content: /**
   * Copyright (c) 2020, the Alpha Team.
   * All rights reserved.
   *
   * 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.grounder.instantiation;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import at.ac.tuwien.kr.alpha.api.grounder.Substitution;
  
  /**
   * Contains substitutions produced for generating ground substitutions of a rule,
   * and for every substitution the number of positive body atoms still unassigned in the respective ground rule.
   */
  public class BindingResult {
  
  	private final List<Substitution> generatedSubstitutions = new ArrayList<>();
  	private final List<Integer> numbersOfUnassignedPositiveBodyAtoms = new ArrayList<>();
  
  	public void add(Substitution generatedSubstitution, int numberOfUnassignedPositiveBodyAtoms) {
  		generatedSubstitutions.add(generatedSubstitution);
  		numbersOfUnassignedPositiveBodyAtoms.add(numberOfUnassignedPositiveBodyAtoms);
  	}
  
  	public void add(BindingResult otherBindingResult) {
  		generatedSubstitutions.addAll(otherBindingResult.generatedSubstitutions);
  		numbersOfUnassignedPositiveBodyAtoms.addAll(otherBindingResult.numbersOfUnassignedPositiveBodyAtoms);
  	}
  
  	public int size() {
  		return generatedSubstitutions.size();
  	}
  
  	public static BindingResult empty() {
  		return new BindingResult();
  	}
  
  	public static BindingResult singleton(Substitution generatedSubstitution, int numberOfUnassignedPositiveBodyAtoms) {
  		BindingResult bindingResult = new BindingResult();
  		bindingResult.add(generatedSubstitution, numberOfUnassignedPositiveBodyAtoms);
  		return bindingResult;
  	}
  
  	public List<Substitution> getGeneratedSubstitutions() {
  		return generatedSubstitutions;
  	}
  
  	public List<Integer> getNumbersOfUnassignedPositiveBodyAtoms() {
  		return numbersOfUnassignedPositiveBodyAtoms;
  	}
  
  }
  