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Java library to use the apps.codeslap.com API

There is a newer version: 1.0.1

package com.codeslap.apps.api;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * Serie of methods useful to compare objects
 *
 * @author evelio
 * @version 1.0
 */
abstract class CompareUtils {
    /**
     * Non instance constants class
     */
    private CompareUtils() {
    }

    /**
     * Compares with equals two objects if first is not null,
     * if first is null compares it with ==
     *
     * @param obj1 first object to compare
     * @param obj2 second object to compare
     * @return true if the objects are equals false otherwise
     */
    public static boolean areEquals(Object obj1, Object obj2) {
        if (obj1 != null) {
            return obj1.equals(obj2);
        }
        return obj1 == obj2;
    }

    /**
     * Compare two maps by its contents
     * It is an alternative to Map.equals function, it pretends to compare two maps.
     * by comparing size, keys and values rater than if they are the same object.
     * Note: In case one of the maps is not instance of map == operator will be used.
     *
     * @param map1 first map to compare
     * @param map2 second map to compare
     * @return true if both has the same size, keys and values
     *         true in case one of them is null and when compared with == returns true (i.e. null == null)).
     *         false otherwise
     */
    @SuppressWarnings({"rawtypes", "unchecked"})
    public static boolean areMapsContentEquals(Map map1, Map map2) {
        if (map1 != null && map2 != null) {
            if (!(map1.size() == map2.size() && areEquals(map1.keySet(), map2.keySet()))) {//If aren't same size and same keys
                return false;
            }

            List values1 = new ArrayList(map1.values());
            List values2 = new ArrayList(map2.values());

            if (map1.size() > 1) {//If there are more than one element must be sorted
                Collections.sort(values1);
                Collections.sort(values2);
            }

            return areEquals(values1, values2);
        }
        return map1 == map2;
    }
}