/*
    * #%L
    * prolobjectlink-jpi-jtrolog
    * %%
    * Copyright (C) 2019 Prolobjectlink Project
    * %%
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Lesser General Public License as
    * published by the Free Software Foundation, either version 2.1 of the
   * License, or (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Lesser Public License for more details.
   * 
   * You should have received a copy of the GNU General Lesser Public
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/lgpl-2.1.html>.
   * #L%
   */
  package io.github.prolobjectlink.prolog.jtrolog;
  
  import java.util.AbstractSet;
  import java.util.Iterator;
  import java.util.Set;
  
  import io.github.prolobjectlink.prolog.PrologOperator;
  import io.github.prolobjectlink.prolog.PrologOperatorSet;
  import jTrolog.engine.Prolog;
  
  /**
   * 
   * @author Jose Zalacain
   * @since 1.0
   */
  final class JTrologOperatorSet extends AbstractSet<PrologOperator> implements PrologOperatorSet {
  
  	private final Set<PrologOperator> operators;
  
  	JTrologOperatorSet() {
  		Prolog engine = Prolog.defaultMachine;
  		operators = JTrologUtil.getOperatorSet(engine);
  	}
  
  	public boolean currentOp(String opreator) {
  		for (PrologOperator operatorEntry : operators) {
  			if (operatorEntry.getOperator().equals(opreator)) {
  				return true;
  			}
  		}
  		return false;
  	}
  
  	@Override
  	public Iterator<PrologOperator> iterator() {
  		return operators.iterator();
  	}
  
  	@Override
  	public int size() {
  		return operators.size();
  	}
  
  	@Override
  	public int hashCode() {
  		final int prime = 31;
  		int result = super.hashCode();
  		result = prime * result + ((operators == null) ? 0 : operators.hashCode());
  		return result;
  	}
  
  	@Override
  	public boolean equals(Object obj) {
  		if (this == obj)
  			return true;
  		if (!super.equals(obj))
  			return false;
  		if (getClass() != obj.getClass())
  			return false;
  		JTrologOperatorSet other = (JTrologOperatorSet) obj;
  		if (operators == null) {
  			if (other.operators != null)
  				return false;
  		} else if (!operators.equals(other.operators)) {
  			return false;
  		}
  		return true;
  	}
  
  }