LangUtils.java

package com.thomasdh.roosterpgplus.Helpers.Apache;

class LangUtils {
    public static final int HASH_SEED = 17;
    public static final int HASH_OFFSET = 37;

    /** Disabled default constructor. */
    private LangUtils() {
    }

    public static int hashCode(final int seed, final int hashcode) {
        return seed * HASH_OFFSET + hashcode;
    }

    public static int hashCode(final int seed, final Object obj) {
        return hashCode(seed, obj != null ? obj.hashCode() : 0);
    }

    public static boolean equals(final Object obj1, final Object obj2) {
        return obj1 == null ? obj2 == null : obj1.equals(obj2);
    }

    public static boolean equals(final Object[] a1, final Object[] a2) {
        if (a1 == null) {
            if (a2 == null) {
                return true;
            } else {
                return false;
            }
        } else {
            if (a2 != null && a1.length == a2.length) {
                for (int i = 0; i < a1.length; i++) {
                    if (!equals(a1[i], a2[i])) {
                        return false;
                    }
                }
                return true;
            } else {
                return false;
            }
        }
    }
}