content: /**
   * Copyright (c) 2016-2018, the Alpha Team.
   * All rights reserved.
   * 
   * Additional changes made by Siemens.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   * 
   * 1) Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   * 
   * 2) Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package at.ac.tuwien.kr.alpha.core.solver.heuristics;
  
  import at.ac.tuwien.kr.alpha.core.common.NoGood;
  import at.ac.tuwien.kr.alpha.core.solver.ChoiceManager;
  import at.ac.tuwien.kr.alpha.core.solver.learning.GroundConflictNoGoodLearner.ConflictAnalysisResult;
  
  import static at.ac.tuwien.kr.alpha.core.programs.atoms.Literals.atomToLiteral;
  
  import java.util.Collection;
  
  /**
   * The default heuristic that had been used by {@link at.ac.tuwien.kr.alpha.core.solver.DefaultSolver} before {@link BerkMin} was implemented.
   *
   */
  public class NaiveHeuristic implements BranchingHeuristic {
  
  	private final ChoiceManager choiceManager;
  
  	public NaiveHeuristic(ChoiceManager choiceManager) {
  		this.choiceManager = choiceManager;
  	}
  
  	@Override
  	public void violatedNoGood(NoGood violatedNoGood) {
  	}
  
  	@Override
  	public void analyzedConflict(ConflictAnalysisResult analysisResult) {
  	}
  
  	@Override
  	public void newNoGood(NoGood newNoGood) {
  	}
  
  	@Override
  	public void newNoGoods(Collection<NoGood> newNoGoods) {
  	}
  
  	@Override
  	public int chooseLiteral() {
  		return atomToLiteral(choiceManager.getNextActiveChoiceAtom());
  	}
  	
  	@Override
  	public String toString() {
  		return this.getClass().getSimpleName();
  	}
  }
  