it.unibz.inf.ontop.model.term.impl.PredicateImpl Maven / Gradle / Ivy

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package it.unibz.inf.ontop.model.term.impl;

/*
 * #%L
 * ontop-obdalib-core
 * %%
 * Copyright (C) 2009 - 2014 Free University of Bozen-Bolzano
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import it.unibz.inf.ontop.model.term.functionsymbol.Predicate;

import javax.annotation.Nonnull;


public class PredicateImpl implements Predicate {

	private final int arity;
	private final String name;

	protected PredicateImpl(@Nonnull String name, int arity) {
		this.name = name;
		this.arity = arity;
	}

	@Override
	public int getArity() {
		return arity;
	}

	@Override
	public String getName() {
		return name;
	}

	/**
	 * TODO: also check arity?
	 */
	@Override
	public boolean equals(Object other) {
		return (other instanceof PredicateImpl &&
					this.name.equals(((PredicateImpl) other).name));
	}

	@Override
	public int hashCode() {
		return name.hashCode();
	}

	@Override
	public String toString() {
		return name;
	}
}