From 87591655ad6114e17b549bfdcf61667dc29c95bc Mon Sep 17 00:00:00 2001
From: Florian Schmaus <flo@geekplace.eu>
Date: Sun, 17 May 2020 20:47:18 +0200
Subject: [PATCH] [core] Add StanzaFilter.asPredicate(Class)

---
 .../java/org/jivesoftware/smack/filter/StanzaFilter.java | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/smack-core/src/main/java/org/jivesoftware/smack/filter/StanzaFilter.java b/smack-core/src/main/java/org/jivesoftware/smack/filter/StanzaFilter.java
index f37d08b11..147d0c9f1 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/filter/StanzaFilter.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/filter/StanzaFilter.java
@@ -66,4 +66,13 @@ public interface StanzaFilter extends Predicate<Stanza> {
     default boolean test(Stanza stanza) {
         return accept(stanza);
     }
+
+    default <S extends Stanza> Predicate<S> asPredicate(Class<?> stanzaClass) {
+        return s -> {
+            if (!stanzaClass.isAssignableFrom(s.getClass())) {
+                return false;
+            }
+            return accept(s);
+        };
+    }
 }