JplClause.java

/*
 * #%L
 * prolobjectlink-jpi-jpl
 * %%
 * 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.jpl;

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;
	}
}