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/*
 * The MIT License
 *
 * Copyright 2024 Edgar Asatryan .
 * Copyright 2024 Jens Borch Christiansen .
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package cz.jirutka.rsql.parser.ast;

final class NAry implements Arity {

    private final int n;

    NAry(int n) {
        if (n < 0) {
            throw new IllegalArgumentException("n must be positive or zero");
        }

        this.n = n;
    }

    @Override
    public int min() {
        return n;
    }

    @Override
    public int max() {
        return n;
    }

    @Override
    public boolean equals(Object obj) {
        return this == obj || obj instanceof NAry && ((Arity) obj).min() == min() && ((Arity) obj).max() == max();
     }

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