/*-
    * #%L
    * prolobjectlink-jpi-jpl
    * %%
    * Copyright (C) 2012 - 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.jpl;
  
  import static io.github.prolobjectlink.prolog.PrologTermType.OBJECT_TYPE;
  
  import io.github.prolobjectlink.prolog.PrologProvider;
  import io.github.prolobjectlink.prolog.PrologReference;
  import io.github.prolobjectlink.prolog.PrologTerm;
  import jpl.JPL;
  import jpl.Term;
  
  public final class JplReference extends JplTerm implements PrologReference {
  
  	JplReference(PrologProvider provider, Term reference) {
  		super(OBJECT_TYPE, provider, reference);
  	}
  
  	JplReference(PrologProvider provider, Object reference) {
  		super(OBJECT_TYPE, provider, JPL.newJRef(reference));
  	}
  
  	@Override
  	public Class<?> getReferenceType() {
  		Object object = getObject();
  		if (object != null) {
  			object.getClass();
  		}
  		return null;
  	}
  
  	@Override
  	public int getArity() {
  		return value.arity();
  	}
  
  	@Override
  	public String getFunctor() {
  		return value.name();
  	}
  
  	@Override
  	public PrologTerm[] getArguments() {
  		return toTermArray(value.args(), PrologTerm[].class);
  	}
  
  	public Object getObject() {
  		if (value.isJFalse()) {
  			return Boolean.FALSE;
  		} else if (value.isJTrue()) {
  			return Boolean.TRUE;
  		} else if (value.isJVoid()) {
  			return void.class;
  		} else if (value.isJRef()) {
  			return value.jrefToObject();
  		}
  		return null;
  	}
  
  }