com.mogudiandian.util.lang.EnhancedEqualsUtils Maven / Gradle / Ivy
package com.mogudiandian.util.lang;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import sun.misc.Unsafe;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.*;
import java.util.function.BiFunction;
/**
* 增强型的比较相同工具类
*
* @author Joshua Sun
* @since 1.0.9
*/
public final class EnhancedEqualsUtils {
private EnhancedEqualsUtils() {}
/**
* Compares two objects for equality.
*
* @param o1 The first object to compare.
* @param o2 The second object to compare.
* @return {@code true} if the objects are equal, {@code false} otherwise.
*/
public static boolean equals(Object o1, Object o2) {
return objectEquals(o1, o2);
}
/**
* Compares multiple objects for equality.
*
* @param o1 The first object to compare.
* @param o2 The second object to compare.
* @param o3 The third object to compare.
* @param os Additional objects to compare.
* @return {@code true} if all objects are equal, {@code false} otherwise.
*/
public static boolean equals(Object o1, Object o2, Object o3, Object... os) {
if (equals(o1, o2) && equals(o1, o3)) {
if (os == null) {
return true;
}
for (Object o : os) {
if (!equals(o1, o)) {
return false;
}
}
return true;
}
return false;
}
/**
* Compares an array of objects for equality.
*
* @param os The array of objects to compare.
* @return {@code true} if all objects in the array are equal, {@code false} otherwise.
*/
public static boolean equals(Object[] os) {
if (os == null || os.length < 2) {
return false;
}
Object o1 = os[0];
for (int i = 1, len = os.length; i < len; i++) {
if (!equals(o1, os[i])) {
return false;
}
}
return true;
}
/**
* Compares a collection of objects for equality.
*
* @param c The collection of objects to compare.
* @return {@code true} if all objects in the collection are equal, {@code false} otherwise.
*/
public static boolean equals(Collection c) {
if (c == null || c.size() < 2) {
return false;
}
Iterator iterator = c.iterator();
for (Object o1 = iterator.next(), o; iterator.hasNext(); ) {
o = iterator.next();
if (!equals(o1, o)) {
return false;
}
}
return true;
}
/**
* Compares two objects for equality.
*
* @param o1 The first object to compare.
* @param o2 The second object to compare.
* @return {@code true} if the objects are equal, {@code false} otherwise.
*/
private static boolean objectEquals(Object o1, Object o2) {
if (o1 == o2) {
return true;
}
if (o1 == null || o2 == null) {
return false;
}
if (o1 instanceof Number && o2 instanceof Number) {
return numberEquals((Number) o1, (Number) o2);
}
if (o1 instanceof CharSequence && o2 instanceof CharSequence) {
return charSequenceEquals((CharSequence) o1, (CharSequence) o2);
}
if (isDateType(o1) && isDateType(o2)) {
return getTimeInMillis(o1) == getTimeInMillis(o2);
}
if (o1 instanceof Collection && o2 instanceof Collection) {
return collectionEquals((Collection) o1, (Collection) o2);
}
if (o1.getClass().isArray() && o2.getClass().isArray()) {
return arrayEquals(o1, o2);
}
if (o1 instanceof Map.Entry && o2 instanceof Map.Entry) {
return entryEquals((Map.Entry) o1, (Map.Entry) o2);
}
if (o1 instanceof Map && o2 instanceof Map) {
return mapEquals((Map) o1, (Map) o2);
}
if (o1.equals(o2)) {
return true;
}
if (beanEquals(o1, o2)) {
return true;
}
return Objects.equals(o1.toString(), o2.toString());
}
/**
* Compares two numbers for equality.
*
* @param n1 The first number to compare.
* @param n2 The second number to compare.
* @return {@code true} if the numbers are equal, {@code false} otherwise.
*/
public static boolean numberEquals(Number n1, Number n2) {
if (n1 == n2) {
return true;
}
if (n1 == null || n2 == null) {
return false;
}
if (n1.equals(n2)) {
return true;
}
BigDecimal d1 = null, d2 = null;
if (n1 instanceof BigDecimal) {
d1 = (BigDecimal) n1;
} else if (n1 instanceof Double || n1 instanceof Float) {
d1 = BigDecimal.valueOf(n1.doubleValue());
}
if (n2 instanceof BigDecimal) {
d2 = (BigDecimal) n2;
} else if (n2 instanceof Double || n2 instanceof Float) {
d2 = BigDecimal.valueOf(n2.doubleValue());
}
if (d1 != null && d2 != null) {
return d1.compareTo(d2) == 0;
}
if (d1 != null) {
return d1.compareTo(new BigDecimal(n2.toString())) == 0;
}
if (d2 != null) {
return d2.compareTo(new BigDecimal(n1.toString())) == 0;
}
BigInteger i1 = null, i2 = null;
if (n1 instanceof BigInteger) {
i1 = (BigInteger) n1;
} else if (n1 instanceof Byte || n1 instanceof Short || n1 instanceof Integer || n1 instanceof Long) {
i1 = BigInteger.valueOf(n1.longValue());
}
if (n2 instanceof BigInteger) {
i2 = (BigInteger) n2;
} else if (n2 instanceof Byte || n2 instanceof Short || n2 instanceof Integer || n2 instanceof Long) {
i2 = BigInteger.valueOf(n2.longValue());
}
if (i1 != null && i2 != null) {
return i1.compareTo(i2) == 0;
}
if (i1 != null) {
return i1.toString().equals(n2.toString());
}
if (i2 != null) {
return i2.toString().equals(n1.toString());
}
if (n1.doubleValue() == n2.doubleValue()) {
return true;
}
return new BigDecimal(n1.toString()).compareTo(new BigDecimal(n2.toString())) == 0;
}
/**
* Compares two CharSequence objects for equality.
*
* @param s1 The first CharSequence object to compare.
* @param s2 The second CharSequence object to compare.
* @return {@code true} if the CharSequences are equal, {@code false} otherwise.
*/
public static boolean charSequenceEquals(CharSequence s1, CharSequence s2) {
if (s1 == s2) {
return true;
}
if (s1 == null || s2 == null) {
return false;
}
int len = s1.length();
if (len != s2.length()) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && s1.charAt(i) == s2.charAt(j)) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Checks if the given object is of a date type.
*
* @param o The object to check.
* @return {@code true} if the object is of a date type, {@code false} otherwise.
*/
private static boolean isDateType(Object o) {
return o instanceof Date
|| o instanceof Calendar
|| o instanceof Instant
|| o instanceof LocalDateTime
|| o instanceof LocalDate;
}
/**
* Returns the time in milliseconds for the given date object.
*
* @param o The date object. This can be one of the following types:
* - java.util.Date
* - java.util.Calendar
* - java.time.Instant
* - java.time.LocalDateTime
* - java.time.LocalDate
* @return The time in milliseconds represented by the given date object.
* @throws IllegalArgumentException if the given object is not of a date type.
*/
private static long getTimeInMillis(Object o) {
if (o instanceof Date) {
return ((Date) o).getTime();
}
if (o instanceof Calendar) {
return ((Calendar) o).getTimeInMillis();
}
if (o instanceof Instant) {
return ((Instant) o).toEpochMilli();
}
if (o instanceof LocalDateTime) {
return ((LocalDateTime) o).atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
}
if (o instanceof LocalDate) {
return ((LocalDate) o).atStartOfDay(ZoneId.systemDefault()).toInstant().toEpochMilli();
}
throw new IllegalArgumentException("Not support for type " + o.getClass().getName());
}
/**
* Compares two collections for equality, with no need for the same order.
*
* @param c1 The first collection to compare.
* @param c2 The second collection to compare.
* @param The type of elements in the collection.
* @return {@code true} if the collections are equal, {@code false} otherwise.
*/
public static boolean collectionEquals(Collection c1, Collection c2) {
if (c1 == c2) {
return true;
}
if (c1 == null || c2 == null) {
return false;
}
int len = c1.size();
if (len != c2.size()) {
return false;
}
boolean[] found = new boolean[len];
for (Iterator iterator1 = c1.iterator(); iterator1.hasNext(); ) {
E c1i = iterator1.next();
boolean match = false;
int j = 0;
for (Iterator iterator2 = c2.iterator(); iterator2.hasNext(); j++) {
E c2j = iterator2.next();
if (!found[j] && objectEquals(c1i, c2j)) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param o1 The first array to compare.
* @param o2 The second array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(Object o1, Object o2) {
if (o1 == o2) {
return true;
}
if (o1 == null || o2 == null) {
return false;
}
if (o1 instanceof Object[] && o2 instanceof Object[]) {
return arrayEquals ((Object[]) o1, (Object[]) o2);
}
if (o1 instanceof long[] && o2 instanceof long[]) {
return arrayEquals((long[]) o1, (long[]) o2);
}
if (o1 instanceof int[] && o2 instanceof int[]) {
return arrayEquals((int[]) o1, (int[]) o2);
}
if (o1 instanceof short[] && o2 instanceof short[]) {
return arrayEquals((short[]) o1, (short[]) o2);
}
if (o1 instanceof byte[] && o2 instanceof byte[]) {
return arrayEquals((byte[]) o1, (byte[]) o2);
}
if (o1 instanceof double[] && o2 instanceof double[]) {
return arrayEquals((double[]) o1, (double[]) o2);
}
if (o1 instanceof float[] && o2 instanceof float[]) {
return arrayEquals((float[]) o1, (float[]) o2);
}
if (o1 instanceof char[] && o2 instanceof char[]) {
return arrayEquals((char[]) o1, (char[]) o2);
}
if (o1 instanceof boolean[] && o2 instanceof boolean[]) {
return arrayEquals((boolean[]) o1, (boolean[]) o2);
}
return arrayEqualsByUnsafe(o1, o2);
}
/**
* Compares two object arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param a1 The first array to compare.
* @param a2 The second array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(Object[] a1, Object[] a2) {
if (a1 == a2) {
return true;
}
if (a1 == null || a2 == null) {
return false;
}
int len = a1.length;
if (len != a2.length) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && objectEquals(a1[i], a2[j])) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two object arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param a1 The first array to compare.
* @param a2 The second array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(long[] a1, long[] a2) {
if (a1 == a2) {
return true;
}
if (a1 == null || a2 == null) {
return false;
}
int len = a1.length;
if (len != a2.length) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && a1[i] == a2[j]) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two long arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param a1 The first long array to compare.
* @param a2 The second long array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(int[] a1, int[] a2) {
if (a1 == a2) {
return true;
}
if (a1 == null || a2 == null) {
return false;
}
int len = a1.length;
if (len != a2.length) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && a1[i] == a2[j]) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two short arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param a1 The first short array to compare.
* @param a2 The second short array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(short[] a1, short[] a2) {
if (a1 == a2) {
return true;
}
if (a1 == null || a2 == null) {
return false;
}
int len = a1.length;
if (len != a2.length) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && a1[i] == a2[j]) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two byte arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param a1 The first byte array to compare.
* @param a2 The second byte array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(byte[] a1, byte[] a2) {
if (a1 == a2) {
return true;
}
if (a1 == null || a2 == null) {
return false;
}
int len = a1.length;
if (len != a2.length) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && a1[i] == a2[j]) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two double arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param a1 The first double array to compare.
* @param a2 The second double array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(double[] a1, double[] a2) {
if (a1 == a2) {
return true;
}
if (a1 == null || a2 == null) {
return false;
}
int len = a1.length;
if (len != a2.length) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && a1[i] == a2[j]) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two float arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param a1 The first float array to compare.
* @param a2 The second float array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(float[] a1, float[] a2) {
if (a1 == a2) {
return true;
}
if (a1 == null || a2 == null) {
return false;
}
int len = a1.length;
if (len != a2.length) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && a1[i] == a2[j]) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two char arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param a1 The first char array to compare.
* @param a2 The second char array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(char[] a1, char[] a2) {
if (a1 == a2) {
return true;
}
if (a1 == null || a2 == null) {
return false;
}
int len = a1.length;
if (len != a2.length) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && a1[i] == a2[j]) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two boolean arrays for equality, supporting different types of arrays, with no need for the same order.
*
* @param a1 The first boolean array to compare.
* @param a2 The second boolean array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
public static boolean arrayEquals(boolean[] a1, boolean[] a2) {
if (a1 == a2) {
return true;
}
if (a1 == null || a2 == null) {
return false;
}
int len = a1.length;
if (len != a2.length) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && a1[i] == a2[j]) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* Compares two arrays of objects for equality, supporting different types of arrays, with no need for the same order.
*
* @param o1 The first array to compare.
* @param o2 The second array to compare.
* @return {@code true} if the arrays are equal, {@code false} otherwise.
*/
private static boolean arrayEqualsByUnsafe(Object o1, Object o2) {
if (o1 == o2) {
return true;
}
if (o1 == null || o2 == null) {
return false;
}
int len = Array.getLength(o1);
if (len != Array.getLength(o2)) {
return false;
}
Unsafe unsafe = UnsafeHolder.UNSAFE;
BiFunction accessor1 = getPrimitiveArrayElementAccessor(unsafe, o1);
if (accessor1 == null) {
return arrayEqualsByReflection(o1, o2);
}
BiFunction accessor2 = getPrimitiveArrayElementAccessor(unsafe, o2);
if (accessor2 == null) {
return arrayEqualsByReflection(o1, o2);
}
Class o1Class = o1.getClass(), o2Class = o2.getClass();
int offset1 = unsafe.arrayBaseOffset(o1Class), elementSize1 = unsafe.arrayIndexScale(o1Class), shift1 = 31 - Integer.numberOfLeadingZeros(elementSize1);
int offset2 = unsafe.arrayBaseOffset(o2Class), elementSize2 = unsafe.arrayIndexScale(o2Class), shift2 = 31 - Integer.numberOfLeadingZeros(elementSize2);
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
double o1i = accessor1.apply(o1, offset1 + ((long) i << shift1)).doubleValue();
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && o1i == accessor2.apply(o2, offset2 + ((long) j << shift2)).doubleValue()) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* 获取基本类型数组的元素访问器
* 访问器为双参函数 参数1为数组对象 参数2为offset(不是index)
* @param unsafe Unsafe对象
* @param object 数组
* @return 访问器的函数 如果返回null表示不是基本类型数组
*/
private static BiFunction getPrimitiveArrayElementAccessor(Unsafe unsafe, Object object) {
if (object instanceof long[]) {
return unsafe::getLong;
}
if (object instanceof int[]) {
return unsafe::getInt;
}
if (object instanceof short[]) {
return unsafe::getShort;
}
if (object instanceof byte[]) {
return unsafe::getByte;
}
if (object instanceof double[]) {
return unsafe::getDouble;
}
if (object instanceof float[]) {
return unsafe::getFloat;
}
if (object instanceof char[]) {
return (arr, offset) -> (int) unsafe.getChar(arr, offset);
}
if (object instanceof boolean[]) {
return (arr, offset) -> unsafe.getBoolean(arr, offset) ? 1 : 0;
}
return null;
}
/**
* 使用反射比较两个数组是否相等
* @param o1 第一个数组
* @param o2 第二个数组
* @return 如果两个数组相等返回true，否则返回false
*/
private static boolean arrayEqualsByReflection(Object o1, Object o2) {
if (o1 == o2) {
return true;
}
if (o1 == null || o2 == null) {
return false;
}
int len = Array.getLength(o1);
if (len != Array.getLength(o2)) {
return false;
}
boolean[] found = new boolean[len];
for (int i = 0; i < len; i++) {
Object o1i = Array.get(o1, i);
boolean match = false;
for (int j = 0; j < len; j++) {
if (!found[j] && objectEquals(o1i, Array.get(o2, j))) {
found[j] = true;
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
/**
* 比较两个Map.Entry对象是否相等
*
* @param e1 第一个Map.Entry对象
* @param e2 第二个Map.Entry对象
* @param Map.Entry键的类型
* @param Map.Entry值的类型
* @return 如果两个Map.Entry对象相等返回true，否则返回false
*/
public static boolean entryEquals(Map.Entry e1, Map.Entry e2) {
if (e1 == e2) {
return true;
}
if (e1 == null || e2 == null) {
return false;
}
return objectEquals(e1.getKey(), e2.getKey()) && objectEquals(e1.getValue(), e2.getValue());
}
/**
* 比较两个Map对象是否相等
*
* @param m1 第一个Map对象
* @param m2 第二个Map对象
* @param Map键的类型
* @param Map值的类型
* @return 如果两个Map对象相等返回true，否则返回false
*/
public static boolean mapEquals(Map m1, Map m2) {
if (m1 == m2) {
return true;
}
if (m1 == null || m2 == null) {
return false;
}
int len = m1.size();
if (len != m2.size()) {
return false;
}
return collectionEquals(m1.entrySet(), m2.entrySet());
}
/**
* 比较两个Bean对象是否相等
*
* @param o1 第一个Bean对象
* @param o2 第二个Bean对象
* @return 如果两个Bean对象相等返回true，否则返回false
*/
private static boolean beanEquals(Object o1, Object o2) {
if (o1 == o2) {
return true;
}
if (o1 == null || o2 == null) {
return false;
}
Object j1 = JSON.toJSON(o1), j2 = JSON.toJSON(o2);
if (j1 instanceof JSONArray && j2 instanceof JSONArray) {
return collectionEquals((JSONArray) j1, (JSONArray) j2);
}
if (j1 instanceof JSONObject && j2 instanceof JSONObject) {
JSONObject jo1 = (JSONObject) j1, jo2 = (JSONObject) j2;
removeNullValuesForMap(jo1);
removeNullValuesForMap(jo2);
return mapEquals(jo1, jo2);
}
return false;
}
/**
* 移除Map中值为null的元素
*
* @param map 要操作的Map对象
*/
private static void removeNullValuesForMap(Map map) {
map.entrySet().removeIf(entry -> entry.getValue() == null);
}
/**
* This class provides a means to obtain the singleton instance of the {@code Unsafe} class, which allows access to low-level operations in Java.
*
* The singleton instance of {@code Unsafe} is obtained using reflection to access the private field "theUnsafe" in the {@code Unsafe} class.
*
*
* Note: The {@code Unsafe} class is intended for advanced developers and should be used with caution as it allows direct memory access and other unsafe operations.
*
*/
private static class UnsafeHolder {
private static final Unsafe UNSAFE;
static {
try {
Field theUnsafeField = Unsafe.class.getDeclaredField("theUnsafe");
theUnsafeField.setAccessible(true);
UNSAFE = (Unsafe) theUnsafeField.get(null);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
}