.randvar;
 
import umontreal.ssj.rng.*;
import umontreal.ssj.probdist.*;

public class HypoExponentialGen extends RandomVariateGen {

   public HypoExponentialGen(RandomStream stream, double[] lambda) {
      super(stream, new HypoExponentialDist(lambda));
   }

   public HypoExponentialGen(RandomStream stream, HypoExponentialDist dist) {
      super(stream, dist);
//      if (dist != null)
//         setParams (dist.getLambda());
   }

   public static double nextDouble(RandomStream stream, double[] lambda) {
      return HypoExponentialDist.inverseF(lambda, stream.nextDouble());
   }

   public double[] getLambda() {
      return ((HypoExponentialDist) dist).getLambda();
   }

   public void setLambda(double[] lambda) {
      ((HypoExponentialDist) dist).setLambda(lambda);
   }
 
}