package com.lcjian.library.util.common;
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/**
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* Object Utils
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*
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* @author LCJIAN
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*/
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public class ObjectUtils {
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/**
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* compare two object
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*
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* @param actual
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* @param expected
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* @return <ul>
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* <li>if both are null, return true</li>
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* <li>return actual.{@link Object#equals(Object)}</li>
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* </ul>
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*/
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public static boolean isEquals(Object actual, Object expected) {
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return actual == expected || (actual == null ? expected == null : actual.equals(expected));
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}
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/**
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* compare two object
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* <ul>
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* <strong>About result</strong>
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* <li>if v1 > v2, return 1</li>
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* <li>if v1 = v2, return 0</li>
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* <li>if v1 < v2, return -1</li>
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* </ul>
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* <ul>
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* <strong>About rule</strong>
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* <li>if v1 is null, v2 is null, then return 0</li>
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* <li>if v1 is null, v2 is not null, then return -1</li>
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* <li>if v1 is not null, v2 is null, then return 1</li>
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* <li>return v1.{@link Comparable#compareTo(Object)}</li>
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* </ul>
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*
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* @param v1
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* @param v2
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* @return
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*/
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@SuppressWarnings({ "unchecked", "rawtypes" })
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public static <V> int compare(V v1, V v2) {
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return v1 == null ? (v2 == null ? 0 : -1) : (v2 == null ? 1 : ((Comparable) v1).compareTo(v2));
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}
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}
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