/*
    * #%L
    * prolobjectlink-jpi-jtrolog
    * %%
    * Copyright (C) 2012 - 2018 WorkLogic 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 jTrolog.terms;
  
  import java.util.Iterator;
  
  import jTrolog.engine.Prolog;
  import jTrolog.parser.Parser;
  @SuppressWarnings({ "serial" })
  public class StructAtom extends Struct {
  
  	public StructAtom(String name) {
  		super(name, new Term[0]);
  		type = Term.ATOM;
  	}
  
  	public boolean equals(Object t) {
  		return t instanceof StructAtom && name == ((StructAtom) t).name;
  	}
  
  	public String toString() {
  		if (name.isEmpty()) {
  			return "''";
  		} else if (!Parser.isAtom(name) && !isOperator(name) && !name.equals("[]")) {
  			return "'" + name + "'";
  		}
  		return name;
  	}
  
  	public String toStringSmall() {
  		return toString();
  	}
  
  	private boolean isOperator(String name) {
  		Prolog engine = Prolog.defaultMachine;
  		Iterator<?> i = engine.getCurrentOperators();
  		while (i.hasNext()) {
  			Object object = i.next();
  			if (object instanceof Struct) {
  				Struct o = (Struct) object;
  				String n = ((StructAtom) o.getArg(2)).name;
  				if (name.equals(n)) {
  					return true;
  				}
  			}
  		}
  		return false;
  	}
  
  }