From d4e205beed04e313360b92fa7fabefca6726f2ec Mon Sep 17 00:00:00 2001
From: Paul Schaub <vanitasvitae@fsfe.org>
Date: Fri, 11 Sep 2020 14:36:11 +0200
Subject: [PATCH] EqualsUtil, HashCode: Add methods for lists

---
 .../org/jivesoftware/smack/util/EqualsUtil.java   | 15 +++++++++++++++
 .../org/jivesoftware/smack/util/HashCode.java     | 13 +++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/smack-core/src/main/java/org/jivesoftware/smack/util/EqualsUtil.java b/smack-core/src/main/java/org/jivesoftware/smack/util/EqualsUtil.java
index 8110358a7..65b185740 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/util/EqualsUtil.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/util/EqualsUtil.java
@@ -16,6 +16,8 @@
  */
 package org.jivesoftware.smack.util;
 
+import java.util.List;
+
 public final class EqualsUtil {
 
     private EqualsUtil() {
@@ -244,6 +246,19 @@ public final class EqualsUtil {
             });
             return this;
         }
+
+        public <O> Builder append(List<O> left, List<O> right) {
+            nullSafeCompare(left, right, () -> {
+                if (left.size() != right.size()) {
+                    isEquals = false;
+                    return;
+                }
+                for (int i = 0; i < left.size() && isEquals; i++) {
+                    append(left.get(i), right.get(i));
+                }
+            });
+            return this;
+        }
     }
 
 }
diff --git a/smack-core/src/main/java/org/jivesoftware/smack/util/HashCode.java b/smack-core/src/main/java/org/jivesoftware/smack/util/HashCode.java
index 79065850d..61a36f633 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/util/HashCode.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/util/HashCode.java
@@ -16,6 +16,8 @@
  */
 package org.jivesoftware.smack.util;
 
+import java.util.List;
+
 public class HashCode {
 
     private static final int MULTIPLIER_VALUE = 37;
@@ -203,6 +205,17 @@ public class HashCode {
             return this;
         }
 
+        public <O> Builder append(List<O> list) {
+            if (list == null) {
+                applyHash();
+                return this;
+            }
+            for (O o : list) {
+                append(o);
+            }
+            return this;
+        }
+
         public int build() {
             return hashcode;
         }