/**
 * Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite 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 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite 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
 * Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
 */
package org.evosuite.utils;
public abstract class HashUtil {
	/** Constant <code>DEFAULT_PRIME=31</code> */
	public static final int DEFAULT_PRIME = 31;
	
	/**
	 * <p>hashCodeWithPrime</p>
	 *
	 * @param prime a int.
	 * @param components a {@link java.lang.Object} object.
	 * @return a int.
	 */
	public static final int hashCodeWithPrime(int prime, Object... components) {
		int result = 1;
		
		for (Object component : components) {
			result = prime * result + ((component == null) ? 0 : component.hashCode());
		}
		
		return result;
	}
	
	/**
	 * <p>hashCodeWithPrime</p>
	 *
	 * @param prime a int.
	 * @param componentHashCodes a int.
	 * @return a int.
	 */
	public static final int hashCodeWithPrime(int prime, int... componentHashCodes) {
		int result = 1;
		
		for (int componentHashCode : componentHashCodes) {
			result = prime * result + componentHashCode;
		}
		
		return result;
	}
	
	/**
	 * <p>hashCode</p>
	 *
	 * @param components a {@link java.lang.Object} object.
	 * @return a int.
	 */
	public static final int hashCode(Object... components) {
		return hashCodeWithPrime(DEFAULT_PRIME, components);
	}
/*	
	public static final int hashCode(int... componentHashCodes) {
		return hashCodeWithPrime(DEFAULT_PRIME, componentHashCodes);
	}
*/
}