com.gargoylesoftware.css.util.LangUtils Maven / Gradle / Ivy
/*
* Copyright (c) 2018 Ronald Brill.
*
* 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.
*/
package com.gargoylesoftware.css.util;
/**
* Some utils.
*
* @author Ronald Brill
*/
public final class LangUtils {
/** HASH_SEED = 17. */
public static final int HASH_SEED = 17;
/** HASH_OFFSET = 37. */
public static final int HASH_OFFSET = 37;
private LangUtils() {
}
/**
* @param seed the seed to be used
* @param hashcode the hashcode to be used as input
* @return a hash code calculated based on a given one.
*/
public static int hashCode(final int seed, final int hashcode) {
return seed * HASH_OFFSET + hashcode;
}
/**
* @param seed the seed to be used
* @param b the boolean to be used as input
* @return a hash code calculated based on a given boolean.
*/
public static int hashCode(final int seed, final boolean b) {
return hashCode(seed, b ? 1 : 0);
}
/**
* @param seed the seed to be used
* @param obj the object to be used as input
* @return a hash code calculated based on a given object.
*/
public static int hashCode(final int seed, final Object obj) {
return hashCode(seed, obj != null ? obj.hashCode() : 0);
}
/**
* @param obj1 the first object
* @param obj2 the second object
* @return true if the both objects are equals
*/
public static boolean equals(final Object obj1, final Object obj2) {
return obj1 == null ? obj2 == null : obj1.equals(obj2);
}
}