Catch and ignore exceptions thrown when migrating a specific entity

common/src/main/java/me/lucko/luckperms/common/utils/Predicates.java

@@ -35,19 +35,18 @@ import java.util.stream.IntStream;
 /**
  * A collection of predicate utilities used mostly in command classes
  */
-@SuppressWarnings({"WeakerAccess", "unused"})
 @UtilityClass
 public class Predicates {
     private static final Predicate FALSE = o -> false;
     private static final Predicate TRUE = o -> true;
 
-    @SuppressWarnings("unchecked")
     public static <T> Predicate<T> alwaysFalse() {
+        //noinspection unchecked
         return FALSE;
     }
 
-    @SuppressWarnings("unchecked")
     public static <T> Predicate<T> alwaysTrue() {
+        //noinspection unchecked
         return TRUE;
     }
 

common/src/main/java/me/lucko/luckperms/common/utils/SafeIterator.java

@@ -0,0 +1,76 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package me.lucko.luckperms.common.utils;
+
+import lombok.experimental.UtilityClass;
+
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+@UtilityClass
+public class SafeIterator {
+
+    public static <I> void iterate(Iterable<I> iterable, Consumer<I> action) {
+        for (I i : iterable) {
+            try {
+                action.accept(i);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public static <I, O> void iterate(Iterable<I> iterable, Function<I, O> mapping, Consumer<O> action) {
+        for (I i : iterable) {
+            try {
+                action.accept(mapping.apply(i));
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public static <I> void iterate(I[] array, Consumer<I> action) {
+        for (I i : array) {
+            try {
+                action.accept(i);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public static <I, O> void iterate(I[] array, Function<I, O> mapping, Consumer<O> action) {
+        for (I i : array) {
+            try {
+                action.accept(mapping.apply(i));
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+}