/*
    * #%L
    * prolobjectlink-jpi-jpl7
    * %%
    * Copyright (C) 2019 Prolobjectlink Project
    * %%
    * 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 HOLDERS OR CONTRIBUTORS BE
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   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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   * #L%
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  package io.github.prolobjectlink.prolog.jpl7;
  
  import io.github.prolobjectlink.prolog.AbstractClause;
  import io.github.prolobjectlink.prolog.PrologClause;
  import io.github.prolobjectlink.prolog.PrologIndicator;
  import io.github.prolobjectlink.prolog.PrologProvider;
  import io.github.prolobjectlink.prolog.PrologTerm;
  
  /**
   * 
   * @author Jose Zalacain
   * @since 1.0
   */
  final class JplClause extends AbstractClause implements PrologClause {
  
  	private final PrologIndicator indicator;
  
  	JplClause(PrologProvider provider, PrologTerm head, boolean dynamic, boolean multifile, boolean discontiguous) {
  		super(provider, head, dynamic, multifile, discontiguous);
  		this.indicator = new JplIndicator(head.getFunctor(), head.getArity());
  	}
  
  	JplClause(PrologProvider provider, PrologTerm head, PrologTerm body, boolean dynamic, boolean multifile,
  			boolean discontiguous) {
  		super(provider, head, body, dynamic, multifile, discontiguous);
  		this.indicator = new JplIndicator(head.getFunctor(), head.getArity());
  	}
  
  	public PrologIndicator getPrologIndicator() {
  		return indicator;
  	}
  
  	@Override
  	public int hashCode() {
  		final int prime = 31;
  		int result = super.hashCode();
  		result = prime * result + ((indicator == null) ? 0 : indicator.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;
  		JplClause other = (JplClause) obj;
  		if (indicator == null) {
  			if (other.indicator != null)
  				return false;
  		} else if (!indicator.equals(other.indicator)) {
  			return false;
  		}
  		return true;
  	}
  }