package org.junit.tests.experimental.theories.extendingwithstubs;
   
   import java.util.ArrayList;
   import java.util.Collections;
   import java.util.List;
   
   import org.junit.experimental.theories.PotentialAssignment;
   import org.junit.internal.AssumptionViolatedException;
   
  public class GuesserQueue extends ArrayList<ReguessableValue> {
      static class ReguessableDecorator extends ReguessableValue {
          private final PotentialAssignment delegate;
  
          public ReguessableDecorator(PotentialAssignment delegate) {
              this.delegate = delegate;
          }
  
          @Override
          public List<ReguessableValue> reguesses(AssumptionViolatedException e) {
              return Collections.emptyList();
          }
  
          @Override
          public Object getValue() throws CouldNotGenerateValueException {
              return delegate.getValue();
          }
  
          @Override
          public String getDescription() throws CouldNotGenerateValueException {
              return delegate.getDescription();
          }
      }
  
      static GuesserQueue forSingleValues(
              List<PotentialAssignment> potentials) {
          GuesserQueue returnThis = new GuesserQueue();
          for (PotentialAssignment potentialParameterValue : potentials) {
              returnThis
                      .add(new GuesserQueue.ReguessableDecorator(potentialParameterValue));
          }
          return returnThis;
      }
  
      private static final long serialVersionUID = 1L;
      private ReguessableValue lastRemoved;
  
      public void update(AssumptionViolatedException e) {
          if (lastRemoved != null) {
              addAll(lastRemoved.reguesses(e));
          }
      }
  
      @Override
      public ReguessableValue remove(int index) {
          lastRemoved = super.remove(index);
          return lastRemoved;
      }
  }